Department of Chemistry, National Institute of Technology, Jamshedpur, Jharkhand, 831014, India.
Center for Analytical Sciences, Kathmandu Institute of Applied Sciences, Kathmandu, Nepal.
Bull Environ Contam Toxicol. 2022 Feb;108(2):243-252. doi: 10.1007/s00128-021-03393-3. Epub 2021 Oct 30.
Polycyclic aromatic hydrocarbons (PAHs) are persistent toxic substances that have ubiquitous presence in water, air, soil, and sediment environments. The growth of PAH toxicities and related ecotoxicology risk in estuary sediment has a serious concern. Present study examined the PAHs concentration, sources, and ecological risk from selected sites in Subarnarekha River estuary (SRE) sediment deposits. The sum of toxic 16 PAHs was ranged from 36.8 to 670.8 ng/g (mean = 223.46 ± 196.35 ng/g). The total PAH concentration varied significantly among the sampling sites (range 511.3 ng/g to 233.8 ng/g) based on allochthonous contaminant loads. Among the 16 compounds, Phen had the highest concentration (40.18 ng/g), followed by Pye (31.86 ng/g), Flur (29.36 ng/g), and NA (19.33 ng/g). Most of the sampling sites contained abundant 3-ring and 4-5-ring PAHs. Based on diagnostic ratios and PCA analysis petroleum combustion, biomass, and coal-burning have been identified as the major sources. The PAHs had high mutagenic equivalent factor and toxic equivalent factor values posing great ecological threats and health risks.
多环芳烃（PAHs）是持久性有毒物质，广泛存在于水、空气、土壤和沉积物环境中。河口沉积物中 PAH 毒性和相关生态毒理学风险的增加引起了严重关注。本研究调查了来自苏班纳雷克哈河河口（SRE）沉积物的选定地点的 PAHs 浓度、来源和生态风险。有毒的 16 种 PAHs 的总和范围为 36.8 至 670.8 ng/g（平均值为 223.46 ± 196.35 ng/g）。基于异源污染物负荷，总 PAH 浓度在采样点之间差异显著（范围为 511.3 ng/g 至 233.8 ng/g）。在 16 种化合物中，菲的浓度最高（40.18 ng/g），其次是苊（31.86 ng/g）、芴（29.36 ng/g）和萘（19.33 ng/g）。大多数采样点都含有丰富的 3 环和 4-5 环 PAHs。基于诊断比和 PCA 分析，石油燃烧、生物质和煤炭燃烧被确定为主要来源。PAHs 具有较高的致突变当量因子和毒性当量因子值，对生态构成了巨大威胁和健康风险。
