45 results about "Leersia hexandra" patented technology

The invention discloses a bioremediation method of chromium polluted water. A surface flow constructed wetland device is built to lead the chromium-laden plant Leersia hexandra Swartz directly to grow on the well chosen filler; the chromium in the water can be removed by the action of the filler and the plant. The chromium absorbed in the filler can be effectively taken away by periodically reaping the overground part of the Leersia hexandra Swartz to lead the filler keep better treatment effect. The method has good removal effect on chromium with different forms and has the advantages of low cost, simple operation, low consumption, easy maintenance, high chromium removal rate and no secondary pollution, etc. The method can be used for repairing and controlling the chromium polluted water produced in electroplating, smelting and leather processing. The repaired water can achieve the requirement of the national related water standard.

The invention discloses an organic grass carp forage and a preparation method. The forage is characterized by comprising the following components by weight: 7%-10% of natural fish meal, 15%-20% of organic soybean cake powder, 10%-15% of organic wheat bran, 14%-18% of organic rice bran, 5%-8% of Typha angustifolia powder, 10%-12% of Leersia hexandra grass powder, 6%-10% of zizania grass powder, 3%-8% of yeast powder, 6%-10% of organic vegetable powder, 3%-5% of organic flour, 1%-3% of spirulina powder, 1% of Chinese herbal medicinal powder, 0.1% of EM bacteria, and 0.1% of brown sugar. The formula of the forage involves a plurality of organic raw materials, and provides a forage foundation for organic grass carp production. The organic grass carp forage prepared according to the formula has the advantages of comprehensive nutrition, good palatability, easy digestion and quick absorption. The forage can promote grass carps to grow robustly when it is applied to feed grass carps, which can have strong disease resistance and a high feed survival rate, so that the forage has very good effects on fingerling and adult fish feeding. The organic grass carp forage involved in the invention has the characteristics of wide raw material sources, easy and practical operation, reasonable proportioning, and low cost.

The invention discloses a method for the plant arrangement of a vertical flow and horizontal subsurface flow combined artificial wetland. By adopting the method, good landscape effect and good sewage treatment effect are obtained. The horizontal subsurface flow wetland pool of the vertical flow and horizontal subsurface flow combined artificial wetland can be used for planting any one or more of the following plants: reeds, Cannan indiea, myrtles, ciliate desert grass, pokeberry, Leersia hexandra, Cyperusalternifolius and Indian mustard plants; the vertical flow wetland pool of the vertical flow and horizontal subsurface flow combined artificial wetland can be used for planting any one or more of the following plants: Juncus bufonius, willow herb, Sedum alfredii Hance, Thlaspi caerulescens, ryegrass, myrtle, ciliate desert grass, pokeberry, Leersia hexandra, Cyperusalternifolius and Indian mustard plants; the ratio of the number of plants of the vertical flow wetland pool to the number of plants of the horizontal subsurface flow wetland pool is 1:1.5-2, and after water is impounded, floating plants such as water lily and / or water hyacinth are planted on the water surface of the vertical flow wetland pool. The invention has the advantages of low cost, high treatment efficiency, easy growth and good landscape effect.

The invention discloses a method for detecting Leersia hexandra middlechro (VI) ion concentration by using a CdTe@SiO2 quantum dot-rhodamine B energy converting system. The system regards CdTe@SiO2 quantum dot as a donor, regards the rhodamine B as an acceptor, utilizes chromium (VI) ions and the rhodamine B to form novel composite in a combining mode through static interaction, causes the fluorescence of the rhodamine B extinction, thereby establishing the method for detecting Leersia hexandra middlechro (VI) ions. The extinction degree of the rhodamine B fluorescence and the concentration of the chromium (VI) ions are in a good linear relation in the range of 2.0*10-8-3.0*10-7 mole / liter, the linear relevant coefficient r=0.9992, and method detection limit is 6.2*10-9 mole / liter. The method for swiftly detecting the Leersia hexandra middlechro (VI) ion concentration overcomes the defects of being poor in selectivity, low in sensitivity, rigorous in reaction condition and bad in stability and the like while detecting in the prior art, effectively improves selectivity and sensitivity, and so that the detection for the Leersia hexandra middlechro (VI) ions are more convenient and swift.

