Oranso T. Mahlangu
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View article: Solar photo-Fenton coupled with kaolin-fly ash ceramic membrane system for removal of natural organic matter fractions in lake water
Solar photo-Fenton coupled with kaolin-fly ash ceramic membrane system for removal of natural organic matter fractions in lake water Open
View article: Analysis, occurrence and removal of polychlorinated biphenyls (PCBs) in mine water – A review
Analysis, occurrence and removal of polychlorinated biphenyls (PCBs) in mine water – A review Open
Background Polychlorinated biphenyls (PCBs) are persistent organic pollutants, and as such, they are subject to prohibition under the Stockholm Convention, due to their environmental and health effects. Despite their historical utilisation…
View article: Post-treatment effects on polyethyleneimine/poly(sodium styrene sulfonate)-silver modified ultrafiltration membranes for slaughterhouse wastewater reuse
Post-treatment effects on polyethyleneimine/poly(sodium styrene sulfonate)-silver modified ultrafiltration membranes for slaughterhouse wastewater reuse Open
View article: Influence of Membrane Salt Rejection Properties on Cake-Enhanced Concentration Polarization Effects During Colloidal Fouling of Nanofiltration Membranes
Influence of Membrane Salt Rejection Properties on Cake-Enhanced Concentration Polarization Effects During Colloidal Fouling of Nanofiltration Membranes Open
The build-up of a fouling layer on the membrane surface is believed to deteriorate flux and salt rejection by hindering back-diffusion of rejected salts, a phenomenon called cake-enhanced concentration polarization (CECP). Nevertheless, CE…
View article: Toward the Development and Optimization of a Solar Photo-Fenton Degradation Method for Natural Organic Matter Removal in Selected South African Drinking Water Treatment Plants
Toward the Development and Optimization of a Solar Photo-Fenton Degradation Method for Natural Organic Matter Removal in Selected South African Drinking Water Treatment Plants Open
Natural organic matter (NOM) is one of the major pollutants of concern in drinking water. In this study, the photo-Fenton process was applied for enhanced removal of NOM in drinking water samples collected from four drinking water treatmen…
View article: Unseen threats in aquatic and terrestrial ecosystems: Nanoparticle persistence, transport and toxicity in natural environments
Unseen threats in aquatic and terrestrial ecosystems: Nanoparticle persistence, transport and toxicity in natural environments Open
Although nanoparticles (NPs) are increasingly used in various industries, their uncontrolled environmental release presents a potential risk to water bodies, vegetation and human health. Although previous review studies evaluated the toxic…
View article: Removal of selected pharmaceuticals by sulfur-doped graphitic carbon nitride-polysulfone (PSf-S-g-C3N4) membranes: Mechanisms and antifouling properties
Removal of selected pharmaceuticals by sulfur-doped graphitic carbon nitride-polysulfone (PSf-S-g-C3N4) membranes: Mechanisms and antifouling properties Open
This work probed the potential application of polysulfone (PSf) membranes incorporated with sulfur-doped graphitic carbon nitride (S-g-C3N4) nanosheets for the removal of five pharmaceuticals recently detected in major water sources in Sou…
View article: Influence of polyethersulfone polymer–metal oxide nanoparticle affinity interactions in preventing nanoparticle leaching during membrane cleaning with harsh chemical agents
Influence of polyethersulfone polymer–metal oxide nanoparticle affinity interactions in preventing nanoparticle leaching during membrane cleaning with harsh chemical agents Open
View article: Removal of Natural Organic Matter Fractions by Kaolin/Fly Ash Ceramic Microfiltration Membrane in Drinking Water: Insights from a Laboratory Scale Application
Removal of Natural Organic Matter Fractions by Kaolin/Fly Ash Ceramic Microfiltration Membrane in Drinking Water: Insights from a Laboratory Scale Application Open
The high cost of precursor materials has hindered commercialization of ceramic membranes (CM). In this work, a microfiltration ceramic disc (≈50 mm in diameter and 4 mm thick) is prepared from low‐cost materials, kaolin, and fly ash (≈67 a…
View article: Hierarchical Approach to the Management of Drinking Water Sludge Generated from Alum-Based Treatment Processes
Hierarchical Approach to the Management of Drinking Water Sludge Generated from Alum-Based Treatment Processes Open
The management of drinking water treatment plant (DWTP) sludge is challenging for water treatment facilities. Previous studies reported mainly on handling sludge through landfilling, release into water bodies, discharge into wastewater tre…
