Chromium Removal from Aqueous Solution Using Natural Clinoptilolite

This work investigates the applicability of clinoptilolite, a natural zeolite, as low-cost adsorbent for removing chromium from aqueous solutions using fixed bed studies. To improve its removal performance inorganic pollutant, is pretreated with NaCl to prepare it in homoionic form Na+ before undertaking ion exchange Cr3+ solution. also evaluates if treated effluents could meet required effluent discharge standard set by legislation target pollutant. sustain cost-effectiveness wastewater treatment, spent regenerated NaOH. It was found that clinoptilolite has two-times higher Cr adsorption capacity (4.5 mg/g) than as-received (2.2 mg/g). Pretreatment enabled treat more volume (BV) (64 BV) at breakthrough point 0.5 mg/L concentration and achieve longer time (1500 min) first run, compared (32 BV; 250 min). suggests pretreatment rendered Na+. Although an initial 10 mg/L, were still unable limit less 0.05 US Environmental Protection Agency (EPA).