Email updates

Keep up to date with the latest news and content from Journal of Environmental Health Science and Engineering and BioMed Central.

Open Access Research article

Evaluation and comparison of aluminum-coated pumice and zeolite in arsenic removal from water resources

Simin Nasseri1 and Masoumeh Heidari2*

Author Affiliations

1 Department of Environmental Health Engineering, School of Public Health and Center for Water Quality Research, Institute of Environmental Research, Tehran University of Medical Sciences, Tehran, Iran

2 Department of Environmental Sciences, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran

For all author emails, please log on.

Iranian Journal of Environmental Health Science & Engineering 2012, 9:38  doi:10.1186/1735-2746-9-38

Published: 31 December 2012

Abstract

In this research the potential of aluminum-coated pumice and zeolite in arsenic, As (V) removal was investigated and compared. Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD) and X-Ray Flaorescence Spectrometry (XRF) were carried out to determine the properties of the adsorbents. Several parameters including adsorbent dosage] pH, contact time, and initial As(V) concentration were studied. The optimum pH obtained for both adsorbents was pH = 7. As(V) adsorption by both adsorbents followed the Freundlich isotherm (for aluminum-coated pumice and zeolite respectively with R2 > 0.98 and R2 > 0.99). The obtained data from kinetics showed that the pseudo-second order model could better explain As(V) adsorption for both aluminum-coated pumice and zeolite (R2 > 0.98 and R2 > 0.99 respectively). Because of low cost, both adsorbents may be economically used, but aluminum-coated zeolite showed high efficiency of, due to its porosity and surface area. More than 96% of As(V) with initial concentration of 250 μg/L was removed by 10 g/L aluminum-coated zeolite at pH = 7 and in 60 minutes to achieve As(V) concentration of 10 μg/L, while only 71% of As(V) could be removed by aluminum-coated pumice.

Keywords:
Arsenic adsorption; Water resources; Aluminum-coated pumice; Aluminum-coated zeolite