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Renovating preparation for improving electric-microbial remediation of organic substance contaminated soil and using method for renovating preparation

A technology for microbial remediation and polluted soil, which is applied in the field of remediation preparations for electrokinetic-microbial remediation of organic matter-contaminated soil, which can solve problems such as prone to drastic changes, affect microbial activity, and lack, so as to increase soil current intensity, increase contact probability, The effect of small environmental impact

Inactive Publication Date: 2015-05-20
SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are still some problems in the electrokinetic-microbial remediation process: (1) organic pollutants have low solubility and strong adsorption capacity, are less directly affected by the electric field, and are not easy to contact with microorganisms; (2) soil pH is easy to occur (3) Underground polluted areas often lack nutrients such as nitrogen and phosphorus required for microbial metabolic activities; (4) Due to electrochemical reactions, soil moisture decreases and ion Concentration decreases, current intensity decreases

Method used

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  • Renovating preparation for improving electric-microbial remediation of organic substance contaminated soil and using method for renovating preparation
  • Renovating preparation for improving electric-microbial remediation of organic substance contaminated soil and using method for renovating preparation
  • Renovating preparation for improving electric-microbial remediation of organic substance contaminated soil and using method for renovating preparation

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The petroleum-contaminated soil in the examples was collected from Liaohe Oilfield, air-dried after removing impurities, and ground through a 20-mesh sieve for later use. The soil oil content is 3.54%, the organic carbon content is 5.91%, the total nitrogen is 0.15%, and the total phosphorus is 0.047%.

[0026] In this example, two treatments are set up, wherein: treatment 1 is used as a control, no restoration preparation is added before and during the treatment; treatment 2 is added with restoration preparation before the experiment, and during the treatment, according to the ratio of C, N, P in the soil Changes, the addition of repair preparations.

[0027] Treatment 1 is to put the contaminated soil directly into the soil chamber, and add water to make the soil humidity 25%.

[0028] Treatment 2 first mixes the contaminated soil with the restoration preparation, so that the addition of the restoration preparation is 25g (solubilizer accounts for 20%, electrolyte ac...

Embodiment 2

[0032] The polluted soil in the examples was collected near Benxi Iron and Steel Company, air-dried after removing impurities, and ground through a 20-mesh sieve for later use. The total content of 16 priority control polycyclic aromatic hydrocarbons in the soil is 215.0mg / kg, the organic carbon content is 1.77%, the total nitrogen is 0.09%, and the total phosphorus is 0.04%.

[0033] In this embodiment, two processes are set, and the specific processing method is the same as that in Embodiment 1.

[0034] Treatment 1 is to put the contaminated soil directly into the soil chamber, and add water to make the soil humidity 25%. Treatment 2 first mixes the contaminated soil with the remediation preparation, so that the addition of the remediation preparation is 10g (solubilizer accounts for 10%, electrolyte accounts for 57.1%, and moisture accounts for 32.9%) in every kilogram of soil, and contains 0.05g Triton X- 100, 0.75g β-cyclodextrin, 0.2g Brij35, 0.49g K 2 HPO 4 , 0.19g ...

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Abstract

The invention belongs to the technical field of environmental renovation, and particularly relates to a renovating preparation for improving electric-microbial remediation of organic substance contaminated soil and a using method for the renovating preparation. The preparation is prepared from the following components in percentage by weight: 10-20% of a solubilizer, 40-60% of electrolyte and the balance of water, wherein the solubilizer is one or more of Triton X-100, beta-cyclodextrin and Brij35. The renovating preparation disclosed by the invention can improve the contact efficiency of pollutants and microorganisms, and also can keep the pH of the soil unchanged, can improve the soil current intensity and can provide sufficient nutrient salts to the microorganisms, so that the electric renovating efficiency is improved by over 30%.

Description

technical field [0001] The invention belongs to the technical field of environmental remediation, and in particular relates to a remediation preparation and a use method for improving electrokinetic-microbial remediation of organic matter-contaminated soil. Background technique [0002] Soil is the basis for human survival and development, and it is also an important part of the human ecological environment. With the increasing dependence of human beings on chemicals, the pollution of organic substances to the environment is becoming more and more serious. Organic pollutants in soil mainly include volatile organic pollutants and semi-volatile organic pollutants. The main types of soil organic pollutants in my country include: petroleum hydrocarbon pollutants, polycyclic aromatic hydrocarbons, halogenated hydrocarbon pollutants, pesticide pollutants, polychlorinated biphenyls and other organic pollutants. Soil organic pollutants can be directly ingested by the human body, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/10C09K17/40C09K101/00
Inventor 李凤梅郭书海杨雪莲吴波梁玉海
Owner SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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