Abstrakt

Adsorption of Zinc (II) from Electroplating Industrial Effluents using Coffee Bean Husk as Low �Cost Adsorbent

Dr. T Yasodha and R Sasirekha

Zinc is widely used in electroplating industries for coating the surface of wind mill components, electrical goods, household goods, hand pumps and door locks etc. The basic processing units viz., cleansing, preplating, post plating and rinsing are mainly polluting the nearby water bodies. Various technologies available for the removal of Zn(II) from aqueous solutions include ion exchange solvent extraction, solvent extraction, chemical precipitation etc., But these methods are cost intensive and are unaffordable for large scale treatment of waste water rich in Zn(II) for developing country like India. The present study is focused on identifying a low cost adsorbent for Zn (II) adsorption from electroplating industrial effluent. There are many potential alternative to existing treatment technologies. Hence present study is to envisage the effect of pH, adsorbent dose and agitation time to the extent of Zn (II) adsorption on activated coffee bean husk from zinc plating industrial effluent. Sorption data had been correlated with both Langmuir and Freundlich adsorption isotherm models