Risk assessment of heavy metals and polycyclic aromatic hydrocarbons in ground water samples around the vicinity of an asphalt plant in north central, Nigeria

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-09-19 DOI:10.4314/bcse.v37i6.4

A.A. Mohammed, M.M. Orosun, F.O. Okeola, M.A. Raji, G.O. Tesi, O.J. Yusuph

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Abstract

ABSTRACT. In this study, the concentration and risk of heavy metals and polycyclic aromatic hydrocarbons (PAHs) in 9 composite samples around the vicinity of an Asphalt plant in North Central, Nigeria, was evaluated. Aqua-regia wet digestion was used for heavy metals extraction in the water samples while atomic absorption spectrometry was used quantification. For PAHs, liquid-liquid extraction was used for extraction while gas chromatography-mass spectrometry was used for quantification of PAHs in the extracts. The risk assessment was estimated using the hazard index (HI) and incremental lifetime cancer risk (ILCR) in all the samples studied. The results showed that Cd and Cr were present in concentrations higher than their permissible limits in water set by World Health Organization, while Pb was not detected. Total concentration of 14 PAHs ranged between 6.47–390 mg L-1 and were within the WHO permissible limits. High molecular weight PAHs were dominant (71.54%) relative to low molecular weight PAHs (28.46%). The risk assessment results revealed that 100% ILCRtotal values recorded for heavy metals were higher than the recommended limit. While 37.5% of ILCRtotal values recorded for PAHs were higher than the recommended values, implying that residents are exposed to health risks from both metals and PAHs. KEY WORDS: Asphalt plant, Heavy metals, Polycyclic aromatic hydrocarbons,Water, Risk assessment Bull. Chem. Soc. Ethiop. 2023, 37(6), 1337-1349. DOI: https://dx.doi.org/10.4314/bcse.v37i6.4

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尼日利亚中北部一家沥青厂附近地下水样品中重金属和多环芳烃的风险评估

摘要本研究对尼日利亚中北部一家沥青厂附近9个复合样品中重金属和多环芳烃(PAHs)的浓度和风险进行了评价。水样中重金属采用王水湿消解法提取，原子吸收光谱法定量。对多环芳烃，采用液液萃取法提取，气相色谱-质谱法定量。采用危害指数(HI)和终生癌症风险增量(ILCR)对所有研究样本进行风险评估。结果显示，水中镉和铬的浓度均高于世界卫生组织规定的允许值，而铅未检出。14种多环芳烃的总浓度在6.47 ~ 390 mg L-1之间，均在WHO允许范围内。相对于低分子量PAHs(28.46%)，高分子量PAHs占主导地位(71.54%)。风险评估结果显示，重金属记录的100% ILCRtotal值高于建议限值。而记录的多环芳烃ilcr总量中有37.5%高于建议值，这意味着居民暴露于金属和多环芳烃的健康风险中。关键词:沥青厂;重金属;多环芳烃;公牛。化学。Soc。中国生物医学工程学报，2017,37(6)，1337-1349。DOI: https://dx.doi.org/10.4314/bcse.v37i6.4

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.