Removal of Toxic Lead Ions in Presence of Cationic Surfactants

Mona Darweesh1 and A.M. Ahmed2,*

1Faculty of Engineering, Tanta University, Tanta, Egypt

2Chemistry Department, Faculty of Science, Alexandria University, Alexandria 21544, Egypt

*Corresponding author: E-mail: abdel_m1944@yahoo.com

Abstract

The removal of toxic Pb2+ from waste water by cementation on rotating zinc cylinder takes place in absence and in presence of cationic surfactants as cetyl trimethylammonium bromide (CTAB) and cetyl pyridinium bromide (CPYB). The rate of removal of Pb2+ was studied under different conditions of rotation speed, initial Pb2+ concentration, temperature and different types of cationic surfactants. It was found that, the rate of removal of Pb2+ increases with increasing rotation speed (rpm) and temperatures. The presence of surfactants was found to decrease the rate of cementation. The decrease in the rate of cementation was ranged from 29 to 78 % depending on the type of surfactants and its concentration. Thermodynamic parameters DG*, DH* and DS* were calculated.

Keywords

Removal, Lead, Surfactant.

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