The invention discloses a preparation method and an application of leersia hexandra swartz endophytic bacterium capable of reducing hexavalent chromium. The strain is classified and named as bacillussp. Y04, which is preserved in China General Microbiological Culture Collection Center in No.3, No.1 Yard, West Beichen Road, Chaoyang District, Beijing on June 22, 2017 with preservation number of CGMCC NO.14266, postal code: 100101. Th leersia hexandra swartz endophytic bacterium is separated and screened out from leaf tissues of chromium hyper-accumulated plant, namely leersia hexandra swartz and is identified to be bacillus sp., named as Y04. The strain can reduce the hexavalent chromium and trivalent chromium, and conditions of reducing the hexavalent chromium are confirmed; therefore, astrain resource and a theoretical basis are provided for microbial remediation of hexavalent chromium pollution.

The invention discloses aLeersia hexandra Swartz endophytic bacteriumcapable of reducing hexavalent chromium. The Leersia hexandra Swartzendophytic bacterium is Bacillus cereus J01 which is isolated by an inventor from stem tissue of chromium superaccumulative plant Leersia hexandra Swartz in a laboratory of the School of Environmental Science and Engineering of Guilin University of Technology, and is preserved in the General Microbial Center of the Chinese Commission for the Preservation and Management of Microbial Specieson June 22, 2017, and the preservation number is CGMCC NO.14267. The Leersia hexandra Swartz endophytic bacterium can reduce hexavalent chromium to trivalent chromium, and a new microbial resource is provided for microbial remediation of hexavalent chromium contamination.

The invention provides a traditional Chinese medicine preparation for treating migraine with obstruction of collaterals by blood stasis and a preparation method thereof. The traditional Chinese medicine preparation comprises the following raw material medicines: radix ilicis asprellae, rhynchosia volubilis, herba rabdosiae, root of dentiferous dendropanax, sweet basil herb, rauvolfia verticillate, Indian nightshade root, lemongrass herb, abrus herb, herba lagotis, six-eared blumea, leersia hexandra, root of artocarpus hypargyreus and Chinese ivy stem. The traditional Chinese medicine preparation provided by the invention has the functions of activating blood and dissolving stasis and dredging collaterals and relieving pain, and realizes an exact curative effect on migraine with obstruction of collaterals by blood stasis while causing few toxic and side effects.

The invention discloses a preparation method of an undisturbed leersia hexandra heavy-metal bio-adsorbent. The preparation method comprises the following steps: (1) washing leaves of leersia hexandra for three times by using tap water, and then washing the leaves for three times by using ultrapure water; (2) putting the leaves of leersia hexandra obtained in the step (1) into a kraft file pocket, putting the kraft file pocket into an air dry oven at the temperature of 80 DEG C, drying for 24 hours, then crushing the leaves by using a high-speed crusher, and sieving the obtained object by using a 100-mesh sieve; and (3) putting the object obtained in the step (2) into a ceramic crucible, putting the ceramic crucible into a muffle furnace at the temperature of 100 DEG C for 6 hours, carrying out natural cooling on the obtained product and then taking out the product, thus obtaining the undisturbed leersia hexandra heavy-metal bio-adsorbent. According to the preparation method, a material for absorbing heavy metals in polluted water is prepared by fully using a field weed leersia hexandra, and the material has a good adsorption effect on Cr (VI) in acidic, neutral and alkaline water environments. Meanwhile, the adsorption material prepared by using the method disclosed by the invention also has a good adsorption effect on heavy metals such as Cr (III), Pb, Zn, Mn, Ni and Cd.

The invention provides a method for planting suaeda salsa and extracting plant salt in low and medium manganese saline-alkali soil. The method includes the steps of selecting saline-alkali soil, processing soil, planting suaeda salsa and extracting plant salt. The step of processing soil includes the substep of planting pokeberry roots and leersia hexandra in an interplanting mode according to the interplanting proportion of 6 to 4 and the planting density of 45 cm *45 cm. The manganese content of plant salt prepared through the method is 1.2-2.0 mg / Kg; the problem that the manganese content in plant salt extracted from suaeda salsa planted in low and medium manganese saline-alkali soil is too high is solved.

