An in-situ injection-extraction-replenishment cycle disposal system and combined restoration method for organic matter-contaminated soil and groundwater

Abstract

The invention discloses an in-situ injection-extraction-replenishment cycle disposal system and a combined repair method for organic matter polluted soil and groundwater. The method is to pump groundwater from pollution sources or heavily polluted areas to the ground for treatment, and then use the treated groundwater to prepare pharmaceuticals or directly inject it into the ground as replenishment water, and the pharmaceuticals are injected into the underground pollution plume area through injection wells. The invention is used for in-situ treatment of soil and groundwater polluted by organic matter, and has the advantages of little interference, environmental friendliness, no secondary pollution, short repair period, wide application range and the like.

Description

technical field [0001] The invention relates to an in-situ injection-extraction-hydration cycle disposal system and a combined repair method for organic matter polluted soil and groundwater. Background technique [0002] Soil and groundwater are the basic environmental elements that constitute the natural ecosystem and the material basis for the survival and development of human beings. With the intensification of industrial pollution and the widespread use of agricultural chemicals, especially after the relocation of polluting factories such as chemicals, medicines, and pesticides around the city, a large number of abandoned sites have been left. The underground soil and groundwater of these sites are often polluted by organic matter, and the presence of pollutants in the soil and groundwater environment may have serious adverse effects on nearby human bodies and the surrounding environment, and may endanger human life in severe cases. In April 2004, during the constructio...

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Problems solved by technology

In addition, general polluted sites do not have weak foundations, especially industrial polluted sites generally have hardened ground and pond slag foundations, which cannot be operated with plug-in machines

Therefore, the feasibility of this patent is relatively poor

[0007]The in-situ remediation technology of soil and groundwater is a commonly used remediation method in the prior art. It has the advantages of convenient operation, low cost and wide application range. It mainly uses infiltration Adsorption media with a high coefficient can treat organic pollutants in groundwater by chemical or physical means, while currently known treatment media such as zeolite, activated carbon, and composite fillers are not effective in treating organic pollutants, especially refractory organic pollutants. Pollutants cannot be fully decomposed, and the removal efficiency is low; and in-situ restoration also faces the shortcomings of low restoration efficiency and long cycle, and there is also the risk of chemical restoration agent contamination

[0008] Ex-situ remediation of soil and groundwater has a wide range of applications, flexible and convenient treatment process, good treatment effect, short treatment cycle, and specific treatment can be adopted for specific pollutants technology, highly targeted; however, long-term and large-flow pumping of groundwater is likely to cause land subsidence, and the cost of off-site restoration is high, making it difficult to apply on a large scale

[0009] The ex-situ-in-situ repair technology is currently less used, and the above-mentioned combined repair methods are rarely studied in the prior art. The design process of the currently known combined repair methods does not reflect the cooperation between the two, and the design scheme is only two. The problem of simple superposition, the actual processing effect failed to achieve the purpose of 1+1>2;

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