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

An industrial environment, fluorescence spectroscopy technology, applied in the direction of measuring devices, material analysis using wave/particle radiation, material analysis using measurement of secondary emissions, etc., can solve the problem of long analysis period and lack of continuous sampling and detection capabilities on the polluted site , unable to meet the application requirements of heavy metal pollution in the industrial environment, continuous and automatic monitoring, etc.

Inactive Publication Date: 2016-05-04
HEFEI UNIV OF TECH
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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 sampl

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

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Embodiment Construction

[0042] Such as figure 1 and figure 2 Shown, a kind of X-ray fluorescence spectroscopic detection method of industrial environment air heavy metal is characterized in that, comprises the following steps:

[0043] 1. Carry out continuous and real-time collection of industrial ambient air to realize the enrichment of heavy metal components, as follows:

[0044] The sampling pump is used to sample the industrial ambient air at a constant flow rate, and the collected air samples are sent to the particle size cutting head through the sampling tube. The particle size cutting head will collect the air samples for particle size classification and remove the air samples. Large-particle aerosol, and the remaining air samples are sent to the aerosol enrichment filter membrane through the sampling tube for aerosol sampling, thereby achieving heavy metal enrichment and obtaining heavy metal enrichment points;

[0045] The aerosol enrichment filter membrane is a roll-type filter paper tape ...

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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 ...

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Application Information

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IPC IPC(8): G01N23/223G01N23/22
CPCG01N23/2202G01N23/223G01N2223/076G01N2223/1016G01N2223/638G01N2223/652
Inventor 陈东贾兆丽房鹏辉章伟张玉钧甘婷婷殷高方
Owner HEFEI UNIV OF TECH
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