淮河沉积物中镉的历史变迁及污染评价研究  

Study on the Historical Changes and Pollution Assessment of Cadmium in the Sediment Core From the Huaihe River

作　　者：王婕 刘源[2] WANG Jie;LIU Yuan(Traditional Chinese Medicine College,Bozhou University,Bozhou 236800,China;School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]亳州学院中药学院,安徽亳州236800 [2]中国科学技术大学地球和空间科学学院,合肥230026

出　　处：《四川轻化工大学学报（自然科学版）》2021年第6期47-54,共8页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

基　　金：安徽省自然科学基金青年项目(2008085QD174);安徽省高校自然科学研究重点项目(KJ2019A1299);亳州学院博士科研启动基金项目(BZQD201803)。

摘　　要：采用混合酸法(HNO_(3)+HClO_(4)+HF)提取淮河(淮南段)沉积柱样品中重金属镉(Cd)元素,并用电感耦合等离子体原子发射光谱法(ICP-OES)测试样品中镉元素含量,应用^(210)Pb同位素定年技术重建了镉元素在1955—2014年的历史沉积记录,分析了镉元素在近59年的含量分布特征及变化规律,并基于地累积指数法(I_(geo))和富集因子法对重金属镉元素进行污染评价。结果表明,基于平均水平,淮河(安徽段)沉积物没有呈现镉污染,但在个别年份出现富集峰值,且自1950年代,沉积物中镉富集程度逐渐增加。在1985年、1991—1997年、2001年与2005年,沉积物中镉均呈现弱污染水平,表明该地区的工农业发展及20世纪80年代以来水污染事故可能影响了镉的历史沉积。Inductively couple plasma optical emission spectrometry(ICP-OES)is used to determine the content of cadmium(Cd)in the sediment core collect from the Huaihe River(Huainan Section),which is extracted with the method of mixed acids(HNO_(3)+HClO_(4)+HF).The historical deposition record of Cd from 1955 to 2014 is reconstructed by using ^(210)Pb geochronology.The geo-accumulation index(I_(geo))and enrichment factor(E F)are used to evaluate the pollution of heavy metal Cd.The results indicate that the sediments of the Huaihe River(Huainan Section)did not show Cd pollution based on the average level.However,the peak values of Cd are observed in several specific years,and since the 1950s,the degree of Cd enrichment in the sediments has gradually increased.It shows that the Cd pollution is at weak level in the year of 1985,1991-1997,2001,and 2005,which indicate that the historical distribution of Cd may have been affected by the industrial and agricultural development of the region and the water pollution accidents happened since the 1980s.

关 键 词：淮河 沉积柱 镉 历史变迁 污染评价 

分 类 号：P595[天文地球—地球化学] X142[天文地球—地质学]