Effects of Solid Waste and Industrial Effluents on Water Quality of Turag River at Konabari Industrial Area, Gazipur, Bangladesh

Abstract

The study was conducted to investigate the effects of solid waste and industrial effluents on the water quality of Turag River. Both the upstream and downstream sampled water from the selected points were analyzed for color, odor, pH, electrical conductivity (EC), total dissolved solids (TDS), dissolved oxygen (DO), biological oxygen demand (BOD), copper (Cu), cadmium (Cd), iron (Fe), lead (Pb) and zinc (Zn) concentrations. Results of the study showed that the color of water was light to dark black and emitted noxious smell due to the industrial effluents. The upstream water was slightly alkaline with comparatively high DO content while low concentration of other parameters. The water after the solid waste and effluents received points as well as middle and downstream points was slightly alkaline with higher levels of other parameters when compared with upstream point. The minimum and maximum values of pH, EC, TDS, DO and BOD were 7.24-7.61, 425-2277 µS/cm, 239-1349 ppm, 1.22-3.66 ppm and -2.44-0.86 ppm, respectively. The continuous dumping of waste materials resulted in a marked increase in the concentration of metals in the river water varied in the order of Fe > Zn > Pb > Cu > Cd. The study concluded that the downstream water in the river was almost polluted and unsuitable for human consumption and aquaculture purposes.

Investigation of Water Quality Parameters Discharged from Textile Dyeing Industries

“…The textile dyeing industries of Gazipur generate large amount of waste water on a regular basis which are being directly discharged into the surrounding channel, agricultural fields, irrigation channels, surface water; and these finally enter into Turag river (Islam et al, 2012a). Thus, a lower amount of DO was observed in most of the downstream parts of Turag River (Islam et al, 2012b). The most important measure of water quality is the DO content .The low level of DO recorded could result in the non maintenance of conditions favorable to the aerobic organisms.…”

Heavy Metal Contamination in Water and Sediments of Passur River near the Sundarbans Mangrove of Bangladesh

“…It is clear from the overall analysis that Passur and Karnafuli rivers are in better state with lower level of heavy metal concentration than the other rivers, while Turag and Balu is suffering from heavy Fe and Cr load, respectively (Table 1). (Mamun et al, 2013) Buriganga river (Azim et al, 2009) Shitalakhya river (Islam et al, 2008) Balu river (Islam et al, 2012a) Turag river (Islam et al, 2012b) Passur river (Present study) …”

Heavy metal accumulation in leafy vegetables grown in industrial areas under varying levels of pollution

“…Area 1-high-level of pollution: Pollution by HEAVY METAL ACCUMULATION IN LEAFY VEGETABLES 41 irrigation water (Kalakoir, Konabari, Gazipur-23°59΄32.65˝N, 90°19΄43.43˝E), the vegetable samples in this area were taken from the site irrigated with the Turag river water. The river Turag is highly polluted by industrial effluents, sewage sludge, municipal waste water and urban pollution (Islam et al, 2012b). Area 2-medium-level of pollution: Pollution by pond and kennel's water (Zorun, Konabari, Gazipur-23°59΄53.38˝N, 90°19΄21.77˝E), which is polluted by industrial effluents, sewage sludge, municipal waste water and urban pollution.…”