Process enhancing strategies for the reduction of Cr(VI) to Cr(III) via photocatalytic pathway

This discourse aimed at providing insight into the strategies that can be adopted to boost the process of photoreduction of Cr(VI) to Cr(III). Cr(VI) is amongst the highly detestable pollutants; thus, its removal or reduction to an innocuous and more tolerable Cr(III) has been the focus. The high pr...

Full description

Saved in:
Bibliographic Details
Published in:Environmental science and pollution research international 2022-02, Vol.29 (6), p.8026-8053
Main Authors: Anthony, Eric Tobechukwu, Oladoja, Nurudeen Abiola
Format: Article
Language:English
Subjects:
Ambience
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Catalysis
Chromium
Earth and Environmental Science
Ecotoxicology
Electrons
Environment
Environmental Chemistry
Environmental Health
Environmental Pollutants
Environmental science
Ionization
Optimization
Organic loading
Oxidation
Photocatalysis
Photocatalysts
Photoreduction
Pollutants
Process variables
Quantum efficiency
Review Article
Semiconductors
Sludge
Trivalent chromium
Variables
Waste Water Technology
Water Management
Water Pollution Control
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This discourse aimed at providing insight into the strategies that can be adopted to boost the process of photoreduction of Cr(VI) to Cr(III). Cr(VI) is amongst the highly detestable pollutants; thus, its removal or reduction to an innocuous and more tolerable Cr(III) has been the focus. The high promise of photocatalysis hinged on the sustainability, low cost, simplicity, and zero sludge generation. Consequently, the present dissertation provided a comprehensive review of the process enhancement procedures that have been reported for the photoreduction of Cr(VI) to Cr(III). Premised on the findings from experimental studies on Cr(VI) reductions, the factors that enhanced the process were identified, dilated, and interrogated. While the salient reaction conditions for the process optimization include the degree of ionization of reacting medium, available photogenerated electrons, reactor ambience, type of semiconductors, surface area of semiconductor, hole scavengers, quantum efficiency, and competing reactions, the relevant process variables are photocatalyst dosage, initial Cr(VI) concentration, interfering ion, and organic load. In addition, the practicability of photoreduction of Cr(VI) to Cr(III) was explored according to the potential for photocatalyst recovery, reactivation, and reuse reaction conditions and the process variables.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-021-17614-z