尼日利亚南部Abraka轴Ethiope河沉积物、水和鱼类样品中有机氯农药的初步研究

O. Edjere, J. Ukpebor, Samuel Emebu, F. Okieimen
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引用次数: 1

摘要

在尼日利亚南部埃塞俄比亚河的水、沉积物和鱼类样本中测定了选定的持久性有机氯污染物,包括滴滴涕及其代谢物、六氯苯、狄氏剂、艾氏剂、七氯、六氯环己烷及其一些异构体。2012年10月至2013年9月,两个季节都检测到20种有机氯农药。结果表明,雨季∑六氯环己烷的浓度分别为0.620µg/L(水)、33纳克/克(沉积物)和29.00纳克/克,旱季∑六氯环己烷浓度分别为0.170µg/L、14纳克/克和28.000纳克/克。艾氏剂0.05–0.15纳克/克,狄氏剂0.12–5.8纳克/克、异狄氏剂0.22–0.64纳克/克和硫丹0.24–6.37纳克/克以及∑DDT 0.21–8.81纳克/克(p,p`-DDD,p,p`-DDE,p,p `-DDT)。在OCPs中,∑六氯环己烷、硫丹和PDDT是河流沉积物中最主要的化合物。γ-六氯环己烷是该河流所有样本中检测到的最常见的化合物。在环二烯化合物中,艾氏剂在大多数沉积物、水和鱼类样品中含量丰富。在雨季,γ-六氯环己烷、γ-六氯环乙烷和六氯环己烷分别对水、沉积物和鱼类样本的贡献最高,而艾氏剂、异狄氏剂和六氯环己烷则分别是对水、沉淀物和鱼类平均值∑OCP的贡献最高。对鱼类样本进行的危险系数和生物累积分析表明,鱼类受到严重污染,两个季节的数值都>1,这可能引起生态问题。
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Preliminary Studies of Organochlorine Pesticides (OCPs) in Sediment, Water and Fish Samples from Ethiope River, Abraka Axis, Southern Nigeria
Selected persistent organochlorine pollutants, including DDT and its metabolites, hexachlorobenzene, dieldrin, Aldrin, heptachlor, HCH as well as some of their isomers were determined in water, sediment and fish samples from the Ethiope River in Southern Nigeria. Twenty organochlorine pesticides were detected in both seasons from October 2012 – September 2013. Results revealed ∑HCH to be 0.620µg/L (water), 33 ng/g (sediment) and 29.00 ng/g (fish) for the rainy season while concentrations of 0.170 µg/L (water), 14 ng/g (sediment) and 28.00 ng/g (fish) were obtained for the dry season. 0.05–0.15 ng/g for aldrin, 0.12–5.8 ng/g for dieldrin, 0.22–0.64 ng/g for endrin, 0.24–6.37 ng/g for endosulfan and 0.21–8.81 ng/g for ΣDDT (p, p` -DDD, p, p` -DDE, p, p` -DDT). Among the OCPs, ∑HCH, endosulfan and PDDT were the most dominant compounds in the river sediments. γ- HCH was the most frequent detected compound in all the samples from this river. Among the cyclodiene compounds, aldrin was in abundance in most of the sediments, water and fish samples. γ-HCH, γ-HCH and HCB contributed this highest value for the water, sediment and fish sample respectively in the rainy season while aldrin, endrin and HCB were the highest contributors to the ΣOCPs to the mean of water, sediment and fish respectively. Hazard quotient and bioaccumulation analysis carried out on the fish sample revealed that the fishes were heavily contaminated with values >1 for both seasons which possess a possibility for ecological concern.
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International Letters of Natural Sciences
International Letters of Natural Sciences MULTIDISCIPLINARY SCIENCES-
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