Underground water remediation method for pesticide contaminated site

Abstract

The invention relates to the technical field of water treatment, in particular to an underground water remediation method for a pesticide contaminated site, which comprises the following steps: homogenizing and regulating underground water of a pesticide contaminated site; carrying out magnetic coagulation treatment on the homogenized and regulated water body; adjusting the water body subjected tothe magnetic coagulation treatment to be acidic and carrying out micro-electrolysis treatment; adjusting the water body subjected to micro-electrolysis treatment to be acidic and carrying out heterogeneous catalytic oxidation treatment; adjusting the water body subjected to heterogeneous catalytic oxidation treatment to be alkaline, and sequentially carrying out flocculation and precipitation toobtain supernatant; pumping the supernatant into an activated carbon adsorption tank for adsorption treatment, and discharging the supernatant after the supernatant reaches the standard. The method has pertinence and specificity for underground water pollutants in a pesticide field, can efficiently degrade pesticides in underground water in a short time, is good in treatment effect, high in removal efficiency and free of secondary pollution to the environment, and is simple and easy to operate, and investment and operation costs are greatly reduced compared with a conventional treatment method.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a groundwater restoration method for pesticide-contaminated sites. Background technique [0002] With the acceleration of urbanization and the adjustment of industrial structure and industrial layout, factories and enterprises in the main urban area of ​​the city will be relocated, and the replaced industrial land will become commercial and residential land. However, many years of industrial activities have caused serious environmental pollution of the soil and groundwater in the factory area, especially the damage to the soil and groundwater caused by pesticide companies, which needs to be repaired urgently to ensure ecological security. Therefore, how to deal with relocation and pollution of abandoned sites; how to rationally develop and utilize its land value have become important environmental challenges faced by countries all over the world. [0003] At present, the...

AI Technical Summary

Problems solved by technology

[0003] At present, there are mainly two remediation technologies for contaminated groundwater: in-situ remediation and ex-situ remediation. Among them, in-situ remediation mainly uses an adsorption medium with a high permeability coefficient to treat organic pollutants in groundwater by chemical or physical means. Known treatment media such as zeolite, activated carbon, and composite fillers have low treatment effects, and cannot fully decompose organic pollutants, especially refractory organic pollutants, and the removal efficiency is low, and in-situ repair also faces low repair efficiency and long cycle , prone to the risk of secondary pollution; ectopic remediation technology is also called extraction treatment technology, in the process of treatment, the polluted groundwater is pumped out from the aquifer, and then treated and purified on the ground, so that the pollutants dissolved in the water can be recovered Removal, this technology has a wide range of applications, a short treatment cycle, and a flexible and convenient treatment process, but specific treatment processes are required for different pollutants

[0004] The research on the remediation technology of contaminated sites in my country started relatively late, especially for the remediation of groundwater in pesticide-contaminated sites. It is still in its infancy, the technology is in the research and development stage, and the engineering cases are also in the initial demonstration stage.

Images