Role of black carbon in soil distribution of organochlorines in Lesser Himalayan Region of Pakistan

Ali, Usman and Riaz, Rahat and Sweetman, Andrew James and Jones, Kevin C. and Li, Jun and Zhang, Gan and Malik, Riffat Naseem (2018) Role of black carbon in soil distribution of organochlorines in Lesser Himalayan Region of Pakistan. Environmental Pollution, 236. pp. 971-982. ISSN 0269-7491

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Black carbon and total organic carbon (TOC) along with organochlorines (OCs) were analyzed in soils from four sampling zones of Lesser Himalayan Region based on source proximity/anthropogenic influences along the altitude. CTO-375 method was used for BC analysis while OCs were analyzed by GC-MS/MS system. BC and TOC ranged between 0.16–1.77 and 6.8–41.3 mg g−1 while those of OCPs and PCBs ranged between 0.69 and 5.77 and 0.12–2.55 ng g−1, respectively. ∑DDTs were the dominant (87.9%) among OCPs while tri- and tetra- (65.5%) homologue groups among PCBs. Hexa-PCBs, however also showed higher contribution (20.4%) in the region. Source diagnostic ratios of DDE + DDD/DDT (0.1–1.53) indicated both fresh and old input while α-HCH/γ-HCH (0.19–2.49) showed presence of lindane in the region. Higher concentration of OCs were observed in Zone C at altitudinal range of 737–975 masl that are close to the human influences and potential sources of POPs. The results of linear regression analysis revealed potential input of BC in soil distribution of OC concentrations in the region. Black carbon's potential role in OCs distribution in soils of Lesser Himalaya.

Item Type:
Journal Article
Journal or Publication Title:
Environmental Pollution
Uncontrolled Keywords:
?? black carboncto-375gc-mslesser himalayan regionocpspcbstoxicologypollutionhealth, toxicology and mutagenesis ??
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Deposited On:
28 Apr 2020 08:10
Last Modified:
15 Jul 2024 19:59