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Assessment of persistent organic pollutants in soil and sediments from an urbanized flood plain area
Environmental Geochemistry and Health ( IF 4.2 ) Pub Date : 2021-02-07 , DOI: 10.1007/s10653-021-00839-9
Bhupander Kumar 1 , Virendra Kumar Verma 1 , Meenu Mishra 1 , Piyush 2 , Vatsala Kakkar 2 , Amrapali Tiwari 2 , Sanjay Kumar 1 , Vijay Prakash Yadav 1 , Prashant Gargava 1
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Polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs) and phenolic compounds (PCs) are persistent organic compounds. Contamination of these potentially toxic organic pollutants in soils and sediments is most studied environmental compartments. In recent past, studies were carried out on PAHs, OCPs and PCs in various soils and sediments in India. But, this is the first study on these pollutants in soils and sediments from an urbanized river flood plain area in Delhi, India. During 2018, a total of fifty-four samples including twenty-seven each of soil and sediment were collected and analyzed for thirteen priority PAHs, four OCPs and six PCs. The detected concentration of ∑PAHs, ∑OCPs and ∑PCs in soils ranged between 473 and 1132, 13 and 41, and 639 and 2112 µg/kg, respectively, while their concentrations in sediments ranged between 1685 and 4010, 4.2 and 47, and 553 and 20,983 µg/kg, respectively. PAHs with 4-aromatic rings were the dominant compounds, accounting for 51 and 76% of total PAHs in soils and sediments, respectively. The contribution of seven carcinogen PAHs (7CPAHs) in soils and sediments accounted for 43% and 61%, respectively, to ∑PAHs. Among OCPs, p, p’-DDT was the dominant compound in soils, while α-HCH was found to be dominated in sediments. The concentrations of ∑CPs (chlorophenols) were dominated over ∑NPs (nitrophenols) in both the matrices. Various diagnostic tools were applied for the identification of their possible sources in soil and sediments. The observed concentrations of PAHs, OCPs and PCs were more or less comparable with the recently reports from various locations around the world including India. Soil quality guidelines and consensus-based sediment quality guidelines were applied for the assessment of ecotoxicological health effect.



中文翻译:

城市化洪泛区土壤和沉积物中持久性有机污染物的评估

多环芳烃 (PAH)、有机氯农药 (OCP) 和酚类化合物 (PC) 是持久性有机化合物。土壤和沉积物中这些潜在有毒有机污染物的污染是研究最多的环境区室。最近,对印度各种土壤和沉积物中的 PAHs、OCPs 和 PCs 进行了研究。但是,这是对印度德里城市化河流泛滥平原地区土壤和沉积物中这些污染物的首次研究。2018 年,共收集了 54 个样品,其中土壤和沉积物各 27 个,分析了 13 种优先多环芳烃、4 种 OCP 和 6 种 PC。土壤中∑PAHs、∑OCPs和∑PCs的检测浓度分别为473和1132、13和41、639和2112 µg/kg,而它们在沉积物中的浓度分别介于 1685 和 4010、4.2 和 47 以及 553 和 20,983 µg/kg 之间。具有 4 个芳香环的多环芳烃是主要化合物,分别占土壤和沉积物中多环芳烃总量的 51% 和 76%。土壤和沉积物中的 7 种致癌物质 PAHs (7CPAHs) 对 ∑PAHs 的贡献分别占 43% 和 61%。在 OCP 中,p, p' -DDT 是土壤中的主要化合物,而 α-HCH 被发现在沉积物中占主导地位。在这两种基质中,∑CP(氯酚)的浓度高于∑NP(硝基酚)的浓度。应用了各种诊断工具来确定它们在土壤和沉积物中的可能来源。观察到的 PAH、OCP 和 PC 的浓度或多或少与最近来自世界各地(包括印度)的报告相当。应用土壤质量指南和基于共识的沉积物质量指南来评估生态毒理学健康效应。

更新日期:2021-02-07
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