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Enhancing adsorption performance of alkali activated kaolinite in the removal of antibiotic rifampicin from aqueous solution

In this study, raw kaolin clay was activated with a strong base solution in order to improve its surface characteristics and adsorption performance. The alkali activation evidently caused etching process and ion exchanges of both Al3+ and Si4+ with Na+ on the silica and gibbsite basal surfaces, enha...

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Main Authors: Majid, A.F.A., Dewi, R., Shahri, N.N.M., Shahrin, E.W.E.S., Kusrini, E., Shamsuddin, N., Lim, J.-W., Thongratkaew, S., Faungnawakij, K., Usman, A.
Format: Article
Published: Elsevier B.V. 2023
Online Access:http://scholars.utp.edu.my/id/eprint/37292/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85168546025&doi=10.1016%2fj.colsurfa.2023.132209&partnerID=40&md5=0cf822e0b64f90670f1afc1b3b35bee0
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spelling oai:scholars.utp.edu.my:372922023-10-04T08:37:13Z http://scholars.utp.edu.my/id/eprint/37292/ Enhancing adsorption performance of alkali activated kaolinite in the removal of antibiotic rifampicin from aqueous solution Majid, A.F.A. Dewi, R. Shahri, N.N.M. Shahrin, E.W.E.S. Kusrini, E. Shamsuddin, N. Lim, J.-W. Thongratkaew, S. Faungnawakij, K. Usman, A. In this study, raw kaolin clay was activated with a strong base solution in order to improve its surface characteristics and adsorption performance. The alkali activation evidently caused etching process and ion exchanges of both Al3+ and Si4+ with Na+ on the silica and gibbsite basal surfaces, enhancing the surface area of the kaolinite particles. Adsorption of rifampicin (RIF) on the raw and alkali-activated kaolin was well described by the Langmuir isotherm and the pseudo-second-order kinetics models. The maximum adsorption capacity of RIF on the alkali-activated kaolin was 8.295 mg g�1, enhanced compared with the raw kaolin (5.931 mg g�1). The adsorption was due to weak electrostatic and hydrogen bonding interactions between RIF and the kaolinite surfaces. Adsorption mechanism, kinetics, rate limiting-step, and thermodynamics were described in detail by fitting mathematical functions of the established semiempirical models to the experimental data. The recyclability of the kaolin-based adsorbents was demonstrated by their effective regeneration. Overall, the alkali activation improves the adsorption performance of kaolin to be practically applicable as environmentally friendly and sustainable absorbents for the removal of RIF and probably other pharmaceutical compounds from hospital wastewater. © 2023 Elsevier B.V. Elsevier B.V. 2023 Article NonPeerReviewed Majid, A.F.A. and Dewi, R. and Shahri, N.N.M. and Shahrin, E.W.E.S. and Kusrini, E. and Shamsuddin, N. and Lim, J.-W. and Thongratkaew, S. and Faungnawakij, K. and Usman, A. (2023) Enhancing adsorption performance of alkali activated kaolinite in the removal of antibiotic rifampicin from aqueous solution. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 676. ISSN 09277757 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85168546025&doi=10.1016%2fj.colsurfa.2023.132209&partnerID=40&md5=0cf822e0b64f90670f1afc1b3b35bee0 10.1016/j.colsurfa.2023.132209 10.1016/j.colsurfa.2023.132209 10.1016/j.colsurfa.2023.132209
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
description In this study, raw kaolin clay was activated with a strong base solution in order to improve its surface characteristics and adsorption performance. The alkali activation evidently caused etching process and ion exchanges of both Al3+ and Si4+ with Na+ on the silica and gibbsite basal surfaces, enhancing the surface area of the kaolinite particles. Adsorption of rifampicin (RIF) on the raw and alkali-activated kaolin was well described by the Langmuir isotherm and the pseudo-second-order kinetics models. The maximum adsorption capacity of RIF on the alkali-activated kaolin was 8.295 mg g�1, enhanced compared with the raw kaolin (5.931 mg g�1). The adsorption was due to weak electrostatic and hydrogen bonding interactions between RIF and the kaolinite surfaces. Adsorption mechanism, kinetics, rate limiting-step, and thermodynamics were described in detail by fitting mathematical functions of the established semiempirical models to the experimental data. The recyclability of the kaolin-based adsorbents was demonstrated by their effective regeneration. Overall, the alkali activation improves the adsorption performance of kaolin to be practically applicable as environmentally friendly and sustainable absorbents for the removal of RIF and probably other pharmaceutical compounds from hospital wastewater. © 2023 Elsevier B.V.
format Article
author Majid, A.F.A.
Dewi, R.
Shahri, N.N.M.
Shahrin, E.W.E.S.
Kusrini, E.
Shamsuddin, N.
Lim, J.-W.
Thongratkaew, S.
Faungnawakij, K.
Usman, A.
spellingShingle Majid, A.F.A.
Dewi, R.
Shahri, N.N.M.
Shahrin, E.W.E.S.
Kusrini, E.
Shamsuddin, N.
Lim, J.-W.
Thongratkaew, S.
Faungnawakij, K.
Usman, A.
Enhancing adsorption performance of alkali activated kaolinite in the removal of antibiotic rifampicin from aqueous solution
author_facet Majid, A.F.A.
Dewi, R.
Shahri, N.N.M.
Shahrin, E.W.E.S.
Kusrini, E.
Shamsuddin, N.
Lim, J.-W.
Thongratkaew, S.
Faungnawakij, K.
Usman, A.
author_sort Majid, A.F.A.
title Enhancing adsorption performance of alkali activated kaolinite in the removal of antibiotic rifampicin from aqueous solution
title_short Enhancing adsorption performance of alkali activated kaolinite in the removal of antibiotic rifampicin from aqueous solution
title_full Enhancing adsorption performance of alkali activated kaolinite in the removal of antibiotic rifampicin from aqueous solution
title_fullStr Enhancing adsorption performance of alkali activated kaolinite in the removal of antibiotic rifampicin from aqueous solution
title_full_unstemmed Enhancing adsorption performance of alkali activated kaolinite in the removal of antibiotic rifampicin from aqueous solution
title_sort enhancing adsorption performance of alkali activated kaolinite in the removal of antibiotic rifampicin from aqueous solution
publisher Elsevier B.V.
publishDate 2023
url http://scholars.utp.edu.my/id/eprint/37292/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85168546025&doi=10.1016%2fj.colsurfa.2023.132209&partnerID=40&md5=0cf822e0b64f90670f1afc1b3b35bee0
_version_ 1779441360958390272
score 13.211869

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