湖南省资江流域娄底段的锑污染和成因分析

Analysis of Antimony Pollution and Its Causes in the Loudi City Section of the Zijiang River Basin in Hu'nan Province

湖南省锑矿资源丰富,全省锑矿采、选、冶主要集中在资江流域,因历史遗留问题,资江流域锑污染问题较为突出,本文通过连续监测典型断面(水厂取水口断面)及水库数据,运用了等数值计算法、推算法等方法,研究了本次事件娄底市入资江干流的锑污染物(Sb)总量及其原因。结果表明,(1)本次事件排放锑总量7.575吨,全部流入资江干流;(2)本次事件发生的原因如下:①资江流域锑本底值高;②近期极端天气叠加影响。本研究成果可为后期资江流域水环境治理和质量管理决策提供科学依据。

The province of Hu'nan is renowned for its abundant antimony mineral resources,with the mining,beneficiation,and smelting operations of antimony ore primarily concentrated in the Zijiang River basin.Due to the historical problems,the antimony pollution problem in the Zijiang River basin is more prominent.This paper investigated the total amounts of antimony(Sb)contaminants in the mainstream of Zijiang Riv-er in Loudi City and its primary causes through the continuous monitoring of typical cross sections(the drinking water treatment plant intake)and reservoir data during this incident by using approaches such as equal value calculation and recursive algorithm.The results show that:(1)The to-tal amount of antimony discharged in this event was 7.575 tons,all of which flowed into the mainstream of Zijiang River.(2)The reasons for this inci-dent are as follows:①The background value of antimony in the Zijiang River Basin is high;②The recent superimposed effects of extreme weather.In summary,this research provides insights into later decision-making on water environment governance and quality management in the Zijiang Riv-er Basin.