Rapid removal of arsenic from water using metal oxide doped recyclable cross-linked chitosan cryogel

Abstract

Arsenic (As) contamination in drinking water is a global concern. Development of facile and low cost As remediation system is of significant social and economic interest. Here, we report a cost-effective and water-stable transition metal oxide doped cross-linked chitosan cryogel for highly sensitive removal of As ion from potable water. Sample aliquots were tested for total arsenic by inductively coupled plasma mass spectroscopy. It was found that the sorption kinetics follows Freundlich isotherm model. We observe remarkably high arsenic removal efficiency (76%) with only 2 h of contact time with cryogel. The scaffold materials can be easily regenerated with acetone. The high removal efficiency of As metal and recyclability of this novel synthesized metal oxide doped cross linked chitosan cryogel render them a potential candidate for low cost arsenic removal based filter development.

High-Performance Integrated rGO-[Polymeric Ionic Liquid] [Heteropolyanions] for Catalytic Degradation of Azo Dyes

“…When the molar concentration was small such that C A < 10 –3 M, kKC A ≪ 1. The above eq can be further simplified to a pseudo-first-order equation r normalA = prefix‐ normald C normalA normald t = italickK C normalA …”

Bandgap Engineering in a Staggered-Type Oxide Perovskite Heterojunction for Efficient Visible Light-Driven Photocatalytic Dye Degradation

“…Photocatalysis has recently emerged as an efficient technique for direct solar-to-chemical energy conversion and therefore plays a vital role both in energy and environmental sectors. From the production of valuable chemical fuels to the degradation of harmful pollutants, semiconductor-based photocatalysis has great potential among various proposed , technologies. However, practical photocatalytic applications of the investigated semiconductor materials are constrained due to the rapid recombination of photogenerated charge carriers and reduced photoreduction potential.…”

Iron oxide coated hollow poly(methylmethacrylate) as an efficient adsorption media for removal of arsenic from water

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