摘要：The adsorption of hexavalent chromium, present in effluents of various industries such as electroplating,tannery, etc., on Coal Fly Ash (CFA) has been investigated in the present study. Parameters like contacttime, adsorbent dose, pH and initial chromium ion concentration were studied in kinetic batch experiments at25°C. Among all the parameters, pH of the solution was most effective for chromium removal. The adsorptionof hexavalent chromium on CFA was found to be maximum at low pH. The adsorption data fit well withLangmuir and Freundlich isotherm models. The Langmuir adsorption isotherm to the systems yieldedmaximum adsorption capacity of 19.77 mg/g at the solution pH of 2. Results showed that the pseudo secondorder kinetic model best correlate with the experimental data.