The invention discloses a method for improving the phytoremediation efficiency of chromium contaminated soil. The method achieves the purpose of improving the phytoremediation efficiency by using Leersia hexandra as a hyperaccumulator and diluted cane molasses (1000-10000 folds) as a chromium activator. Activation test, hydroponic test and potting test with the cane molasses as the activator provethat molasses can effectively activate the insoluble chromium in the soil, and the exogenous addition of the molasses facilitates the absorption of hexavalent chromium by the roots of the Leersia hexandra, and also facilitates the transportation of chromium to the overground part in plants. The molasses used as the activator provides an economical and effective way for improving the phytoremediation efficiency of the soil contaminated with chromium especially hexavalent chromium.

The invention provides a method for purifying chromium in water by utilizing interaction between bacillus cereus and leersia hexandra Swartz, and belongs to the technical field of water pollution treatment. The method comprises the following steps: 1) placing the leersia hexandra Swartz in a culture solution for culture for 12 to 18 d, and then adding hexavalent chromium with a final concentration of 8-12 mg / L to the culture solution for stress culture for 8-12 d to obtain pre-cultured leersia hexandra Swartz; 2) placing the pre-cultured leersia hexandra Swartz in chromium-containing wastewater with the initial concentration of hexavalent chromium of 8-12 mg / L, and inoculating a mixture with the bacillus cereus in a logarithmic growth phase to form a combined treatment system to treat the chromium-containing wastewater. According to the method, the synergistic effect of the bacillus cereus and the leersia hexandra Swartz is fully exerted by controlling key physiological and ecological factors, and important theoretical reference and practical guidance are provided for the improvement of the plant-microbial remediation efficiency of Cr(VI)-polluted water.

The invention relates to a weeding composition containing fluoropyribenzoxim and triafamone. Effective components of the weeding composition are fluoropyribenzoxim and triafamone. The weeding composition disclosed by the invention has a synergistic interaction response to target weeds, is suitable for preventing and removing annual weeds in rice fields, and is particularly suitable for preventing and removing the annual weeds in the rice fields which take ludwigia prostrate, paspalum paspaloides and Leersia hexandra as dominant weeds.

The invention discloses a method for cutting propagation of Leersia hexandra Swartz. The method comprises the following steps of: (1) culturing the Leersia hexandra Swartz in an improved hoagland culture solution for 2 to 3 weeks at room temperature; (2) selecting garden soil, river sand, turf, turf + river sand + pearlite + vermiculite, or tap water + nutrient solution as a cutting matrix, and controlling the environmental temperature to be between 20 and 33 DEG C, wherein the mass ratio of the turf to the river sand to the pearlite to the vermiculite in the turf + river sand + pearlite + vermiculite is 40:20:1:1, the mass ratio of the tap water to the nutrient solution in the tap water + nutrient solution is 100:1, and the nutrient solution is a commercially available nutrient solution, namely 'King of green leaves' special for hydroponic plants; and (3) shearing un-aged stems of the Leersia hexandra Swartz cultured in the step (1) as cutting slips, soaking 1 / 2 of each Leersia hexandra Swartz cutting slip in the tap water for 5 seconds, then cutting the slip in the matrix in the step (2), and keeping the matrix to be moist, wherein each cutting slip comprises 1 to 2 nodes, the node end is 2 to 3cm in length, and an incision is chamfered. The method is simple and quick, easy to operate and low in cost.

The invention discloses a weed killing composition containing clomazone, pendimethalin and mesotrione. The weed killing composition is prepared from the following effective components of clomazone, pendimethalin and mesotrione, wherein the weight ratio of the clomazone, the pendimethalin and the mesotrione is (1-50):(1-50):1, and the total weight percentage of the clomazone, the pendimethalin and the mesotrione in the composition is 1 to 45 percent. The weed killing composition has very good synergistic interaction on prevention and removal of rice paddy worst weed Leersia hexandra, the difficulty of prevention and removal of Leersia hexandra is solved, pesticide using amount is reduced, the pollution to environment is released, the safety on rice is high, and the composition is the novel excellent weed killing composition which prevents and removes rice annual weeds and worst weed Leersiahexandra.

