Fractional atmosphere mercury monitoring equipment and monitoring method

Abstract

The invention provides morphological atmospheric mercury monitoring equipment and a monitoring method. The morphological atmospheric mercury monitoring equipment comprises a gaseous mercuric oxide collection and thermal desorption device, a granular mercury collection and thermal desorption device, a cation exchange filter device, a cold atomic fluorescence mercury analyzer and a switching valve. Gas passing through the gaseous mercuric oxide collection and thermal desorption device and the particle mercury collection and thermal desorption device contains gaseous element mercury and gaseous mercuric oxide which is not captured, and the total mercury concentration can be measured. The gas passing through the cation exchange filtering device only contains gaseous element mercury, and the gaseous element mercury can be measured. Therefore, mercury in different forms can be captured, the concentration of gaseous mercuric oxide is accurately calculated in combination with zero-gas purging analysis and a difference value method, the analysis error of the gaseous mercuric oxide is greatly reduced, and the requirement for accurately monitoring atmospheric mercury in different forms under various environmental atmospheric conditions is met.

Description

Technical field [0001] The present invention relates to environmental scientific analysis and environmental detection devices technical field, and more particularly to a sub-formal gas mercury monitoring device and a monitoring method. Background technique [0002] Mercury is a global pollutant, which has great harm to environmental and human health. There are three forms of mercury in the atmosphere, gaseous Elemental Mercury, GEM, gaseous oxidizedmercury, goms and Particulate Bounded Mercury, PBM. Among them, GEM is stable, and the residence time is between 0.5-2 years, which is the main ingredient of atmospheric mercury, accounting for 90% -99%. The chemical properties of GOM and PBM are relatively lively, and the average residence time is in a few weeks - a few months. Although GOM and PBM are small in the atmosphere, it is a major part of the atmospheric mercury settling, GOM and PBM will land to the surface through dry settling and wet sink, and further translate into highl...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a monitoring device and method for monitoring atmospheric mercury in different forms, which are used to solve the problem of detecting the concentration of gaseous mercury oxide in ambient air samples in different forms of mercury in the prior art. Accurate defects reduce the analysis error of gaseous mercury oxide, which can meet the monitoring requirements of atmospheric mercury in various ambient atmospheric conditions

Images