Method for repairing soil containing novel organic pollutant by using sludge biological carbon

Abstract

The invention discloses a method for repairing soil containing novel organic pollutants by using sludge biological carbon. The method comprises the steps of (1), drying a biomass raw material containing sludge at a temperature of 40-60 DEG C, sieving the biomass raw material containing the sludge via a sieve with 10-200 meshes, and carbonizing the biomass raw material for 0.5-6 hours at a temperature of 300-650 DEG C under an anaerobic condition to prepare biomass carbon; (2), applying the prepared biomass carbon to the surface of the polluted soil according to a mass ratio of 0.5-5%, plowing the surface layer of the polluted soil in a distance of 0-30cm, and enabling the surface layer of polluted soil to be fully and evenly mixed with the biomass carbon; and (3), aging for 6-12 months. The biomass carbon is low in cost of preparation raw material and environmentalally-friendly; the preparation process is simple and feasible and totally conforms to the principle of turning waste into wealth and forming the stereoscopic agriculture. In addition, the biomass carbon contains a large quantity of carbon elements and nutritional ingredients; the biomass carbon has the effect of fertilizing the soil.

Description

technical field [0001] The invention relates to a method for repairing emerging organic polluted soil, in particular to a method for using sludge biochar to restore soil containing emerging organic pollutants. Background technique [0002] Soil is a natural adsorbent and carrier because of its electronegativity and high specific surface area, and it is the most important sink for emerging organic pollutants. Emerging Organic Contaminants (EOCs) include Endocrine Disrupting Chemicals (EDCs), Pharmaceuticals and Personal Care Products (PPCPs) and Perfluorinated Compounds (PFCs). Emerging organic pollutants are chemically very different from traditional persistent organic pollutants. Persistent organic pollutants tend to have low water solubility, so their mobility in soil is poor; while emerging pollutants have high water solubility and are mostly hydrophilic substances, so their mobility and bioavailability in soil are poor. High, more harmful to soil, especially agricultur...

AI Technical Summary

Problems solved by technology

[0010] (1) Physical restoration and chemical restoration are traditional restoration methods. Although the goal is direct and some results have been achieved in practical applications, there are problems such as complex implementation, high cost, large disturbance to the surrounding ecological environment, and serious ecological impact during construction. The remediation efficiency of low-concentration contaminated soil is often low;

[0011] (2) Phyto and microbial remediation methods are slow to take effect and are not suitable for highly polluted land. The restoration of agricultural land will bring about a reduction in economic benefits, and phyto and microbial remediation usually requires local appropriate species and inoculation methods to be formulated according to local conditions, Not conducive to large-scale promotion and application