ResearchSpace
→
Research Publications/Outputs
→
Conference Publications
→
Browsing Conference Publications by Author

Browsing Conference Publications by Author "Thwala, Melusi"

Now showing items 1-15 of 15

An analysis of engineered nanomaterial characteristics reported in aquatic nanotoxicity studies: 2004-2013

Author: Thwala, Melusi ; Mahaye, N ; Schaefer, Lisa M ; Musee, N Date: Apr 2014 In this study, we employed bibliometric techniques to analyse engineered nanomaterials (ENMs) characterization data published in peer-reviewed aquatic nanoecotoxicity hosted in the International Council on Nanotechnology (ICON) and Web of ... Read more
Bulk scale industrial effluent reuse potential in South Africa Atlas

Author: Steyn, Maronel ; Walters, Chavon R ; Mathye, Salamina M ; Thwala, Melusi ; Ndlela, Luyanda L ; Tancu, Yolanda ; Lehutso, Raisibe F ; Banoo, Ismail Date: Oct 2021 Globally, responsible and efficient water management is fast becoming a pressing reality for domestic users, agriculture and industry alike. The challenge is therefore to capitalise on the limited water we currently have. Solution: Bulk-scale ... Read more
The emerging case of nanopollutants in the aquatic environment: analytical challenges for the exposure assessment of silver and zinc oxide nanoparticles

Author: Thwala, Melusi ; Tancu, Yolanda Date: Sep 2016 The growing number of nano-enabled products and technologies suggests likelihood increase of nanopollutants into the environment, a trend that is anticipated to increase further as nanotechnology expands. Nanopollutants are considered a case ... Read more
Evidence of free radical and antioxidant activity in Spirodela exposed to metallic and metal oxide nanoparticles: potential for protein and lipid damage

Author: Thwala, Melusi ; Musee, N ; Wepener, V ; Nota, N Date: Apr 2012 The toxicity of engineered nanoparticles towards macro algae and higher aquatic plants has not been well studied. This knowledge gap challenges the development of nano risk assessment towards water ecosystems. In this study, we investigated ... Read more
Exposure assessment of metal-based nanoparticles in aquatic environments: interactive influence of water chemistry and nanopaticle characteristics

Author: Thwala, Melusi ; Radebe, N ; Tancu, Y ; