Lead adsorption behaviours on nanoscale zero valent irons (nZVI) coupled with rice husk MCM-41

The aims of this work were to investigate the characteristics of nanoscale zero valent irons (nZVI) coupled with mesoporous materials (RH-MCM-41) adsorbent and to study the removal mechanisms of Pb (II) from synthetical solutions using full pictorial design batch experiments. Synthetic nZVI coupled...

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Main Authors:	C. Kaewbuddee, P. Chanpiwat, P. Kidkhunthod, K. Wantala
Format:	Article
Language:	English
Published:	Penerbit Universiti Kebangsaan Malaysia 2016
Online Access:	http://journalarticle.ukm.my/9991/ http://journalarticle.ukm.my/9991/ http://journalarticle.ukm.my/9991/1/19%20C.%20Kaewbuddee.pdf

id	ukm-9991
recordtype	eprints
spelling	ukm-99912017-01-20T01:19:32Z http://journalarticle.ukm.my/9991/ Lead adsorption behaviours on nanoscale zero valent irons (nZVI) coupled with rice husk MCM-41 C. Kaewbuddee, P. Chanpiwat, P. Kidkhunthod, K. Wantala, The aims of this work were to investigate the characteristics of nanoscale zero valent irons (nZVI) coupled with mesoporous materials (RH-MCM-41) adsorbent and to study the removal mechanisms of Pb (II) from synthetical solutions using full pictorial design batch experiments. Synthetic nZVI coupled with RH MCM-41 as Pb (II) adsorbent were characterized by XRD, TEM, BET and XANES. The results of XANES analyses confirmed the ability of RH-MCM-41 to prevent oxidations of Fe0 to Fe2+ and Fe3+. XANES results also verified the oxidation states of Pb (II). The solution pH was the most significant positive effect in controlling Pb (II) adsorption. The equilibrium and kinetic adsorption isotherms well fitted with the Langmuir isotherm. The pseudo-second order kinetic adsorption indicated that the adsorption process is the rate limiting step for Pb (II) removal. Furthermore, Langmuir-Hinshelwood confirmed the obvious Pb (II) adsorption at the active site of adsorbents. The reduction rate constant (kr = 5,000 mg/L.min) was higher than the adsorption rate constant (Kad = 0.0002 L/mg). Regarding the research results, four pathways including: reduction process, adsorption on FeOOH, adsorption on RH-MCM-41 and complex reaction between Fe and Pb ions were suggested for Pb (II) removal by nZVI coupled with RH-MCM-41. Penerbit Universiti Kebangsaan Malaysia 2016-07 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/9991/1/19%20C.%20Kaewbuddee.pdf C. Kaewbuddee, and P. Chanpiwat, and P. Kidkhunthod, and K. Wantala, (2016) Lead adsorption behaviours on nanoscale zero valent irons (nZVI) coupled with rice husk MCM-41. Sains Malaysiana, 45 (7). pp. 1155-1167. ISSN 0126-6039 http://www.ukm.my/jsm/english_journals/vol45num7_2016/contentsVol45num7_2016.html
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	The aims of this work were to investigate the characteristics of nanoscale zero valent irons (nZVI) coupled with mesoporous materials (RH-MCM-41) adsorbent and to study the removal mechanisms of Pb (II) from synthetical solutions using full pictorial design batch experiments. Synthetic nZVI coupled with RH MCM-41 as Pb (II) adsorbent were characterized by XRD, TEM, BET and XANES. The results of XANES analyses confirmed the ability of RH-MCM-41 to prevent oxidations of Fe0 to Fe2+ and Fe3+. XANES results also verified the oxidation states of Pb (II). The solution pH was the most significant positive effect in controlling Pb (II) adsorption. The equilibrium and kinetic adsorption isotherms well fitted with the Langmuir isotherm. The pseudo-second order kinetic adsorption indicated that the adsorption process is the rate limiting step for Pb (II) removal. Furthermore, Langmuir-Hinshelwood confirmed the obvious Pb (II) adsorption at the active site of adsorbents. The reduction rate constant (kr = 5,000 mg/L.min) was higher than the adsorption rate constant (Kad = 0.0002 L/mg). Regarding the research results, four pathways including: reduction process, adsorption on FeOOH, adsorption on RH-MCM-41 and complex reaction between Fe and Pb ions were suggested for Pb (II) removal by nZVI coupled with RH-MCM-41.
format	Article
author	C. Kaewbuddee, P. Chanpiwat, P. Kidkhunthod, K. Wantala,
spellingShingle	C. Kaewbuddee, P. Chanpiwat, P. Kidkhunthod, K. Wantala, Lead adsorption behaviours on nanoscale zero valent irons (nZVI) coupled with rice husk MCM-41
author_facet	C. Kaewbuddee, P. Chanpiwat, P. Kidkhunthod, K. Wantala,
author_sort	C. Kaewbuddee,
title	Lead adsorption behaviours on nanoscale zero valent irons (nZVI) coupled with rice husk MCM-41
title_short	Lead adsorption behaviours on nanoscale zero valent irons (nZVI) coupled with rice husk MCM-41
title_full	Lead adsorption behaviours on nanoscale zero valent irons (nZVI) coupled with rice husk MCM-41
title_fullStr	Lead adsorption behaviours on nanoscale zero valent irons (nZVI) coupled with rice husk MCM-41
title_full_unstemmed	Lead adsorption behaviours on nanoscale zero valent irons (nZVI) coupled with rice husk MCM-41
title_sort	lead adsorption behaviours on nanoscale zero valent irons (nzvi) coupled with rice husk mcm-41
publisher	Penerbit Universiti Kebangsaan Malaysia
publishDate	2016
url	http://journalarticle.ukm.my/9991/ http://journalarticle.ukm.my/9991/ http://journalarticle.ukm.my/9991/1/19%20C.%20Kaewbuddee.pdf
first_indexed	2023-09-18T19:56:18Z
last_indexed	2023-09-18T19:56:18Z
_version_	1777406552089559040

Lead adsorption behaviours on nanoscale zero valent irons (nZVI) coupled with rice husk MCM-41

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