重金属在淡水贻贝中的生物累积及其遗传毒性效应
Bioaccumulation of Heavy Metals and their Genotoxic Effect on Freshwater Mussel.
作者信息
Khan Muhammad Iftikhar, Zahoor Muhammad, Khan Ajmal, Gulfam Naila, Khisroon Muhammad
机构信息
Department of Zoology, University of Peshawar, Peshawar, Khyber Pakhtunkhwa, Pakistan.
Department of Chemistry, University of Malakand, Chakdara, Dir Lower, 18800, KPK, Pakistan.
出版信息
Bull Environ Contam Toxicol. 2019 Jan;102(1):52-58. doi: 10.1007/s00128-018-2492-4. Epub 2018 Nov 15.
Contamination of fresh water bodies like riverine system is utmost concerned environmental issue. This study was aimed to assess the concentration of heavy metals in River Kabul and their bioaccumulation by freshwater mussel. Comet assay was used to evaluate the genotoxic effect of heavy metals on hemocytes of freshwater mussel. The concentration of heavy metals in water was in the order of Zn > Pb > Ni > Cu > Mn > Fe > Cr > Cd, in sediments were Fe > Zn > Cr > Ni > Mn > Pb > Cu > Cd and in the soft tissues of freshwater mussel were in order of Fe > Zn > Mn > Pb > Cu > Cr > Ni > Cd. The hemocytes of mussels from polluted sites showed significantly higher (p < 0.05) DNA damage as compared to reference site. The study showed that pollutants from industries, municipal, domestic and agricultural sources cause heavy metals contamination in River Kabul.
像河流系统这样的淡水水体污染是极为令人担忧的环境问题。本研究旨在评估喀布尔河中重金属的浓度及其在淡水贻贝中的生物累积情况。彗星试验用于评估重金属对淡水贻贝血细胞的遗传毒性作用。水中重金属浓度顺序为锌＞铅＞镍＞铜＞锰＞铁＞铬＞镉，沉积物中为铁＞锌＞铬＞镍＞锰＞铅＞铜＞镉，淡水贻贝软组织中为铁＞锌＞锰＞铅＞铜＞铬＞镍＞镉。与对照点相比，污染点贻贝的血细胞显示出显著更高（p＜0.05）的DNA损伤。研究表明，来自工业、市政、家庭和农业源的污染物导致了喀布尔河的重金属污染。
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