铅同位素示踪在大气降尘重金属污染来源解析中的应用

doi:10.13278/j.cnki.jjuese.201605208

吉林大学学报(地球科学版) ›› 2016, Vol. 46 ›› Issue (5): 1520-1526.doi: 10.13278/j.cnki.jjuese.201605208

铅同位素示踪在大气降尘重金属污染来源解析中的应用

胡恭任^1,2, 于瑞莲¹, 胡起超¹, 温先华¹, 刘贤荣¹, 张希琳¹

1. 华侨大学环境科学与工程系, 福建厦门 361021;
2. 东华理工大学核资源与环境教育部重点实验室, 南昌 330013

收稿日期:2016-01-05 出版日期:2016-09-26 发布日期:2016-09-26
作者简介:胡恭任(1966-),男,教授,主要从事环境地球化学方面的研究,E-mail:grhu@hqu.edu.cn
基金资助:
国家自然科学基金项目（21377042，21477042）；福建省自然科学基金项目（2014J01176）；华侨大学2014年国家级大学生创新创业训练计划项目（201410385018）

Tracing Heavy Metal Sources in the Atmospheric Dustfall Using Stable Lead Isotope

Hu Gongren^1,2, Yu Ruilian¹, Hu Qichao¹, Wen Xianhua¹, Liu Xianrong¹, Zhang Xilin¹

1. Department of Environmental Science and Engineering, Huaqiao University, Xiamen 361021, Fujian, China;
2. Key Laboratory of Nuclear Resources and Environment, Ministry of Education, East China University of Technology, Nanchang 330013, China

Received:2016-01-05 Online:2016-09-26 Published:2016-09-26
Supported by:
Supported by National Natural Science Foundation of China(21377042,21477042),National Natural Science Foundation of Fujian Province(2014J01176) and Innovation and Entrepreneurship Training Program of National College Students, Huaqiao University (201410385018)

摘要/Abstract

摘要：

为了分析大气降尘中铅的污染来源，解析各污染源对大气降尘铅的相对贡献值，在厦门市不同功能区采集了29个大气降尘样品。用热电质谱仪测定了大气降尘的总铅同位素组成，用ICP-MS测定样品酸可溶相铅同位素组成。结果表明，厦门市大气降尘铅同位素²⁰⁶Pb/²⁰⁷Pb值变化较大，为1.111 9~1.173 8；酸可溶相铅²⁰⁶Pb/²⁰⁷Pb值与福建土壤残渣相²⁰⁶Pb/²⁰⁷Pb值相差较大，表明厦门市大气降尘受人类活动来源铅的影响较大；酸可溶相铅²⁰⁶Pb/²⁰⁷Pb值明显小于总量铅²⁰⁶Pb/²⁰⁷Pb值。铅同位素示踪表明，厦门市大气降尘铅主要来源是燃煤，其次是自然来源和汽车尾气。三元混合模型分析表明，燃煤、自然来源、汽车尾气对厦门市大气降尘总量铅的贡献率分别为48.57%、20.29%、31.14%。

关键词: 大气降尘, 铅同位素, 来源分析, 厦门市

Abstract:

In order to identify the sources of lead pollution in the atmospheric dustfall, as well as comfirm the contribution of each source to such pollution. We obtained 29 atmospheric dustfall samples in the different areas of Xiamen City. Total Pb isotopic composition of each sample was analyzed by thermal mass spectrometry and acid soluble Pb isotopic ratios were determined by ICP-MS. The results indicated that dustfall Pb isotope of ²⁰⁶Pb/²⁰⁷Pb in Xiamen City varied widely with the ranges of 1.111 9 to 1.173 8.Pb isotope of ²⁰⁶Pb/²⁰⁷Pb in acid solution was different from the ratios in residual form soil of Fujian, indicating the powerful impact of external lead sources. Pb isotopic composition of acid solution decreased significantly than total Pb isotopic composition. Lead isotope tracing techniques showed coal-fired was the main source of lead pollution in Xiamen City dustfall, followed by nature source and vehicle exhaust. Total and acid soluble Pb isotope composition of coal pile was closed to coal-fired, suggesting coal pile was a potential source. The results of ternary hybrid model were as follows: the contribution of coal-fired, nature source and vehicle exhaust to total lead in dustfall were 48.57%, 20.29% and 31.14%, respectively.

Key words: dustfall, lead isotopic, source apportionment, Xiamen City

中图分类号:

X823

胡恭任, 于瑞莲, 胡起超, 温先华, 刘贤荣, 张希琳. 铅同位素示踪在大气降尘重金属污染来源解析中的应用[J]. 吉林大学学报(地球科学版), 2016, 46(5): 1520-1526.

Hu Gongren, Yu Ruilian, Hu Qichao, Wen Xianhua, Liu Xianrong, Zhang Xilin. Tracing Heavy Metal Sources in the Atmospheric Dustfall Using Stable Lead Isotope[J]. Journal of Jilin University(Earth Science Edition), 2016, 46(5): 1520-1526.

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铅同位素示踪在大气降尘重金属污染来源解析中的应用

Tracing Heavy Metal Sources in the Atmospheric Dustfall Using Stable Lead Isotope

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