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Remediation method of polycyclic aromatic hydrocarbon contaminated soil

A remediation method, polycyclic aromatic hydrocarbon technology, applied in the field of remediation of polycyclic aromatic hydrocarbon-contaminated soil, can solve the problems of secondary pollution and bioremediation efficiency to be improved, achieve strong desorption capacity, enhance bioremediation efficiency, and enhance availability sexual effect

Active Publication Date: 2019-11-29
YANBIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this is likely to cause secondary pollution, and the efficiency of bioremediation needs to be improved

Method used

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  • Remediation method of polycyclic aromatic hydrocarbon contaminated soil
  • Remediation method of polycyclic aromatic hydrocarbon contaminated soil
  • Remediation method of polycyclic aromatic hydrocarbon contaminated soil

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preparation example Construction

[0028] In the present invention, the preparation method of the bioactive water (bioactive water; BW) preferably comprises the following steps:

[0029] mixing peat soil, bentonite, calcium alginate, cement and water, and solidifying and molding the obtained mixed slurry to obtain a molding mixture;

[0030] The molding mixture and pumice are placed in water for aeration to obtain biologically active water.

[0031] In the present invention, peat soil, bentonite, calcium alginate, cement and water are preferably mixed, and the obtained mixed slurry is solidified and molded to obtain a molding mixture. In the present invention, there is no special limitation on the types and sources of the peat soil, bentonite, calcium alginate and cement, and commercially available products well known to those skilled in the art can be used; wherein, the pH value of the peat soil is preferably 5.47.

[0032] In the present invention, the mass ratio of peat, bentonite, calcium alginate and ceme...

Embodiment 1

[0043] 1. Preparation of biologically active water

[0044] Mix 40g of peat soil (pH value 5.47), 20g of bentonite, 0.6g of calcium alginate and 15g of cement, and then spray an appropriate amount of distilled water under stirring conditions to form a mixed slurry with suitable hardness and softness, and add the mixed slurry to the mold 12g of the molding mixture and 24g of pumice were put into 1000mL of distilled water, and aerated for 4d by using an air pump at a flow rate of 0.55L / min, and then filtered to remove the molding mixture. material and pumice to obtain biologically active water (BW).

[0045] 2. NaCl solubility analysis

[0046] Take 100mL of biologically active water, filter with GF / C filter paper (Whatman 1822-047), then take 25mL of the resulting filtrate into three 100mL beakers, place the beakers on a heatable magnetic stirrer and stir, the temperature of the biologically active water Keep at 30°C, slowly add NaCl solid until the NaCl solid can no longer b...

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Abstract

Belonging to the technical field of soil remediation, the invention provides a remediation method of polycyclic aromatic hydrocarbon contaminated soil. The method provided by the invention utilizes bioactive water to make polycyclic aromatic hydrocarbon contaminated soil into soil mud, so that polycyclic aromatic hydrocarbon in the polycyclic aromatic hydrocarbon contaminated soil has low distribution coefficient in the soil mud sample, specifically, the bioactive water has strong desorption capacity on polycyclic aromatic hydrocarbon, and can increase the amount of solute in a water phase, therefore more polycyclic aromatic hydrocarbon can be dissolved in the bioactive water, thus facilitating subsequent biodegradation. Moreover, the bioactive water is non-toxic, and does not cause secondary pollution possibly like organic solvents, surfactants, etc. In addition, the bioactive water can activate the metabolism of microorganisms and enhance the availability of microorganisms. Based onbioactive water, the method provided by the invention utilizes polycyclic aromatic hydrocarbon degrading bacteria for biodegradation of soil mud, and is conducive to enhancing the bioremediation efficiency.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a method for remediating soil contaminated by polycyclic aromatic hydrocarbons. Background technique [0002] With the development of society and the acceleration of industrialization, the types and quantities of industrial "three wastes" are increasing rapidly, and the organic pollutants entering the soil are also increasing. Polycyclic Aromatic Hydrocarbons (PAHs) are a class of persistent organic pollutants (Persistent Organic Pollutants, POPs) that are ubiquitous in soil (including saline-alkali soil and general soil), and have strong teratogenic, Carcinogenic and mutagenic effects. Therefore, how to effectively remediate PAHs-contaminated soil has become a common concern in the field of environmental protection at home and abroad in recent years and a major problem to be solved urgently. [0003] After more than 30 years of research and application, a PAHs-contami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
CPCB09C1/105
Inventor 李光春闫晗
Owner YANBIAN UNIV
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