收稿日期: 2016-01-15
网络出版日期: 2016-04-30
基金资助
国家自然科学基金资助项目(21477072); 国家杰出青年科学基金资助项目(11025526); 上海大学长江学者和创新团队发展计划资助项目(IRT13078)
Seasonal and spatial distributions of chlorinated PAHs in road dust from downtown Shanghai
Received date: 2016-01-15
Online published: 2016-04-30
选取了上海中心城区的道路灰尘作为研究对象, 运用气相色谱-质谱(gas chromatography-mass spectrometry, GC/MS)联用技术对道路灰尘中20种氯代多环芳烃(chlorinated polycyclic aromatic hydrocarbons, ClPAHs)进行了检测, 分析了道路灰尘中ClPAHs的时空分布特征和毒性当量(toxic equivalent quantity, TEQ)等. 结果表明, 11种ClPAHs的检出率均大于50%, 说明ClPAHs在上海中心城区道路灰尘中普遍存在. 研究区域内的ClPAHs浓度呈现出明显的季节特征, 即冬季>夏季, 冬季∑ClPAHs浓度最高为24.9 ng/g干重. 在空间分布上, 交通枢纽区浓度最高(冬季为21.2 ng/g干重, 夏季为10.7 ng/g干重), 建筑施工区、商业区次之, 近绿地区最低. 在道路灰尘中最主要的两个组分是6-ClBaP和7-ClBaA. ClPAHs在冬季和夏季的TEQ范围分别为0.01~4.81和0.01~1.78 ng-TEQ/g干重, 其中
7-ClBaA在ClPAHs总毒性当量中的贡献最大.
吴明红1, 王玉洁1, 刘文龙1, 唐量1, KANNAN Kurunthachalam2, OHURA Takeshi3, 马静1 . 上海中心城区道路灰尘中氯代多环芳烃的时空分布特征[J]. 上海大学学报(自然科学版), 2016 , 22(2) : 131 -140 . DOI: 10.3969/j.issn.1007-2861.2016.01.001
Concentrations of twenty chlorinated polycyclic aromatic hydrocarbons (ClPAHs) in road dust from downtown Shanghai were analyzed using gas chromatographymass spectrometry (GC/MS). Eleven of twenty ClPAH congeners were found in road dust samples with more than a detection rate of 50%, indicating that ClPAHs were ubiquitous in road dust in downtown Shanghai. Seasonal variability of ClPAHs concentrations were observed, with higher concentrations in winter than in summer. The highest concentration of total ClPAHs was 24.9 ng/(g dw) (dw means dry weight) in winter. Concentrations of
ClPAHs varied greatly in different functional areas, In particular, the highest concentration was found in transportation hub regions (21.2 ng/(g dw) in winter and 10.7 ng/(g dw) in summer) followed by construction and commercial areas, while the lowest concentration was found in green areas. The compositional analysis showed that 6-ClBaP and 7-ClBaA were the two most important components in the road dust samples. The toxic equivalent
quantity (TEQ) ranges of ClPAHs were 0.01~4.81 ng-TEQ/(g dw) in winter and 0.01~1.78 ng-TEQ/(g dw) in summer, and the toxic equivalent of 7-ClBaA contributed the most.
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