High performance adsorbents synthesized by sol-gel processing

J. S. Lee, S. Gomez-Salazar, N. V. Deorkar, L. L. Tavlarides

Research output: Contribution to conferencePaperpeer-review


A new high performance adsorbent is synthesized by the sol-gel method and applied to the removal of cadmium and mercury ions from aqueous solutions. Adsorbents based on metal oxides have been developed by immobilizing chelating molecules on the surface of the existing metal oxide networks and show ability for selective metal extraction from aqueous solutions. However, efficiencies of such adsorbents are limited due to low ligand density, and difficulty in pore accessibility. These difficulties are circumvented by synthesizing adsorbents using the sol-gel technique. In one example to be discussed, the sol-precursor possesses an organic moiety that binds cadmium, mercury, and copper ions. The capacities of 1.98 mmol Cd(II)/gm and 6.40 mmol Hg/gm of this adsorbent are considerably higher than those of adsorbents prepared by the ligand immobilization technique. The scope of this paper is to discuss the development of the new adsorbent and its applications for cadmium and mercury removal from aqueous solutions.

Original languageEnglish (US)
Number of pages9
StatePublished - 1999
EventMetal Separation Technology Beyond 2000: Integrating Novel Chemistry with Processing - Oahu, HI, USA
Duration: Jun 13 1999Jun 18 1999


OtherMetal Separation Technology Beyond 2000: Integrating Novel Chemistry with Processing
CityOahu, HI, USA

ASJC Scopus subject areas

  • General Engineering


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