The invention discloses a rapid propagation method for Leersia hexandra Swartz, which includes: selecting a plant of Leersia hexandra Swartz with a plurality of joints, cutting a stem tip at the second joint of the Leersia hexandra Swartz, reserving a 1.0-1.5cm stem at the tail end of the second joint, using a blade to peripherally damage epidermis of the joint to expose a forming layer; soaking the tail joint of the plant of Leersia hexandra Swartz in naphthylacetic acid solution 5mg / L and allowing to stand in a dark artificial climate box, cleaning the naphthylacetic acid solution at the tail end of the plant of Leersia hexandra Swartz with distilled water after six hours, and cultivating the plant in modified Hoagland nutrient solution, wherein the cultivating environment includes illumination intensity 2000LX, relative humidity 70-80%, day time 15h / d with temperature 25 + / -1 DEG C, and night time 9h / d with temperature 20+ / -1 DEG C; cultivating for 7-10 days to allow the joint to root and sprout, transplanting the rooted plant of Leersia hexandra Swartz to soil, cultivating in the natural environment, and watering to maintain a seedling substrate moist. The rapid propagation method is simple, rapid and low in cost, and a new way of obtaining restorative materials for plants in chromium polluted soil or water is provided.

The invention relates to the technical field of soil remediation, in particular to a method for remedying heavy metal Cu contaminated soil. Heavy metal Cu in the soil is removed in a plant remediation mode by adding a chelating agent EDTA and plant hormones IAA. Treatment with the IAA and the EDTA can remarkably prompt growth and development of plants, effectively relieve the stress effect of Cu in soil to the plants, and remarkably increase the Cu content of the overground parts of the plants, specifically, the Cu content is increased by 29.47% averagely compared with check treatment, and therefore, as exogenous additives, the IAA and the EDTA can effectively improve the efficiency of remediation of Leersia hexandra to the Cu contaminated soil.

The invention provides a method for planting suaeda salsa in medium-low-chromium-content saline-alkali lands and extracting plant salt. The method includes selecting the saline-alkali lands; improving soil; planting leersia hexandra and dayflower; planting the suaeda salsa; extracting the plant salt. The leersia hexandra and the dayflower are planted in an interplantation manner, the interplantation proportion of the leersia hexandra to the dayflower is 4:3, and the planting density is 30cm*30cm. The method has the advantages that the content of chromium in the plant salt prepared by the aid of the method is 0.18-0.28mg / Kg; the content of sodium chloride in the plant salt prepared by the aid of the method is 31.2-34.8%; the content of amino acid in the plant salt prepared by the aid of the method is 15.6-21.6%.

The invention discloses a preparing method for a NaOH solution modified leersia hexandra heavy metal adsorbing material. The preparing method comprises the steps that 1, leersia hexandra is collected, then flushed three times with tap water and flushed three times with ultra-pure water; 2, the obtained leersia hexandra is placed into a kraft archival bag, then placed into a blast drying box at the temperature of 80 DEG C to be dried for 24 hours, then smashed through a high-speed pulverizer, and screened in a 50-mesh mode after being smashed; 3, 50mL of absolute ethyl alcohol, 25mL of a NaOH solution with concentration of 0.1-0.5 mol / L and 25mL of deionized water are mixed to prepare a modified solution; 4, 1g of the screened leersia hexandra is added into the modified solution, a shaking table is adjusted with the constant temperature of 25 DEG C and the rotating speed of 125 r / min, after the reaction is carried out for 12 hours, the deionized water is used for washing until a pH value is neutral, the product is dried in the drying box at the temperature of 60 DEG C for 24 hours after being filtered, and then the NaOH solution modified leersia hexandra heavy metal adsorbing material is obtained. The raw material source is wide, cost is low, the effect is remarkable, the operation process is simple, secondary pollution is avoided in the adsorption process, adsorbed Cu2+ is easy to desorb, and resources can be gathered and recovered further.

The invention discloses a traditional Chinese medicine composition for treating tympanites with the syndrome of accumulation and binding of water-heat, wherein the traditional Chinese medicine composition consists of following raw materials, by weight: 12-15 parts of oriental stephania root, 12-15 parts of bredia quadrangularis, 12-15 parts of stephania tetrandra, 15-18 parts of cyclosorus dentatus, 7-10 parts of dichocarpum auriculatum, 20-25 parts of cardamine hirsute, 20-25 parts of bidens pilosa, 20-25 parts of cynoglossum amabile roots, 12-15 parts of polygonum perfoliatum, 20-25 parts of potamogeton distinctus, 12-15 parts of roots of moghania fruticulosa, 8-10 parts of asiatic striga, 8-10 parts of herba inulae, 12-15 parts of herba eupatorii, 20-25 parts of commelina communis, 4-6 parts of radix glycyrrhizae, 10-12 parts of herbal ainsliaea fragrans and 20-25 parts of leersia hexandra. The traditional Chinese medicine composition can effectively cure the tympanites with syndrome of accumulation and binding of water-heat, and is high and good in curative effects.

