Regional protection aquatic organism water quality benchmark derivation method for optimally controlling heavy metal pollutant chromium

Abstract

The invention provides a regional protection aquatic organism water quality benchmark derivation method for optimally controlling heavy metal pollutant chromium, which comprises the following steps: collecting and screening toxicity data, screening tested species, importing the screened toxicity data into China-WQC, carrying out model fitting by taking lgSMAV as an abscissa and cumulative probability as an ordinate, determining an optimal fitting model according to a determination coefficient r2, a root mean square RMSE, a residual sum of squares SSE and a K-S test result of model fitting, obtaining a 5% species hazard concentration HC5, selecting an evaluation factor 2, and determining a short-term reference value CMC and a long-term reference value CCC of the fresh water aquatic organisms in combination with a corresponding acute-chronic ratio. According to the method, the difference of water quality standards under different biological zones is fully considered in the derivation process, the national conditions and water environment management criteria of China are better met, and over-protection and under-protection can be effectively avoided. A reference can be provided for deriving a regional heavy metal protection aquatic organism water quality standard.

Description

technical field [0001] The invention relates to the field of water quality benchmark derivation, and provides a water quality benchmark derivation method for regional protection of aquatic organisms for optimal control of heavy metal pollutant chromium. Background technique [0002] Water quality benchmarks are the scientific basis for determining water environment management standards, as well as the scientific basis for evaluating water environment quality and determining the goals and directions of water environment protection. Water environment benchmarks and standards together constitute an important criterion for water environment management, in order to protect aquatic organisms from negative ecological effects caused by pollutants in water bodies, and play an important role in environmental protection. Water quality benchmarks are regional, and the characteristics of biota in different regions are different, and the environmental behavior and toxicological effects of...

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Problems solved by technology

[0003] Although my country has promulgated a series of laws and regulations and related water quality standard documents, most of the derivation of water quality benchmark values ​​are based on developed countries such as the United States and Europe, and the selection of toxicity data cannot systematically and comprehensively utilize native aquatic organis

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