138 results about "Hyperaccumulator" patented technology

The invention relates to a method of plant recovering and agriculture safe utilization for cadmium-polluted vegetable field soil, in particular to a method of producing while repairing for a cadmium-polluted vegetable field. The method comprises planting green Chinese onions with low cadmium accumulation and cadmium-hyperaccumulator plants of nightshade in an intercropping mode on the cadmium-polluted soil, and after the green Chinese onions with low cadmium accumulation and the cadmium-hyperaccumulator plants of nightshade are fully grown, respectively removing the entire plants from the cadmium-polluted soil so as to achieve the aim of removing a pollutant of cadmium in the soil and simultaneously harvesting the green Chinese onions with low cadmium accumulation to serve as pollution-free vegetables. The harvested green Chinese onions meet the requirements of our country for food sanitation so as to be safely consumed. By means of the steps, a recovering and utilizing period is completed. According to the method of producing while recovering for the cadmium-polluted vegetable field, large amount of cadmium is taken away from the cadmium-polluted soil by utilizing the cadmium-hyperaccumulator plants, the polluted soil is recovered while the green Chinese onions meeting the sanitation standards of our country are produced, and the polluted soil can be safely utilized.

An underground water heavy metal pollution remediation device mainly includes a pumping system, a water distribution system, an adsorption reaction zone, a phytoremediation zone, a rapid seepage zone and a monitoring system. The adsorption reaction zone is filled with a medium for the adsorption of heavy metals in order to remove the heavy metals in the underground water. The phytoremediation zone is planted with hyperaccumulator with absorption and enrichment effects on heavy metals, so as to enhance the removal effect of heavy metals. The technique organically combines physical adsorption, chemical adsorption and phytoremediation, and can remediate heavy metals pollution of As, Zn, Cd, Mn, Cu, Cr and Pb and reach good removal effect; replacement of the adsorption reaction medium filler is simple; and the device has low operation cost, and is applicable to groundwater pollution sites in different water depths.

A method of sustaining plant growth in toxic substrates polluted with heavy metal elements comprising amendment and remediation of the toxic substrates with an organo-zeolitic mixture. Vegetation, such as hyperaccumulator plants or native plants and grasses for in situ remediation, will now grow. The method can also be used as a fertilizer and for benefication of normal, uncontaminated soils.

The invention relates to phytoremediation of environment pollution, in particular to a reinforcing repairing agent of a hyperaccumulator nightshade, which comprises the following components of glycine, glutamic acid and cysteine that have a mol ratio of 0.1-1.0:0.1-1.0:0.1-1.0. In cadmium-polycyclic aromatic hydrocarbon combined pollution pot culture soil in which the hyperaccumulator nightshade is transplanted, the glycine, the glutamic acid and the cysteine are mixed and poured in the soil in a form of a water mixture according to the content of 0.1-1.0mmol/kg every 15 days for 3 times; and when the hyperaccumulator nightshade grows up, the hyperaccumulator nightshade and the soil sample are harvested. Compared with the reinforcing repairing agent without being added with amino acid, low quantity of the mixture of the glycine, the glutamic acid and the cysteine has the best treatment effect, the Cd content of the upper part of the nightshade soil is increased by 2.26 times, and the removal rate of the total amount of polycyclic aromatic hydrocarbon in the soil reaches 34.5 percent, thus the repairing efficiency of the Cd and the polycyclic aromatic hydrocarbon by the nightshade are remarkably improved.

The invention discloses a method for preparing a photocatalytic material from a cadmium hyperaccumulator and application. A cadmium-enriched hyperaccumulator harvested product is converted into a carbon loaded cadmium sulfate photocatalytic material with the small forbidden band width and efficient photocatalytic activity, full-dose recycling and high-value recycling of the cadmium hyperaccumulator can be achieved, the problems of high cost and secondary environment contamination for cadmium contaminated site plant repairing are solved, and application and popularization of the cadmium hyperaccumulator in soil contamination repairing are promoted.

The invention relates to technology for synchronous restoration and production of vegetable field soil combinedly polluted by cadmium and polycyclic aromatic hydrocarbon. The technology comprises the following steps of: 1) planting cadmium hyperaccumulator solanum nigrum L in the vegetable field which is combinedly polluted by the cadmium and the polycyclic aromatic hydrocarbon in spring in a mode of furrow drilling and row planting, harvesting the solanum nigrum L when the solanum nigrum L grows for 63 to 67 days and bears fruits, and applying glycine, glutamic acid and cysteine about one month before the solanum nigrum L is harvested; 2) pulling the solanum nigrum L with roots out after the solanum nigrum L is harvested, and then planting cadmium low accumulation cabbage navy camps 91-12, wherein the row space and the plant space are 50cm respectively; harvesting the cabbage after the cabbage grows for about 80 days; and completing the steps in a restoring and using cycle. By the technology, a great amount of cadmium is taken away from the soil combinedly polluted by the cadmium and polycyclic aromatic hydrocarbon by using the hyperaccumulator, the polycyclic aromatic hydrocarbon in the soil is obviously reduced, the cabbages meeting Chinese health standards can be produced, and the polluted soil can be safely used when the polluted soil is restored.

