Effective Application of Jatropha Curcas Husk Activated ZnCl2 for Adsorption of Methylene Blue: Isotherm, Kinetics and Development of Empirical Model

Water conservation is critical for both the natural environment and human development however, there is wastewater generation, particularly in the production of pulp, printing, leather, plastic, dye, and textile mills. Large-scale industrial wastewater purification necessitates the employment of low-cost adsorbents to lower the cost of large-scale industrial wastewater treatment procedures. In this study, the husk of Jatropha curcas (JHC) was carbonized, activated, and impregnate with ZnCl2 for use in batch tests to adsorb methylene blue (MB) from an aqueous solution. The effects of concentration, stirring speed, contact time, pH, and adsorbent dosage on adsorption isotherms and kinetics were examined. The Freundlich isotherm model accurately described the adsorption isotherm, while pseudo-second-order adequately fitted the kinetic data. The dye-loaded adsorbent could be regenerated by chemical regeneration after five desorption cycles. These findings suggested that JHC could be a good adsorbent for removing MB from wastewater and could help with industrial wastewater treatment.