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A primary battery device and repair method for repairing chromium-contaminated soil based on microorganism-organic matter

A technology for chromium-contaminated soil and contaminated soil, which is applied in the field of soil heavy metal remediation, to achieve the effect of improving metabolism, high efficiency and simple operation

Active Publication Date: 2022-06-07
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to overcome the defects and deficiencies of existing methods for remediating chromium-contaminated soil, and to provide a primary battery device for remediating chromium-contaminated soil based on microorganism-organic matter and its repair method

Method used

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  • A primary battery device and repair method for repairing chromium-contaminated soil based on microorganism-organic matter
  • A primary battery device and repair method for repairing chromium-contaminated soil based on microorganism-organic matter
  • A primary battery device and repair method for repairing chromium-contaminated soil based on microorganism-organic matter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Example 1 Primary battery device for remediation of chromium-contaminated soil based on microorganism-organic matter

[0065] This embodiment provides a galvanic cell device for remediating chromium-contaminated soil based on microorganisms and organic matter, including an anode chamber 1, a cathode chamber 2, an electron transfer path 3 and a salt bridge 4; the upper side of the anode chamber 1 is provided with a feeding port 11 , The lower part of the side is provided with a discharge port 12, the top of the anode chamber 1 is provided with a sealing cover 13, and the electrode 114 is inserted into the interior of the anode chamber 1 through the sealing cover 13; the diameter of the hole is the same as the diameter of the electrode 114;

[0066] The cathode chamber 2 is composed of a soil storage tank 21 with an upper opening, a rinsing recovery system 22 and an electrode 2 23. The rinsing and recovery system 22 is arranged inside the soil storage tank 21, and a filter...

Embodiment 2

[0072] Example 2 Remediation of Chromium Contaminated Soil

[0073] A method for remediating chromium-contaminated soil utilizing the device of embodiment 1, comprising the following steps:

[0074] S1. The organic matter is pretreated and mixed with anaerobic sludge containing electricity-producing microorganisms, loaded into the anode chamber 1, the contaminated soil is loaded into the soil storage tank 21, and the eluent is added to the soil storage tank 21 for leaching washing, and then flows into the leaching recovery system 22, and forms a closed loop through the transfer between the salt bridge 4 and the electrons to repair the contaminated soil;

[0075] S2. Take out the mixture of organic matter and anaerobic sludge obtained in step S1 from the anode chamber 1, take out the repaired contaminated soil from the soil storage tank 21, mix, and plant chromium-resistant plants to extract the remaining chromium in the contaminated soil, that is, to complete the pollution so...

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Abstract

The invention discloses a primary battery device for repairing chromium-contaminated soil based on microorganism-organic matter and a repair method thereof. The anaerobic sludge containing electrogenic microorganisms in the device is mixed with organic matter to generate electrons, and electrons are transferred through electrode materials and electron transfer pathways to restore Cr in chromium-contaminated soils. 6+ , and through the K in the salt bridge + Induction to improve the metabolism of electrogenic microorganisms and promote the activation of chromium, and the addition of organic acid eluent can promote the adsorption and transformation of some Cr in soil by microorganisms 6+ ; Subsequently, the mixture of organic matter and anaerobic sludge is taken out and mixed with the restored contaminated soil, and the planting of chromium-tolerant plants can enrich the residual chromium in the contaminated soil in large quantities, ensuring that Cr in the soil 6+ The concentration meets the corresponding land type standards; the application of this device to remediate chromium-contaminated soil can quickly and effectively solve the problem of chromium pollution, and has the advantages of low cost, simple operation, high efficiency, and no secondary pollution. application potential.

Description

technical field [0001] The invention belongs to the technical field of soil heavy metal remediation. More specifically, it relates to a galvanic battery device and its remediation method for remediating chromium-contaminated soil based on microorganisms and organic matter. Background technique [0002] With the rapid development of my country's industry, chromium is widely used in electroplating, metal processing, tanning, dyes, steel and chemical industries. A large amount of chromium enters the soil and groundwater around the site, Cr 6+ It has become a major industrial site soil pollutant. The polluting chromium is mainly Cr 6+ and Cr 3+ There are 2 valence forms, Cr 6+ The toxicity of Cr 3+ 500 times. Cr 3+ It is easily fixed in the soil by soil colloids and minerals through adsorption, coordination, complexation, precipitation, etc., and its mobility and bioavailability are low; while Cr 6+ It has high activity and is generally not strongly adsorbed by the soil,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08B09C1/10B09C1/02
CPCB09C1/085B09C1/10B09C1/02Y02E60/50
Inventor 王俊锋唐观辉严登明朱丛韵张铖彪田萍蔡泽祥江惠民周焕展
Owner JINAN UNIVERSITY