Source analysis method of atmospheric particulate matter based on particle size distribution information of stable elements

Abstract

The invention provides a method for analyzing the source of atmospheric particulate matter based on the particle size distribution information of stable elements. The process is as follows: 1. Collecting particulate matter in the ambient air based on a multi-particle size particulate matter graded sampler to obtain a receptor sample, and collecting particulate matter discharged from pollution sources to obtain source samples; 2. Determination of element content in source samples and acceptor samples, and screening of stable chemical components with source identification function in source samples and acceptor samples; 3. Construction of acceptor component profiles with high particle size resolution, High-resolution particle size spectrum of similar stable chemical components; 4. Obtain the high-resolution chemical component information of pollution source and environmental receptor particles through the above steps, and obtain the particle size distribution information of stable chemical components in the particles in the source The multivariate linear equations are established in the environmental receptors, and the contribution of the primary pollution emission source to the atmospheric particulate matter can be obtained through the formula. This method can provide timely, stable and refined analysis results for analytical objects such as heavily polluted processes.

Description

technical field [0001] The invention belongs to the field of environmental metrology, and in particular relates to a source analysis method for atmospheric particles based on stable element particle size distribution information. Background technique [0002] Atmospheric particulate matter source analysis technology is an important theoretical basis and key technical support for scientific prevention and control of particulate matter pollution. Atmospheric particle pollution is very serious in my country, especially in recent years, with the rapid economic and social development, the total energy consumption continues to rise, the concentration of atmospheric particles in most cities far exceeds the relevant health benchmarks of the World Health Organization. Atmospheric particulate matter source apportionment research uses chemical, physical, mathematical and other methods to qualitatively or quantitatively identify the source of atmospheric particulate matter pollution in ...

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Problems solved by technology

[0014] (1) Since the fitting operation of the receptor model is based on the measured data of the environment, it is essentially a mathematical statistical analysis model. At present, only multiple mathematical statistical parameters can be used to evaluate the goodness of fit, and the analytical results cannot be verified through actual measurement. That is, there is a problem that the results are difficult to verify;

[0015] (2) The particle composition information required by the receptor model is very complex, including nearly 30 kinds of chemical composition information such as inorganic elements, water-soluble ions and carbon components, involving multiple instrument analysis methods, cumbersome pretreatment procedures, and low analysis efficiency High, requiring more manpower and material resources, it has become a bottleneck link restricting the timeliness of source analysis, and cannot provide timely analysis results for analysis objects with high timeliness requirements such as heavy pollution processes; at the same time, the simultaneous analysis of many chemical species will lead to analysis It is difficult to guarantee the precision and accuracy, and it is difficult to control the analysis error, which brings a large initial error to the model fitting.

[0016] (3) In addition, the current receptor model is still insufficient for the analysis of collinearity sources. The improvement of receptor model technology is based on the traditional chemical composition spectrum. Improve the receptor model technology with the same idea, ignoring the important particle source information of physical particle size, under the condition of only analyzing the chemical components of the particles, due to the lack of effective markers of pollution sources, the measurement of chemical components is limited And sources with similar source spectrums (such as coal-fired power plant sources and scattered coal sources) are difficult to achieve refined source analysis

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