The invention discloses a preparation method of activated biochar loaded with zero-valent iron. The preparation method comprises the following steps: 1) washing rice straws and leersia hexandra straws with water, drying in the sun, and cutting into straw sections with the size of 1-4cm; (2) mixing the rice straw sections and the Leersia hexandra straw sections according to any proportion, adding a phosphoric acid solution, stirring at normal temperature for 22-26 hours, then cleaning with pure water, and drying; 3) putting the dried sample into a tubular furnace, heating to 500-700 DEG C at a heating rate of 3-8 DEG C / min under the protection of inert gas, and pyrolyzing for 1-2 hours; 4) cooling a sample obtained after pyrolysis, and crushing to obtain activated biochar; and 5) mixing the prepared activated biochar with zero-valent iron powder according to a mass ratio of 1: (1-2), adding the mixture into a ball milling tank, adding ball milling beads according to a ball-to-material ratio of (50-100): 1 and a ball mill rotating speed of 400-500rpm, and carrying out ball milling for 1-3 hours under a vacuum condition to obtain the zero-valent iron loaded activated biochar.

The invention discloses a method for repairing plant community structure of Alternanthera philoxeroides invasive slash in Caohai wetland, and particularly relates to the field of Caohai wetland treatment. The method is specifically a method of using native plants of economic or ecological value to replace foreign invasive plants according to the successive law of plant communities, wherein the replacement plants include native species naturally distributed in the Caohai lake, such as Scirpus tabernaemontani, Scirpus yagara, Zizania latifolia, Juncellus serotinus and Leersia hexandra. A specific method of constructing communities includes: S1, constructing plant communities in a riparian area, with Juncellus serotinus community and Leersia hexandra community subjected to grid planting; S2,constructing plant communities in a shallow water area, with Scirpus tabernaemontani community and Scirpus yagara community subjected to belt planting; ad S3, constructing a plant community in a deepwater area, with Zizania latifolia community subjected to belt planting. According to the method, different plants are planted in water areas with different depths, the invasion of Alternanthera philoxeroides can be effectively inhibited, the species diversity of wetland plant communities is restored, and the stability of the wetland ecosystem and the ecological safety of the Caohai wetland are guaranteed.

The invention discloses a water ecological restoration system and method for a shallow water area. The water ecological restoration method comprises the following steps: defining a water and land boundary within a water depth range of 0-0.5 m as a planting area; the planting area comprises an emergent aquatic plant or hygrophyte system which is planted along one side of the land and has small plants, and a submerged plant system which is planted along one side of the water area. The small emergent aquatic plant or hygrophyte system planted along one side of the land comprises one or more of myriophyllum elatinoides, hydrocotyle verticillata, cress, alternanthera philoxeroides, polygonum hydropiper, ottelia alismoides, rhizoma alismatis, leersia hexandra and aponogeton lanokenensis; and the submerged plant system planted along one side of the water area comprises one or more of ponceai, marina, marina and nutria. The defect that in general water ecological restoration, the shallow water area is prone to alopecia areata can be overcome, the water quality of the shallow water area can be purified, the coverage degree of aquatic plants in the shallow water area is remarkably improved, and the shallow water area underwater grassland is formed.

The invention relates to a method for treating chromium-containing wastewater with low concentration through Leersia hexandra Swartz cultivation and belongs to the field of wastewater treatment. According to the method, Leersia hexandra Swartz seedlings are utilized to absorb ferrous ions, hexavalent chromium is firstly reduced into trivalent chromium by the aid of the ferrous ions, water molecules around chromium ions are adsorbed by hydrophilic carboxyl in cultivating soil, the chromium ions are enabled to be exposed, finally, the exposed chromium ions are adsorbed and enriched through photosynthesis of Leersia hexandra Swartz and by root hair and stems of the Leersia hexandra Swartz, and accordingly, the purpose of chromium-containing wastewater treatment is achieved; the method for treating the chromium-containing wastewater adopts a simple treatment process and available raw materials, has high removal rate of the chromium-containing wastewater with low concentration, produces no secondary pollution and has broad application prospect.

