A novel adsorbent for enhanced absorption of chromium(iii).

Sumathi V

Electrical

School of Electrical Engineering

Chennai Campus

Kanagaraj J

Panda R.C

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

RSC Advances

Herein, the facile synthesis of sulphonic acid functioned benzimidazolium based poly(ionic liquid) (SBPIL) is reported for the first time and we investigated its efficacy towards the removal of Cr(vi).

Fulltext

Designing a sulphonic acid functionalized benzimidazolium based poly(ionic liquid) for efficient adsorption of hexavalent chromium

A pragmatic pathway to zero emission is achieved by utilizing solid and liquid wastes completely by recycling and generating value-added auxiliaries from chrome shaving waste through process-intensified unit operations. Graft copolymer was synthesized from chrome shaving waste and polyethylene glycol (PEG), which is used as an adsorbent in the fresh chrome tanning process. The copolymer was characterized via thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), Fourier transform infrared (FT-IR) spectroscopy, and particle size analyses. FT-IR results have been characterized, confirming that the presence of free functional carboxylic acid is involved in chromium adsorption. The application of 6% copolymer in chrome tanning showed 95.95% optimal adsorption of chromium in the first cycle and 98.90% optimal adsorption of chromium in the second cycle. 1H NMR investigation revealed a peak at 8.384 ppm (6% copolymer) in the experimental sample, confirming that the participation of free functional carboxylic acid groups plays a primary role in adsorbing chromium. Molecular modeling showed an increased adsorption of chromium and greater participation of ligand-copolymer with collagen, resulting in a docking energy of 3.9 kcal/mol through hydrogen bonding, establishing the spatial arrangement of the active functional groups. A mathematical model for the prediction of concentration of chromium adsorbed by the copolymer has been proposed. Scanning electron microscopy (SEM) and scanning electron microscopy coupled with energy-dispersive X-ray (SEM-EDX) studies confirmed an increase in the adsorption of Cr especially: 6.33 wt of Cr (2.03 at.) in samples containing 6% copolymer. Atomic force microscopy (AFM) studies from topography and deflection showed clear pictures of increased adsorption of chromium by the copolymer, indicated by the absence of chromium spots on the surface for the experimental samples. © 2015 American Chemical Society.

Industrial & Engineering Chemistry Research

Water-Soluble Graft Copolymer Synthesized from Collagenous Waste and Polyethylene Glycol (PEG) with Functional Carboxylic Chains: A Highly Efficient Adsorbent for Chromium(III) with Continuous Recycling and Molecular Docking Studies

Noble copolymers from xanthan gum (XG) and poly(acrylic acid) (PAA) were synthesised through surfactant mediated graft copolymerization. The copolymers were applied as a biosorbent for inorganic Hg(II) at higher concentration level (300 ppm). The copolymers were characterized using different analytical techniques which showed, the grafting principally occurred across the amorphous region of XG. Measurement of zeta potential and hydrodynamic size indicated, the copolymers were strong polyanion and possessed greater hydrodynamic size (almost in all cases) than XG, despite a strong molecular degradation that took place simultaneously during grafting. In the dispersed form, all grades of the copolymer displayed higher adsorption capability than XG, however, the grade with maximum grafting produced the highest efficiency (68.03%). Manipulation produced further improvement in efficiency to 72.17% with the same copolymer after 75 min at a pH of 5.0. The allowable biosorbent dose, however, was 1000 ppm as determined from the experimental evidences. © 2016

Carbohydrate Polymers

Surfactant mediated synthesis of poly(acrylic acid) grafted xanthan gum and its efficient role in adsorption of soluble inorganic mercury from water

International Journal of Strategic Innovative Marketing

Exploring the Effects of Annual Income, History of Area and Natural Beauty on Loyalty to a Tourist Destination: The Case of Thessaloniki, Greece

Journal of Cleaner Production

Cleaner approach in leather dyeing using graft copolymer as high performance auxiliary: related kinetics and mechanism

Chemical Engineering & Technology

Biosorption of Trivalent Chromium from Wastewater: An Approach towards Green Chemistry

New Hydrogels Based on Substituted Anhydride Modified Collagen and 2-Hydroxyethyl Methacrylate. Synthesis and Characterization

Environmental Science & Technology

Chromium(III) Complexation to Natural Organic Matter: Mechanisms and Modeling

Synthesis of a graft-copolymer adsorbent through a green route and studies on its interactions with chromium(iii) through active functional groups: kinetics and improved adsorption supported by SEM-EDX and AFM

Journal	Data powered by TypesetRSC Advances
Publisher	Data powered by TypesetRoyal Society of Chemistry (RSC)
ISSN	20462069
Open Access	No