Municipal solid waste composition determination in the city of Johannesburg
- Ayeleru, Olusola Olaitan, Ntuli, Freeman, Mbohwa, Charles
- Authors: Ayeleru, Olusola Olaitan , Ntuli, Freeman , Mbohwa, Charles
- Date: 2016
- Subjects: City of Johannesburg , Municipal solid waste , Robinson deep
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/214092 , uj:21235 , Citation: Ayeleru, O.0., Ntuli, F & Mbohwa, C. 2016. Municipal solid waste composition determination in the city of Johannesburg.
- Description: Abstract: This paper aims at determining the composition of various waste components at Robinson Deep landfill site (LS). The waste composition study was conducted during the summer in 2015 at Robinson LS to evaluate the various component of wastes received at the site. This was done in order to determine the amount of organic wastes that are generated daily as a basis for waste to energy (WtE) proposition in the City of Johannesburg (CoJ). The methodology used was in accordance with two international standards. Hands sorting were utilized and the samples were classified into nine broad categories. The categories include; paper, organics, plastics, metals, glasses, textiles, construction and demolition (C &D), special care and other wastes...
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- Authors: Ayeleru, Olusola Olaitan , Ntuli, Freeman , Mbohwa, Charles
- Date: 2016
- Subjects: City of Johannesburg , Municipal solid waste , Robinson deep
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/214092 , uj:21235 , Citation: Ayeleru, O.0., Ntuli, F & Mbohwa, C. 2016. Municipal solid waste composition determination in the city of Johannesburg.
- Description: Abstract: This paper aims at determining the composition of various waste components at Robinson Deep landfill site (LS). The waste composition study was conducted during the summer in 2015 at Robinson LS to evaluate the various component of wastes received at the site. This was done in order to determine the amount of organic wastes that are generated daily as a basis for waste to energy (WtE) proposition in the City of Johannesburg (CoJ). The methodology used was in accordance with two international standards. Hands sorting were utilized and the samples were classified into nine broad categories. The categories include; paper, organics, plastics, metals, glasses, textiles, construction and demolition (C &D), special care and other wastes...
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Characterization, management and utilization of landfill municipal solid waste : a case study of Soweto
- Authors: Ayeleru, Olusola Olaitan
- Date: 2016
- Subjects: Integrated solid waste management , Sanitary landfills - South Africa - Soweto , Waste disposal in the ground - South Africa - Soweto , Refuse and refuse disposal - South Africa - Soweto
- Language: English
- Type: Masters (Thesis)
- Identifier: http://hdl.handle.net/10210/233021 , uj:23781
- Description: M.Tech. , Abstract: The management of solid waste (SW) has become a crucial issue confronting low and middle income countries. This problem emanates from the generation of SW which is currently on a large scale as cities expand. The aims of this study were to determine the composition of the various waste components disposed of to the Marie Louise landfill site (LS), evaluates the elemental composition and proximate analysis of the organic fraction of municipal solid waste (OFMSW), conducts an economic analysis of setting up a recycling facility and to finally evaluating the perception of the general public with regards to the current waste management (WM) services in the City of Johannesburg (CoJ). The objectives of this study were to determine the various waste components disposed of to the LS as a baseline to propose complete diversion of wastes from going to the LS; to determine the suitability of food waste (FW) generated as a potential source of compost and biogas generation; to carry out an economic evaluation of setting up a recycling facility as a source of revenue to the municipality and potential source of jobs opportunities for the youths in the municipality and finally to assess the level of awareness of the people towards municipal solid waste management (MSWM). The waste composition studies were conducted during the summer in 2015 and during the winter in 2016 at the LS. The results of the analysis were classified into two groups based on two of the services offered by Pikitup (PU) (the municipality) (Dailies non compacted and Round collected refuse (RCR) compacted wastes collection services). STATA 12 software was used to determine seasonal variation on the main components of the wastes generated between the summer and the winter exercises for both services. The results obtained showed that p-values were too extreme (when the null hypothesis is true, the p-value is the probability of obtaining a result equal to or “more extreme” than what was actually observed. The p-values obtained for both the Dailies and for the RCR were (p-value = 0.9775) and (p-value = 0.9760) respectively. Analysis of variance (ANOVA) was also used to evaluate seasonal variation in both seasons on both services for the sub-division of the waste streams. Results obtained showed (p-value = 0.9999) for Dailies and (p-value = 0.9913) for RCR. These results show that the differences between the winter and summer for both services were not statistically significant. The elemental composition and proximate analysis of the FW was also evaluated. The analysis gave a C/N of 22.66 and an empirical formula of C27H44NO16. An engineering economic evaluation was conducted to determine the financial feasibility of this project. From the analysis, IRR on investment was found to be 41%, IRR on equity was found to be 80%,..
