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Chemically Modified Sago Fly Ash for Pb(II) Removal from Water

The use of agricultural by-products has been widely studied to develop effective and inexpensive adsorbent for heavy metal removal. In this study, sago (M.sagu) fly ash (FA) was chemically modified to afford an operational adsorbent for Pb(II) elimination from water. Chemical modification was carri...

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Main Authors: Rafeah, Wahi, Showkat, Ahmad Bhawani, Zainab, Ngaini, Nur Farhana, Yusof, Nur Hanani, Hasana
Format: Article
Language:English
Published: Trans Tech Publications Ltd, Switzerland 2021
Subjects:
QD Chemistry
Online Access:http://ir.unimas.my/id/eprint/36050/1/ash1.pdf
http://ir.unimas.my/id/eprint/36050/
https://www.scientific.net/DDF.411
https://doi.org/10.4028/www.scientific.net/DDF.411.93
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spelling my.unimas.ir.360502021-09-09T07:06:59Z http://ir.unimas.my/id/eprint/36050/ Chemically Modified Sago Fly Ash for Pb(II) Removal from Water Rafeah, Wahi Showkat, Ahmad Bhawani Zainab, Ngaini Nur Farhana, Yusof Nur Hanani, Hasana QD Chemistry The use of agricultural by-products has been widely studied to develop effective and inexpensive adsorbent for heavy metal removal. In this study, sago (M.sagu) fly ash (FA) was chemically modified to afford an operational adsorbent for Pb(II) elimination from water. Chemical modification was carried out via acid-base treatment using NaOH and HCl. The chemically modified fly ash (MFA) was characterized via proximate, surface morphology, and functional groups' surface area analyses. The effects of adsorption parameters, namely, Pb(II) initial concentration, sorbent dosage and contact time on the eradication of Pb(II) by MFA was analyzed in batch experiments with Langmuir and Freundlich isotherms. Optimization of Pb(II) removal by MFA was studied via response surface methodology (RSM) approach. Results revealed that chemical modification has successfully enhanced the adsorptive properties of MFA (BET surface area: 231.4 m2 /g, fixed carbon: 55.83%). MFA exhibits better Pb(II) removal efficiency (90.8%) compared to FA (63.6%) at the following adsorption condition: Pb(II) initial concentration (5 ppm), contact time (30 min) and agitation speed (150 rpm). The adsorption of Pb(II) by FA and MFA fitted well with Freundlich isotherm (R2>0.9). RSM study suggested that the optimum Pb(II) removal was 99.4% at the following conditions: Pb(II) initial concentration (20 ppm), contact time (2 h) and sorbent dosage (0.6 g/50 mL). The results concluded the potential optimum operational condition for Pb(II) removal from aqueous environment by MFA as a low cost adsorbent, at larger scale. Trans Tech Publications Ltd, Switzerland 2021-09-08 Article PeerReviewed text en http://ir.unimas.my/id/eprint/36050/1/ash1.pdf Rafeah, Wahi and Showkat, Ahmad Bhawani and Zainab, Ngaini and Nur Farhana, Yusof and Nur Hanani, Hasana (2021) Chemically Modified Sago Fly Ash for Pb(II) Removal from Water. Defect and Diffusion Forum, 411 (2021). pp. 93-105. ISSN 1662-9507 https://www.scientific.net/DDF.411 https://doi.org/10.4028/www.scientific.net/DDF.411.93
institution Universiti Malaysia Sarawak
building Centre for Academic Information Services (CAIS)
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sarawak
content_source UNIMAS Institutional Repository
url_provider http://ir.unimas.my/
language English
topic QD Chemistry
spellingShingle QD Chemistry
Rafeah, Wahi
Showkat, Ahmad Bhawani
Zainab, Ngaini
Nur Farhana, Yusof
Nur Hanani, Hasana
Chemically Modified Sago Fly Ash for Pb(II) Removal from Water
description The use of agricultural by-products has been widely studied to develop effective and inexpensive adsorbent for heavy metal removal. In this study, sago (M.sagu) fly ash (FA) was chemically modified to afford an operational adsorbent for Pb(II) elimination from water. Chemical modification was carried out via acid-base treatment using NaOH and HCl. The chemically modified fly ash (MFA) was characterized via proximate, surface morphology, and functional groups' surface area analyses. The effects of adsorption parameters, namely, Pb(II) initial concentration, sorbent dosage and contact time on the eradication of Pb(II) by MFA was analyzed in batch experiments with Langmuir and Freundlich isotherms. Optimization of Pb(II) removal by MFA was studied via response surface methodology (RSM) approach. Results revealed that chemical modification has successfully enhanced the adsorptive properties of MFA (BET surface area: 231.4 m2 /g, fixed carbon: 55.83%). MFA exhibits better Pb(II) removal efficiency (90.8%) compared to FA (63.6%) at the following adsorption condition: Pb(II) initial concentration (5 ppm), contact time (30 min) and agitation speed (150 rpm). The adsorption of Pb(II) by FA and MFA fitted well with Freundlich isotherm (R2>0.9). RSM study suggested that the optimum Pb(II) removal was 99.4% at the following conditions: Pb(II) initial concentration (20 ppm), contact time (2 h) and sorbent dosage (0.6 g/50 mL). The results concluded the potential optimum operational condition for Pb(II) removal from aqueous environment by MFA as a low cost adsorbent, at larger scale.
format Article
author Rafeah, Wahi
Showkat, Ahmad Bhawani
Zainab, Ngaini
Nur Farhana, Yusof
Nur Hanani, Hasana
author_facet Rafeah, Wahi
Showkat, Ahmad Bhawani
Zainab, Ngaini
Nur Farhana, Yusof
Nur Hanani, Hasana
author_sort Rafeah, Wahi
title Chemically Modified Sago Fly Ash for Pb(II) Removal from Water
title_short Chemically Modified Sago Fly Ash for Pb(II) Removal from Water
title_full Chemically Modified Sago Fly Ash for Pb(II) Removal from Water
title_fullStr Chemically Modified Sago Fly Ash for Pb(II) Removal from Water
title_full_unstemmed Chemically Modified Sago Fly Ash for Pb(II) Removal from Water
title_sort chemically modified sago fly ash for pb(ii) removal from water
publisher Trans Tech Publications Ltd, Switzerland
publishDate 2021
url http://ir.unimas.my/id/eprint/36050/1/ash1.pdf
http://ir.unimas.my/id/eprint/36050/
https://www.scientific.net/DDF.411
https://doi.org/10.4028/www.scientific.net/DDF.411.93
_version_ 1710679810183790592
score 13.211869

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