Department of Zoology, Hazara University, Mansehra, Pakistan.
Department of Livestock and Fisheries, Government of Sindh, Sindh, Pakistan.
Environ Sci Pollut Res Int. 2017 Oct;24(29):23039-23056. doi: 10.1007/s11356-017-9921-5. Epub 2017 Aug 19.
The present study was conducted to evaluate the impact of marble industry effluents on the accumulation of heavy metals in selected tissues of mahaseer (Tor putitora) in Barandu River. Fish samples were collected from three selected sites (upstream (US), effluents/industrial (IS), and downstream (DS) sites) on monthly basis for 8 months. Heavy metal concentrations were determined in fish tissues using Atomic Absorption Spectrophotometer. Liver accumulated the highest level of metal concentrations while the lowest concentrations were found in muscles in T. putitora. Among metals, Fe was reported in the highest amount whereas the lowest was Cd in all the fish organs. In all the months, the metal concentrations were significantly higher (P < 0.05) at IS than the other two selected sites and also very often the metal concentrations at DS were found significantly higher (P < 0.05) compared to the US. The obtained results revealed that discharging industrial effluents caused an increased accumulation of heavy metals in fish tissues at IS compared to US and DS. Furthermore, in many cases, the concentrations at DS were also found significantly higher (P < 0.05) compared to US. It is further confirmed by skewness z-score which was found to be higher than 1.96 suggesting the hazardous effects of marble industries on the collective health of the river. It is therefore recommended that all these industries either should be moved away from the bank of River Barandu or must be bound to properly treat their effluents prior to discharge into the river in order to protect the biota of River Barandu from the pollution caused by these marble industries.
本研究旨在评估大理石工业废水对巴兰杜河（Barandu River）中所选马萨鱼（Tor putitora）组织中重金属积累的影响。每月从三个选定地点（上游（US）、废水/工业（IS）和下游（DS））采集鱼类样本 8 个月。使用原子吸收分光光度计测定鱼组织中的重金属浓度。肝脏积累的金属浓度最高，而肌肉中的金属浓度最低。在所研究的金属中，Fe 的含量最高，而 Cd 的含量最低。在所有月份，IS 点的金属浓度均明显高于其他两个选定地点（P<0.05），而且 DS 点的金属浓度也经常明显高于 US 点（P<0.05）。研究结果表明，与 US 和 DS 相比，排放工业废水导致 IS 点鱼类组织中重金属的积累增加。此外，在许多情况下，DS 点的浓度也明显高于 US 点（P<0.05）。偏度 z 得分也证实了这一点，其值高于 1.96，表明大理石工业对河流整体健康存在潜在危害。因此，建议所有这些工业要么远离巴兰杜河河岸，要么必须在将废水排放到河中之前对其进行适当处理，以保护巴兰杜河的生物多样性免受这些大理石工业造成的污染。
