An X-ray fluorescence spectroscopy on-line detecting method for heavy metals in industrial ambient air

Abstract

The invention discloses an X-ray fluorescence spectroscopy on-line detecting method for heavy metals in industrial ambient air. The industrial ambient air is subjected to continuous sampling by utilization of a sampling pump. Particles in the air are subjected to diameter cutting through a diameter cutter head. The heavy metals in the air are enriched by utilization of a tape air filtering membrane. An advanced energy dispersive X-ray fluorescence (EDXRF) analysis system is adopted to collect a filtering membrane background spectrum and an enriched-sample spectrum. Influences of tape base elements on detection are eliminated by utilizing a background deduction method. Inversion of concentrations of the heavy metals in the air is achieved by adopting an algorithm for least-squares fitting. Multi-element on-line automatic measurement of heavy metal pollution in the industrial ambient air is achieved.

Description

technical field [0001] The invention belongs to an X-ray fluorescence spectrum online detection method, in particular to an X-ray fluorescence spectrum detection method for on-line detection of multi-element heavy metal pollution components in industrial environment air. Background technique [0002] With the continuous acceleration of industrialization and urbanization, the problem of environmental pollution has become more and more serious. As a kind of environmental pollution problem with a wide spatial distribution and great harm, industrial heavy metal pollution has attracted much attention. Heavy metals emitted from industrial waste gas are the main source of heavy metal pollution in the atmosphere. They are mainly enriched in aerosol particles, and the smaller the particles, the higher the heavy metal content. Aerosol fine particles can directly enter the lower respiratory tract of the human body, deposit in the lungs, and even enter the blood or other organs through ...

AI Technical Summary

Problems solved by technology

[0003] At present, the technical methods for detecting heavy metal components in the air environment mainly include laboratory analysis methods such as atomic absorption spectrometry (AAS), mass spectrometry (MS), and inductively coupled plasma-atomic emission spectrometry (ICP-AES). Ambient air sampling and laboratory pretreatment are required, the analysis period is long, and it does not have the ability to continuously sample and detect pollution sites, and cannot meet the application requirements of on-site, continuous, and automatic monitoring of heavy metal pollution in industrial ambient air

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