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- 저자 : Vipasiri Vimonses (검색결과 1 건)
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Activating natural bentonite as a cost-effective adsorbent for removal of Congo-red in wastewater
Manjot Toor,Bo Jin,Sheng Dai,Vipasiri Vimonses 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
The bentonite is a widely available and abundant natural mineral, and can be a low cost adsorbent forwater and wastewater treatment. This study reported here was directed towards identifying a costeffectiveactivation protocol for enhancing the adsorption capacity of Australian bentonite for removal oftoxic 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 theseactivation protocols under designed conditions can enhance the surface area and porosity of the rawbentonite. The best ATA protocol considered here brought a 70% increase in the surface area compared to65% and 20% for the best AA and TA protocols, respectively. The optimal ATA protocol identified in thestudy leads to approximately 25% increase in the Congo-red adsorption capacity of the activatedbentonite. 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 adsorbentsfor wastewater treatment.
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