The invention discloses a preparation method and application of Leersia hexandra swartz endophytic bacteria with a hexavalent chromium reducing function. The strain has the classification naming of Enterobacter cloacae, and is collected in CGMCC (China General Microbiological Culture Collection Center) with the address of NO.3, NO.1 Yard, Beichen West Road, Chaoyang District, Beijing, 100101. Thecollection number is CGMCC NO.14265. The Leersia hexandra swartz endophytic bacteria are separated and screened from the root tissues of the chromium super accumulation plants of Leersia hexandra swartz, are identified as Enterobacter cloacae, and are named as G04. The strain can reduce hexavalent chromium into trivalent chromium; the chromium reducing conditions are cleared; the strain resource and the theoretical basis are provided for hexavalent chromium pollution microbial remediation.

The invention discloses a traditional Chinese medicinal preparation for treating Meniere's disease and a preparation method thereof, belonging to the field of traditional Chinese medicine. The traditional Chinese medicinal preparation comprises the following effective components: Cryptotympana pustulata slough, Radix Polygalae (Polygala tenuifolia and / or Polygala sibirica), Cornus officinalis, Semen Cassiae (Cassia obtusifolia and / or Cassia tora), Aeschynomene indica root, Polygonatum odoratum, Aristolochia cathcartii, Fructus Amomi Rotundus (Amomum kravanh and / or Amomum compactum), Leersia hexandra, Micromeria biflora, Akebia quinata, Lycoris radiata, Ziziphus jujuba (Semen Ziziphi Spinosae), Angelica dahurica, Perilla frutescens and Acorus calamus. The traditional Chinese medicinal preparation of the invention has reasonable formulation which meets the theory of traditional traditional Chinese medicine and modern medicine research, has effects of suppressing hyperactive liver for calming endogenous wind, promoting the circulation of qi and relieving stagnation, can treat different symptoms of Meniere's disease, can thoroughly cure Meniere's disease, and has the advantages of no recurrence, good safety and no adverse effects, and fills in the blank of Meniere's disease drugs.

The invention discloses a bamboo charcoal-photosynthetic bacteria-constructed wetland integrated sewage treatment system. The treatment system comprises a zeolite area and an adsorption treatment system which are detachably connected; the adsorption treatment system comprises a first chamber and a second chamber which communicate with each other; the zeolite area communicates with the first chamber; and each of the first chamber and the second chamber is sequentially provided with leersia hexandra, an organic matter adsorption layer, a common adsorption layer and a substrate layer from top to bottom. The Leersia hexandra is used as an aquatic plant in a constructed wetland system, the Leersia hexandra is matched with modified bamboo charcoal loaded with photosynthetic bacteria, and a microbial battery is formed by the modified bamboo charcoal adsorbing the photosynthetic bacteria and the bamboo charcoal, so that toxic and harmful components in wastewater can be effectively removed, the sewage treatment time is shortened, the purpose of purifying wastewater is effectively achieved, meanwhile, the compound system can be separated according to actual conditions, and each part can be independently applied to different conditions for sewage treatment.

The invention discloses a method for preparing washing-agent or soap-powder modification leersia hexandra heavy metal ion adsorbents. The method includes the steps that 1, leersia hexandra is collected, washed through tap water three times and then washed through ultrapure water three times; 2, the obtained leersia hexandra is placed into kraft archival bags to be placed into a 80-DEG-C air blowing drying box to be dried for 24 hours, and then the leersia hexandra is smashed through a high-speed smashing machine to pass through a 50-mesh sieve; 3, 0.5 g of washing agents or 0.5 g of soap powder and 100 ml of deionized water are mixed to obtain a modifying solution; 4, 1 g of the sieved leersia hexandra is added into the obtained modifying solution, a shaking table is adjusted to achieve the conditions of the constant temperature of 25 DEG C and the rotating speed of 125 r / min, after the reaction is carried out for 12 hours, the mixture is washed through deionized water till the pH is neutral, products obtained after filtering are dried in a 60-DEG-C drying box for 24 hours, and the washing-agent or soap-powder modification leersia hexandra heavy metal ion adsorbents are obtained. According to the method, raw material sources are wide, cost is low, the effect is remarkable, the operation process is simple, and secondary pollution can be avoided in the adsorption process; adsorbed Cu2+ is easy to desorb, further enrichment and resource recycling can be achieved, and cycle utilization of resources is achieved.

