The activated carbon obtained from the shells of Macore fruit was used as an adsorbent for the removal of dyes such as methylene blue (MB) and methyl orange (MO) from synthetic contaminated aqueous solutions. It holds that the adsorption is more favourable at acidic pH, with an optimum adsorption at pH = 2. At this pH, the adsorption rate is more than 98% for the two dyes. The sorption capacity was enhanced by increasing the amount of activated carbon. Above room temperature, the adsorption rates remain constant at a value of approximately 99%. The study of the adsorption kinetics indicates that the adsorption on the studied dyes follows second-order kinetics. The isotherm adsorption data were found to be described by both Langmuir and Freundlich. In addition, the thermodynamic studies revealed that the adsorption process is a favourable, endothermic and spontaneous phenomenon. (C) 2015 Elsevier Ltd. All rights reserved.
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Ft Hays State Univ, Dept Pure & Appl Chem, Alice Campus,Private Bag X1314, ZA-5700 Alice, South Africa
Univ Witwatersrand, Inst Mol Sci, Sch Chem, Private Bag 3, ZA-2050 Johannesburg, South AfricaFt Hays State Univ, Dept Pure & Appl Chem, Alice Campus,Private Bag X1314, ZA-5700 Alice, South Africa
Tavengwa, Nikita Tawanda
Chimuka, Luke
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Univ Witwatersrand, Inst Mol Sci, Sch Chem, Private Bag 3, ZA-2050 Johannesburg, South AfricaFt Hays State Univ, Dept Pure & Appl Chem, Alice Campus,Private Bag X1314, ZA-5700 Alice, South Africa
Chimuka, Luke
Tichagwa, Lilian
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Ft Hays State Univ, Dept Pure & Appl Chem, Alice Campus,Private Bag X1314, ZA-5700 Alice, South Africa
Harare Inst Technol, Dept Polymer Sci & Engn, POB BE 277, Harare, ZimbabweFt Hays State Univ, Dept Pure & Appl Chem, Alice Campus,Private Bag X1314, ZA-5700 Alice, South Africa
机构:
Ft Hays State Univ, Dept Pure & Appl Chem, Alice Campus,Private Bag X1314, ZA-5700 Alice, South Africa
Univ Witwatersrand, Inst Mol Sci, Sch Chem, Private Bag 3, ZA-2050 Johannesburg, South AfricaFt Hays State Univ, Dept Pure & Appl Chem, Alice Campus,Private Bag X1314, ZA-5700 Alice, South Africa
Tavengwa, Nikita Tawanda
Chimuka, Luke
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h-index: 0
机构:
Univ Witwatersrand, Inst Mol Sci, Sch Chem, Private Bag 3, ZA-2050 Johannesburg, South AfricaFt Hays State Univ, Dept Pure & Appl Chem, Alice Campus,Private Bag X1314, ZA-5700 Alice, South Africa
Chimuka, Luke
Tichagwa, Lilian
论文数: 0引用数: 0
h-index: 0
机构:
Ft Hays State Univ, Dept Pure & Appl Chem, Alice Campus,Private Bag X1314, ZA-5700 Alice, South Africa
Harare Inst Technol, Dept Polymer Sci & Engn, POB BE 277, Harare, ZimbabweFt Hays State Univ, Dept Pure & Appl Chem, Alice Campus,Private Bag X1314, ZA-5700 Alice, South Africa