生态环境学报Issue(1)：157-163,7.
天津城市道路灰尘重金属污染特征
Characteristics of heavy metal pollution in urban street dust of Tianjin
摘要
Abstract
Dust samples were collected from 93 sites of urban streets in Tianjin for the heavy metals (Cd, Cr, Cu, Ni and Pb) pollution study. Atomic absorption spectrometer was applied for heavy metal content determination, and Kriging analysis of ArcGIS was applied to analyze the spatial distribution of heavy metals in street dust of urban area. Pearson correlative analysis and principal component analysis were used to distinguish the main sources of heavy metals. Results showed that the particle size of road dust presented two peaks distribution, main of the street dust was fine and the particle size was non-normal distribution which led to high contents of heavy metals. The coefficient of variance and the difference in the spatial distribution of organic matter was large because of the influence of intense human activities. The average contents of Cd (0.99 mg·kg-1), Cr (121.41 mg·kg-1), Cu (100.62 mg·kg-1), Ni (43.35 mg·kg-1), Pb (61.48 mg·kg-1) in street dust of urban area were 11.00 times, 1.44times, 3.49 times, 1.30 times and 2.93 times higher than them of the soil background in Tianjin city respectively. The spatial distribution of Cd, Cr and Cu had large deviation. Pearson correlative analysis indicated that there were significant positive correlation between Cu and Ni (P<0.01), Cr and Cu (P<0.05), Pb and organic matter (P<0.05). Principle component analysis indicated that human activities contributed 33.050% of the heavy metals accumulation in street dust, and nature factors contributed 57.315%. Heavy metals pollution in urban street dust of Tianjin mainly affected by the multi-factors, traffic and industrial activities were the important pollution sources of them.关键词
道路灰尘/重金属/污染特征/天津Key words
street dust/heavy metal/pollution characteristics/Tianjin分类
资源环境引用本文复制引用
孙宗斌,周俊,胡蓓蓓,王祖伟,孟伟庆,王中良..天津城市道路灰尘重金属污染特征[J].生态环境学报,2014,(1):157-163,7.基金项目
国家自然科学基金项目（41372373；40973078）；国家自然科学青年基金项目（41301221；41301096）；教育部新世纪人才计划（NCET-10-0954）；国家科技支撑计划项目（2012BAC07B02）；天津市高校“优秀青年教师资助计划” （）
