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作 者:吴敏 张俊 梅曼 雷俊生 李万锁 王小康 杨富雨 WU Min;ZHANG Jun*;MEI Man;LEI Jun-sheng;LI Wan-suo;WANG Xiao-kang;YANG Fu-yu(School of Resources and Civil Engineering,Suzhou University,Suzhou 234000,China)
机构地区:[1]宿州学院资源与土木工程学院,安徽宿州234000
出 处:《环境生态学》2025年第3期17-24,共8页Environmental Ecology
基 金:安徽教育厅重点科研项目(2023AH052238);安徽省教育厅优秀青年教师培育一般项目(YQYB2023052);宿州学院2022年博士(后)科研启动基金项目(2022BSK010,2024BSH005);宿州学院大学生创新创业训练计划项目(YBXM23-032)资助。
摘 要:沉积物不仅记录着环境变化历史,同时也是评估其污染状况的重要载体。通过研究沉积物中的重金属含量及特征,可以了解各项工农业活动对自然环境的影响。本研究通过采集长江干流铜陵段沉积物柱状剖面样,测定其重金属含量,利用单因子指数法、内梅罗综合指数法、地累积指数法和潜在生态风险指数法等方法对其重金属污染状况进行评价。研究结果表明:1)柱状样上部沉积物中Ni、As、Pb、Cu、Zn等重金属含量变化小,分布较均匀,而V、Cr、Mn、Cd等重金属含量变化较大,尤其在埋深77~104 cm中相对富集明显;柱状样下部沉积物中V、Cr、Cd等重金属含量变化小,分布较均匀,而Mn、Ni、As、Pb、Cu、Zn等重金属的含量变化大,尤其在埋深178~200 cm相对富集明显。2)4种评价方法表明该研究区域沉积物污染较严重,尤其是Cd元素污染超标严重,需要进一步加强防范和处理。Sediments not only record the history of environmental changes,but also are an important carrier for assessing environmental pollution.By studying the content and characteristics of heavy metals in sediments,we can understand the impact of various industrial and agricultural activities on the natural environment.In this study,the content of heavy metals was determined by collecting the columnar section of the sediments in Tongling section of the main stream of the Yangtze River.The pollution status of heavy metals was evaluated by single factor index method,Nemero comprehensive index method,geoaccumulation index method and potential ecological risk index method.The results showed that:1)The contents of Ni,As,Pb,Cu,Zn and other heavy metals in the upper sediments of the columnar samples changed little and were evenly distributed,while the contents of V,Cr,Mn,Cd and other heavy metals changed greatly,especially in 77~104 cm.The contents of heavy metals such as V,Cr and Cd in the sediments of the lower part of the columnar sample changed little and distributed evenly,while the contents of heavy metals such as Mn,Ni,As,Pb,Cu and Zn changed greatly,especially in 178~200 cm.2)Four evaluation methods show that the pollution in the study area have been seriously polluted.In particular,Cd element pollution exceeds the standard seriously,it is necessary to further strengthen prevention and treatment.
分 类 号:X825[环境科学与工程—环境工程]
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