relation: https://khub.utp.edu.my/scholars/9876/
title: A review on geopolymers as emerging materials for the adsorption of heavy metals and dyes
creator: Siyal, A.A.
creator: Shamsuddin, M.R.
creator: Khan, M.I.
creator: Rabat, N.E.
creator: Zulfiqar, M.
creator: Man, Z.
creator: Siame, J.
creator: Azizli, K.A.
description: The world water resources are contaminated due to discharge of a large number of pollutants from industrial and domestic sources. A variety of a single and multiple units of physical, chemical, and biological processes are employed for pollutants removal from wastewater. Adsorption is the most widely utilized process due to high efficiency, simple procedure and cost effectiveness. This paper reviews the research work carried out on the use of geopolymer materials for the adsorption of heavy metals and dyes. Geopolymers possess good surface properties, heterogeneous microstructure and amorphous structure. The performance of geopolymers in the removal of heavy metals and dyes is reported comparable to other materials. The pseudo-second order kinetics and Langmuir isotherm models mostly fit to the adsorption data suggesting homogeneous distribution of adsorption sites with the formation of monolayer adsorbate on the surface of geopolymers. Adsorption of heavy metals and dyes onto geopolymers is spontaneous, endothermic and entropy driven process. Future research should focus on the enhancement of geopolymer performance, testing on pollutants other than heavy metals and dyes, and verification on real wastewater in continuous operation. © 2018 Elsevier Ltd
publisher: Academic Press
date: 2018
type: Article
type: PeerReviewed
identifier:   Siyal, A.A. and Shamsuddin, M.R. and Khan, M.I. and Rabat, N.E. and Zulfiqar, M. and Man, Z. and Siame, J. and Azizli, K.A.  (2018) A review on geopolymers as emerging materials for the adsorption of heavy metals and dyes.  Journal of Environmental Management, 224.  pp. 327-339.  ISSN 03014797     
relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85052861279&doi=10.1016%2fj.jenvman.2018.07.046&partnerID=40&md5=244d933ae31e72cded35eccb6ffe30e5
relation: 10.1016/j.jenvman.2018.07.046
identifier: 10.1016/j.jenvman.2018.07.046