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- Authors: Ayeleru, Olusola Olaitan
- Date: 2016
- Subjects: Integrated solid waste management , Sanitary landfills - South Africa - Soweto , Waste disposal in the ground - South Africa - Soweto , Refuse and refuse disposal - South Africa - Soweto
- Language: English
- Type: Masters (Thesis)
- Identifier: http://hdl.handle.net/10210/233021 , uj:23781
- Description: M.Tech. , Abstract: The management of solid waste (SW) has become a crucial issue confronting low and middle income countries. This problem emanates from the generation of SW which is currently on a large scale as cities expand. The aims of this study were to determine the composition of the various waste components disposed of to the Marie Louise landfill site (LS), evaluates the elemental composition and proximate analysis of the organic fraction of municipal solid waste (OFMSW), conducts an economic analysis of setting up a recycling facility and to finally evaluating the perception of the general public with regards to the current waste management (WM) services in the City of Johannesburg (CoJ). The objectives of this study were to determine the various waste components disposed of to the LS as a baseline to propose complete diversion of wastes from going to the LS; to determine the suitability of food waste (FW) generated as a potential source of compost and biogas generation; to carry out an economic evaluation of setting up a recycling facility as a source of revenue to the municipality and potential source of jobs opportunities for the youths in the municipality and finally to assess the level of awareness of the people towards municipal solid waste management (MSWM). The waste composition studies were conducted during the summer in 2015 and during the winter in 2016 at the LS. The results of the analysis were classified into two groups based on two of the services offered by Pikitup (PU) (the municipality) (Dailies non compacted and Round collected refuse (RCR) compacted wastes collection services). STATA 12 software was used to determine seasonal variation on the main components of the wastes generated between the summer and the winter exercises for both services. The results obtained showed that p-values were too extreme (when the null hypothesis is true, the p-value is the probability of obtaining a result equal to or “more extreme” than what was actually observed. The p-values obtained for both the Dailies and for the RCR were (p-value = 0.9775) and (p-value = 0.9760) respectively. Analysis of variance (ANOVA) was also used to evaluate seasonal variation in both seasons on both services for the sub-division of the waste streams. Results obtained showed (p-value = 0.9999) for Dailies and (p-value = 0.9913) for RCR. These results show that the differences between the winter and summer for both services were not statistically significant. The elemental composition and proximate analysis of the FW was also evaluated. The analysis gave a C/N of 22.66 and an empirical formula of C27H44NO16. An engineering economic evaluation was conducted to determine the financial feasibility of this project. From the analysis, IRR on investment was found to be 41%, IRR on equity was found to be 80%,..
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Characterisation of fruits and vegetables wastes in the city of Johannesburg
- Ayeleru, Olusola Olaitan, Ntuli, Freeman, Mbohwa, Charles
- Authors: Ayeleru, Olusola Olaitan , Ntuli, Freeman , Mbohwa, Charles
- Date: 2016
- Subjects: Fruits , Johannesburg market , Vegetables
- Language: English
- Type: Conference proceedings
- Identifier: http://ujcontent.uj.ac.za8080/10210/388885 , http://hdl.handle.net/10210/214113 , uj:21237 , Citation: Ayeleru, O.O., Ntuli, F & Mbohwa, C. 2016. Characterisation of fruits and vegetables wastes in the city of Johannesburg.
- Description: Abstract: Municipal solid waste (MSW) composition study is very important as a baseline to utilizing fresh fruit and vegetables (FFVs) wastes in waste to energy (WtE) project. The aim of this paper is to determine the composition of various waste components at the Johannesburg FFVs market. The study was conducted during the summer in 2015 to evaluate the various components of fruit and vegetable wastes (FVWs) generated at the market. This was done in order to evaluate the amount of FVWs that are generated daily at the market as a starting point for waste to energy (WtE) proposition for the City of Johannesburg (CoJ). Two international standards: ASTM D5231-92 - 2008 (American Standard Test Method) and UNEP/IETC -2009 (United Nations Environment Programme/International Environmental Technology Centre) were used as yardsticks for the procedure used. Samples were classified based on their colours; green (vegetables and fruits), blue/purple (vegetables and fruits), tan/brown (vegetables and fruits), yellow/orange (vegetables and fruits), red (vegetables and fruits) and other wastes which include corrugated boxes, metals, woods, plastic crates and other composite wastes. Samples were further classified into 135 classes in which some were not available due to seasonal variation and the samples were manually sorted by hands. From the results of the analysis, fruits constituted 55%, vegetables 38%, corrugated boxes and cartons 3%, metals, plastics, woods and other wastes all constituted 1% each.
