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۱Impact of Orangi Nala Industrial Effluents on Sewage Water of Lyari River, Karachi, Pakistan
اطلاعات انتشار: World Applied Sciences Journal، بيست و هشتم،شماره۴، ۲۰۱۳، سال
تعداد صفحات: ۸
Industrial and domestic activities generate more than 472 million gallons per day (MGD) wastewater in Karachi (Pakistan). Lyari River is one of the major drains of this effluent and carries pollutants to the Arabian Sea. The Orangi Nala (natural channel) which is a tributary of Lyari River also contains heavy pollution load of industrial wastewater. The present study endeavors to identify contamination problems caused by the wastewater from Orangi Nala and Lyari River in the SITE industrial estate of District West, Karachi, Pakistan. The dense unplanned industrial establishments have negatively affected the wastewater quality in the study area. Wastewater samples from seven different locations in Orangi Nala and Lyari River were collected. Analytical techniques as described under “standard methods for the examination of wastewater” were adopted for physico–chemical and metal analysis of these samples and the results were compared with the National Environmental Quality Standards (2000) of Pakistan Guidelines for wastewater suitability in relation to possible health hazards. The investigations reveal that almost the whole study area is moderate to highly contaminated due to excessive concentrations of water quality parameters such as TSS, COD, BOD, TDS, DO and SAR. From the heavy metal analysis it can be inferred that the concentrations of these metal ions are within permissible limits but on the higher side. Also, for characterization of groundwater of the research area and to evaluate its quality, three groundwater samples were collected from the tube wells located in the study area. These samples were analyzed for the determination of Physico–chemical parameters such as pH, temperature, dissolved solids, salinity and dissolved oxygen.
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