ISSN : 0970 - 020X, ONLINE ISSN : 2231-5039
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Abstract

Preliminary Study of Zinc Removal from Cyanide-free Alkaline Electroplating Effluent by Precipitation Using Oxalis Plants

Benouali D.*1, Kherici S.2, Belabbassi M.1, Belkandouci M.M.1, Bennemra A.1

DOI : http://dx.doi.org/10.13005/ojc/300215


Abstract:

The aim of this study is the reduction of Zinc from the cyanide-free alkaline zinc-platingeffluent. Various methods utilizedfor removing or recovering the heavy metals are adsorption, chemical precipitation, sedimentationfiltration, reverse osmosis etc. We are interested in using oxalisplant as a potential chelating/settling agent for the treatment of electroplatingeffluent collected from a local industrial unit.Oxalis pes-capaehas an exceptionally high content of oxalic acid which isknown as moderate and week chelating agent.Theefficiency of the performance oxalis powder (KITININ)was estimatedand the optimum dosewasdeterminedusing conductivity, volumetric, atomic absorption spectroscopy and pH measurements. The results show the performance of oxalis in treating Zn plating effluent effectively.In effect, a white crystalline precipitate of zinc oxalate is easily extracted(98,52 % elimination of Zn) and ahighsettling rateis observed.The maximum zinc uptake by Oxalis in batch systems is estimated to6,44 mg/g.

Keywords:

Oxalis; precipitation; Zinc; electroplating effluent

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