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Method for jointly remedying polychlorinated biphenyls contaminated soil through microorganisms and mineral substances

A polychlorinated biphenyl and contaminated soil technology, applied in the field of contaminated soil treatment, can solve the problems of high environmental requirements, wide application limitations, high operating costs, etc., and achieve strong environmental friendliness, high repair efficiency, and improved desorption rate Effect

Active Publication Date: 2018-01-23
山东迈科珍生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chemical repair technology has high repair efficiency, but the high operating cost limits its wide application
Bioremediation technology mainly uses microorganisms to repair, which has little damage to the environment and high economic benefits, but it has high requirements on environmental conditions, long repair period, and it is difficult to find efficient PCBs degrading bacteria and other reasons, so it cannot be implemented

Method used

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  • Method for jointly remedying polychlorinated biphenyls contaminated soil through microorganisms and mineral substances
  • Method for jointly remedying polychlorinated biphenyls contaminated soil through microorganisms and mineral substances
  • Method for jointly remedying polychlorinated biphenyls contaminated soil through microorganisms and mineral substances

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for jointly treating polychlorinated biphenyl-contaminated soil with microorganisms and minerals, comprising the steps of:

[0035] 1) Select 0-30cm of the PCB-contaminated soil as the repair layer, fully plow the soil in the repair layer, and discard the impurities in the soil;

[0036] 2) Take out the biological agent and activate it at 28°C for 6 hours; then spread the biological agent evenly at an amount of 20kg biological agent / mu, plow, mix evenly, water until saturated, and biologically treat for 3 days.

[0037] The biological agent is prepared from five kinds of bacteria including Rhodopseudomonas palustris, Citrobacter freundii, Shewanella, Pseudomonas putida and Bacillus pumilus;

[0038] Specifically, the biological preparation is prepared according to the following steps:

[0039] 1) Add corn steep liquor 8g, glucose 6g, dipotassium hydrogen phosphate 0.2g, potassium dihydrogen phosphate 0.2g, sodium chloride 0.1g, calcium chloride 0.1g, ferrous s...

Embodiment 2

[0045] A method for jointly treating polychlorinated biphenyl-contaminated soil with microorganisms and minerals, comprising the steps of:

[0046] 1) Select 0-30cm of the PCB-contaminated soil as the repair layer, fully plow the soil in the repair layer, and discard the impurities in the soil;

[0047] 2) Take out the biological agent and activate it at 30°C for 6 hours; then spread the biological agent evenly at an amount of 20kg biological agent / mu, plow, mix evenly, water until saturated, and biologically treat for 4 days.

[0048] The biological agent is prepared from five kinds of bacteria including Rhodopseudomonas palustris, Citrobacter freundii, Shewanella, Pseudomonas putida and Bacillus pumilus;

[0049] Specifically, the biological preparation is prepared according to the following steps:

[0050] 1) Add corn steep liquor 8g, glucose 6g, dipotassium hydrogen phosphate 0.2g, potassium dihydrogen phosphate 0.2g, sodium chloride 0.1g, calcium chloride 0.1g, ferrous s...

Embodiment 3

[0056] The effect of treatment time and biological agent application rate on PCB removal efficiency:

[0057] 1. The present invention sets the treatment time to be 24h, 48h, 72h, 96h and 120h respectively, selects the contaminated soil with PCB content of 50mg / kg as the sample, and the rest of the operating procedures are the same as in Example 2. Detect the removal rate of polychlorinated biphenyls, the results are as follows figure 1 As shown, the removal rate is about 52.1% in 24h, 80.3% in 48h, 96.5% in 72h, and more than 99% after 96h.

[0058] 2. In the present invention, the application rates of biological agents are respectively 5kg / mu, 10 kg / mu, 20 kg / mu, 40 kg / mu and 80kg / mu, and the contaminated soil with PCB content of 50mg / kg is selected as the sample , and all the other operating procedures are the same as in Example 2. Detect the removal rate of polychlorinated biphenyls, the results are as follows figure 2 As shown, when the application rate of biological ...

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Abstract

The invention belongs to the technical field of contaminated soil remediation, and discloses a method for jointly remedying polychlorinated biphenyls contaminated soil through microorganisms and mineral substances. The method comprises the following steps that (1) 0-30 cm of the polychlorinated biphenyls contaminated soil is selected as a repair layer, soil of the repair layer is fully turned over, and sundries in the soil are discarded; and (2) a biological agent is taken out and put under the condition with the temperature ranging from 28 DEG C to 32 DEG C to be activated for 6 h, then the biological agent is uniformly sown according to the quantity of 10-30 kg biological agent / mu, turning over is carried out, uniform mixing is achieved, irrigation is carried out till saturation, and biological treatment is carried out for 2 days to 4 days. According to the method, biological substances and mineral substances are adopted for jointly remedying polychlorinated biphenyls soil contamination, the treatment manner is simple and feasible, the repair efficiency is high, and environment friendliness is high.

Description

technical field [0001] The invention belongs to the technical field of contaminated soil treatment, and in particular relates to a method for jointly treating polychlorinated biphenyl-contaminated soil by using microorganisms and minerals. Background technique [0002] Polychlorinated biphenyls (PCBs) Polychlorinated biphenyls are chlorinated aromatic hydrocarbon compounds formed by replacing hydrogen on biphenyl molecules with 1 to 10 chlorine atoms at different positions through chemical catalytic reactions. PCBs have Excellent physical and chemical properties such as thermodynamic stability, chemical inertness, non-flammability, high resistivity, etc., have been widely used in the field of industrial production, and later found that it has persistence, bioaccumulation, long-distance migration and obvious biological toxicity, etc. characteristics, can cause a great threat to organisms and human health through the transmission of the food chain, has been banned and included...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10C12N1/20C12R1/40C12R1/07C12R1/01
Inventor 裘正荣王国平徐海华
Owner 山东迈科珍生物科技有限公司
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