Cr(VI) and Cr(III) removal from aqueous solution by raw and modified lignocellulosic materials: a review.
By P. Miretzky, A. Cirelli. Journal of Hazardous Materials, 2010
905 citations recorded by the source corpus.
In aqueous systems, chromium usually exists in both trivalent and hexavalent oxidation states, being Cr(VI) of particular importance and concern due to its great toxicity. Industrial sources of Cr(VI) are leather tanning, mining of chrome ore, production of steel and alloys, etc. The most common conventional method for Cr(VI) removal is reduction to Cr(III) at pH 2.0 and precipitation of Cr (OH)(3) with lime at pH 9-10. The disadvantage of precipitation is the disposal of the solid waste. Adsorption of Cr by different low cost materials seems to be a suitable choice for wastewater treatment. Many by-products of agriculture have proved to be suitable low cost adsorbents for Cr(VI) and Cr(III) removal from water. Lignocellulosic residues, which include both wood residues and agricultural residues, have adsorption capacity comparable to other natural sorbents, but they have the advantage of very low or no cost, great availability and simple operational process. This study is a review of the recent literature on the use of natural and modified lignocellulosic residues for Cr adsorption. The Cr maximum adsorption capacity and the adsorption mechanism under different experimental conditions are reported when possibly.
Subfields: Health, Toxicology and Mutagenesis, Pollution, Water Science and Technology
View Paper: https://www.semanticscholar.org/paper/fc87d9319f70b21cce6b4a78d102a49eb3c7ed65
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In Health, Toxicology and Mutagenesis
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Citations in the corpus
- Chromium Stress in Plants: Toxicity, Tolerance and Phytoremediation (2021, background): “Additionally, binding of Cr ions to the secondary cell wall occurs due to the presence of lignin [91].”
- A Critical Review of the Physicochemical Properties of Lignosulfonates: Chemical Structure and Behavior in Aqueous Solution, at Surfaces and Interfaces (2020, background): “Other application areas include chelating and complexation agents, soil conditioning agents, flotation agents, dust binders, and emulsion stabilizers [4,5,7,8].”