Ali Hazrat, Khan Ezzat
Department of Chemistry, University of Malakand, Chakdara, Dir Lower, 18800, Khyber Pakhtunkhwa, Pakistan.
Environmental Chemistry, Ecotoxicology and Ecology Laboratory, Department of Zoology, University of Malakand, Chakdara, Dir Lower, Khyber Pakhtunkhwa, 18800, Pakistan.
Bull Environ Contam Toxicol. 2019 Jan;102(1):77-83. doi: 10.1007/s00128-018-2500-8. Epub 2018 Nov 19.
Contamination of freshwater ecosystems such as rivers with hazardous heavy metals is an environmental problem of public health concern. Accumulation of potentially toxic heavy metals in freshwater fish causes a potential health threat to their consumers including humans. The present research aimed to (1) investigate the accumulation of four potentially toxic heavy metals viz. Cr, Ni, Cd and Pb in muscle tissue of the commercially important freshwater fish Schizothorax plagiostomus at different sites of River Swat, River Panjkora and River Barandu in northern Pakistan (2) to compare gross metal accumulation in the fish samples by calculating metal pollution index (MPI) and (3) to assess potential risk to the health of the fish consumers. Samples were analyzed for the heavy metals by flame atomic absorption spectrophotometry (FAAS). Risk analysis showed that Ni risk was higher at River Panjkora and River Barandu, Pb risk was higher at River Swat and River Panjkora while Cd risk was quite low at all the three rivers.
河流等淡水生态系统被有害重金属污染是一个关乎公众健康的环境问题。淡水鱼体内潜在有毒重金属的积累对包括人类在内的消费者构成了潜在的健康威胁。本研究旨在：（1）调查巴基斯坦北部斯瓦特河、潘杰科拉河和巴兰杜河不同地点的重要商业淡水鱼高原裂腹鱼肌肉组织中四种潜在有毒重金属，即铬、镍、镉和铅的积累情况；（2）通过计算金属污染指数（MPI）比较鱼样本中的总金属积累量；（3）评估对鱼类消费者健康的潜在风险。采用火焰原子吸收光谱法（FAAS）对样本中的重金属进行分析。风险分析表明，潘杰科拉河和巴兰杜河的镍风险较高，斯瓦特河和潘杰科拉河的铅风险较高，而在所有三条河流中镉风险都相当低。