View article: Biofouling control of thermophilic bacteria in membrane distillation
Biofouling control of thermophilic bacteria in membrane distillation Open
Previously, fouling of MD membranes was perceived to be minimal due to the operational conditions preventing bacterial growth. However, recent studies presented fouling of MD membranes, largely due to various halophilic and thermophilic ba…
View article: The impact of nanoparticle leach on sustainable performance of the membranes – A critical review
The impact of nanoparticle leach on sustainable performance of the membranes – A critical review Open
Fouling remains a major challenge in membrane-based water treatment technologies. As a result, contemporary research is geared towards membrane surface modification techniques to reduce fouling. Mitigation strategies involving incorporatio…
View article: Graphene Oxide Enhanced Monoethanolamine and Ethylenediamine Nanofluids for Efficient Carbon Dioxide Uptake from Flue Gas
Graphene Oxide Enhanced Monoethanolamine and Ethylenediamine Nanofluids for Efficient Carbon Dioxide Uptake from Flue Gas Open
The addition of nanoparticles in amine solutions to produce a stable amine-based nanofluid provides a high surface area for absorption and improves the absorption rate. In this work, nanofluids were prepared by dispersing graphene oxide (G…
View article: Progress in membrane distillation processes for dye wastewater treatment: A review
Progress in membrane distillation processes for dye wastewater treatment: A review Open
Textile and cosmetic industries generate large amounts of dye effluents requiring treatment before discharge. This wastewater contains high levels of reactive dyes, low to none-biodegradable materials and chemical residues. Technically, dy…
View article: Strategies for mitigating challenges associated with trace organic compound removal by high-retention membrane bioreactors (HR-MBRs)
Strategies for mitigating challenges associated with trace organic compound removal by high-retention membrane bioreactors (HR-MBRs) Open
Due to the limitations of conventional ultrafiltration/microfiltration-based membrane bioreactors (UF/MF-MBRs) in removing trace organic compounds (TrOCs), the concept of high-retention membrane bioreactors (HR-MBRs) was introduced. Despit…
View article: Remediation of a non-steroidal anti-inflammatory drug from aqueous solutions using cobalt ferrite-photocatalytic membranes
Remediation of a non-steroidal anti-inflammatory drug from aqueous solutions using cobalt ferrite-photocatalytic membranes Open
CoFe2O4-PES photocatalytic membranes were assessed for Naproxen degradation in water. The degradation obeyed first-order reaction kinetics (Kapp: 1.25 × 10−3 min−1 - 3.90 × 10−3 min−1). Surface roughness altered the collision dynamics of r…
View article: Leveraging calcium-NOM complexation phenomenon as RO fouling mitigation strategy during treatment of lake water
Leveraging calcium-NOM complexation phenomenon as RO fouling mitigation strategy during treatment of lake water Open
Organic fouling during reverse osmosis (RO) is exacerbated by the presence of calcium up to a limit where extremely high calcium concentration results in lesser fouling due to formation of large organic-calcium aggregates with lower cake r…
View article: Enhancing Dye Rejection and Antifouling Resistance of Thin Film Nanocomposite Nanofiltration Membranes Through the Incorporation of Bmep Grafted Graphene Oxide
Enhancing Dye Rejection and Antifouling Resistance of Thin Film Nanocomposite Nanofiltration Membranes Through the Incorporation of Bmep Grafted Graphene Oxide Open
View article: Role of Membrane–Solute Affinity Interactions in Carbamazepine Rejection and Resistance to Organic Fouling by Nano-Engineered UF/PES Membranes
Role of Membrane–Solute Affinity Interactions in Carbamazepine Rejection and Resistance to Organic Fouling by Nano-Engineered UF/PES Membranes Open
In this study, polyethersulfone (PES) ultrafiltration (UF) membranes were modified with GO, Ag, ZnO, Ag-GO and ZnO-GO nanoparticles to improve carbamazepine removal and fouling prevention by making membrane surfaces more hydrophilic. The f…
View article: Carbon nanotubes and silver nanoparticles modification of PVDF membranes for improved seawater desalination in direct contact membrane distillation
Carbon nanotubes and silver nanoparticles modification of PVDF membranes for improved seawater desalination in direct contact membrane distillation Open
