Comparison of analytical techniques for analysis of arsenic adsorbed on carbon

Yadav, NN; Maheswaran, S; Shutthanandan, V; Thevuthasan, S; Hart, TR; Ngo, HH; Vigneswaran, S

Comparison of analytical techniques for analysis of arsenic adsorbed on carbon

Yadav, NN Maheswaran, S Shutthanandan, V Thevuthasan, S Hart, TR Ngo, HH

Vigneswaran, S

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Publication Type:: Journal Article
Citation:: Water Quality Research Journal of Canada, 2006, 41 (2), pp. 185 - 189
Issue Date:: 2006-08-17

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Field	Value	Language
dc.contributor.author	Yadav, NN	en_US
dc.contributor.author	Maheswaran, S	en_US
dc.contributor.author	Shutthanandan, V	en_US
dc.contributor.author	Thevuthasan, S	en_US
dc.contributor.author	Hart, TR	en_US
dc.contributor.author	Ngo, HH https://orcid.org/0000-0002-0296-2866	en_US
dc.contributor.author	Vigneswaran, S https://orcid.org/0000-0002-8117-4322	en_US
dc.date.issued	2006-08-17	en_US
dc.identifier.citation	Water Quality Research Journal of Canada, 2006, 41 (2), pp. 185 - 189	en_US
dc.identifier.issn	1201-3080	en_US
dc.identifier.uri	http://hdl.handle.net/10453/4153
dc.description.abstract	Activated carbon (AC) has been used extensively to treat arsenic-contaminated groundwater for a number of years. To date, attempts to quantify directly the amount of arsenic removed by the activated carbon using nondestructive methods has been limited. High-energy ion beam based proton induced x-ray emission (PIXE) is ideally suited to investigate the issues regarding the quantification of trace metals in solids. In this study, after the adsorption of arsenic on activated carbon, arsenic concentration in granular activated carbon (GAC) and powder activated carbon (PAC) were quantified using Pixe. The PIXE results were compared with atomic absorption spectrometry (AAS) and inductively coupled plasma optical emission spectrometry (ICP-OES) measurements. Some differences are observed between these measurements. The differences are greater in the case of GAC compared to PAC. These differences are mainly due to the inhomogeneous structure of GAC and PAC, which includes the variable surface properties such as surface area and pore sizes in each granule or particle. The larger differences are mainly due to the increased particle dimensions of GAC compared to PAC and the nature of the internal pore structure of GAC, which results in different amounts of arsenic adsorbed on different granules of GAC or even in different regions of one granule. This inhomogeneity of arsenic concentration is clearly visible in the arsenic concentration map generated for a single GAC particle using microbeam PIXE. Copyright © 2006, CAWQ.	en_US
dc.relation.ispartof	Water Quality Research Journal of Canada	en_US
dc.subject.classification	Environmental Engineering	en_US
dc.title	Comparison of analytical techniques for analysis of arsenic adsorbed on carbon	en_US
dc.type	Journal Article
utslib.citation.volume	2	en_US
utslib.citation.volume	41	en_US
utslib.for	090799 Environmental Engineering not elsewhere classified	en_US
utslib.for	090703 Environmental Technologies	en_US
utslib.for	090701 Environmental Engineering Design	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access
pubs.issue	2	en_US
pubs.publication-status	Published	en_US
pubs.volume	41	en_US

Abstract:

Activated carbon (AC) has been used extensively to treat arsenic-contaminated groundwater for a number of years. To date, attempts to quantify directly the amount of arsenic removed by the activated carbon using nondestructive methods has been limited. High-energy ion beam based proton induced x-ray emission (PIXE) is ideally suited to investigate the issues regarding the quantification of trace metals in solids. In this study, after the adsorption of arsenic on activated carbon, arsenic concentration in granular activated carbon (GAC) and powder activated carbon (PAC) were quantified using Pixe. The PIXE results were compared with atomic absorption spectrometry (AAS) and inductively coupled plasma optical emission spectrometry (ICP-OES) measurements. Some differences are observed between these measurements. The differences are greater in the case of GAC compared to PAC. These differences are mainly due to the inhomogeneous structure of GAC and PAC, which includes the variable surface properties such as surface area and pore sizes in each granule or particle. The larger differences are mainly due to the increased particle dimensions of GAC compared to PAC and the nature of the internal pore structure of GAC, which results in different amounts of arsenic adsorbed on different granules of GAC or even in different regions of one granule. This inhomogeneity of arsenic concentration is clearly visible in the arsenic concentration map generated for a single GAC particle using microbeam PIXE. Copyright © 2006, CAWQ.

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http://hdl.handle.net/10453/4153