Soil restoration method for treating polluted land and underground water through fly ash and biomass charcoal

Abstract

The invention relates to a soil remediation method for treating polluted land and groundwater with fly ash and biomass charcoal, which uses a mixture of fly ash and biomass charcoal to synthesize surface soil, deep soil and groundwater of industrial and agricultural polluted land Soil remediation treatment, the fly ash includes but not limited to fly ash produced by power plants, blast furnaces in heating stations, paper mills and industrial and mining enterprises; the biochar includes but not limited to plants, wood and wood processing waste, Agricultural waste biomass of rice straw and straw, municipal solid organic waste, municipal sewage treatment plant sludge and biosolids are prepared by thermal cracking or hydrothermal carbonization processes.

Description

【Technical field】 [0001] The invention relates to a soil bioremediation method, in particular to a soil remediation method for treating polluted land and groundwater with fly ash and biomass charcoal, and belongs to the technical field of environmental protection. 【Background technique】 [0002] Soil pollution caused by heavy metals, polycyclic aromatic hydrocarbons, and petroleum hydrocarbons is common in chemical manufacturing, petroleum refining, metal processing, automobile manufacturing, textile printing and dyeing, pulp and paper, and electroplating. Agricultural land is mostly polluted by heavy metals and pesticides (including DDT, HCH, etc.) to varying degrees due to industrial wastewater pollution and excessive and improper application of pesticides and fertilizers. These pollutants will cause serious harm to the environment such as soil and groundwater, the surrounding workers, and the health of residents near the polluted site. [0003] At present, the methods of...

AI Technical Summary

Problems solved by technology

However, due to the lack of specificity in the absorption and utilization of pollutants by microorganisms or plants and the very low mass transfer rate of pollutants in the soil, the existing in-situ bioremediation methods have low cost, easy implementation, and soil texture damage after treatment. Small size and high reuse rate, but the processing time is long and there is a strong uncertainty in the processing effect

Therefore, these remediation methods cannot meet the requirements of soil sustainability such as rapidity, low cost, high efficiency, and maintenance of remediation soil texture and fertility.