Publication: Optimization of As(V) adsorption on Fe-RH-MCM-41-immobilized GAC using Box-Behnken Design: Effects of pH, loadings, and initial concentrations
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Issued Date
2012
Resource Type
File Type
application/pdf
ISSN
8832927
Other identifier(s)
2-s2.0-84859013610
Rights Holder(s)
Scopus
Bibliographic Citation
Applied Geochemistry. Vol 27, No.5 (2012), p.1027-1034
Suggested Citation
Wantala K., Khongkasem E., Khlongkarnpanich N., Sthiannopkao S., Kim K.-W. Optimization of As(V) adsorption on Fe-RH-MCM-41-immobilized GAC using Box-Behnken Design: Effects of pH, loadings, and initial concentrations. Applied Geochemistry. Vol 27, No.5 (2012), p.1027-1034. doi:10.1016/j.apgeochem.2011.11.014 Retrieved from: https://hdl.handle.net/20.500.14740/7069
Abstract
This work focused on the removal from water of arsenate in the 100 to 500. μg/L range using Fe-RH-MCM-41 immobilized on GAC by a colloidal impregnation method. A Response Surface Method (RSM) based on the Box-Behnken Design (BBD) was used to evaluate the effects of pH, adsorbent loading, and initial arsenate concentrations. The thermal stability of Fe-RH-MCM-41/GAC was greater than 460. °C because Fe-RH-MCM-41 and epoxy resin covered the GAC, preventing GAC weight loss. The rate and capacity for arsenate adsorption on Fe-RH-MCM-41/GAC were higher than for GAC. The effects of pH, adsorbent loading, and initial arsenate concentration showed significant effects on efficiency, in terms of percent arsenate removal. Significant interaction occurred as positive effects between arsenate and arsenate concentrations, and pH and arsenate concentrations, and as negative effects between pH and pH, adsorbent loading and adsorbent loading, and adsorbent loading and arsenate concentrations. © 2011 Elsevier Ltd.
Subject(s)
Arsenate adsorption
Arsenate removal
Box-Behnken design
Colloidal impregnation
Initial concentration
Response surface method
Weight loss
Adsorption
Epoxy resins
Loading
Water treatment
PH effects
Adsorption
Arsenic
Concentration (composition)
Design
Immobilization
Optimization
PH
Pollutant removal
Resin
Arsenate removal
Box-Behnken design
Colloidal impregnation
Initial concentration
Response surface method
Weight loss
Adsorption
Epoxy resins
Loading
Water treatment
PH effects
Adsorption
Arsenic
Concentration (composition)
Design
Immobilization
Optimization
PH
Pollutant removal
Resin