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长江口湿沉降汞的时间分布及潜在生态危害
引用本文:张国玉,周立旻,郑祥民,黄文丹.长江口湿沉降汞的时间分布及潜在生态危害[J].城市环境与城市生态,2010(2):1-4.
作者姓名:张国玉  周立旻  郑祥民  黄文丹
作者单位:华东师范大学地理信息科学教育部重点实验室,上海200062
基金项目:国家自然科学基金(40701195);上海市优秀学科带头人项目(07XD14010);中国博士后基金项目和中国博士后基金特别资助项目(200801192)
摘    要:于2008年2月-2009年1月逐月采集长江口右岸陈行采样点的大气湿沉降样品,测试样品的总汞、溶解态汞浓度。分析结果显示,不同月份湿沉降中各形态汞的浓度变化较大,其中总汞浓度变化范围在0.09-0.45μg/L,体积加权平均值为0.22μg/L,总汞沉降通量高达199.79μg/(m2.a),远高于其它地区,该区域的大气已经受到一定程度的汞污染。总汞、颗粒态汞月沉降量与降水量呈明显的正相关关系(除6月份),总汞浓度与降水量在汛期(6-9月份)具有良好的负相关性,大气湿沉降汞的形态受到人为活动产生的颗粒物的影响,颗粒态汞占总汞比例变化范围在14%-89%之间,平均为62%。以地表水Ⅲ类标准0.1μg/L为评价标准,长江口湿沉降汞的潜在生态危害系数高,全年湿沉降汞平均值属于强生态危害范围。

关 键 词:湿沉降汞  浓度  降水量  长江口

Temporal Distribution and Potential Hazards of Wet Deposition Mercury in Yangtse River Estuary
ZHANG Guo-yu,ZHOU Li-min,ZHENG Xiang-min,HUANG Wen-dan.Temporal Distribution and Potential Hazards of Wet Deposition Mercury in Yangtse River Estuary[J].Urban Environment & Urban Ecology,2010(2):1-4.
Authors:ZHANG Guo-yu  ZHOU Li-min  ZHENG Xiang-min  HUANG Wen-dan
Institution:(Key Laboratory of Geographic Information Science of Education Ministry,East China Normal University,Shanghai 200062,China)
Abstract:In order to determine the concentration of total mercury(HgT) and dissolved mercury(HgD) in precipitation of the Yangtse River Estuary,one precipitation monitoring site was established in Chenhang,Baoshan District.The mercury concentrations of the samples,collected from February 2008 to January 2009,were provided by cold vapour atomic fluorescence spectrometry.The result showed that the concentration of HgT ranged from 0.09 to 0.45 μg/L,and the average was 0.22 μg/L.The wet deposition fluxes of HgT here reached to 199.79 μg/(m2·a) and higher than other areas,which indicated the atmosphere of the Yangtse River Estuary had been polluted by mercury.The conspicuous negative correlation was observed between concentration of HgT and rainfall during the flood season(from June to September),and the conspicuous positive relationships could be observed between the concentration of HgT,HgP with rainfall respectively(except June).The concentration of HgP reached 14% to 89% in the HgT,average was 62%,which demonstrated that the formations of wet deposition mercury were largely affected by particulate matter which was produced by artificial disturbance.The wet deposition mercury was estimated by the method of Potential Ecological Risk Index(PERI),and the earth's surface water III kind standard(limit-0.1 μg/L) was chosen as the estimated standard.The result indicated that the Eir of wet deposition mercury on Yangtse River Estuary was significant high,and the average of the wet deposition mercury in the Yangtse River Estuary was significantly heavy in ecological risk.
Keywords:wet deposition mercury concentration precipitation Yangtse River Estuary
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