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Synthesis of zeolitic imidazolate framework-8 modified graphene oxide composite and its application for lead removal.

BACKGROUND: The removal of lead ions (Pb2+) from industrial wastewater can be achieved using adsorption technology. Composites of zeolitic imidazolate framework-8 (ZIF-8) and graphene oxide (GO) were prepared via room temperature synthesis (RTS) using RO water as the solvent and by mixing GO with se...

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Main Authors: Ahmad, Siti Zu Nurain, Wan Salleh, Wan Norharyati, Mohd. Yusop, Mohd. Zamri, Hamdan, Rafidah, Aziz, Farhana, Awang, Nor Asikin, Ismail, Ahmad Fauzi
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Published: John Wiley and Sons Ltd. 2023
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TP Chemical technology
Online Access:http://eprints.utm.my/106346/
http://dx.doi.org/10.1002/jctb.7337
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spelling my.utm.1063462024-06-29T06:53:24Z http://eprints.utm.my/106346/ Synthesis of zeolitic imidazolate framework-8 modified graphene oxide composite and its application for lead removal. Ahmad, Siti Zu Nurain Wan Salleh, Wan Norharyati Mohd. Yusop, Mohd. Zamri Hamdan, Rafidah Aziz, Farhana Awang, Nor Asikin Ismail, Ahmad Fauzi TP Chemical technology BACKGROUND: The removal of lead ions (Pb2+) from industrial wastewater can be achieved using adsorption technology. Composites of zeolitic imidazolate framework-8 (ZIF-8) and graphene oxide (GO) were prepared via room temperature synthesis (RTS) using RO water as the solvent and by mixing GO with separated parts of ZIF-8 precursors before its combination. Three weight percentages of GO, 10wt%, 30wt% and 50wt%, were used to synthesize ZGH10, ZGH30 and ZGH50 to determine optimum preparation and application conditions. Results: ZGH30 showed the most outstanding performance as an adsorbent for Pb2+ removal from aqueous solution. As captured by field emission scanning electron microscopy image, ZGH30 showed an adequate amount of ZIF-8 grown on all surfaces of thr GO sheet, with an appropriate exposure of GO sheet layers for further Pb2+ interaction. The Pb2+ adsorption test revealed that ZGH30 obtained the optimum operating values between pH 5 and 6, using 10 mg dosage and it could remove ≤97% of 100 mg L−1 Pb2+. Additionally, ZGH30 achieved the most rapid equilibrium time within 10 min, similar to ZGH50, as compared to their individual components, ZIF-8 (240 min) and GO (300 min). The mechanism of Pb2+ adsorption fitted well with a Langmuir isotherm and pseudo-second-order kinetic model. The theoretical maximum adsorption capacities obtained through Langmuir isotherm were 200, 454.55, 476.19, 555.56 and 454.55 mg g−1, for GO, ZH, ZGH10, ZGH30 and ZGH50, respectively. Conclusions: Therefore, ZGH30 hybrid successfully unleashed its potential as the adsorbent for wastewater treatment technology with improved performance after modification. John Wiley and Sons Ltd. 2023-11 Article PeerReviewed Ahmad, Siti Zu Nurain and Wan Salleh, Wan Norharyati and Mohd. Yusop, Mohd. Zamri and Hamdan, Rafidah and Aziz, Farhana and Awang, Nor Asikin and Ismail, Ahmad Fauzi (2023) Synthesis of zeolitic imidazolate framework-8 modified graphene oxide composite and its application for lead removal. Journal of Chemical Technology and Biotechnology, 98 (11). pp. 2668-2676. ISSN 0268-2575 http://dx.doi.org/10.1002/jctb.7337 DOI: 10.1002/jctb.7337
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TP Chemical technology
spellingShingle TP Chemical technology
Ahmad, Siti Zu Nurain
Wan Salleh, Wan Norharyati
Mohd. Yusop, Mohd. Zamri
Hamdan, Rafidah
Aziz, Farhana
Awang, Nor Asikin
Ismail, Ahmad Fauzi
Synthesis of zeolitic imidazolate framework-8 modified graphene oxide composite and its application for lead removal.
description BACKGROUND: The removal of lead ions (Pb2+) from industrial wastewater can be achieved using adsorption technology. Composites of zeolitic imidazolate framework-8 (ZIF-8) and graphene oxide (GO) were prepared via room temperature synthesis (RTS) using RO water as the solvent and by mixing GO with separated parts of ZIF-8 precursors before its combination. Three weight percentages of GO, 10wt%, 30wt% and 50wt%, were used to synthesize ZGH10, ZGH30 and ZGH50 to determine optimum preparation and application conditions. Results: ZGH30 showed the most outstanding performance as an adsorbent for Pb2+ removal from aqueous solution. As captured by field emission scanning electron microscopy image, ZGH30 showed an adequate amount of ZIF-8 grown on all surfaces of thr GO sheet, with an appropriate exposure of GO sheet layers for further Pb2+ interaction. The Pb2+ adsorption test revealed that ZGH30 obtained the optimum operating values between pH 5 and 6, using 10 mg dosage and it could remove ≤97% of 100 mg L−1 Pb2+. Additionally, ZGH30 achieved the most rapid equilibrium time within 10 min, similar to ZGH50, as compared to their individual components, ZIF-8 (240 min) and GO (300 min). The mechanism of Pb2+ adsorption fitted well with a Langmuir isotherm and pseudo-second-order kinetic model. The theoretical maximum adsorption capacities obtained through Langmuir isotherm were 200, 454.55, 476.19, 555.56 and 454.55 mg g−1, for GO, ZH, ZGH10, ZGH30 and ZGH50, respectively. Conclusions: Therefore, ZGH30 hybrid successfully unleashed its potential as the adsorbent for wastewater treatment technology with improved performance after modification.
format Article
author Ahmad, Siti Zu Nurain
Wan Salleh, Wan Norharyati
Mohd. Yusop, Mohd. Zamri
Hamdan, Rafidah
Aziz, Farhana
Awang, Nor Asikin
Ismail, Ahmad Fauzi
author_facet Ahmad, Siti Zu Nurain
Wan Salleh, Wan Norharyati
Mohd. Yusop, Mohd. Zamri
Hamdan, Rafidah
Aziz, Farhana
Awang, Nor Asikin
Ismail, Ahmad Fauzi
author_sort Ahmad, Siti Zu Nurain
title Synthesis of zeolitic imidazolate framework-8 modified graphene oxide composite and its application for lead removal.
title_short Synthesis of zeolitic imidazolate framework-8 modified graphene oxide composite and its application for lead removal.
title_full Synthesis of zeolitic imidazolate framework-8 modified graphene oxide composite and its application for lead removal.
title_fullStr Synthesis of zeolitic imidazolate framework-8 modified graphene oxide composite and its application for lead removal.
title_full_unstemmed Synthesis of zeolitic imidazolate framework-8 modified graphene oxide composite and its application for lead removal.
title_sort synthesis of zeolitic imidazolate framework-8 modified graphene oxide composite and its application for lead removal.
publisher John Wiley and Sons Ltd.
publishDate 2023
url http://eprints.utm.my/106346/
http://dx.doi.org/10.1002/jctb.7337
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score 13.211869

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