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Zeolitic imidazolate framework-L incorporated graphene oxide hybrid for cadmium removal

The removal of cadmium from wastewater is crucial to avoid its harmful effects on the ecosystem. Thus, in this study, novel composites were prepared by in situ synthesis of zeolitic imidazolate framework-L (ZIF-L) incorporated with graphene oxide (GO) of different loading ratios to produce ZIF-L/GO...

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Main Authors:	Ahmad, Siti Zu Nurain, Wan Salleh, Wan Norharyati, Ismail, Nor Hafiza, Rosman, Nurafiqah, Mohd. Razali, Nur Aqilah, Hamdan, Rafidah, Ismail, Ahmad Fauzi
Format:	Conference or Workshop Item
Published:	2021
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/94290/ http://dx.doi.org/10.1016/j.matpr.2020.08.339
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spelling	my.utm.942902022-03-31T15:21:17Z http://eprints.utm.my/id/eprint/94290/ Zeolitic imidazolate framework-L incorporated graphene oxide hybrid for cadmium removal Ahmad, Siti Zu Nurain Wan Salleh, Wan Norharyati Ismail, Nor Hafiza Rosman, Nurafiqah Mohd. Razali, Nur Aqilah Hamdan, Rafidah Ismail, Ahmad Fauzi TP Chemical technology The removal of cadmium from wastewater is crucial to avoid its harmful effects on the ecosystem. Thus, in this study, novel composites were prepared by in situ synthesis of zeolitic imidazolate framework-L (ZIF-L) incorporated with graphene oxide (GO) of different loading ratios to produce ZIF-L/GO 20 and ZIF-L/GO 50. The adsorbents were characterized using X-ray Diffractometer (XRD), Fourier-transform Infrared Spectroscopy (FT-IR), and Scanning Electron Microscopy (SEM). The effects of Cd(II) adsorption with respect to the initial pH solution, adsorbent dosage, initial Cd(II) concentration, and contact time were investigated. Both ZIF-L/GO 20 and ZIF-L/GO 50 showed superior performance in removing Cd(II) as compared with ZIF-L (62.32% within 160 min), which were 64.35% and 70.41% within 60 min and 180 min, respectively. The optimum dosage obtained was 0.2 g/L for the removal of 100 mg/L Cd(II) synthetic wastewater. The protruding grains of flower-like ZIF-L/GO 20 allowed for faster adsorption time, whereas the smaller size of irregular shapes ZIF-L/GO 50 increased the surface area for higher adsorption capacity. Also, the adsorption of Cd(II) had fitted well with pseudo-second-order kinetic model and Langmuir isotherm. The Langmuir maximum adsorption capacities for ZIF-L, ZIF-L/GO 20, and ZIF-L/GO 50 were 163.93, 172.42, and 188.68 mg/g, respectively. The novel adsorbents ZIF-L/GO 20 and ZIF-L/GO 50 showed promising performance in the removal of Cd(II) ion from the aqueous solution. 2021 Conference or Workshop Item PeerReviewed Ahmad, Siti Zu Nurain and Wan Salleh, Wan Norharyati and Ismail, Nor Hafiza and Rosman, Nurafiqah and Mohd. Razali, Nur Aqilah and Hamdan, Rafidah and Ismail, Ahmad Fauzi (2021) Zeolitic imidazolate framework-L incorporated graphene oxide hybrid for cadmium removal. In: 5th International Conference of Chemical Engineering and Industrial Biotechnology, ICCEIB 2020, 9 - 11 August 2020, Kuala Lumpur, Malaysia. http://dx.doi.org/10.1016/j.matpr.2020.08.339
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 Ismail, Nor Hafiza Rosman, Nurafiqah Mohd. Razali, Nur Aqilah Hamdan, Rafidah Ismail, Ahmad Fauzi Zeolitic imidazolate framework-L incorporated graphene oxide hybrid for cadmium removal
description	The removal of cadmium from wastewater is crucial to avoid its harmful effects on the ecosystem. Thus, in this study, novel composites were prepared by in situ synthesis of zeolitic imidazolate framework-L (ZIF-L) incorporated with graphene oxide (GO) of different loading ratios to produce ZIF-L/GO 20 and ZIF-L/GO 50. The adsorbents were characterized using X-ray Diffractometer (XRD), Fourier-transform Infrared Spectroscopy (FT-IR), and Scanning Electron Microscopy (SEM). The effects of Cd(II) adsorption with respect to the initial pH solution, adsorbent dosage, initial Cd(II) concentration, and contact time were investigated. Both ZIF-L/GO 20 and ZIF-L/GO 50 showed superior performance in removing Cd(II) as compared with ZIF-L (62.32% within 160 min), which were 64.35% and 70.41% within 60 min and 180 min, respectively. The optimum dosage obtained was 0.2 g/L for the removal of 100 mg/L Cd(II) synthetic wastewater. The protruding grains of flower-like ZIF-L/GO 20 allowed for faster adsorption time, whereas the smaller size of irregular shapes ZIF-L/GO 50 increased the surface area for higher adsorption capacity. Also, the adsorption of Cd(II) had fitted well with pseudo-second-order kinetic model and Langmuir isotherm. The Langmuir maximum adsorption capacities for ZIF-L, ZIF-L/GO 20, and ZIF-L/GO 50 were 163.93, 172.42, and 188.68 mg/g, respectively. The novel adsorbents ZIF-L/GO 20 and ZIF-L/GO 50 showed promising performance in the removal of Cd(II) ion from the aqueous solution.
format	Conference or Workshop Item
author	Ahmad, Siti Zu Nurain Wan Salleh, Wan Norharyati Ismail, Nor Hafiza Rosman, Nurafiqah Mohd. Razali, Nur Aqilah Hamdan, Rafidah Ismail, Ahmad Fauzi
author_facet	Ahmad, Siti Zu Nurain Wan Salleh, Wan Norharyati Ismail, Nor Hafiza Rosman, Nurafiqah Mohd. Razali, Nur Aqilah Hamdan, Rafidah Ismail, Ahmad Fauzi
author_sort	Ahmad, Siti Zu Nurain
title	Zeolitic imidazolate framework-L incorporated graphene oxide hybrid for cadmium removal
title_short	Zeolitic imidazolate framework-L incorporated graphene oxide hybrid for cadmium removal
title_full	Zeolitic imidazolate framework-L incorporated graphene oxide hybrid for cadmium removal
title_fullStr	Zeolitic imidazolate framework-L incorporated graphene oxide hybrid for cadmium removal
title_full_unstemmed	Zeolitic imidazolate framework-L incorporated graphene oxide hybrid for cadmium removal
title_sort	zeolitic imidazolate framework-l incorporated graphene oxide hybrid for cadmium removal
publishDate	2021
url	http://eprints.utm.my/id/eprint/94290/ http://dx.doi.org/10.1016/j.matpr.2020.08.339
_version_	1729703151172321280
score	13.211869

Zeolitic imidazolate framework-L incorporated graphene oxide hybrid for cadmium removal

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