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You searched for +publisher:"Cape Peninsula University of Technology" +contributor:("Ximba, Bhekumusa J., Prof"). Showing records 1 – 2 of 2 total matches.

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Cape Peninsula University of Technology

1. Kakalanga, Sumbu. Nickel pollution abatement from landfill leachate using biomaterials .

Degree: 2012, Cape Peninsula University of Technology

Batch experiments were conducted to assess the removal of Ni(II) from aqueous solutions and landfill leachates using low cost adsorbents eggplant peel (EGP), sweet potato peel (SWP) and banana peel (BNP). Preliminary studies were carried out to optimize biosorbent mass, pH, Ni(II) concentration, temperature and contact time for Ni(II) removal. The optimized conditions were then applied to landfill leachates using the selected low cost adsorbents. Ni(II) removal efficiency for each biosorbent was investigated for each parameter. Results indicated that biosorbents masses, pH, initial concentration as well as solution temperature were important factors influencing Ni(II) removal from aqueous solutions. Percentage Ni(II) removal was 66±0.30, 38±3.97 and 33±1.20 using EGP, SWP and BNP, respectively. Ni(II) removal efficiency increased significantly (P ≤ 0.05) with increasing biosorbent mass, pH and Ni(II) initial concentration while it decreased significantly (P ≤ 0.05) with increasing temperature. Although Ni(II) removal efficiency varied significantly with time and the biosorbents no significant (P 0.05) difference was observed between the time interval whether the experiment was conducted in batch or semi batch mode. Results of FTIR studies indicated that several binding and chelating functional groups such as carboxyl, carbonyl and hydroxyl groups on the biomaterials surfaces could be responsible for Ni(II) biosorption. The optimum biosorbent mass for EGP and SWP was 0.4 g and for BNP was 0.05 g. The values for initial concentration, pH, temperature and contact time were 100 mg/L, 5, 22 °C and 2 hours, respectively. Ni(II) removal efficiencies using EGP, SWP and BNP were 66, 38 and 33%, respectively. Taking into account the result and optimum condition obtained on Ni(II) removal efficiency from aqueous solution using EGP, SWP and BNP, the Ni(II) removal efficiency using these biosorbents from landfill leachate was investigated. It was found to be significantly (P ≤ 0.05) lower than what was found from aqueous solution. Advisors/Committee Members: Opeolu, Beatrice O., Prof (advisor), Ximba, Bhekumusa J., Prof (advisor).

Subjects/Keywords: Nickel; Leachate; Pollution; Sanitary landfills  – Leaching; Biomedical materials; Dissertations, Academic; MTech; Theses, dissertations, etc.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Kakalanga, S. (2012). Nickel pollution abatement from landfill leachate using biomaterials . (Thesis). Cape Peninsula University of Technology. Retrieved from http://etd.cput.ac.za/handle/20.500.11838/748

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Kakalanga, Sumbu. “Nickel pollution abatement from landfill leachate using biomaterials .” 2012. Thesis, Cape Peninsula University of Technology. Accessed October 30, 2020. http://etd.cput.ac.za/handle/20.500.11838/748.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Kakalanga, Sumbu. “Nickel pollution abatement from landfill leachate using biomaterials .” 2012. Web. 30 Oct 2020.

Vancouver:

Kakalanga S. Nickel pollution abatement from landfill leachate using biomaterials . [Internet] [Thesis]. Cape Peninsula University of Technology; 2012. [cited 2020 Oct 30]. Available from: http://etd.cput.ac.za/handle/20.500.11838/748.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kakalanga S. Nickel pollution abatement from landfill leachate using biomaterials . [Thesis]. Cape Peninsula University of Technology; 2012. Available from: http://etd.cput.ac.za/handle/20.500.11838/748

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Cape Peninsula University of Technology

2. Afolabi, Wasiu Olalekan. The effectiveness of vitis vinifera (grape) leaf litter to remove U.S. EPA priority phenols from simulated and industrial wastewaters .

