Badge type passive air sampler based on MCM-41 molecular sieve

Abstract

The invention discloses a badge type passive air sampler using MCM-41 molecular sieve as an adsorbent and provides a simple method for sampling volatile organic compounds in air. The method employs pure-silicon MCM-41 molecular sieve as an adsorbent to adsorb and sample various volatile organic compounds in air; the sampler is composed of a protective shell, a fixing shell, a front-end filter membrane, an adsorbent cage and a fixture for wearing; the adsorbent cage with the molecular sieve loaded therein is composed of a metal thin mesh and a covering filter membrane, and the adsorbent cage can be conveniently taken out for desorption or regeneration; the MCM-41 molecular sieve acting as an adsorbent is simple to regenerate, adjustable in pore diameter and harmless to human bodies, and has mesoporous channels facilitating diffusion of pollutant molecules; the sampler is power-free, portable, simple in structure, simple to operate, high in regeneration rate and low in cost, and is suitable for monitoring air in a work environment or living environment and evaluating the amount of organic pollutants in contact with personnel.

Description

technical field [0001] The invention relates to a badge-type passive air sampler using pure silicon MCM-41 molecular sieve as an adsorbent, which can adsorb and capture various gas pollutants in the air. Background technique [0002] With the development of China's economy, the problem of air pollution has become increasingly serious, which has threatened the sustainability of China's development and has become a major factor threatening the health of the people in various regions. People increasingly need more economical and portable air sampling devices to detect the quality, type, content and other data of various pollutants in various environments. [0003] Air samplers currently on the market are divided into active and passive. Existing samplers are usually active samplers. For example, the application number is CN201120212738.6, and the name is Breeze Air Sampler. The patent publication number is CN202133570U. A fan is installed on the sampler, and the fan is turned ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of rare types and poor reproducibility of passive air samplers on the market, the present invention uses pure silicon MCM-41 molecular sieve as an adsorbent to design a badge-type passive air sampler that can effectively collect VOCs components in the air. The monitoring results reflect the types and quantities of various organic pollutants that the wearer is exposed to within a certain period of time

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