Membrane distillation (MD) has emerged as a novel technology capable of recovering fresh water from brackish, saline, and wastewater. However, its industrial application is limited to various challenges including membrane properties. In th…
View article: Nanoparticle-Enhanced PVDF Flat-Sheet Membranes for Seawater Desalination in Direct Contact Membrane Distillation
Nanoparticle-Enhanced PVDF Flat-Sheet Membranes for Seawater Desalination in Direct Contact Membrane Distillation Open
In this study, hydrophobic functionalized carbon nanotubes (fCNTs) and silica nanoparticles (fSiO2NPs) were incorporated into polyvinylidene fluoride (PVDF) flat-sheet membranes to improve their performance in membrane distillation (MD). T…
View article: Treatment of Trace Organics and Emerging Contaminants Using Traditional and Advanced Technologies
Treatment of Trace Organics and Emerging Contaminants Using Traditional and Advanced Technologies Open
In recent years, trace organic compounds (TOrCs) and emerging contaminants (ECs) have been detected in different water sources including surface water and wastewater. Such compounds include but not limited to pharmaceuticals, hormones, per…
View article: Silica nanoparticle modified polysulfone/polypropylene membrane for separation of oil-water emulsions
Silica nanoparticle modified polysulfone/polypropylene membrane for separation of oil-water emulsions Open
Oil spillage and industrial discharge of oily wastewater threaten the health of the human beings and the environmental life. To perform oil cleaning from the water bodies, several physicochemical methods have been employed. However, these …
View article: In Situ Generation of Fouling Resistant Ag/Pd Modified PES Membranes for Treatment of Pharmaceutical Wastewater
In Situ Generation of Fouling Resistant Ag/Pd Modified PES Membranes for Treatment of Pharmaceutical Wastewater Open
In this study, Ag and Pd bimetallic nanoparticles were generated in situ in polyethersulfone (PES) dope solutions, and membranes were fabricated through a phase inversion method. The membranes were characterized for various physical and ch…
View article: Interdependence of Kinetics and Fluid Dynamics in the Design of Photocatalytic Membrane Reactors
Interdependence of Kinetics and Fluid Dynamics in the Design of Photocatalytic Membrane Reactors Open
Photocatalytic membrane reactors (PMRs) are a promising technology for wastewater reclamation. The principles of PMRs are based on photocatalytic degradation and membrane rejection, the different processes occurring simultaneously. Coupled…
View article: Optimization of Hemp Bast Microfiber Production Using Response Surface Modelling
Optimization of Hemp Bast Microfiber Production Using Response Surface Modelling Open
Non-wood biomass is particularly attractive as a cellulose source because of the lower lignin content. However, optimal cellulose extraction conditions are required as lignin content varies between plant sources. Further, the use of organi…
View article: Green chemistry approaches for extraction of cellulose nanofibers (CNFs): A comparison of mineral and organic acids
Green chemistry approaches for extraction of cellulose nanofibers (CNFs): A comparison of mineral and organic acids Open
This study reports for the first time an environmentally friendly process to prepare cellulose nanofibrils (CNFs) from industrial Hemp (Cannabis sativa L.) bast fibers by acid hydrolysis treatment combined with ultrasonication. Hemp bast f…
View article: Leaching of CuO Nanoparticles from PES Ultrafiltration Membranes
Leaching of CuO Nanoparticles from PES Ultrafiltration Membranes Open
Recent studies have incorporated nanoparticles such as CuO, ZnO, and TiO2 to improve membrane physical and filtration properties. However, one of the major concerns about membrane modification with nanoparticles is the possible …
View article: Interdependence of Contributing Factors Governing Dead-End Fouling of Nanofiltration Membranes
Interdependence of Contributing Factors Governing Dead-End Fouling of Nanofiltration Membranes Open
Cake-enhanced concentration polarization (CECP) has been ascribed as the main cause of flux decline in dead-end filtration. An unfamiliar approach was used to investigate the role of CECP effects in the fouling of a nanofiltration membrane…
View article: Fouling of nanofiltration membranes : mechanisms and implications for trace organic rejection
Fouling of nanofiltration membranes : mechanisms and implications for trace organic rejection Open
The use of pressure driven membrane processes (such as nanofiltration (NF) and reverse osmosis (RO)) has increased in recent years. NF/RO processes are mainly applied in production of drinking water from contaminated water sources such as …