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- Authors: Ayeleru, Olusola Olaitan , Ntuli, Freeman , Mbohwa, Charles
- Date: 2016
- Subjects: Fruits , Johannesburg market , Vegetables
- Language: English
- Type: Conference proceedings
- Identifier: http://ujcontent.uj.ac.za8080/10210/388885 , http://hdl.handle.net/10210/214113 , uj:21237 , Citation: Ayeleru, O.O., Ntuli, F & Mbohwa, C. 2016. Characterisation of fruits and vegetables wastes in the city of Johannesburg.
- Description: Abstract: Municipal solid waste (MSW) composition study is very important as a baseline to utilizing fresh fruit and vegetables (FFVs) wastes in waste to energy (WtE) project. The aim of this paper is to determine the composition of various waste components at the Johannesburg FFVs market. The study was conducted during the summer in 2015 to evaluate the various components of fruit and vegetable wastes (FVWs) generated at the market. This was done in order to evaluate the amount of FVWs that are generated daily at the market as a starting point for waste to energy (WtE) proposition for the City of Johannesburg (CoJ). Two international standards: ASTM D5231-92 - 2008 (American Standard Test Method) and UNEP/IETC -2009 (United Nations Environment Programme/International Environmental Technology Centre) were used as yardsticks for the procedure used. Samples were classified based on their colours; green (vegetables and fruits), blue/purple (vegetables and fruits), tan/brown (vegetables and fruits), yellow/orange (vegetables and fruits), red (vegetables and fruits) and other wastes which include corrugated boxes, metals, woods, plastic crates and other composite wastes. Samples were further classified into 135 classes in which some were not available due to seasonal variation and the samples were manually sorted by hands. From the results of the analysis, fruits constituted 55%, vegetables 38%, corrugated boxes and cartons 3%, metals, plastics, woods and other wastes all constituted 1% each.
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Optical properties of bimetallic (SrO-K2O) nanofillers
- Ayeleru, Olusola Olaitan, Dlova, Sisanda, Ntuli, Freeman, Kupolati, Williams Kehinde, Olubambi, Peter Apata
- Authors: Ayeleru, Olusola Olaitan , Dlova, Sisanda , Ntuli, Freeman , Kupolati, Williams Kehinde , Olubambi, Peter Apata
- Date: 2019
- Subjects: Bimetallic, nanofillers, K2O
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/396163 , uj:32881 , 2351-9789 (online) , Citation : Ayelerua, O.O. et al. 2019. Optical properties of bimetallic (SrO-K2O) nanofillers , https://creativecommons.org/licenses/by-nc-nd/4.0/
- Description: Abstract : In this study, bimetallic nanofiller capable of usage as reinforcement was synthesized from expanded polystyrene (EPS). Bimetallic materials consist of two different metals. The bimetallic nanofiller consisting of SrO and K2O was successfully developed by the hydrothermal method which many researchers have well utilized to prepare nanoparticles in recent times. This study aims to synthesize and characterize bimetallic SrO-K2O, nanofillers from recycled expanded polystyrene (EPS). Products obtained were characterized by Zeta potential and Raman spectra. The Zeta potential was used to determine the surface charge of the nanofillers in solution. The Raman spectroscopy was used to determine the crystalline structure of the nanofillers. Based on the results, it was concluded that stability of nanoparticle materials in acidic medium decreases as the pH increases, and for the basic medium, stability reduces with decrease pH. The mixture of SrO and K2O to form SrO-K2O bimetallic oxide affects the stability of the nanofillers produced both in the acidic and basic medium. The Raman spectra indicated the Dband and Gband of the synthesized SrO, K2O and bimetallic SrO-K2O at 1006, 1008 and 1004 cm-1 and 1598, 1610 and 1606 cm-1 respectively. It was concluded that the shift in band gaps were because of structural changes in the molecules of the recycled expanded polystyrene.
