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太原市PM10及其污染源中碳的同位素组成
引用本文:张建强,王莹,彭林,白慧玲,牟玲,刘效峰,宋翀芳.太原市PM10及其污染源中碳的同位素组成[J].中国环境科学,2012,32(6):968-972.
作者姓名:张建强  王莹  彭林  白慧玲  牟玲  刘效峰  宋翀芳
作者单位:太原理工大学环境科学与工程学院,山西太原,030024
基金项目:国家自然科学基金资助项目
摘    要:通过采集太原市PM10及其主要源(煤烟尘、机动车尾气尘、土壤风沙尘)样品,结合离线分步加热氧化法和同位素质谱仪测定了颗粒物中有机碳(OC),元素碳(EC)和总碳(TC)的同位素组成, 并探讨了太原市PM10中碳的来源.结果表明,太原市冬季、春季PM10中OC、EC和TC的碳同位素组成分别是-34.7‰、-23.5‰、-23.9‰和-30.5‰、-23.1‰、-23.9‰; 煤烟尘中OC、EC和TC的碳同位素组成分别是-26.5‰、-23.2‰、-23.6‰,土壤风沙尘分别为-24.6‰、-14.1‰、-17.3‰,汽油车和柴油车尾气尘分别为-27.7‰、-25.5‰、-27.0‰和-25.7‰、-24.3‰、-24.8‰. EC和TC的同位素组成是区分土壤风沙尘较好的标识指标,TC的同位素组成是汽油车尾气尘较好的标识指标;利用二元复合计算公式结果显示土壤风沙尘中OC、EC占TC的百分含量分别为30%、70%;煤烟尘中OC、EC占TC的百分含量分别为11%、89%;汽油车尾气尘中OC、EC占TC的百分含量分别为78%、22%,柴油车尾气尘中OC、EC占TC的百分含量分别为36%、64%;太原市PM10中的TC和EC主要来源于煤烟尘,OC少部分来源于机动车尾气排放,另外还有其他的重要贡献源.

关 键 词:有机碳  元素碳  总碳  碳同位素  
收稿时间:2011-09-22;

Isotopic compositions of carbon in PM10 and its emission sources in Taiyuan
ZHANG Jian-qiang , WANG Ying , PENG Lin , BAI Hui-ling , MU Ling , LIU Xiao-feng , SONG Chong-fang.Isotopic compositions of carbon in PM10 and its emission sources in Taiyuan[J].China Environmental Science,2012,32(6):968-972.
Authors:ZHANG Jian-qiang  WANG Ying  PENG Lin  BAI Hui-ling  MU Ling  LIU Xiao-feng  SONG Chong-fang
Institution:(College of Environmental Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
Abstract:Carbon isotopic composition of organic carbon(OC),elemental carbon(EC) and total carbon(TC) in PM10 and major emission sources(coal combustion dust,vehicle exhaust dust and soil dust) were studies by off-line step-heating oxidation and isotope mass spectrometry detecting.Then the emission sources of carbon in Taiyuan were discussed based on its carbon isotopic compositions.As the results shown,the carbon isotopic values of OC,EC and TC(δ13COC,δ13CEC and δ13CTC) in PM10 in Taiyuan were 34.7‰,-23.5‰,-23.9‰ in winter and-30.5‰,-23.1‰,-23.9‰ in spring,respectively.And δ13COC,δ13CEC and δ13CTC were-26.5‰,-23.2‰ and-23.6‰ in coal dust,-24.6‰,-14.1‰ and-17.3‰ in soil dust,27.7‰,-25.5‰ and-27.0‰ in gasoline car exhaust dust and-25.7‰,-24.3‰ and-24.8‰ in diesel exhaust dust,respectively.Generally,EC and TC were used for the indicator of carbons emitted from the soil dust,and TC for the gasoline exhaust dust.Based on the binary complex formula,OC and EC accounted for 30% and 70% of TC in the soil dust,11% and 89% in coal combustion dust,78% and 22% in gasoline vehicle exhaust dust,36% and 64% in diesel car exhaust dust,respectively.TC and EC in PM10 in Taiyuan were mainly from coal combustion dust.Besides vehicle exhaust dust,OC might be emitted by other important sources.
Keywords:organic carbon  elemental carbon  total carbon  carbon isotopic
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