Application of molasses in chromium-polluted soil remediation and remediation method

Abstract

The invention discloses an application of molasses in chromium-polluted soil remediation and a remediation method. The molasses are used for remediation of the chromium-polluted soil. The remediation method comprises the specific steps of: pretreating the chromium-polluted soil, preparing molasses agent, determining the added amount of the molasses agent, mixing the polluted soil and the molasses agent, reacting the polluted soil and the molasses agent, conserving the remediated soil and detecting the concentration of chromium pollutants in the soil at the later stage to ensure the stability. The application and the remediation method disclosed by the invention have the advantages that the molasses are used as a biochemical reduction agent in the chromium-polluted soil remediation, and the remediation efficiency is high; due to addition of the molasses, an organic carbon source and trace elements are provided for native-bacteria type microorganisms in the soil, the breeding metabolism of the microorganisms is promoted, and the biological remediation action is enhanced; in addition, the source of the molasses is wide, the price is low, no negative and positive ions are introduced, and the soil structure after remediation is improved, so that the improved soil is beneficial to following development and utilization, can be used for large-scale engineering implementation and can effectively prevent secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a use of molasses in the remediation of chromium-polluted soil and a remediation method. Background technique [0002] At present, there are many and widely distributed chromium pollution sites in China, such as chrome plating factories, leather factories, chrome salt factories, etc. In particular, the historical sites have been polluted for a long time, and the content of pollutants in the sites is high, which is easy to spread to the surrounding area and contribute to the local environmental quality. and pose a huge threat to human health. Contaminated soils in chromium-contaminated sites are generally heavily polluted and buried deep, making soil remediation difficult to overcome. There are two main ways to remediate chromium-contaminated soil: one is to change the form of chromium in the soil to reduce its mobility and bioavailability in the environment,...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a use of molasses in the restoration of chromium-contaminated soil and a restoration method to solve the problem of poor stabilization effect of the restoration agent used in the existing chromium-contaminated soil restoration technology, and the addition of the agent is relatively high, and the stability after restoration is poor. It is easy to cause the technical problem of secondary pollution; it also solves the problem that the existing remediation agents are easy to introduce too many ions that reduce the soil quality, resulting in a large increase in soil volume after remediation, which is not conducive to subsequent development and utilization; in addition, it also solves the problem of existing remediation technology Technical problems such as complex operation, high cost of remediation agents, and unsuitability for large-scale soil remediation applications

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