9results about How to "Reduced bioavailability" patented technology

The invention relates to the technical field of soil improvement and ecological restoration, and discloses a liquorice planting method based on synergistic utilization of coal-based solid waste and desertified land, which comprises the following steps: crushing alkaline coal-based solid waste and acidic coal-based solid waste, mixing according to a mass ratio of 2: 8-4: 6, adding a modified humic acid-based heavy metal passivator and water, and uniformly mixing to obtain a mixture; uniformly mixing and aging to obtain a coal-based solid waste mixture; spreading the mixture on the surface layer of the desertification land, performing rotary tillage and deep tillage to mix the mixture with the sandy soil, and adjusting the pH value to be stable at 7.5-8.5; the treated liquorice seeds are sown, main roots are harvested in autumn of the third year, deep root systems and lateral root bud points are reserved, and overground straw is smashed and returned to the field; soil nutrition indexes are monitored regularly, other commercial crops are planted when the soil nutrition indexes reach a set threshold value, and if not, regeneration planting of the liquorice is maintained. Through synergistic compounding of acid-base solid waste and chelating of the passivating agent, substrate pH self-regulation and heavy metal resistance control are achieved, and the physicochemical property of sandy soil is improved.

The invention belongs to the technical field of heavy metal pollution treatment, and discloses a method for reducing soil cadmium activity and wheat grain cadmium content. According to the method, the low-cadmium-accumulation wheat variety is selected, the composite conditioner is applied, the low-cadmium-accumulation wheat variety is Jimai 22, and the composite conditioner is composed of mineral source potassium fulvate and zinc fertilizer. The complex passivation effect of humic acid components in mineral source potassium fulvate on soil heavy metal is utilized, the ion antagonism effect of zinc and cadmium and the low cadmium accumulation characteristic of Jimai 22 are combined, the cadmium content of wheat grains is synergistically reduced to 0.1 mg / kg or below, meanwhile, the cadmium content of the soil can be remarkably reduced, and the soil with cadmium exceeding the standard can be repaired. The treatment method provided by the invention has the advantages of simple operation, easily available raw materials, low cost, stable synergistic cadmium reduction effect and the like.

The application provides a kind of eye drop composition and its preparation method and application, belong to ophthalmic preparation technical field.The eye drop composition used in the application includes the following components: brimonidine tartrate, hyaluronic acid, collagen, trehalose, injection water;By compounding each component, a kind of eye drop capable of realizing brimonidine tartrate sustained release, prolonging the time of antihypertensive effect, and having the characteristics of reducing blinking discomfort, long-acting moisturizing, anti-inflammatory soothing, mild antiseptic, etc. is prepared;The eye drop of the application is helpful to glaucoma, high eye pressure, dry eye, postoperative inflammation or allergy, preservative-sensitive or preservative-allergic population, improves the quality of life, relieves the disease.

The present application belongs to the field of soil remediation, and particularly relates to a method for remediation of cadmium contaminated soil. The specific technical scheme is as follows: a soil remediation method comprises the following steps: before planting economic crops, applying sulfate-reducing bacteria to the soil to be remediated; after harvesting the economic crops, planting cadmium extraction crops in the soil to be remediated. The present application provides a water-flood rotation soil remediation method which can produce while remediation. On the one hand, the biological passivation can reduce the biological availability of cadmium in the soil, thereby reducing the stress of cadmium on plants and the absorption and accumulation of cadmium by plants; on the other hand, the biological technology can strengthen the ability of nightshade to extract cadmium, thereby extracting cadmium in farmland soil.

The invention discloses application of baicalin in relieving copper toxicity of duckweed, and belongs to the technical field of plant adversity physiology and heavy metal pollution remediation. Systematic research on the physiological regulation mechanism of baicalin on duckweed under copper stress innovatively discovers that the relative growth rate of duckweed can be remarkably increased through treatment of baicalin; according to the application, the chlorophyll synthesis level is effectively recovered, the photosynthesis inhibition effect caused by copper toxicity is fundamentally improved, it is proved that the threshold concentration for effectively relieving the copper toxicity is 400 [mu] M, the optimal action concentration window is 200-800 [mu] M, and the concentration interval can achieve synergistic antagonism on the toxicity of copper ions by adjusting the antioxidant metabolic pathway of duckweed. And a green and efficient new strategy is provided for heavy metal polluted water body remediation. The method is not only suitable for ecological restoration engineering of copper-polluted water areas, but also can be expanded and applied to cultivation of stress-resistant varieties of aquatic economic plants, and has important theoretical value and practical application prospect in improvement of heavy metal tolerance of stressed plants.

