Metallic species in ambient particulate matter at rural and urban location of Delhi.
Metallic species in ambient particulate matter at rural and urban location of Delhi.
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DOI：
10.1016/j.jhazmat.2009.10.047
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发表时间：
2010-03
影响因子：
13.6
通讯作者：
V. Shridhar;P. Khillare;Tripti Agarwal;S. Ray
中科院分区：
文献类型：
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作者：
V. Shridhar;P. Khillare;Tripti Agarwal;S. Ray
在本研究中，对印度德里农村和城市地区的悬浮颗粒物中的14种金属(6种地壳金属和8种痕量金属)进行了量化。用玻璃纤维过滤器收集颗粒物为期一年(2003年9月至2004年8月)。经秩和检验，城区TSP浓度显著高于农村(P=0.47)。城区土壤SPM浓度冬季最高，农村土壤夏季最高。计算富集系数(EF)和变异系数(CV)以评估元素浓度数据的变异性。痕量金属，即。铅、镉、铜和锌在两个地点都高度富集，但城市地点的锌和铜的Ef是农村地点的2-3倍。在城市现场，痕量和地壳金属浓度的变异性较小。在市区，金属主要来自周围的建筑和工业活动。在农村地区，再悬浮和被风吹起的尘埃似乎是观测到的元素浓度的来源。
In the present study 14 metallic species (six crustal and eight trace metals) were quantified in the suspended particulate matter (SPM) at a rural and urban location of Delhi, India. Particulate matter was collected on glass fiber filters for a period of one year (from September 2003 to August 2004). Rank sum test revealed that the TSP concentration at the urban site was significantly (P=0.47) higher as compared to the rural site. Urban site showed highest SPM concentration during winter while rural site during summer. Enrichment factor (EF) and coefficient of variation (CV) were calculated to assess the variability of elemental concentration data. Trace metals viz. Pb, Cd, Cu and Zn were observed to be highly enriched at both the sites, but EF for Zn and Cu was 2–3 times higher at the urban site as compared to the rural site. Trace and crustal metal concentration displayed less variability at the urban site. In the urban area, metals were mainly found to come from construction and industrial activities in surrounding. At the rural site, re-suspended and wind-blown dust appeared to be the source of observed elemental concentration.