广西珊瑚钨锡矿耕作区土壤和玉米汞含量及污染评价  

Mercury Content and Pollution Assessment of Soil and Corn in Farming Area of Shanhu W-Sn Mining District in Guangxi

作　　者：唐专武[1,2] 钱建平[1,2] 莫福金 王远炜 陈珊珊[1,2] 

机构地区：[1]桂林理工大学广西冶金与环境实验中心,广西桂林541004 [2]桂林理工大学地球科学学院,广西桂林541004

出　　处：《环境科学与技术》2015年第2期73-76,共4页Environmental Science & Technology

基　　金：国家自然科学基金(45063001;41073089);中国科学院地球化学研究所环境地球化学国家重点实验室项目(SKLEG8009)

摘　　要：对广西珊瑚钨锡矿周边耕作区土壤和玉米进行采样分析,采集土壤样、玉米样各39个。采用原子荧光测汞仪进行分析测定法,研究土壤和玉米植株的不同部分(根、茎、叶和果)中的汞含量。结果表明,土壤汞含量为(0.130 9±0.058 6)μg/g,玉米植株汞含量为(0.013 8±0.003 1)μg/g。靠近矿区的土壤汞含量高,远离矿区的低;靠近居民区的土壤汞含量最高,尾砂场、废石场的次之。其中有10.3%的土壤样汞含量超过了我国《土壤环境质量标准》(GB 15618-2008)二级标准的最低限值(汞≤0.2μg/g),表明珊瑚钨锡矿周边耕作区土壤具有一定的汞污染。矿区汞污染对农作物植株汞有一定的影响,但是玉米果实汞含量((0.003 5±0.001 1)μg/g)没有超过国家相关标准的限值(汞≤0.02μg/g)。A mercury pollution of soil and com surrounding in farming area of Shanhu W-Sn mining district were surveyed and 39 samples of soil and corn were collected. Using the QM201 atomic fluorescence mercury analyzer, Hg content in soil and different parts of corn plant （root, stem, leaf, fruit） were determined. The mercury content in soil was （0.130 9±0.058 6） Izg/g, corn plants mercury levels was （0.013 8±0.003 1） μg/g. The soil near the mine is with high mercury content, on the contrary, away from is low. the highest mercury levels is in soil near residential areas and the higher mercury levels is in backfilling materials field and waste rock field. Among them, 10.3% of mercury content of these soil samples, higher than the highest allowable value （Hg≤0.2 μg/g） in Soil Environmental Quality Standards （GB 15618-2008）, shows a certain degree of pollution in the farming areas. Mines mercury has an impact on crop plants mercury, but the corn fruits （（0.003 5±0.001 1） μg/g） do not exceed the national standards of mercury limits （Hg≤0.2 μg/g）.

关 键 词：珊瑚钨锡矿 土壤 玉米 汞含量 污染评价 

分 类 号：X830[环境科学与工程—环境工程]