文章基本信息

标题：Heavy Metals Assessment in Urban Air of National Capital Region of Delhi Using Spider Webs as Bioindicator
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作者：Upasana Bhati ; Sanjay Keshari Das ; Pramod Kumar 等
期刊名称：Journal of Environmental Science and Technology
印刷版ISSN：1994-7887
电子版ISSN：2077-2181
出版年度：2018
卷号：11
期号：1
页码：49-55
DOI：10.3923/jest.2018.49.55
出版社：Asian Network for Scientific Information
摘要：Background and Objective: Delhi represents one of the most polluted cities of the world where the levels of air pollution are alarming. The present study aimed to investigate the efficiency of spider webs as bioindicator of heavy metal pollution in urban air of National Capital Region (NCR) of Delhi. Materials and Methods: The webs of Cyrtophora citricola ( C. citricola ) (Forskål, 1775) were used that were collected from road side areas at five different sites of NCR region. One laboratory spider web was spun to use as a control sample. The webs were digested with concentrated HNO₃. Metal concentrations were analyzed by flame Atomic Absorption Spectrophotometer (AAS) to determine the accumulation (μg g¹) of selected heavy metals (Pb, Zn, Ni, Cd, Cu and Cr) in the webs. Results: The highest concentration of all heavy metals except Cr was recorded in the webs collected from two industrial sites. Also, the mean concentration of all heavy metals except Cr was found to be higher at industrial sites in comparison to residential sites. In the overall area, mean concentration of Zn was found to be highest followed by Pb, Cr, Ni, Cu and Cd. Conclusion: Findings of this study confirm that webs of C. citricola can be used as a bioindicator of heavy metal pollution in air of NCR Delhi and demands for testing the webs of other common spiders of this region for this purpose.