Modeling method of heavy metal optimal control pollutant screening model based on river ecosystem

Abstract

The invention discloses a modeling method of a heavy metal optimal control pollutant screening model based on a river ecosystem, and relates to the technical field of evaluation of risks of the river ecosystem. The modeling method of the heavy metal optimal control pollutant screening model based on the river ecosystem aims to screen one or more heavy metal optimal control pollutants to represent the heavy metal pollution status of a river. The method includes the steps that toxic coefficients, pollution indexes and the detection ratio of heavy metal are selected to calculate aqueous phase ecological risk indexes, biological phase ecological risk indexes and solid phase ecological risk indexes respectively, the heavy metal optimal control pollutant screening model is built, and heavy metal with high comprehensive ecological risk indexes is screened as the heavy metal optimal control pollutants of the river in a research region. The built model is applied to evaluation of the combined effect of five toxic heavy metal pollutants of the Songhua River, and the research conclusion is matched with correlational research results of other scholars about the Songhua River. The model is used for screening the heavy metal optimal control pollutants based on the river ecosystem.

Description

technical field [0001] The invention relates to a modeling method for a screening model of heavy metal priority pollutants, and relates to the technical field of river ecosystem risk assessment. Background technique [0002] With the continuous expansion of industrial production scale and the rapid development of urbanization, a large amount of heavy metals entering the environment have an impact on biological individuals and populations, which in turn have adverse ecological effects on the ecosystem. If the heavy metal exceeds the tolerance limit of the human body, it will cause acute or chronic poisoning of the human body, leading to carcinogenic, teratogenic and mutagenic phenomena, which will cause great harm to the human body (Wang & Zhang, 2012). Heavy metal pollution has become an important content of water environmental pollution assessment (Liu et al., 2006), and has been highly concerned by scholars at home and abroad. Risk assessment, such as sediments (Burton, 2...

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Problems solved by technology

Heavy metal pollution has become an important content of water environmental pollution assessment (Liu et al., 2006), and has been highly concerned by scholars at home and abroad. Risk assessment, such as sediments (Burton, 2010; Wu et at., 2013; Azmat et al., 2014), fish bodies (Tuzen M, 2009; Liu et al., 2013) or water bodies (Tao et al., 2013 ; Wang et al., 2010), etc., but there is no report on the comprehensive pollution effect of heavy metals in the three-phase space of rivers

In addition, regarding the research on the optimal control of pollutants in the water environment, a variety of screening methods have been proposed at home and abroad, but most of them are used for the screening of organic matter, and there are not many studies on heavy metals that are more harmful to the human body (Xu et al., 2013)

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