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- Authors: Ayeleru, Olusola Olaitan , Dlova, Sisanda , Ntuli, Freeman , Kupolati, Williams Kehinde , Olubambi, Peter Apata
- Date: 2019
- Subjects: Bimetallic, nanofillers, K2O
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/396163 , uj:32881 , 2351-9789 (online) , Citation : Ayelerua, O.O. et al. 2019. Optical properties of bimetallic (SrO-K2O) nanofillers , https://creativecommons.org/licenses/by-nc-nd/4.0/
- Description: Abstract : In this study, bimetallic nanofiller capable of usage as reinforcement was synthesized from expanded polystyrene (EPS). Bimetallic materials consist of two different metals. The bimetallic nanofiller consisting of SrO and K2O was successfully developed by the hydrothermal method which many researchers have well utilized to prepare nanoparticles in recent times. This study aims to synthesize and characterize bimetallic SrO-K2O, nanofillers from recycled expanded polystyrene (EPS). Products obtained were characterized by Zeta potential and Raman spectra. The Zeta potential was used to determine the surface charge of the nanofillers in solution. The Raman spectroscopy was used to determine the crystalline structure of the nanofillers. Based on the results, it was concluded that stability of nanoparticle materials in acidic medium decreases as the pH increases, and for the basic medium, stability reduces with decrease pH. The mixture of SrO and K2O to form SrO-K2O bimetallic oxide affects the stability of the nanofillers produced both in the acidic and basic medium. The Raman spectra indicated the Dband and Gband of the synthesized SrO, K2O and bimetallic SrO-K2O at 1006, 1008 and 1004 cm-1 and 1598, 1610 and 1606 cm-1 respectively. It was concluded that the shift in band gaps were because of structural changes in the molecules of the recycled expanded polystyrene.
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Synthesis and characterization of Sno2 nanofiller from recycled expanded polystyrene
- Ayeleru, Olusola Olaitan, Dlova, Sisanda, Ntuli, Freeman, Kupolati, Williams Kehinde, Olubambi, Peter Apata
- Authors: Ayeleru, Olusola Olaitan , Dlova, Sisanda , Ntuli, Freeman , Kupolati, Williams Kehinde , Olubambi, Peter Apata
- Date: 2019
- Subjects: Environment, Nanofillers, Polymer wastes
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/395311 , uj:32772 , 2351-9789 (online) , https://doi.org/10.1016/j.promfg.2019.02.089
- Description: Abstract : Under the concept of "Industry 4.0", production processes will be pushed to be increasingly interconnected, information based on a real time basis and, necessarily, much more efficient. In this context, capacity optimization goes beyond the traditional aim of capacity maximization, contributing also for organization’s profitability and value. Indeed, lean management and continuous improvement approaches suggest capacity optimization instead of maximization. The study of capacity optimization and costing models is an important research topic that deserves contributions from both the practical and theoretical perspectives. This paper presents and discusses a mathematical model for capacity management based on different costing models (ABC and TDABC). A generic model has been developed and it was used to analyze idle capacity and to design strategies towards the maximization of organization’s value. The trade-off capacity maximization vs operational efficiency is highlighted
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- Authors: Ayeleru, Olusola Olaitan , Dlova, Sisanda , Ntuli, Freeman , Kupolati, Williams Kehinde , Olubambi, Peter Apata
- Date: 2019
- Subjects: Environment, Nanofillers, Polymer wastes
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/395311 , uj:32772 , 2351-9789 (online) , https://doi.org/10.1016/j.promfg.2019.02.089
- Description: Abstract : Under the concept of "Industry 4.0", production processes will be pushed to be increasingly interconnected, information based on a real time basis and, necessarily, much more efficient. In this context, capacity optimization goes beyond the traditional aim of capacity maximization, contributing also for organization’s profitability and value. Indeed, lean management and continuous improvement approaches suggest capacity optimization instead of maximization. The study of capacity optimization and costing models is an important research topic that deserves contributions from both the practical and theoretical perspectives. This paper presents and discusses a mathematical model for capacity management based on different costing models (ABC and TDABC). A generic model has been developed and it was used to analyze idle capacity and to design strategies towards the maximization of organization’s value. The trade-off capacity maximization vs operational efficiency is highlighted
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Development and size distribution of polystyrene/ZnO nanofillers
