Research on priority screening methods of environmental pollutants and analysis of screening results of priority pollutants in China

Objective To explore and analyze the applicability of common screening method for environmental pollutants and the characteristics of selected environmental pollutants in China.

Methods Through the collection and summary of literature and keyword analysis method based on VOSviewer, we undevstood several commonly used pollutant screening method and their applicability, focusing on the characteristics of selected environmental pollutants in China. Based on the relevant research result of the whole country and many regions in China, the top three priority pollutant categories of natural and polluted environment were compared.

Results Comprehensive scoring method, Hasse diagram method, potential hazard index method and analytic hierarchy process are all commonly used in the screening for environmental pollutants in China, among which the comprehensive scoring method is more widely used. A variety of polycyclic aromatic hydrocarbons, benzene series and heavy metals are listed as priority pollutants.

Conclusion The comprehensive scoring method is widely used in the screening of environmental pollutants in China and has stronger advantages compared with other method. In addition, polycyclic aromatic hydrocarbons, benzene series and heavy metals are the main priority pollutants in China's environment.