The invention discloses hyperaccumulator-based biochar, and a preparation method and an application thereof. The preparation method of the hyperaccumulator-based biochar comprises the following steps:natural air drying, crushing and anaerobic pyrolysis. The hyperaccumulator-based biochar is prepared by the preparation method. The application is the application of the hyperaccumulator-based biochar in adsorption and solidification of heavy metal ions. A Hyperaccumulator is subjected to anaerobic pyrolysis to prepare the biochar, so that heavy metals in the hyperaccumulator are harmless, and the hyperaccumulator is reutilized; and the hyperaccumulator-based biochar can be used for solidifying and adsorbing heavy metal ions, has the advantages of greenness, energy saving and environmental friendliness, and has a very wide market application prospect.

The invention belongs to the technical field of soil protection, in particular to a remediation method for heavy metal pollution of farmland soil. A heavy metal passivator is uniformly mixed with soil, after conservation, the first crop is planted, and then hyperaccumulators are planted, at that same time, a heavy metal activator is applied and the passivator is applied, after the second crop is planted, the heavy metal passivator is applied at first, so as to reduce the risk of heavy metal leaching, at that same time, heavy metals are avoided to be enriched in crops, and then the heavy metalactivator is applied to plant hyperaccumulators to absorb heavy metals and reduce the content of heavy metals in the soil, and the heavy metals in the soil not covered by the plant roots are kept at alow leaching risk due to the existence of heavy metal passivators. The invention adopts a plant enrichment technology and a method of applying a heavy metal passivator, which can not only fundamentally remove the problem of heavy metals, but also passivate the heavy metals when planting crops, thereby improving the use efficiency of the soil.

The invention relates to recovering metals, such as nickel and cobalt, by phytomining or phytoextracting soils rich in metals wherein the desired metal is selectively accumulated in hyperaccumulator plants by adjusting the soil pH. The metals are ultimately recovered from above-ground plant tissues at economically acceptable levels without further contaminating the metal-containing sites. The invention also relates to metal-hyperaccumulating plants.

A scalable, modular water filtration and re-capture system is disclosed, such as for use as a high performance bioswale, or other purposes. The system includes a filter container with a removable cartridge that contains a filter media soil and planted vegetation, which may be for example one or more hyperaccumulators. The filter container is stacked together with a cistern container and in fluid communication therebetween to form a stacked container pair as a water filter and capture module. This allows for efficient servicing and removability of the filter cartridge, such as in bioswale, below ground, or above ground configurations. Water inflows and outflows may be circulated for varieties of reclamation uses, or treated water may simply be stored or conveyed into the ground. Multiple such modules may be secured together in custom scalable configurations to meet various needs and intended uses for water volumes, available space or terrain, or specific water treatment needs. In some embodiments, a single individual can replace the cartridges as needed.

The invention relates to a phytoremediation technology of cadmium-polycyclic aromatic hydrocarbon composite contaminated soils, and in particular relates to a mixed reinforcer for reinforcing repair of nightshade on composite contaminated soils and an application thereof. The reinforcer is composed of the following components of EGTA (ethylene glycol tetraacetic acid), citric acid and salicylic acid with the molar ratio of (0.1-1.0): (0.5-5.0): (0.1-1.0). The reinforcer is added into heavy metal-polycyclic aromatic hydrocarbon composite contaminated soils planted with hyperaccumulators and/ or accumulators. The citric acid and the salicylic acid are mixed to be dissolved into water to serve as the reinforcer; then, the reinforcer is applied in the heavy metal-polycyclic aromatic hydrocarbon composite contaminated soils planted with hyperaccumulators and/or accumulators, especially contaminated soils planted with nightshade; when the nightshade is mature, plants and soil samples are collected and are compared with those in which the reinforcer is not applied; the result shows that the processing effect is better if the reinforcer is applied, and the upper Cd extraction ratio of the nightshade is improved by 42.6%; and meanwhile, the removal rate of the polycyclic aromatic hydrocarbon of the soils can reach 25.3%, and the repair efficiency is obviously improved.