Degree: 2014, Cape Peninsula University of Technology

This study sought to prepare and characterise activated carbons from Vitis vinifera (grape) leaf litter, and assess the efficiency and potential application of the adsorbent for the removal of four phenolic compounds (phenol (P), 2-nitrophenol (2-NP), 4-nitrophenol (4-NP) and 2-chlorophenol (2-CP)) from synthetic and industrial wastewaters. Vitis vinifera (grape) leaf litter (GL) was obtained locally, and washed, dried and pulvirized. Chemically activated carbons were prepared using H3PO4 (GLA) and NaOH (GLB). The adsorbents were characterized with SEM, FTIR, EDX and proximate analysis was also carried out. Phenols were extracted from water samples with SPE and analysed with HPLC. The prepared adsorbents were used in sorption of phenols from simulated phenolic wastewaters for optimization of adsorption. Optimal adsorption conditions were then applied for removal of phenols from wastewater samples collected from influents of treatment plants. Column and desorption studies were also carried out. The surface texture and morphology micrographs (using SEM) of the prepared materials/adsorbents showed that the prepared activated carbons possess improved pore structure, cavities and heterogeneous irregular surfaces capable of providing enhanced adsorption. EDX spectroscopy was used for elemental microanalysis and showed that the major constituent of the adsorbent is carbon. FTIR analysis revealed changes and absorption waveband drifts of surface functional groups after activation and adsorption. The proximate analysis of the prepared precursors demonstrated good quality of the active carbons. They had low moisture content (< 12%) and their inorganic matter content (ash) was less than 9% for the three sorbents. Iodine number value of the adsorbents was 342, 1065, and 571 mg/g for GL, GLA and GLB respectively. Excellent recoveries (92.60 – 102.85%) were obtained for the phenolic compounds (P, 2-NP, 4-NP and 2-CP) using polymeric SPE cartridges. Phosphoric acid activation yielded the most efficient activated carbon material relative to the non-treated biomass and those chemically activated with NaOH. Percentage removal was 92.70%, 99.92%, 99.98% and 99.90% for P, 2-NP, 4-NP and 2-CP respectively using GLA. Optimal pH for adsorption was 8, 4 and 7 for GLA, GLB and GL respectively at an equilibration time of 240 min. The evaluation of adsorption kinetics showed the adsorption process of GLA and GLB followed a pseudo-second order kinetic model while adsorption using GL was best described by intraparticle diffusion model. Adsorption equilibrium data were well fitted with Freundlich isotherm model for all three adsorbents. Adsorption capacity of GLA (for removal of phenols) was found to decrease with increase in temperature. In contrast, the sorption efficiency of GL and GLB increased when temperature was increased. Thermodynamic parameters of adsorption (ΔGo, ΔHo & ΔSo) were evaluated. Results revealed favourability and exothermic nature of adsorption of the phenols using GLA. Adsorption processes using GLB and GL… Advisors/Committee Members: Opeolu, Beatrice O., Prof (advisor), Fakoti, Olalekan S., Prof (advisor), Ximba, Bhekumusa J., Prof (advisor).

Subjects/Keywords: Viticulture; Water  – Purification; Grapes

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Afolabi, W. O. (2014). The effectiveness of vitis vinifera (grape) leaf litter to remove U.S. EPA priority phenols from simulated and industrial wastewaters . (Thesis). Cape Peninsula University of Technology. Retrieved from http://etd.cput.ac.za/handle/20.500.11838/750

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Afolabi, Wasiu Olalekan. “The effectiveness of vitis vinifera (grape) leaf litter to remove U.S. EPA priority phenols from simulated and industrial wastewaters .” 2014. Thesis, Cape Peninsula University of Technology. Accessed October 30, 2020. http://etd.cput.ac.za/handle/20.500.11838/750.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Afolabi, Wasiu Olalekan. “The effectiveness of vitis vinifera (grape) leaf litter to remove U.S. EPA priority phenols from simulated and industrial wastewaters .” 2014. Web. 30 Oct 2020.

Vancouver:

Afolabi WO. The effectiveness of vitis vinifera (grape) leaf litter to remove U.S. EPA priority phenols from simulated and industrial wastewaters . [Internet] [Thesis]. Cape Peninsula University of Technology; 2014. [cited 2020 Oct 30]. Available from: http://etd.cput.ac.za/handle/20.500.11838/750.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Afolabi WO. The effectiveness of vitis vinifera (grape) leaf litter to remove U.S. EPA priority phenols from simulated and industrial wastewaters . [Thesis]. Cape Peninsula University of Technology; 2014. Available from: http://etd.cput.ac.za/handle/20.500.11838/750

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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