Cyanide removal from cassava wastewater onto H3PO4 activated periwinkle shell carbon

Abstract The continuous generation of waste resulting from the industrial activities humans has significantly been on rise, especially liquid wastes emanating cassava processing mills, which is a major cause for concern in developing countries. This study focused preparation H 3 PO 4 activated periwinkle carbon (APSC) and use removal cyanide wastewater. influence variables such as pH, adsorbent dosage, contact time, different concentrations was investigated batch procedures. Results studies reveal strong pH-dependent adsorption process with optimum occurring at pH 8. An equilibrium time 80 min dosage 3.0 g gave highest percentage adsorbed 83.93%. Pseudo-first-order, Pseudo-second-order, Elovich kinetic models were used analysis experimental data while using Langmuir, Freundlich, Redlich–Peterson carried out to determine best-fit isotherm model. Coefficient determination ( r 2 ), Sum square error (SSE), Chi-square $$\chi^{2}$$ ? 2 ) estimate deviations between predicted nonlinear regression that best explain process. Kinetic fitted well Pseudo-second-order model implies chemisorption dominant Langmuir describes suggesting mono-layer monolayer capacity APSC found be 2.856 mg.g ?1 .