Thermodynamics of Cu (II) adsorption onto South African clinoptilolite from synthetic solution by ion exchange process.
- Kabuba, John, Ntuli, Freeman, Muzenda, Edison, Mollagee, Mansoor
- Authors: Kabuba, John , Ntuli, Freeman , Muzenda, Edison , Mollagee, Mansoor
- Date: 2011
- Subjects: Clinoptilolite , Adsorption , Thermodynamics , Langmuir isotherm
- Type: Article
- Identifier: uj:6250 , ISSN 2010-4618 , http://hdl.handle.net/10210/8194
- Description: The adsorption of Cu (II) ions from aqueous solution onto clinoptilolite from synthetic solutions by ion exchange was investigated. The effects of solution pH and temperature were examined. The Langmuir isotherm model was employed to calculate the different thermodynamics parameters. Thermodynamics studies revealed that the adsorption behavior of Cu (II) ions onto clinoptilolite was a spontaneous and endothermic process, resulting in higher adsorption capacities at higher temperatures.
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- Authors: Kabuba, John , Ntuli, Freeman , Muzenda, Edison , Mollagee, Mansoor
- Date: 2011
- Subjects: Clinoptilolite , Adsorption , Thermodynamics , Langmuir isotherm
- Type: Article
- Identifier: uj:6250 , ISSN 2010-4618 , http://hdl.handle.net/10210/8194
- Description: The adsorption of Cu (II) ions from aqueous solution onto clinoptilolite from synthetic solutions by ion exchange was investigated. The effects of solution pH and temperature were examined. The Langmuir isotherm model was employed to calculate the different thermodynamics parameters. Thermodynamics studies revealed that the adsorption behavior of Cu (II) ions onto clinoptilolite was a spontaneous and endothermic process, resulting in higher adsorption capacities at higher temperatures.
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Kinetics study of ammonia removal from synthetic waste water
- Muzenda, Edison, Kabuba, John, Ntuli, Freeman, Mollagee, Mansoor
- Authors: Muzenda, Edison , Kabuba, John , Ntuli, Freeman , Mollagee, Mansoor
- Date: 2011
- Subjects: Ammonium exchange , Langmuir isotherm , Clinoptilolite , Synthetic waste water
- Type: Article
- Identifier: uj:4698 , http://hdl.handle.net/10210/10933
- Description: The aim of this study was to investigate ammonium exchange capacity of natural and activated clinoptilolite from Kwazulu-Natal Province, South Africa. X-ray fluorescence (XRF) analysis showed that the clinoptilolite contained exchangeable ions of sodium, potassium, calcium and magnesium. This analysis also confirmed that the zeolite sample had a high silicon composition compared to aluminium. Batch equilibrium studies were performed in an orbital shaker and the data fitted the Langmuir isotherm very well. The ammonium exchange capacity was found to increase with pH and temperature. Clinoptilolite functionalization with hydrochloric acid increased its ammonia uptake ability.
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- Authors: Muzenda, Edison , Kabuba, John , Ntuli, Freeman , Mollagee, Mansoor
- Date: 2011
- Subjects: Ammonium exchange , Langmuir isotherm , Clinoptilolite , Synthetic waste water
- Type: Article
- Identifier: uj:4698 , http://hdl.handle.net/10210/10933
- Description: The aim of this study was to investigate ammonium exchange capacity of natural and activated clinoptilolite from Kwazulu-Natal Province, South Africa. X-ray fluorescence (XRF) analysis showed that the clinoptilolite contained exchangeable ions of sodium, potassium, calcium and magnesium. This analysis also confirmed that the zeolite sample had a high silicon composition compared to aluminium. Batch equilibrium studies were performed in an orbital shaker and the data fitted the Langmuir isotherm very well. The ammonium exchange capacity was found to increase with pH and temperature. Clinoptilolite functionalization with hydrochloric acid increased its ammonia uptake ability.
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Thermally activated attapulgite as an adsorbent for heavy metals
- Ntuli, Freeman, Falayi, Thabo, Dlamini, Thabani
- Authors: Ntuli, Freeman , Falayi, Thabo , Dlamini, Thabani
- Date: 2013
- Subjects: Adsorption , Attapulgite , Heavy metals , Langmuir isotherm
- Type: Article
- Identifier: uj:4854 , http://hdl.handle.net/10210/12530
- Description: Thermal activation of attapulgite was investigated. Attapulgite calcined at 6000C was used as an adsorbent for heavy metals in AMD. The effect of solid loading, residence time and adsorption temperature was investigated. Activated attapulgite showed that it could remove more than 99% of Fe, Cu, Co and Ni from AMD. Langmuir isotherm gave the best fit for the adsorption process with maximum adsorption capacities of 8.97, 0.20, 0.32 and 0.32 for Fe, Ni, Cu and Co respectively. The adsorption of Cu and Ni was thermodynamically. The results show that thermally activated attapulgite has potential as an adsorbent for heavy metals from AMD.
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- Authors: Ntuli, Freeman , Falayi, Thabo , Dlamini, Thabani
- Date: 2013
- Subjects: Adsorption , Attapulgite , Heavy metals , Langmuir isotherm
- Type: Article
- Identifier: uj:4854 , http://hdl.handle.net/10210/12530
- Description: Thermal activation of attapulgite was investigated. Attapulgite calcined at 6000C was used as an adsorbent for heavy metals in AMD. The effect of solid loading, residence time and adsorption temperature was investigated. Activated attapulgite showed that it could remove more than 99% of Fe, Cu, Co and Ni from AMD. Langmuir isotherm gave the best fit for the adsorption process with maximum adsorption capacities of 8.97, 0.20, 0.32 and 0.32 for Fe, Ni, Cu and Co respectively. The adsorption of Cu and Ni was thermodynamically. The results show that thermally activated attapulgite has potential as an adsorbent for heavy metals from AMD.
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