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DGT fixing membrane for methylmercury and metal mercury ions in sediment, and preparation method thereof, DGT apparatus and eluent

A technology for immobilizing films and deposits, applied in the field of thin film diffusion gradient technology DGT immobilization film and preparation, can solve the problems of high operating cost, single absorption function, low analysis and measurement efficiency, etc., achieve excellent performance, optimize the production process, and improve recovery. The effect of rate and elution detection efficiency

Pending Publication Date: 2018-11-06
南京智感环境科技有限公司
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Problems solved by technology

Diffusive gradients in thin films (DGT) is a non-destructive, in-situ technique for obtaining the distribution and activity of pollutants in sediments. Most of the fixed membranes used in the determination are fixed membranes with a single absorption function, that is, they can only absorb a single component, resulting in low analysis and measurement efficiency and high operating costs; Fixed membrane component of metallic mercury ions

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  • DGT fixing membrane for methylmercury and metal mercury ions in sediment, and preparation method thereof, DGT apparatus and eluent
  • DGT fixing membrane for methylmercury and metal mercury ions in sediment, and preparation method thereof, DGT apparatus and eluent
  • DGT fixing membrane for methylmercury and metal mercury ions in sediment, and preparation method thereof, DGT apparatus and eluent

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[0021] The present invention will be further illustrated below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art all fall into the appended claims of the present application to the amendments of various equivalent forms of the present invention limited range.

[0022] In the present invention, firstly, the TCH-95 resin is ground by a ball mill so that the particle diameter of the TCH-95 resin is in the range of 20 to 30 μm, and then polyacrylamide with a mass concentration of 30% is used as a gel film-forming liquid, and 0.1 The modified hydrated zirconium hydroxide powder of g / ml is used to improve the gel strength, after grinding for more than 15min, then add 0.25g / ml isothiourea functionalized macroporous cross-linked polystyrene r...

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Abstract

The invention discloses a DGT fixing membrane for methylmercury and metal mercury ions in sediment, and a preparation method thereof, a DGT apparatus and an eluent, wherein the fixing membrane is formed by carrying out film forming and gelation on the mixed liquid of polyacrylamide, zirconium hydroxide hydrate and an isothiourea functionalized macroporous cross-linked polystyrene resin. Accordingto the present invention, with the fixing membrane, the mercury metal in the wetland soil sediment can be efficiently and quickly adsorbed and eluted so as to determine the mercury content.

Description

technical field [0001] The invention belongs to the detection and analysis technology of environmental wetland soil heavy metals, in particular to CH in interstitial water in wetland soil 3 Hg + and Hg 2+ Thin film diffusion gradient technology DGT fixed film and its preparation method. Background technique [0002] At present, my country's water pollution is very serious, and sediment (wetland soil) pollution is an important cause. A large amount of pollutants are accumulated in the sediment. When the environmental conditions change, the pollutants are released from the sediment to the water body, causing continuous and high-intensity pollution to the water body, threatening the ecological balance and water supply security. Sediment interstitial water, as the dissolved part, is a sensitive indicator reflecting sediment changes. Obtaining the content and vertical distribution information of pollutants in interstitial water is an important data for evaluating the pollutio...

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Application Information

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IPC IPC(8): B01D71/36B01D67/00B01J20/26B01J20/30C02F1/28G01N1/34G01N1/40G01N33/24C02F101/20C02F101/30
CPCB01D67/0079B01D71/36G01N1/34G01N1/405G01N33/24C02F1/285B01J20/26C02F2101/30C02F2101/20
Inventor 丁士明高帅帅付镇任明漪
Owner 南京智感环境科技有限公司
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