ENVIRONMENTAL FRIENDLY TECHNOLOGY FOR REMOVAL OF LEAD FROM BATTERY WASTEWATER USING MODIFICATION OF CUTTLEBONE AS BIOSORBENT

Abstract

The present study, the innovative biosorbent for treating acid battery manufacturing wastewater containing Pb (II) was studied in order to meet eco-friendly technology. Therefore, the Pb(II) adsorption behavior of cuttlebone was analyzed its applicability in treating acid battery manufacturing wastewater. This study showed that, the modification of cuttlebone can be applied to effective biosorbent for heavy metals removal from wastewater. Ability of cuttlebone powder (CB-P) and cuttlebone modified by carbonization at 400 °C (CB-M400) for removal of Pb (II) from Pb (II) synthetic and battery wastewater are carried out using a batch adsorption system. The results showed that mainly consisted CaCO3 in CB-P and CB-M400 was affected to Pb (II) removal by CO32- complexation on adsorbent surface. The Pb (II) removal of both adsorbents was recorded optimum performance in solution pH 4.0 with adsorbent dose of 0.2 g/L. According to the adsorption equilibrium study, the very high correlation coefficients (R2>0.9329) of Langmiur isotherm can used to explain Pb adsorption in both adsorbents. The maximum Pb adsorption capacity that calculated from isotherm was 869.57 mg/g for CB-P and 1573.56 mg/g for CB-M400. In adsorption kinetic study, biosorption rate was fast and most of the process was completed within 240 minutes, according to the pseudo-second order model. In addition, Pb adsorption was interfered by competitive adsorption of contaminated Fe (II) and Cr (III) in battery wastewater. However, combination of Ca(OH)2 pretreatment following adsorbents addition was efficiently removed lead from acid battery manufacturing wastewater.