The invention discloses a method for preparing a functional biological flora in a targeted biological bacterium and host original flora coupling mode and application of the functional biological flora in ginseng, and relates to the field of agricultural microbial technology and traditional Chinese medicinal material cultivation, and the method comprises the following steps: a, constructing a targeted biological strain resource library, and screening a functional single strain; b, purifying and compounding the single strain to form a compound flora; the core of the method is in vitro pre-coupling, exogenous targeting bacteria and host original flora are subjected to symbiotic adaptation in advance in a controlled environment to form a stable micro-ecological complex, the micro-ecological complex can be rapidly colonized and establish advantages after being applied to soil, the industrial pain point that a traditional microbial agent is living but not long and long but not effective is solved, and the selected strains are scientific in combination and easy to control. The bacillus subtilis and the brevibacillus laterosporus are used for resisting diseases and promoting growth, the bacillus mucilaginosus and the pseudomonas fluorescens are used for activating nutrients and removing heavy metal toxicity, and the arbuscular mycorrhizal fungi are used for expanding the root system absorption area.

This invention provides a method and application for preparing bio-organic fertilizer through synergistic composting of biochar-containing biogas residue, belonging to the field of organic fertilizer preparation technology. The method includes: preparing biogas residue through anaerobic fermentation of livestock and poultry manure and crop straw; adding biochar and a compound microbial agent; conducting high-temperature aerobic composting; and obtaining bio-organic fertilizer through maturation and aging. The amount of biochar added is 5%-10% of the dry basis weight of the composting raw materials; the aerobic composting time is 35-45 days; and the high-temperature composting temperature is 55-65℃. The compound microbial agent includes *Bacillus steatophilus*, *Bacillus amyloliquefaciens*, and *Bacillus mucilaginosus*. The bio-organic fertilizer obtained by this invention can be used for crop soil improvement. This invention, through the synergistic effect of biogas residue, biochar, and compound microbial agent, effectively shortens the composting cycle, improves compost maturity, reduces nitrogen loss, passivates heavy metals, and significantly improves the quality of organic fertilizer.

The application discloses a kind of low permeability fluorine pollution sediment repair methods, comprising: S1, citric acid, diethylene triamine pentaacetic acid and coconut amide propyl betaine three solutions are mixed in proportion, to obtain leaching agent;S2, fluorine pollution sediment is repaired: to fluorine pollution sediment, leaching agent obtained in S1 is added, continuously stirring 1~2h in leaching stirring tank;In the process of leaching, gas is pumped from the porous disc at the bottom of leaching stirring tank using pressurized air pump, and the fluorine pollution sediment saturated with leaching is repaired using micro-bubble-leaching combined enhancement repair formed by micro-bubble;S3, the sediment after S2 repair is separated, and the leaching is completed.The application has the advantages of simple process, convenient operation, fast reaction speed, good leaching effect, easy to obtain leaching agent and micro-bubble device, and has combined enhancement effect on fluorine pollution sediment repair, and is suitable for fluorine pollution repair of low permeability sediment such as clay, silty clay and silt.

This invention discloses the application and method of green manure return to the field in the remediation of cadmium pollution in red soil, belonging to the field of agricultural heavy metal pollution remediation technology. This method addresses the problems of high cost, potential secondary pollution, and difficulty in coordinating with agricultural production associated with chemical passivating agents in the remediation of cadmium-contaminated farmland in red soil. It utilizes a crop rotation system combining continuous planting and incorporation of milkvetch with rice planting and fertilization to simultaneously regulate and significantly increase soil microbial biomass carbon and amorphous iron oxide content, synergistically driving the transformation of soil cadmium from a highly active, weakly acidic extractable state to a more stable iron-manganese oxide-bound and organically bound state. This method achieves long-term, stable reduction of soil cadmium bioavailability without the need for additional chemical passivating agents, realizing a green, low-cost, and in-situ synergistic approach to cadmium pollution remediation and agricultural production, and has significant application value.