Comparative biosorption competencies of Ficus, Syzygium and Mangifera seeds for hexavalent chromium mitigation from polluted water

Abstract

Aim: The dumped subsurface industrial wastes containing toxic metals have contaminated water resources because of their natural process leading to severe threat to flora, fauna and ecosystem in UPSIDC, Unnao area. The waste water contaminated chromium compounds can be purified through surface assimilation. The aim of the present study was to match sorption competencies of Ficus racemosa with Syzygium cumini and Mangifera cumini seed for chromium (VI) removal from polluted water. Co Methodology: Chromium (VI) contaminated water samples were collected from UPSIDC sites, Unnao, Uttar Pradesh standardized and diluted to experimental strength. The sorption of Cr (VI) was investigated with relative competencies of biosorbents (F. racemosa, M. indica and S. cumini seeds) with retention time, sorbent dosage, temperature, chromium concentration and hydrogen ion activity. The biosorption was tested with various isopleths (Linear, Chemist and Freundlich). Results: The sorption potential of F. racemosa seeds was of 10 mgg-1 where as S. cumini and M. indica showed biosorption capacity of 13 and 21 mgg-1 Cr at neutral hydrogen ion activity scale. The surface assimilation was found highest at low pH scale range of two, rising with sorbent application quantity, temperature and decreased with higher Cr (VI) content. Interpretation: The study reveals that biosorption efficiency decreased in the following order: M. indica > S. cumini > F. racemosa seed for hexavalent chromium from waste water.