Cover Image

Usage of a new macro-hierarchical graphene sponge in batch adsorption and packed column configuration for efficient decontamination of cadmium in aqueous environment

Cadmium is one of the most harmful metallic elements which requires immediate measures on its sequestration from polluted aquatic environment. This research emphasised on the development of a new macro-hierarchical graphene oxide configuration as an adsorbing agent for cadmium decontamination in bat...

Full description

Saved in:
Bibliographic Details
Main Authors: Lai, Kar Chiew, Hiew, Billie Yan Zhang, Tee, Wan Ting, Thangalazhy-Gopakumar, Suchithra, Gan, Suyin, Lee, Lai Yee
Format: Article
Published: Elsevier Science Ltd 2021
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://eprints.um.edu.my/28476/
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.um.eprints.28476
record_format eprints
spelling my.um.eprints.284762022-08-11T07:06:19Z http://eprints.um.edu.my/28476/ Usage of a new macro-hierarchical graphene sponge in batch adsorption and packed column configuration for efficient decontamination of cadmium in aqueous environment Lai, Kar Chiew Hiew, Billie Yan Zhang Tee, Wan Ting Thangalazhy-Gopakumar, Suchithra Gan, Suyin Lee, Lai Yee TA Engineering (General). Civil engineering (General) Cadmium is one of the most harmful metallic elements which requires immediate measures on its sequestration from polluted aquatic environment. This research emphasised on the development of a new macro-hierarchical graphene oxide configuration as an adsorbing agent for cadmium decontamination in batch and continuous aqueous adsorption systems. The graphene composite was prepared by integrating graphene oxide, xanthan gum and titanium isopropoxide (GO/XG/TI) via a facile freeze-casting approach, using water as the pore forming agent. The batch equilibrium of the new cadmium-GO/XG/TI adsorption system was well predicted by the Freundlich isotherm while the kinetic performance followed closely the pseudo-second-order kinetic correlation. The regeneration results indicated that the adsorbent had the ability to retain 80.75% of its initial adsorption performance even after five successive cycles. A continuous GO/XG/TI aerogel column study was executed for the first time by altering the bed height, feed flowrate and influent concentration. The greatest bed capacity of 64.052 mg/g was attained at a column height of 3 cm, influent cadmium concentration of 100 mg/L and feed flowrate of 2 mL/min. The dynamic column data were correlated to the Adams-Bohart, Thomas and Yoon-Nelson models. Fourier-transform-infrared spectroscopy, point of zero charge and pH studies verified complexation and electrostatic interaction as the dominant mechanisms which anchored the cadmium ions onto the GO/XG/TI adsorbent. The findings from both batch and continuous packed-bed studies supported the use of as-fabricated GO/XG/TI as an efficient purifying agent for the remediation of cadmium in aqueous environment. Elsevier Science Ltd 2021-10 Article PeerReviewed Lai, Kar Chiew and Hiew, Billie Yan Zhang and Tee, Wan Ting and Thangalazhy-Gopakumar, Suchithra and Gan, Suyin and Lee, Lai Yee (2021) Usage of a new macro-hierarchical graphene sponge in batch adsorption and packed column configuration for efficient decontamination of cadmium in aqueous environment. Journal of Environmental Chemical Engineering, 9 (5). ISSN 2213-2929, DOI https://doi.org/10.1016/j.jece.2021.106057 <https://doi.org/10.1016/j.jece.2021.106057>. 10.1016/j.jece.2021.106057
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Lai, Kar Chiew
Hiew, Billie Yan Zhang
Tee, Wan Ting
Thangalazhy-Gopakumar, Suchithra
Gan, Suyin
Lee, Lai Yee
Usage of a new macro-hierarchical graphene sponge in batch adsorption and packed column configuration for efficient decontamination of cadmium in aqueous environment
description Cadmium is one of the most harmful metallic elements which requires immediate measures on its sequestration from polluted aquatic environment. This research emphasised on the development of a new macro-hierarchical graphene oxide configuration as an adsorbing agent for cadmium decontamination in batch and continuous aqueous adsorption systems. The graphene composite was prepared by integrating graphene oxide, xanthan gum and titanium isopropoxide (GO/XG/TI) via a facile freeze-casting approach, using water as the pore forming agent. The batch equilibrium of the new cadmium-GO/XG/TI adsorption system was well predicted by the Freundlich isotherm while the kinetic performance followed closely the pseudo-second-order kinetic correlation. The regeneration results indicated that the adsorbent had the ability to retain 80.75% of its initial adsorption performance even after five successive cycles. A continuous GO/XG/TI aerogel column study was executed for the first time by altering the bed height, feed flowrate and influent concentration. The greatest bed capacity of 64.052 mg/g was attained at a column height of 3 cm, influent cadmium concentration of 100 mg/L and feed flowrate of 2 mL/min. The dynamic column data were correlated to the Adams-Bohart, Thomas and Yoon-Nelson models. Fourier-transform-infrared spectroscopy, point of zero charge and pH studies verified complexation and electrostatic interaction as the dominant mechanisms which anchored the cadmium ions onto the GO/XG/TI adsorbent. The findings from both batch and continuous packed-bed studies supported the use of as-fabricated GO/XG/TI as an efficient purifying agent for the remediation of cadmium in aqueous environment.
format Article
author Lai, Kar Chiew
Hiew, Billie Yan Zhang
Tee, Wan Ting
Thangalazhy-Gopakumar, Suchithra
Gan, Suyin
Lee, Lai Yee
author_facet Lai, Kar Chiew
Hiew, Billie Yan Zhang
Tee, Wan Ting
Thangalazhy-Gopakumar, Suchithra
Gan, Suyin
Lee, Lai Yee
author_sort Lai, Kar Chiew
title Usage of a new macro-hierarchical graphene sponge in batch adsorption and packed column configuration for efficient decontamination of cadmium in aqueous environment
title_short Usage of a new macro-hierarchical graphene sponge in batch adsorption and packed column configuration for efficient decontamination of cadmium in aqueous environment
title_full Usage of a new macro-hierarchical graphene sponge in batch adsorption and packed column configuration for efficient decontamination of cadmium in aqueous environment
title_fullStr Usage of a new macro-hierarchical graphene sponge in batch adsorption and packed column configuration for efficient decontamination of cadmium in aqueous environment
title_full_unstemmed Usage of a new macro-hierarchical graphene sponge in batch adsorption and packed column configuration for efficient decontamination of cadmium in aqueous environment
title_sort usage of a new macro-hierarchical graphene sponge in batch adsorption and packed column configuration for efficient decontamination of cadmium in aqueous environment
publisher Elsevier Science Ltd
publishDate 2021
url http://eprints.um.edu.my/28476/
_version_ 1744649117177479168
score 13.211869

Similar Items