• Dilara Khanam
• M. Aminul Ahsan
• Md. Ahedul Akbor

The study was carried out in order to investigate the nature and extent of pollution in the water body of dhalai beel area located at dhamsona at savar, Dhaka due to the industrial effluents discharged from the Dhaka export processing zone (DEPZ). 20 samples in the wet season and 20 samples in the dry season were collected from the selective points of the water body. Among twenty sampling point four sampling points was the source point and consecutive sampling points have a distance of hundred meters between them. The parameters such as odor, color, temperature, PH, EC, TSS, TDS, Total alkalinity, Total hardness, DO, BOD, COD, Turbidity were measured by using different instrument. Total study area was around one and half kilometer area. From the source point to half of the area (sampling point 5 to 12) maximum physicochemical parameter concentration was higher. After this area consecutive sampling area (nearly (0.75 Km area) physicochemical parameter concentration was lower. The intensity of pollution decreased in both the season and the levels of the parameter were relatively higher in the dry season than that in the wet season. Especially sampling points 11 and 12, concentration was higher than the others, because there was a pocket area. As a whole the result of this study have showed that the surface water around DEPZ up to 0.75 km area was highly impacted due to continuous mixing of the effluents and is quite unsuitable but remaining 0.75 km area is quite suitable to serve aquatic and agricultural purpose.

Industrial Discharge, Bio-accumulation, Zero Discharge System ETP, Heavy Metal, Bangladesh

"Lateral Variation of Physicochemical Properties of Surface Water around Dhaka Export Processing Zone (DEPZ) Savar, Bangladesh", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 11, page no.681-692, November-2018, Available :http://www.jetir.org/papers/JETIR1811697.pdf

"Lateral Variation of Physicochemical Properties of Surface Water around Dhaka Export Processing Zone (DEPZ) Savar, Bangladesh", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 11, page no. pp681-692, November-2018, Available at : http://www.jetir.org/papers/JETIR1811697.pdf