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The Effect of Temperature and pH on theRemoval / Recovery of ZN++ from Solution by Chemical Coagulation

Authors: Tahseen Hameed Al-Taey --- Adil Al –Hemiri عادل احمد عوض
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2008 Volume: 9 Issue: 2 Pages: 51-56
Publisher: Baghdad University جامعة بغداد

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Abstract

This work was conducted to study the treatment of industrial waste water, and more particularly those in the General Company of Electrical Industries.This waste water, has zinc ion with maximum concentration in solution of 90 ppm.The reuse of such effluent can be made possible via appropriate treatments, such as chemical coagulation, Na2S is used as coagulant. The parameters that influenced the waste water treatment are: temperature, pH, dose of coagulant and settling time. It was found that the best condition for zinc removal, within the range of operation used ,were a temperature of 20Co a pH value of 13 , a coagulant dose of 15 g Na2S /400ml solution and a settling time of 7 days. Under these conditions the zinc concentration was reduced from 90mg/l to 0.003 mg/l.

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Article
Dye Removal from Wastewater Using Iron Salts

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Abstract

This investigation was carried out to study the treatment and recycling of wastewater in the cotton textile industry for an effluent containing three dyes: direct blue, sulphur black and vat yellow. The reuse of such effluent can only be made possible by appropriate treatment method such as chemical coagulation. Ferrous and ferric sulphate with and without calcium hydroxide were employed in this study as the chemical coagulants. The results showed that the percentage removal of direct blue ranged between 91.4 and 94 , for sulphur black ranged between 98.7 and 99.5 while for vat yellow it was between 97 and 99.


Article
POWER GENERATION FROM “PRO” PROCESS USING FLAT SHEET TFC–ULP KOCH MEMBRANES

Authors: Saif T. Manji --- Adel O. Sharif --- Adil Al–Hemiri عادل احمد عوض
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2010 Volume: 11 Issue: 3 Pages: 47-54
Publisher: Baghdad University جامعة بغداد

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Abstract

The production of power using the process of pressure–retarded osmosis (PRO) has been studied both experimentally and theoretically for simulated sea water vs. river water and deionized water under two cases: the first is for simulated real conditions of sea water and river water and second under low brine solution concentration to examine the full profile of the power- pressure. The influence of concentration polarization (CP) on water flux has been examined as well.

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