Title: Biosorption of hexavalent chromium from aqueous solution by low cost adsorbents

Authors: Nitin W. Ingole; Sachin V. Dharpal

Addresses: Department of Civil Engineering, Prof Ram Meghe Institute of Technology and Research, Badnera, Amravati, Maharashtra 444701, India ' Department of Civil Engineering, Prof Ram Meghe Institute of Technology and Research, Badnera, Amravati, Maharashtra 444701, India

Abstract: The removal of heavy metal ions such as Cr (VI) from aqueous solution using the berry seeds (BS) and tamarind seeds (TS) as an adsorbent under different experimental conditions was investigated in this study. The parameters investigated were pH, contact time, adsorbent dosage, initial metal ions concentration and particle size. It was observed that the berry seeds (BS) removed removal more of Cr (VI) than tamarind seeds (TS) in the batch adsorption experiments. The optimum removal of the Cr (VI) metal ions occurred at pH2 at constant temperature of 30°C. It has been found that the results follow a Langmuir adsorption model and yielded maximum adsorption capacity of 37.03 (mg/g) for BS and 12.19 (mg/g) for TS. The effect of bed heights (10 and 20 cm), feed flow rates (2, 4 and 6 ml/min) and inlet chromium ions concentration 100 mg/l on the breakthrough curve were studied using berry seeds powder.

Keywords: berry seeds; tamarind seeds; adsorption; heavy metals; isotherms; kinetics.

DOI: 10.1504/IJEE.2016.085497

International Journal of Environmental Engineering, 2016 Vol.8 No.4, pp.245 - 266

Accepted: 27 Dec 2016
Published online: 28 Jul 2017 *

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