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

A biochar and soil remediation technology, applied in the restoration of contaminated soil, etc., can solve the problems of lack of special effects, low mass transfer rate of pollutants, long processing time, etc., achieve strong specific surface area and porosity, and increase speed and effect, accelerated removal and wash-out effect

Inactive Publication Date: 2017-10-20
加拿大通用环境技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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. Sma...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The present invention is a soil remediation method for treating polluted land and groundwater with fly ash and biochar, which is used for the pollution remediation of topsoil and shallow soil (<2m), and comprises the following process steps:

[0020] First, fly ash and biochar are mixed in a ratio of 1:1 to 1:10 (mass ratio). Then, the soil is excavated and loosened and the mixture of fly ash and biochar is applied to the soil at a dose of 5-500 tons / ha and mixed with it uniformly. Afterwards, the soil is irrigated with 1-10 cm and the ground is plowed within 2-14 days to further promote the mass transfer of pollutants in the soil and the growth of microorganisms. After 10-60 days, the soil was sampled and tested for the types and distribution of inorganic and organic pollutants in the soil.

[0021] Wherein, the fly ash includes, but is not limited to, the fly ash produced by blast furnaces in power plants, heating stations, paper mills, and industrial and mining ente...

Embodiment 2

[0023] The present invention is a soil bioremediation method using fly ash and biochar to treat polluted land, groundwater and comprehensive treatment of polluted land and groundwater. It is used for the pollution restoration of deep soil (>2m) and groundwater, and it includes the following process steps:

[0024] First, fine powder (particle size 3 The concentration is mixed with water, and the Runtuling TM Soil remediation reagents are dissolved in it. Shafts are drilled on the contaminated land to be treated to reach the location of the pollutants. Mix the prepared mixture evenly and pump it from the upstream of the pollutant to the pollutant through the vertical shaft. And another pump draws the pumped liquid from the downstream where the pollutant is located. Circularly transport and extract the mixed solution. After 10-45 days, take soil sampling on the polluted plot and test the concentration and distribution of inorganic and organic pollutants in it.

[0025] Wherei...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/02
CPCB09C1/00B09C1/002B09C1/02B09C2101/00
Inventor 张晓琨罗赣娟罗春晖郑彬
Owner 加拿大通用环境技术有限公司
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