Quantifying arsenic adsorption onto activated aluminum in the presence of other competing elements

ENVR 38

Tingzhi Su, tingzhi@umr.edu, Environmental Research Center-Civil, Architectural and Environmental Engineering Department, University of Missouri-Rolla, 1870 Miner Cirlce, Rolla, MO 65401, Xiaohong Guan, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, China, and Jianmin Wang, wangjia@umr.edu, Envrionmental Research Center-Civil, Architectural and Environmental Engineering Department, University of Missouri-Rolla, 1870 Miner Cirlce, Rolla, MO 65401.
In a previous study we developed a speciation-based multi-site Langmuir model, which incorporates the pH impact, to quantify the arsenate adsorption by NanoActive alumina and activated alumina (Guan and Wang, 2006). This is a continuous work which studied the arsenate adsorption by activated alumina when other competing elements such as vanadium (V) and molybdenum (Mo) are present. The new model not only considered the pH and arsenic loading effects, but also considered the competition effect of these elements. In addition to those four parameters determined for arsenic, three new parameters for V/Mo adsorption were included in these models. All the models can well describe arsenate adsorption in a broad pH range from 2 to 12 and a wide arsenate loading range from 1.0 to 50 mg/g alumina, in the presence of similar loading concentrations of competitive V and/or Mo. This model can be used to predict arsenic adsorption by aluminum oxides in various field water quality conditions.
 

Advances in Adsorption Processes for Drinking Water Treatment and Sourcewater Protection
1:30 PM-5:10 PM, Sunday, April 6, 2008 Morial Convention Center -- Rm. 236, Oral

Division of Environmental Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008