Porous materials for the co-adsorption/electrosorption of arsenic and chromium species from aqueous solutions

Euan James Bain, Joseph M. Calo

Research output: Contribution to conferencePaper

Abstract

We are currently developing porous materials for the effective removal of mixtures of heavy metal compounds from aqueous solutions, both as normal adsorbents and as electrosorbents. An electrochemical cell with a fixed bed of adsorbent as one of the electrodes has been constructed in order to investigate the electrochemical behavior of adsorbents with various adsorbates. Here we present our initial results from chronoamperometry experiments of the electrosorption of arsenic on DARCO lignite char. We also report on the adsorption of arsenic and chromium solutions and their mixtures on Davankov-type hypercrosslinked resins (1,120m2g-1). It was found that the equilibration time for 500 ml of an As solution with an initial concentration of 100 ppb on 62 mg of resin was greater than 24h. At this point, the non–equilibrium adsorption was 0.00015 g As/g. It was observed that for co-adsorption of arsenic and chromium, the rate of chromium uptake is more rapid than that of arsenic and the presence of chromium decreases total arsenic adsorption.
Original languageEnglish
Publication statusPublished - Aug 2007
Event234th ACS National Meeting - Boston, United States
Duration: 19 Aug 200723 Aug 2007

Conference

Conference234th ACS National Meeting
CountryUnited States
CityBoston
Period19/08/0723/08/07

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Bain, E. J., & Calo, J. M. (2007). Porous materials for the co-adsorption/electrosorption of arsenic and chromium species from aqueous solutions. Paper presented at 234th ACS National Meeting, Boston, United States.