Chitosan/chitin-carbonaceous material composites for the adsorption of water pollutants

The first review article published in 2020 by the Reaction Engineering & Adsorption (READ) Research Group lead by Prof. Dr. Bassim H. Hameed titled ‘Review on recent progress in chitosan/chitin-carbonaceous material composites for the adsorption of water pollutants’ is published in Carbohydrate Polymers Journal (Q1, Impact Factor: 7.182) published by Elsevier. The first and second co-authors of the article were Prof. Dr. Muthanna J. Ahmed from University of Baghdad, Iraq and Dr. Esam Hummadi from University of Diyala, Iraq, respectively. Prof. Bassim stated that "the article outline consists of six major sections, 1. Introduction 2. Chitosan and chitin 3. Chitosan/chitin-carbonaceous materials composite 4. Adsorption application of chitosan/chitin-based composites 5. Regeneration and reusability of adsorbents 6. Conclusions and future perspectives" The published review article provides a systematic review on the preparation of chitosan/chitin-carbonaceous material composites. Commonly used carbonaceous materials such as activated carbon, biochar, carbon nanotubes, graphene oxide and graphene to prepare composites are discussed. The application of chitosan/chitin-carbonaceous material composites for the adsorption of various water pollutants, and the regeneration and reusability of adsorbents are also included. Finally, the challenges and future prospects for the adsorbents applied for the adsorption of water pollutants are summarized. Prof. Bassim added that "hopefully this review will be beneficial to the research community in the field of Environmental Science and Engineering." The publication of this article was funded by the Qatar National Library and published under a Creative Commons license. Reference: M. J. Ahmed, B. H. Hameed, E. H. Hummadi, Review on recent progress in chitosan/chitin-carbonaceous material composites for the adsorption of water pollutants, Carbohydrate Polymers, 2471 (2020) 116690 https://doi.org/10.1016/j.carbpol.2020.116690

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Spent bleaching sorbent and chitosan: mesoporous biohybrid adsorbent for effective removal of dyes from contaminated water

Bleaching of olive oil using a suitable clay (37.45% SiO2 and 8.01% Al2O3) sorbent is a part of refining process to remove contaminants that adversely impact its appearance. With an annual global production of olive oil of more than 3.60 million tons, a huge amount of spent bleaching sorbent (SBS), contains approximately 26.99% retained oil, is generated per year in olive oil refineries and if not utilized, will be disposed into the surrounding environment. In a research conducted by Prof. Bassim H. Hameed and his team Dr. Fatma Marrakchi from Jiangsu University, China and Dr. Esam Hummadi from University of Diyala, Iraq, the generated SBS is utilized to treat water contaminated textile dyes. Together with SBS, chitosan (CS), a deacetylated derivative of chitin, can be obtained by deacetylation of chitin (CT) is used for this purpose.  CT is the structural material of crustaceans, insects, and fungi. CS, a biopolymer containing hydroxyl (–OH) and amino (−NH2) functional groups, can be easily obtained from seafood waste. The research team composite both materials (SBS and CS) to produce an effective mesoporous biohybrid adsorbent for effective methylene blue and acid blue 29 (AB29) dyes.  Prof. Bassim stated that "the purpose of the conducted research is two-fold, first, to utilize the industrial by-product SBS and seafood waste to produce an effective mesoporous biohybrid adsorbent. Second, to apply the produced adsorbent to remove textile dyes from an aqueous solution." He added "I believe this is an innovative and sustainable solution to one of the major environmental problems." The results of the research are published in the International Journal of Biological Macromolecules published (Q1, Impact Factor 5.162) by Elsevier. Reference: F. Marrakchi, B. H. Hameed, E. H. Hummadi, Mesoporous biohybrid epichlorohydrin crosslinked chitosan/carbon–clay adsorbent for effective cationic and anionic dyes adsorption, International Journal of Biological Macromolecules 16315 (2020) 1079-1086 https://doi.org/10.1016/j.ijbiomac.2020.07.032

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