The invention provides an endophyte for promoting the growth of plants and the remediation of heavy metal-contaminated soil and application thereof. Bacterial liquid of endophyte SLS18 is utilized to dip-dye Sorghum bicolor L. in a mode of seed bacteria dipping to colonize the endophyte SLS18 into the Sorghum bicolor L. to accompany each stage of the growth of the Sorghum bicolor L., so that the growth of the Sorghum bicolor L. on heavy metal-contaminated marginal land and the remediation of soil are promoted. The endophyte SLS18 is separated from the stem of a hyperaccumulator, namely pokeberry root, is obtained through screening, and is an endophyte which can be successfully colonized in the Sorghum bicolor L., has a remarkable effect of promoting the growth of the Sorghum bicolor L. and has the heavy metal resistance. A method is easy to operate, and is safe and economic, no new pollution is introduced into soil environment, heavy metal-contaminated marginal land resources can be effectively utilized so as to avoid the rival of energy crops and food crops against finite cultivated land, and heavy metal-contaminated land can also be effectively remediated.

The invention relates to a planting method of low-aluminum zinc-containing rich-selenium health care tea in a hilly red soil region. The method comprises the following steps that: mixing agents of zinc vitriol, sodium selenite, ammonium nitrate and monosodium phosphate are added into soil external sources according to the major trace element content of red soil and the growth characteristics of tea trees, and then, zinc and selenium annual hyperaccumulators are utilized for relay intercropping after the spring tea picking completion. The planting method has the technical effects that the relay intercropping is carried out, the enriching of the zinc and the selenium in a tea garden is effectively controlled, and the continuous utilization of the soil and the ecological safety of the tea garden are ensured. The zinc content and the selenium content in the tea respectively reach a value higher than 1mg/g and a value higher than 0.3mg/kg, the contents of the organic zinc and the organic selenium are respectively higher than 80 percent, and other qualities of the tea are not obviously changed.

The invention relates to the technical field of phytoremediation of heavy metal contaminated environment, in particular to a method for repairing heavy metal contaminated soil or water body by utilizing hyperaccumulator polymerization. The method disclosed by the invention has the advantages of being capable of removing multiple pollutants, being low in cost, good in effect and strong in operability, and being capable of avoiding damage to the basic structure and functions of the water body or soil, avoiding secondary pollution, preserving water and soil and beautifying environment at the same time, and can be popularized and applied in a large scale. According to the technical scheme adopted by the invention, symphytum officinale is planted in the soil or water body polluted by cadmium, copper, lead and zinc, and when the symphytum officinale grows to a mature period, the overground part or the whole plant is harvested and is removed from the polluted soil or water body, and then the processes of planting and harvesting and removing the symphytum officinale can be repeated in the soil or water body polluted by cadmium, copper, lead and zinc, until the contents of cadmium, copper, lead and zinc in the soil or water body reach environmental quality standards.

The invention discloses a phytoextraction repairing method for heavy metal cadmium contaminated calcicolous farmland soil, and belongs to the technical field of phytoremediation for contaminated soil. The phytoextraction repairing method for the heavy metal cadmium contaminated calcicolous farmland soil particularly comprises the following steps that S1, hyperaccumulators of which the enrichment coefficient and transfer coefficient meet the standards are planted in the heavy metal cadmium contaminated calcicolous farmland soil; S2, a chelating agent is added to improve biological effectiveness of heavy metals; S3, growth conditions of plants are periodically observed; and S4, sampling is conducted on the plants, and the content of metal chromium at different positions of the plants is analyzed. The phytoextraction repairing method for the heavy metal cadmium contaminated calcicolous farmland soil belongs to an in-situ remediation technology, disturbance to the environment is small, landscape ecology cannot be destroyed, the environment can be greened, operation is easy, and the phytoextraction repairing method has a wide application prospect in environmental protection. According to the phytoextraction repairing method, soil fertility and ecological structure cannot be destroyed in the soil repairing process, and other crops can be planted without secondary treatment.

The invention relates to an organic fertilizer for modifying the plow layer of a low-yield land and repairing heavy metal plants. For the modification of the plow layer (0-35 cm deep) of the low-yield land, the soil should comprise 30% of organic matters, 6% of inorganic nutrients, 5% of calcium (including chelated calcium, complexed calcium and and ionized calcium), 10% of silicon, and 0.5% of magnesium, zinc, manganese, molybdenum, selenium and on the like by weight percent. For the repair of the heavy metal plants in the plow layer of the soil, the following types of plants are involved: cadmium absorption accumulator plants: Pteris VittataL., Pteris CreticaL., Sedum Olfre diiL., and Phyto Cacca atinosa ROXL.; cadmium hyperaccumulator plants: Vio la booshanensis and Solanym nigrumL.; chromium absorption accumulator plants: Digitaria Sanguinnalis; arsenic hyperaccumulator plants: ciliate desert-grass lead accumulator plant: E.Canadensis; nickel accumulator plant: taraxacum officimale.

