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Current Trends of Arsenic Adsorption in Continuous Mode: Literature Review and Future Perspectives

Laboratory of Separation and Reaction Engineering—Laboratory of Catalysis and Materials (LSRE-LCM), Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
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Academic Editor: Danilo Spasiano
Sustainability 2021, 13(3), 1186; https://doi.org/10.3390/su13031186
Received: 2 December 2020 / Revised: 10 January 2021 / Accepted: 20 January 2021 / Published: 23 January 2021
(This article belongs to the Special Issue Exploring Innovative Solutions for Wastewater Treatment)
Arsenic is a toxic element for humans and a major pollutant in drinking water. Natural and anthropogenic sources can release As into water bodies. The countries with the greatest arsenic contamination issues lack the affordable technology to attain the maximum permitted concentrations. Adsorption can be a highly efficient and low-cost option for advanced water treatment, and the development of new cheap adsorbents is essential to expand access to water with a safe concentration of arsenic. This paper aims to review the state of the art of arsenic adsorption from water in continuous mode and the latest progress in the regeneration and recovery of arsenic. The disposal of the exhausted bed is also discussed. Fixed-bed column tests conducted with novel adsorbents like binary metal oxides and biosorbents achieved the highest adsorption capacities of 28.95 mg/g and 74.8 mg/g, respectively. Iron-coated materials presented the best results compared to adsorbents under other treatments. High recovery rates of 99% and several cycles of bed regeneration were achieved, which can aggregate economic value for the process. Overall, further pilot-scale research is recommended to evaluate the feasibility of novel adsorbents for industrial purposes. View Full-Text
Keywords: arsenic; adsorption; fixed-bed column; regeneration; biosorbents arsenic; adsorption; fixed-bed column; regeneration; biosorbents
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MDPI and ACS Style

Carneiro, M.A.; Pintor, A.M.A.; Boaventura, R.A.R.; Botelho, C.M.S. Current Trends of Arsenic Adsorption in Continuous Mode: Literature Review and Future Perspectives. Sustainability 2021, 13, 1186. https://doi.org/10.3390/su13031186

AMA Style

Carneiro MA, Pintor AMA, Boaventura RAR, Botelho CMS. Current Trends of Arsenic Adsorption in Continuous Mode: Literature Review and Future Perspectives. Sustainability. 2021; 13(3):1186. https://doi.org/10.3390/su13031186

Chicago/Turabian Style

Carneiro, Mariko A., Ariana M.A. Pintor, Rui A.R. Boaventura, and Cidália M.S. Botelho. 2021. "Current Trends of Arsenic Adsorption in Continuous Mode: Literature Review and Future Perspectives" Sustainability 13, no. 3: 1186. https://doi.org/10.3390/su13031186

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