A nano continuous sampler for volatile organic compounds in water

Abstract

The invention discloses a continuous nano sampler for volatile organic compounds in water. The sampler comprises a stainless steel liner, an inlet device, a peristaltic pump tube, filter elements, a peristaltic pump and an outlet device, wherein the filter elements refer to a high-permeability multi-walled carbon nanotube-alginate solid phase extraction filter elements. The method for preparing the high-permeability multi-walled carbon nanotube-alginate solid phase extraction filter elements comprises the following steps: preparing a 2 percent (w / v) of alginic acid pure water solution, adding 0.5g of multi-walled carbon nanotube, continuously shaking until a uniform black solution is obtained, immersing honeycomb ceramics with the size of 6mm into the black solution, so that the solution is fully immersed into the honeycomb ceramics; and finally, mixing 10 percent of the calcium chloride solution, standing for 2 hours, forming carbon nanotube-alginate gel, taking out the honeycomb ceramics in which the gel is formed, scraping the excessive gel on the surface by using a stainless steel scoop, washing for three times by using pure water, and drying, thereby obtaining the alginate-multi-walled carbon nanotube solid phase extraction filter elements.

Description

technical field [0001] The invention relates to a nanometer continuous sampler for volatile organic compounds in water. Background technique [0002] The pollution caused by volatile organic compounds (VOCs) in the environment has attracted more and more attention. In fact, many kinds of VOCs are toxic or carcinogenic, and have great harm to the ecosystem and even the human body. The main pollution sources of VOCs in water are scattered, such as industrial emissions, urban water use and accidental leakage, etc., and VOCs exist in many products and production processes (such as paints, fuels, petroleum products, raw materials, solvents, etc.), which makes the control of this Class pollution is difficult. Affected by the discharge and leakage of sewage treatment plants, the pollution of VOCs in groundwater is particularly serious. [0003] The types of VOCs released by different pollution sources are very different and not continuous, so continuous monitoring of polluted wat...

AI Technical Summary

Problems solved by technology

Because the PRCs method also has certain limitations, such as whether there are suitable PRC substances added, and the concentration calculated by PRCs is not a real time-weighted average concentration (time weighted average concentration TWAC), etc.

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