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Monitoring of metal pollution in waterways across Bangladesh and ecological and public health implications of pollution

机译：监测孟加拉国水道中的金属污染以及污染对生态和公共健康的影响

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Using innovative artificial mussels technology for the first time, this study detected eight heavy metals (Cd, Cu, Fe, Mn, Ni, Pb, U, Zn) on a regular basis in waterways across Bangladesh (Chittagong, Dhaka and Khulna). Three heavy metals, viz. Co, Cr and Hg were always below the instrumental detection levels in all the sites during the study period. Through this study, seven metal pollution "hot spots" have been identified, of which, five "hot spots" (Cu, Fe, Mn, Ni, Pb) were located in the Buriganga River, close to the capital Dhaka. Based on this study, the Buriganga River can be classified as the most polluted waterway in Bangladesh compared to waterways monitored in Khulna and Chittagong. Direct effluents discharged from tanneries, textiles are, most likely, reasons for elevated concentrations of heavy metals in the Buriganga River. In other areas (Khulna), agriculture and fish farming effluents may have caused higher Cu, U and Zn in the Bhairab and Rupsa Rivers, whereas untreated industrial discharge and ship breaking activities can be linked to elevated Cd in the coastal sites (Chittagong). Metal pollution may cause significant impacts on water quality (irrigation, drinking), aquatic biodiversity (lethal and sub-lethal effects), food contamination/food security (bioaccumulation of metals in crops and seafood), human health (diseases) and livelihoods of people associated with wetlands. (C) 2016 Elsevier Ltd. All rights reserved.
机译：这项研究首次使用创新的人工贻贝技术，在孟加拉国（吉大港，达卡和库尔纳）的水道中定期检测到八种重金属（镉，铜，铁，锰，镍，铅，铀，锌）。三种重金属，即。在研究期间，所有地点的Co，Cr和Hg始终低于仪器检测水平。通过这项研究，已经确定了七个金属污染“热点”，其中五个“热点”（铜，铁，锰，镍，铅）位于首都达卡附近的武里甘加河。根据这项研究，与在库尔纳和吉大港监测的水道相比，武里甘加河可被列为孟加拉国污染最严重的水道。制革厂，纺织品直接排放的废水很可能是布里甘加河中重金属浓度升高的原因。在其他地区（库尔纳），农业和鱼类养殖废水可能导致了Bhairab河和Rupsa河中的铜，铀和锌较高，而未经处理的工业排放和拆船活动可能与沿海地区的镉含量升高有关（吉大港）。金属污染可能对水质（灌溉，饮水），水生生物多样性（致命和次致命影响），食品污染/粮食安全（作物和海鲜中金属的生物积累），人类健康（疾病）和人们的生计造成重大影响与湿地有关。 （C）2016 Elsevier Ltd.保留所有权利。

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