Performance of Fe‐loaded chitosan carbonized rice husk beads (Fe‐CCRB) for continuous adsorption of metal ions from industrial effluents

Abstract

The present investigation elucidates the removal of heavy metal ions using Fe‐loaded chitosan carbonized rice husk beads—Fe‐CCRB from synthetic and industrial effluent in a fixed bed column. The surface properties of Fe‐CCRB were characterized by Brauner Emmet and Teller (BET) analyzer, Scanning Electron Microscopy (SEM), Energy Dispersive X‐ray Analysis (EDAX) and Fourier transform infrared spectroscopy (FTIR). The effects of process parameters such as flow rate, bed height and initial Cr (VI) concentration were studied to determine the break through time. The experimental data fitted well with Thomas model and Yoon Nelson model. The break through curve of Adam Bohart model fitted with initial part of the breakthrough curve of experimental data. The BDST model described the adsorption capacity of the bed per unit bed volume N0 increased with increase in Ct/C0. Regeneration studies were attempted to check the stability and activity of the adsorbent. The Fe‐CCRB adsorbent was used to treat the effluents and it was found to be more efficient in adsorption of anionic pollutant Cr (VI) ions when compared to cationic pollutant Ni (II) and Zn (II) with the maximum percentage removal of Cr(VI), Ni(II), and Zn(II) was 82.4, 63.1, and 77.2%, respectively. © 2013 American Institute of Chemical Engineers Environ Prog, 33: 1125–1138, 2014

Equilibrium and kinetics studies of hexavalent chromium biosorption on a novel green macroalgae Enteromorpha sp.

“…41 filter paper. The concentration of unadsorbed Cr(VI) ions in the reaction medium was determined spectrophotometrically at 540 nm using a double beam UV-visible spectrophotometer (2201, Systronics) after complexation with 1,5-diphenylcarbazide in an acidic medium [25]. The biosorption capacity q e (mg g -1 ) was calculated using the below equation.…”

Fixed bed column adsorption of Cr(VI) from aqueous solution using nanosorbents derived from magnetite impregnated Phaseolus vulgaris husk

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