Water quality,natural chemical weathering and ecological risk assessment of the contaminated area of vanadium ore in Yinhua River,China:Evidence from major ions and trace elements

作     者：Delu Li Yong Xu Xiaotuan Zhang Zhidong Yang Shaofei Wang Qianyang He Zhe Jia Delu Li;Yong Xu;Xiaotuan Zhang;Zhidong Yang;Shaofei Wang;Qianyang He;Zhe Jia

作者机构：Shaanxi Provincial Key Laboratory of Geological Support for Coal Green ExploitationXi’an University of Science and TechnologyXi’an 710054China Geological Research Institute for Coal Green MiningXi’an University of Science and TechnologyXi’an 710054China College of Geology and EnvironmentXi’an University of Science and TechnologyXi’an 710054China Shaanxi Institute of Geological SurveyXi’an 710054China College of GeomaticsXi’an University of Science and TechnologyXi’an 710054China 

出 版 物：《Acta Geochimica》 (地球化学学报（英文）)

年 卷 期：2022年第41卷第1期

页      面：84-99页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 0815[工学-水利工程] 0837[工学-安全科学与工程] 

基　　金：supported by National Natural Science Foundation of China(No.4210021463) Natural Science Basic Research Program of Shaanxi Province(No.2020JQ-744) China Postdoctoral Science Foundation(No.2020M673443) Shaanxi Provincial Education Department general special project(No.21JK0775) Public Welfare Geology Project of Shaanxi Province(No.201907)。 

主　　题：Vanadium ore belt Surface water Water contamination Major ions Trace elements 

摘      要：There are abundant vanadium ores in the Cambrian strata in southern Shaanxi,China.Many years of mining activities and surface leaching have polluted the surface water to a certain extent,but the researches on the water quality characteristics and pollution degree are relatively weak.This contribution was organized to investigate the surface water quality by general parameters,including TDS,Eh,pH,DO,TOC,COD,and EC,in the vanadium ore belt(Yinhua River basin).Major ions were determined to detect the water type and natural chemical weathering,while trace elements were used to illustrate their geochemical characteristics and ecological risk assessment of heavy metals.The study found that the surface water was weakly alkaline and mainly dominated from normal to pool grade.The particle size with1000–10,000 nm of suspended particles was the main carrier of organic matter.The concentration of HCO_(3)^(-)and SO_(4)^(2-)in the anions and Ca^(2+)and Mg^(2+)ions in the cations were relatively high,and the water type was Ca-Mg-HCO_(3)-SO_(4) type.Rock weathering had a great influence on surface water,and the weathering products were mainly silicate and carbonate.Compared with the Type river,the contents of V elements showed an obvious positive anomaly,which may be affected by mining activities of vanadium ore and the annual leaching of the tailings pond.As and Cd in the surface water was polluted seriously.The integrated pollution index suggested that the surface water pollution was serious,and the main stream was more serious with the increasing tailings ponds.