Soil remediation agent prepared from crop straw and biochar

Abstract

The invention provides a soil remediation agent prepared from crop straw as a raw material. The crop straw is pretreated through steam explosion, so that the utilization efficiency of effective components in the crop straw is improved, the exploded straw powder is subjected to fermentation and pyrolysis activation treatment to prepare a fermentation product of the straw and biochar respectively, the fermentation product and biochar are mixed with straw powder, attapulgite, ground phosphate rock, plant ash, an oxidant, a water-retaining agent and other auxiliary components to prepare the soil remediation agent. The soil remediation agent is good in remediation effect, free of toxic and side effects, convenient to prepare, capable of rapidly remedying soil contaminated by organic matter, especially pesticide, capable of efficiently remedying contaminated soil and capable of achieving resource utilization of biomass resources, especially crop straw.

Description

technical field

[0001] The invention belongs to the field of soil remediation, and in particular relates to a soil remediation agent made of crop straw and biochar. Background technique

[0002] Soil pollution has become a worldwide problem, and organic pollution, especially persistent organic pollutant pollution is a major type of soil pollution. According to preliminary statistics, there are at least 13-16 million hectares of arable land polluted by pesticides and other organic substances in my country, and the trend is increasing day by day. Soil pollution can affect the yield and quality of crops, endanger human health through the food chain, and lead to further deterioration of the quality of the air and water environment. Therefore, the control of soil pollution is urgent.

[0003] Contaminated soil remediation generally reduces the concentration of pollutants in the soil to an acceptable level by transferring, adsorbing, transforming and degrading them, or transform...

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