The invention discloses a method for preparing a sulfuric acid modified Leersia hexandra heavy metal biological absorbent material. The method comprises: (1) washing Leersia hexandra leaves with tap water for 3 times, and then with ultra-pure water for 3 times; (2) drying the washed Leersia hexandra leaves, grinding the dried Leersia hexandra leaves, and filtering the ground Leersia hexandra leaves by using a 100-mesh sieve; (3) putting the filtered Leersia hexandra leaves into a ceramic crucible, keeping the ceramic crucible in a 100 DEG C muffle furnace for 6 hours, and obtaining original Leersia hexandra heavy metal biological absorbent; (4) dissolving the original Leersia hexandra heavy metal biological absorbent in sulfuric acid solution with the concentration of 3 mol / L, wherein the original Leersia hexandra heavy metal biological absorbent : sulfuric acid with the concentration of 3 mol / L = 20g : 1L, and reaction is performed at 45 DEG C for 12 hours by using a water bath; (5) leaching the substance, and rinsing the leached substance with ultra-pure water till neutrality is reached; and (6) placing the rinsed substance in a 55 DEG C oven for drying until the weight remains constant. According to the invention, the field weed Leersia hexandra is fully taken advantage of for preparing the material that absorbs heavy metals that pollute waters, and the material has a good effect of absorbing Cr(VI) in acidic, neutral, or alkaline aquatic environment. Meanwhile, the material also has a good effect of absorbing heavy metals comprising: Cr (III), Pb, Zn, Mn, Ni, and Cd.

The invention discloses a traditional Chinese medicinal preparation for treating Meniere's disease and a preparation method thereof, belonging to the field of traditional Chinese medicine. The traditional Chinese medicinal preparation comprises the following effective components: Cryptotympana pustulata slough, Radix Polygalae (Polygala tenuifolia and / or Polygala sibirica), Cornus officinalis, Semen Cassiae (Cassia obtusifolia and / or Cassia tora), Aeschynomene indica root, Polygonatum odoratum, Aristolochia cathcartii, Fructus Amomi Rotundus (Amomum kravanh and / or Amomum compactum), Leersia hexandra, Micromeria biflora, Akebia quinata, Lycoris radiata, Ziziphus jujuba (Semen Ziziphi Spinosae), Angelica dahurica, Perilla frutescens and Acorus calamus. The traditional Chinese medicinal preparation of the invention has reasonable formulation which meets the theory of traditional traditional Chinese medicine and modern medicine research, has effects of suppressing hyperactive liver for calming endogenous wind, promoting the circulation of qi and relieving stagnation, can treat different symptoms of Meniere's disease, can thoroughly cure Meniere's disease, and has the advantages of no recurrence, good safety and no adverse effects, and fills in the blank of Meniere's disease drugs.

The invention discloses a method for the plant arrangement of a vertical flow and horizontal subsurface flow combined artificial wetland. By adopting the method, good landscape effect and good sewage treatment effect are obtained. The horizontal subsurface flow wetland pool of the vertical flow and horizontal subsurface flow combined artificial wetland can be used for planting any one or more of the following plants: reeds, Cannan indiea, myrtles, ciliate desert grass, pokeberry, Leersia hexandra, Cyperusalternifolius and Indian mustard plants; the vertical flow wetland pool of the vertical flow and horizontal subsurface flow combined artificial wetland can be used for planting any one or more of the following plants: Juncus bufonius, willow herb, Sedum alfredii Hance, Thlaspi caerulescens, ryegrass, myrtle, ciliate desert grass, pokeberry, Leersia hexandra, Cyperusalternifolius and Indian mustard plants; the ratio of the number of plants of the vertical flow wetland pool to the number of plants of the horizontal subsurface flow wetland pool is 1:1.5-2, and after water is impounded, floating plants such as water lily and / or water hyacinth are planted on the water surface of the vertical flow wetland pool. The invention has the advantages of low cost, high treatment efficiency, easy growth and good landscape effect.