Environmental Impact of Pollutants on Water Quality of Keenjhar Lake, Thatta

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Environmental Impact of Pollutants on Water Quality of Keenjhar Lake, Thatta

Desalination and Water Treatment 173 (2020) 166–176 www.deswater.com January doi: 10.5004/dwt.2020.24813 Environmental impact of pollutants on water quality of Keenjhar Lake, Thatta Mushtaq Ahmed Nizamania, Muzafar Ali Nizamanib, Qadeer Khan Panhwarb,*, Tahira Sarwar Khokharc aFaculty of Agriculture Engineering, Sindh Agriculture University Tando Jam, Sindh, Pakistan, email: [email protected] bDr. M.A. Kazi Institute of Chemistry, University of Sindh, Jamshoro, Pakistan, email: [email protected] (Q.K. Panhwar), [email protected] (M. Ali Nizamani) cNational Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan, email: [email protected] Received 4 February 2019; Accepted 23 August 2019 abstract Keenjhar Lake is the main source of drinking water for the metropolitan city of Karachi. The release of untreated wastewater from Kotri industrial area and other sources have made the lake water polluted. This study was subjected to determine the impact of such pollutant sources on the water quality of Keenjhar Lake. The study involves analysis of water quality parameters of Keenjhar Lake and its feeding source (KB Feeder). The sampling sites were selected based on the sources of contamination. The water samples are tested for physical, chemical and micro biological parameters. The result of water analysis indicates the contamination level of lake is quite alarming for the sites of Kotri effluent and WAPDA colony where total dissolved solids, chlorides and other ionic metals were quite higher in concentration than other sites. These sites are also contaminated with fluo- ride and arsenic which are carcinogenic elements. The study reveals that the contamination level of feeding source is causing a big non-reversible damage to the lake if continued to be uncontrolled. This contamination is mainly due to the release of toxic metals and ions in the KB feeder caused by human carelessness. Keywords: Water quality; Lake water; Toxic metals; Health * Corresponding author. 1944-3994/1944-3986 © 2020 Desalination Publications. All rights reserved..

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