Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 166, Issue 1, Pages 39-45Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2008.10.121
Keywords
Arsenic; Alumina; Adsorption; FTIR; Speciation-based model
Categories
Funding
- Natural Scientific Research Innovation Foundation [HIT.NSRIF.2008.65]
- Development Program for Outstanding Young Teachers at Harbin Institute of Technology [HITQNJS.2007.038]
Ask authors/readers for more resources
Arsenic (As) poses a significant water quality problem and challenge for the environmental engineers and scientists throughout the world. Batch tests were carried out in this study to investigate the adsorption of As(V) on NanoActive alumina. The arsenate adsorption envelopes on NanoActive alumina exhibited broad adsorption maxima when the initial As(V) loading was less than a 50 mg g(-1) sorbent. As the initial As(V) loading increased to 50 mg g(-1) sorbent, a distinct adsorption maximum was observed at pH 3.2-4.6. FTIR spectra revealed that only monodentate complexes were formed upon the adsorption of arsenate on NanoActive alumina over the entire pH range and arsenic loading conditions examined in this study. A speciation-based adsorption model was developed to describe arsenate adsorption on NanoActive alumina and it could simulate arsenate adsorption very well in a broad pH range of 1-10, and a wide arsenic loading range of 0.5-50 mg g(-1) adsorbent. Only four adjustable parameters, including three adsorption constants, were included in this model. This model offers a substantial improvement over existing models in accuracy and simplification in quantifying pH and surface loading effects on arsenic adsorption. (C) 2008 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available