Chinese Academy of Sciences

Yongfeng Jia

Yu Yang

Beidou Xi

Yonghai Jiang

Xinying Lian

Xu Han

Fu Xia

Xiangjian Xu

Huan Huan

Fan Feng

An in-situ reagents injection system comprises a compressed air storage tank, a remediation reagents storage tank, an injection adjusting valve, an injection pipe, an upper sealing device and a lower sealing device. When the reagents injection is carried out, the compressed air is injected before the remediation reagents is injected, the porosity of the aquifer medium is increased by utilizing the air pressure expansion technology to form a relatively uniform dominant channel, and the remediation reagents is injected to realize uniform and efficient conveying of the reagents. The in-situ reagents injection system and method can make the homogeneous and efficient conveying of the remediation reagents, and ensure the full utilization of the remediation reagents, with low energy consumption of injection equipment, simple process, and flexible operation. The injection is performed in sections from top to bottom according to the steps to improve the in-situ reagents injection efficiency and remediation efficiency.

In-situ reagents injection system and method

A medium material for removing phenol contamination from groundwater, a method of producing the same, and use of the same id disclosed. In at least some embodiments, the medium material is a granular material which has an average particle diameter of 0.5-1.5 cm and is formed from a bacteria-entrapping solution, a manganese sand filter material, modified bentonite, and biochar at a mass ratio of 1:0.2-0.4:0.2-0.4:0.1-0.2 by a series of processes including strain culturing, catalysis, mixing, solidification, and the like. The medium material can remove phenol from groundwater, is a safe and environment-friendly material, has a long service life, and/or achieves waste treatment with waste.

Medium material for removing phenol contamination from groundwater, method of producing the same, and use of the same

A field groundwater filtering sampling and moving-water flow index measuring device comprises a precipitation tank, an electrode measuring column of moving-water flow, a suction filter unit and a control unit; also provided is a measuring method by adopting the index measuring device. Sample filtering and electrode measuring work in the field groundwater sampling process can be integrally solved, sampling time point selection after well washing is scientifically and automatically achieved, and the sample filtering and collecting efficiency is remarkably improved; and meanwhile, the accuracy of testing various in-situ indexes such as pH value, oxidation reduction potential and the like in groundwater is remarkably improved in the design of moving-water flow electrode measurement. The method has good application prospect and value for carrying out groundwater monitoring and evaluation, remediation and governance, and the like.

Field groundwater filtering and sampling and moving-water flow index measuring device and method

A remediation system based on pollution obstruction for underground water with DNAPL pollutant is provided, including a vertical obstructing wall, a pump-out treating unit and a recharging unit, wherein the vertical obstructing wall is distributed at the periphery of a polluted area to obstruct the polluted underground water in the vertical obstructing wall; the pump-out treating unit includes a plurality of water pumping wells and overground treatment facility that are distributed in the polluted area, the plurality of the water pumping wells are configured to pump the polluted underground water out and sending it into the overground treatment facility so as to be treated; the recharging unit includes a plurality of recharging wells, and water treated by the overground treatment facility is recharged into a target aquifer in the polluted area by the plurality of the recharging wells. A remediation method using the system is provided.

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Beijing, China

Yongfeng Jia