- Ayeleru, Olusola Olaitan, Dlova, Sisanda, Ntuli, Freeman, Kupolati, Williams Kehinde, Olubambi, Peter Apata
- Authors: Ayeleru, Olusola Olaitan , Dlova, Sisanda , Ntuli, Freeman , Kupolati, Williams Kehinde , Olubambi, Peter Apata
- Date: 2019
- Subjects: Fourier transform infrared spectroscopy, Nanofillers, Particle size analysis
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/395844 , uj:32841 , 2351-9789 (Online) , Citation : Ayelerua, O.O. et al. 2019. Development and size distribution of polystyrene/ZnO nanofillers , https://creativecommons.org/licenses/by-nc-nd/4.0/
- Description: Abstract : In this paper, the preparation and characterization of ZnO nanofillers from polystyrene (PS) polymer waste for use as reinforcement was presented. This was done to achieve a better means of upcycling polymer wastes that have become social menace in recent times. The PS/ZnO nanofillers was synthesized through the hydrothermal synthesis of nanocomposites in an enclosed reactor. The reactor was kept in an oven at a specified temperature for a period. A product obtained was characterized using Fourier transform infrared (FTIR) analysis and Particle size analyser (PSA). The FTIR was utilized to determine the functional groups present in the synthesized nanofillers. The Particle size analyser was used to determine the distribution of particle size within the polymer matrix. The absorption peak obtained in the FTIR analysis confirmed the presence of ZnO in the synthesized material and the results from particle size analysis showed that about 80% of the particle was accommodated within the whole sample.
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- Authors: Ayeleru, Olusola Olaitan , Dlova, Sisanda , Ntuli, Freeman , Kupolati, Williams Kehinde , Olubambi, Peter Apata
- Date: 2019
- Subjects: Fourier transform infrared spectroscopy, Nanofillers, Particle size analysis
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/395844 , uj:32841 , 2351-9789 (Online) , Citation : Ayelerua, O.O. et al. 2019. Development and size distribution of polystyrene/ZnO nanofillers , https://creativecommons.org/licenses/by-nc-nd/4.0/
- Description: Abstract : In this paper, the preparation and characterization of ZnO nanofillers from polystyrene (PS) polymer waste for use as reinforcement was presented. This was done to achieve a better means of upcycling polymer wastes that have become social menace in recent times. The PS/ZnO nanofillers was synthesized through the hydrothermal synthesis of nanocomposites in an enclosed reactor. The reactor was kept in an oven at a specified temperature for a period. A product obtained was characterized using Fourier transform infrared (FTIR) analysis and Particle size analyser (PSA). The FTIR was utilized to determine the functional groups present in the synthesized nanofillers. The Particle size analyser was used to determine the distribution of particle size within the polymer matrix. The absorption peak obtained in the FTIR analysis confirmed the presence of ZnO in the synthesized material and the results from particle size analysis showed that about 80% of the particle was accommodated within the whole sample.
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Utilization of organic fraction of municipal solid waste (OFMSW) as compost: a case study of Florida, South Africa
- Ayeleru, Olusola Olaitan, Ntuli, Freeman, Mbohwa, Charles
- Authors: Ayeleru, Olusola Olaitan , Ntuli, Freeman , Mbohwa, Charles
- Date: 2016
- Subjects: Florida , Composting , Municipal solid waste
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/214079 , uj:21234 , Citation: Ayeleru, O.O., Ntuli, F & Mbohwa, C. 2016. Utilization of organic fraction of municipal solid waste (OFMSW) as compost: a case study of Florida, South Africa.
- Description: Abstract: Composting of municipal solid waste is one of the means of diverting organic waste from the waste streams thus eliminating the use of landfills. This process will ensure availability of cheaper materials which can enhance soil fertility thus leading to reduction of pollution and increasing life span of the landfill site. Availability of reliable data on waste composition and characterization studies will be invaluable to policy makers for formulation of policy on proper waste management. Also, quantification and characterization of municipal solid waste (MSW) are vital tools for decision making for adequate planning on sustainable solid waste management (SSWM)...
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- Authors: Ayeleru, Olusola Olaitan , Ntuli, Freeman , Mbohwa, Charles
- Date: 2016
- Subjects: Florida , Composting , Municipal solid waste
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/214079 , uj:21234 , Citation: Ayeleru, O.O., Ntuli, F & Mbohwa, C. 2016. Utilization of organic fraction of municipal solid waste (OFMSW) as compost: a case study of Florida, South Africa.
