Improved drug and application method thereof
An application method and medicament technology, applied in the field of soil pollution remediation and improvement, can solve problems such as passivation and remediation of heavy metal compound polluted soil that are difficult to meet, and achieve good passivation effect, increase total porosity, and reduce soil bulk density.
Inactive Publication Date: 2019-07-23
ELION RESOURCE GROUP
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Problems solved by technology
[0003] Patent CN108624325A discloses "a conditioner for passivating heavy metal-contaminated paddy soil and its application" and uses cow dung biochar and calcium-magnesium phosphate fertilizer to prepare the conditioner. The preparation method of passivating agent" uses rice husk charcoal, straw, and fly ash to prepare the passivating agent. The above-mentioned patent is effective for a single heavy metal, but it is difficult to meet the passivation repair of multiple heavy metal-contaminated soils.
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[0072] In the preparation process of biochar, there is a first heating stage and a second heating stage. The setting of the two heating stages can increase the residence time of biochar thermal cracking in the low temperature area, and promote the cracking reaction of cellulose and lignin. It can better maintain the porous structure of biochar.
[0073] The phosphate rock powder in the improved medicament of the present application can not only provide lasting fertilization effect for the soil, but also can fix Pb in the soil through various mechanisms such as precipitation (co-precipitation) and adsorption, and simultaneously act on Cd, Cu and Zn in the soil. Such heavy metals also have a certain immobilizing effect.
[0074] The desulfurization gypsum in the improvement agent of the present application is applied to acidic soil, which can effectively improve the pH value of the soil, and the Al in the soil 3+ The toxicity brought by such heavy metal ions has a good alleviat...
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Abstract
The invention provides an improved drug and an application method thereof. The improved drug comprises the following components in parts by weight: 20-50 parts of charcoal, 25-45 parts of powdered rock phosphate and 15-40 parts of desulphurization gypsum. The application method of the improved drug comprises the following steps: a) uniformly mixing the improved drug with to-be-remediated soil; b)inactivating under a room temperature for not less than 21 days. The improved drug provided by the invention has an excellent inactivating effect to soil heavy mental, is capable of effectively reducing toxicity of heavy metals in soil and is suitable for remediation of soil contaminated by a single heavy metal as well as soil contaminated by multiple heavy metals. The application method is simple, low in material cost, effective, economical and environmentally friendly, and has an important practical value.
Description
technical field [0001] This application relates to the technical field of soil pollution remediation and improvement, in particular to an improvement agent and its application method. Background technique [0002] Over the past 30 years, my country's rapid economic development has brought about environmental pollution problems. Among them, soil pollution is becoming more and more serious, and its treatment is urgent. In-situ chemical passivation remediation is an important soil remediation and improvement technology. Its principle is to add various passivation materials to contaminated soil, and use adsorption, precipitation, redox, complexation and other mechanisms to change the endowment of heavy metals in the soil. The state of existence and bioavailability, so that it can be converted into components that are difficult to migrate and absorb by plants, so as to realize the restoration and improvement of contaminated soil. This technology can not only effectively solve the...
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Login to View More IPC IPC(8): C09K17/04B09C1/08
CPCB09C1/08C09K17/04
Inventor 王勇魏文君李静苏贞峰张瑾
Owner ELION RESOURCE GROUP