Production method of carbon fiber cloth surface molecular imprinting passive sampling membrane for organic pollutants in water environment

Abstract

The invention discloses a production method of a carbon fiber cloth surface molecular imprinting passive sampling membrane for organic pollutants in water environment. The method comprises the following steps: removing a pasting agent from the surface of a carbon fiber cloth, silanizing the surface of the carbon fiber cloth, and carrying out thermal initiation to realize the effective support of a molecular imprinting substance on the surface of the carbon fiber cloth. The above obtained product can be used to passively collect the organic pollutants in sewage. The surface molecular imprinting substance has construction predetermination property and special identity, and corresponding molecular imprinting substances can be prepared according to the difference of the kind of monitored pollutants, so the selectivity of a passive sampler is improved, and the environment matrix interference problem of traditional passive samplers is effectively reduced. The sampling membrane adopting the carbon fiber cloth with high mechanical strength and light mass as a carrier can be directly exposed to water, so the mass transfer uniformity of target pollutants in the passive enrichment process is improved, thereby the precision of a passive sampling device is improved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for preparing a molecularly imprinted passive sampling film on the surface of carbon fiber cloth for organic pollutants in a water environment. Background technique [0002] Most of the passive sampling techniques currently used use commercial broad-spectrum granular adsorbents as the binding phase, and at the same time, it is necessary to use permeable membrane materials to fix the binding phase of the passive sampling device during passive sampling. This kind of sampling device is that when collecting organic pollutants in the water environment, the target pollutants must first pass through the membrane material before contacting the binding phase, and the mass transfer kinetics of the pollutants between the binding phase particles is often not uniform, so resulting in poor sampling precision. The use of membrane materials directly as the binding phase can gr...

AI Technical Summary

Problems solved by technology

In addition, the complex matrix such as natural organic matter existing in the actual water environment will compete with the target pollutant molecules for the effective adsorption sites of the binding phase of the passive sampler, resulting in a decrease in sampling precision and even invalidation of the sampler

Images