화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.21, 653-661, January, 2015
DOI10.1016/j.jiec.2014.03.033  Export Citation
Activating natural bentonite as a cost-effective adsorbent for removal of Congo-red in wastewater
Manjot Toor, Bo Jin†, Sheng Dai, and Vipasiri Vimonses1
  • School of Chemical Engineering, The University of Adelaide, Adelaide 5005, SA, Australia
  • 1Santos GLNG Project, 32 Turbot Street, Brisbane 4455, QLD, Australia
E-mail:
The bentonite is a widely available and abundant natural mineral, and can be a low cost adsorbent for water and wastewater treatment. This study reported here was directed towards identifying a costeffective activation protocol for enhancing the adsorption capacity of Australian bentonite for removal of toxic contaminants in wastewater. We investigated three protocols including thermal activation (TA), acid activation (AA), and combined acid and thermal activation (ATA). The results showed that these activation protocols under designed conditions can enhance the surface area and porosity of the raw bentonite. The best ATA protocol considered here brought a 70% increase in the surface area compared to 65% and 20% for the best AA and TA protocols, respectively. The optimal ATA protocol identified in the study leads to approximately 25% increase in the Congo-red adsorption capacity of the activated bentonite. This activation method could be a cost-effective approach to enhance the adsorption capacity,applicability and selectivity of natural clay materials,making them as promising and low cost adsorbents for wastewater treatment.
Keywords:Activation;Adsorption;Bentonite;Congo red;Surface properties
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