The invention discloses a remediation method for heavy metal polluted soil. The method comprises the following steps: (1) adding a magnetotactic bacteria liquid culture medium to the heavy metal polluted soil; inoculating magnetotactic bacteria; and turning over; (2) adding the magnetotactic bacteria liquid culture medium to the heavy metal polluted soil; and arranging a magnetic field; (3) collecting the surface layer of the heavy metal polluted soil; (4) showering the collected heavy metal polluted soil; (5) spreading a soil conditioning agent on the surface of the heavy metal polluted soil;(6) planting heavy metal hyperaccumulators in the heavy metal polluted soil; (7) spraying a heavy metal blocking agent after the hyperaccumulator seeds are formed; and (8) cycling the steps (1) to (7) twice or three times. The method has the advantages of being low in planting difficulty, easy to manage, applicable to remediating of wide-range polluted soil, small in environmental disturbance, and good in soil treatment effect; and moreover, the environment is beautified while the polluted soil is treated; and the popularization is high.

The invention relates to recovering metals, such as nickel and cobalt, by phytomining or phytoextracting soils rich in metals wherein the desired metal is selectively accumulated in hyperaccumulator plants by adjusting the soil pH. The metals are ultimately recovered from above-ground plant tissues at economically acceptable levels without further contaminating the metal-containing sites. The invention also relates to metal-hyperaccumulating plants.

A method for remediating soil which is contaminated by an individual or a mixture of Cd and Pb with a hyperaccumulator Emilia sonchifolia L. includes steps of: planting seeds or seedlings of Emilia sonchifolia L. in soil which is contaminated by an individual or a mixture of Cd and Pb; watering regularly to maintain the soil moist; after Emilia sonchifolia L. flowers or completely matures, removing all of or an aboveground part of the plant from a contaminated spot of the soil and disposing the removed plant properly; repeating the above steps until a Cd and Pb content of the soil fall within an environmental security standard. Besides being adaptable and widely available, the Emilia sonchifolia L. is both a Cd hyperaccumulator and a Pb hyperaccumulator by respectively satisfying four indexes of the Cd hyperaccumulator and the Pb hyperaccumulator.

The invention relates to a technology for repairing heavy metal polluted soil, and in particular relates to a method for repairing heavy metal polluted soil by using radix achyranthis bidentatae as a manganese hyperaccumulator. The radix achyranthis bidentatae belongs to a renascent herb, and found by field investigation, the radix achyranthis bidentatae has strong tolerance and enrichment capacity on manganese. Indoor culture experiments prove that the radix achyranthis bidentatae is planted in manganese polluted soil, absorbs manganese from the soil by roots, and transports the manganese to an overground part for accumulation; and when growing to maturity, the radix achyranthis bidentatae is harvested and duly handled, thus the purpose of removing excessive manganese from the soil is achieved. Through a mode of continuously planting the radix achyranthis bidentatae on the manganese polluted soil and continually harvesting the radix achyranthis bidentatae, the manganese in the polluted soil is continuously extracted until the content of the manganese in the soil reaches the standard of environmental safety. The method is used for repairing the manganese polluted soil, and is a green and safe polluted soil treatment method.

The invention discloses an adsorbent based on photosynthetic spore bacterium treatment of soil heavy metals, and a preparation method thereof. The preparation method of the adsorbent comprises the following steps: preparing a composite powder, preparing a bacterium culture solution, preparing a photosynthetic bacterium culture solution, preparing a spore bacterium culture solution, and culturing photosynthetic bacteria. The photosynthetic bacteria and the spore bacteria promote the growth of hyperaccumulators, enrich microbial florae, promote the root expansion depth, improve the selectivity to heavy metals, inhibit the transshipment trend of the heavy metals from the root to the aboveground part, shorten the repairing time and accelerate the repairing efficiency. The heavy metal ion enrichment ability of the photosynthetic bacteria and the spore bacteria and the heavy metal ion adsorption and removal ability of zeolite, vermiculite and agriculture and forestry waste active carbon arecombined to make the heavy metal ions adsorbed into the adsorbent, solidify the soil heavy metal ions and transform the heavy metal ions into a low-toxicity form, so the soil heavy metal ions are effectively adsorbed, and the influence of plant cell metabolism disorder caused by the heavy metals on normal growth of the plants is reduced.