- Description: Abstract: Composting of municipal solid waste is one of the means of diverting organic waste from the waste streams thus eliminating the use of landfills. This process will ensure availability of cheaper materials which can enhance soil fertility thus leading to reduction of pollution and increasing life span of the landfill site. Availability of reliable data on waste composition and characterization studies will be invaluable to policy makers for formulation of policy on proper waste management. Also, quantification and characterization of municipal solid waste (MSW) are vital tools for decision making for adequate planning on sustainable solid waste management (SSWM)...
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Development of value-added materials from municipal plastic solid waste
- Authors: Ayeleru, Olusola Olaitan
- Date: 2020
- Language: English
- Type: Doctoral (Thesis)
- Identifier: http://hdl.handle.net/10210/443771 , uj:38760
- Description: Abstract: Continuous consumption of plastic materials that brings about rapid and more plastic wastes (PWs) generation has become an issue of concern globally, specifically in low-income countries (LCs) where waste management services are still at an infant stage and are inadequate and unstainable. The explosion and acute generation of PWs are dependent on many factors including, incessant migration of citizens in search of greener pastures from rural areas to cities and continuous influx of economic migrants from surrounding African nations and other nations of the world to sub Sahara Africa (SSA) region, changes in consumption pattern, rapid economic and industrial growth etc. The most startling thing about the severe plastic waste (PW) generation is that many citizens are not even aware of the negative/damaging impact of their activities on public health and the natural environment. Besides, the management of PW is now a challenge owing to factors like; insufficient budget for waste management (WM), unavailability of land spaces in cities for the construction of new disposal facilities, bad legislation and policies; and poor education and awareness campaigns. Hence, this study aims to enlighten the populace on the need for a change of attitude and behaviour towards municipal plastic solid waste management and to support recycling for greener cities and a sustainable future. To achieve this, a cross section of the students of the University of Johannesburg, South Africa were interviewed via a structured questionnaire survey and a logistic prediction model was developed to evaluate the attitudes and behaviours of the students towards recycling. Moreover, polystyrene plastic wastes (PSPWs) were recycled via solvothermal technique (chemical recycling) where a hybrid organic-inorganic nanocomposite (a value-added material) was developed. The synthesised nanocomposites (NCs) were characterized by XPS and EDX; XRD, FTIR, SEM, TEM and DLS; TGA, DSC and BET. Moreover, the neat (control) and unprocessed recycled polystyrene (rPS) were also characterized by NMR and GPC. , Ph.D. (Chemical Engineering)
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- Authors: Ayeleru, Olusola Olaitan
- Date: 2020
- Language: English
- Type: Doctoral (Thesis)
- Identifier: http://hdl.handle.net/10210/443771 , uj:38760
- Description: Abstract: Continuous consumption of plastic materials that brings about rapid and more plastic wastes (PWs) generation has become an issue of concern globally, specifically in low-income countries (LCs) where waste management services are still at an infant stage and are inadequate and unstainable. The explosion and acute generation of PWs are dependent on many factors including, incessant migration of citizens in search of greener pastures from rural areas to cities and continuous influx of economic migrants from surrounding African nations and other nations of the world to sub Sahara Africa (SSA) region, changes in consumption pattern, rapid economic and industrial growth etc. The most startling thing about the severe plastic waste (PW) generation is that many citizens are not even aware of the negative/damaging impact of their activities on public health and the natural environment. Besides, the management of PW is now a challenge owing to factors like; insufficient budget for waste management (WM), unavailability of land spaces in cities for the construction of new disposal facilities, bad legislation and policies; and poor education and awareness campaigns. Hence, this study aims to enlighten the populace on the need for a change of attitude and behaviour towards municipal plastic solid waste management and to support recycling for greener cities and a sustainable future. To achieve this, a cross section of the students of the University of Johannesburg, South Africa were interviewed via a structured questionnaire survey and a logistic prediction model was developed to evaluate the attitudes and behaviours of the students towards recycling. Moreover, polystyrene plastic wastes (PSPWs) were recycled via solvothermal technique (chemical recycling) where a hybrid organic-inorganic nanocomposite (a value-added material) was developed. The synthesised nanocomposites (NCs) were characterized by XPS and EDX; XRD, FTIR, SEM, TEM and DLS; TGA, DSC and BET. Moreover, the neat (control) and unprocessed recycled polystyrene (rPS) were also characterized by NMR and GPC. , Ph.D. (Chemical Engineering)
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