中文摘要：研究分析了印度加尔各答市8种常见食物、街道灰尘、煤炭、柴油、沉积物、铅矿和雨水中铅同位素比值，分析了食物中铅污染的来源及其污染程度。结果表明，柴油是食品中铅污染的主要来源，大气中铅对食品中铅污染的贡献值为68.48%-86.66%。
外文摘要：Lead isotopic ratios (LIR) of eight common food items, street dust, coal, diesel, sediments, lead ore and rainwater from India have been reported for the first time in this paper. This study characterized the source and extent of lead pollution in the different foodstuff consumed in Kolkata, a major metropolis of eastern India. The atmospheric lead input to the food items, sold openly in busy roadside markets of the city, has been quantified. The mean 207/206 and 208/206 LIRs of the eight food items ranged from 0.8847 to 0.8924 and 2.145 to 2.167, respectively. Diesel had the highest mean 207/206 and 208/206 values of 0.9015 and 2.1869, respectively, apart from the lead ore. The food items had a mean lead concentration between 3.78 and 43.35 mg kg(-1). The two ratio scatter plots of all the different environmental matrices were spread linearly between the uncontaminated Ichapur sediment and diesel. The 207/206 LIRs of the coal with a mean of 0.8777 did not fall in the linear trend, while the street dust and food samples overlapped strongly. The rainwater sample had a 207/206 LIR of 0.9007. Contaminated sediments in Dhapa, the repository of the city's municipal garbage, had a mean 207/206 LIR of 0.8658. The corresponding value obtained from the sewage-fed vegetable grown there was 0.8058. The present study indicated that diesel was one of the main contributor to Pb pollution. The atmospheric lead contribution to the food items was in the range of 68.48-86.66 %.
外文关键词：Pollution; Market; Food; Kolkata; Lead isotopic ratios
作者：Das, A ; Krishna, KVSS; Kumar, R; Das, A ; Sengupta, S; Ghosh, JG
作者单位：Laser Ablat Multicollector ICPMS LAMCI Lab
期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
期刊影响因子：2.76
出版年份：2016
出版刊次：11
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