Volume No. 8 Issue No.: 1 Page No.: 102-108 Jul-Sept. 2013

 

A LAB-SCALE STUDY ON REDUCTION OF HEAVY METALS FROM ELECTROPLATING EFFLUENT USING CONVENTIONAL CHEMICAL PRECIPITATION

 

Santhosh P.*1 and Sridevi A.2

1. Department of Chemical Engineering, C.I.T. Sandwich Polytechnic College, Coimbatore (INDIA)
2. Department of Chemistry , C.I.T. Sandwich Polytechnic, Coimbatore (INDIA)

 

Received on : April 02, 2013

 

ABSTRACT

 

This paper deals with the various sources of heavy metals and the reduction of heavy metals from the effluent water discharged from electroplating industries. The various metals present in the waste water are found to be lead, chromium, zinc, copper, cadmium, mercury etc., The various methods that are available to remove the heavy metals are adsorption, chemical precipitation, sedimentation filtration etc. Here precipitation method experimental work has been carried out for the removal of some heavy metals from the waste water. The present study deals with the determination of physicochemical parameters of electroplating effluents collected from a local industry. Treatment of chrome plating effluent water was carried out using the Poly Aluminium Chloride (PAC) and polyelectrolyte were selected as coagulant and settling agent respectively at appropriate pH conditions. The efficiency of the performance of Poly Aluminum Chloride (PAC) and polyelectrolyte was estimated and the optimum conditions were found to be pH 9 at room temperature. The treatment efficiency of the chrome plating waste water was also carried out. The result shows the performance of Poly Aluminium Chloride (PAC) in treating chrome plating effluent water effectively. This study is intended to provide, in layman's terms, a better understanding of the precipitation and coagulation process as applied to industrial wastewater treatment.

 

Keywords : Lime, NaOH, Poly Aluminium Chloride (PAC), Polyelectrolyte, Hydroxide precipitation, Waste water

 

 

BACK