Comparison of analytical techniques for analysis of arsenic adsorbed on carbon

Nirbhay Narayan Yadav, Saravanamuthu Maheswaran, Vaithiyalingam Shutthanandan, Suntharampillai Thevuthasan, Todd R. Hart, Huu Hao Ngo, Saravanamuthu Vigneswaran

Research output: Contribution to journalArticle

1 Citation (Scopus)

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.

Original languageEnglish
Pages (from-to)185-189
Number of pages5
JournalWater Quality Research Journal of Canada
Volume41
Issue number2
Publication statusPublished - 2006
Externally publishedYes

Fingerprint

activated carbon
arsenic
analytical method
carbon
comparison
analysis
spectrometry
inhomogeneity
trace metal
surface area
adsorption
plasma

Keywords

  • Activated carbon
  • Adsorption
  • Inhomogeneous structures
  • PIXE

ASJC Scopus subject areas

  • Water Science and Technology

Cite this

Yadav, N. N., Maheswaran, S., Shutthanandan, V., Thevuthasan, S., Hart, T. R., Ngo, H. H., & Vigneswaran, S. (2006). Comparison of analytical techniques for analysis of arsenic adsorbed on carbon. Water Quality Research Journal of Canada, 41(2), 185-189.

Comparison of analytical techniques for analysis of arsenic adsorbed on carbon. / Yadav, Nirbhay Narayan; Maheswaran, Saravanamuthu; Shutthanandan, Vaithiyalingam; Thevuthasan, Suntharampillai; Hart, Todd R.; Ngo, Huu Hao; Vigneswaran, Saravanamuthu.

In: Water Quality Research Journal of Canada, Vol. 41, No. 2, 2006, p. 185-189.

Research output: Contribution to journalArticle

Yadav, NN, Maheswaran, S, Shutthanandan, V, Thevuthasan, S, Hart, TR, Ngo, HH & Vigneswaran, S 2006, 'Comparison of analytical techniques for analysis of arsenic adsorbed on carbon', Water Quality Research Journal of Canada, vol. 41, no. 2, pp. 185-189.
Yadav NN, Maheswaran S, Shutthanandan V, Thevuthasan S, Hart TR, Ngo HH et al. Comparison of analytical techniques for analysis of arsenic adsorbed on carbon. Water Quality Research Journal of Canada. 2006;41(2):185-189.
Yadav, Nirbhay Narayan ; Maheswaran, Saravanamuthu ; Shutthanandan, Vaithiyalingam ; Thevuthasan, Suntharampillai ; Hart, Todd R. ; Ngo, Huu Hao ; Vigneswaran, Saravanamuthu. / Comparison of analytical techniques for analysis of arsenic adsorbed on carbon. In: Water Quality Research Journal of Canada. 2006 ; Vol. 41, No. 2. pp. 185-189.
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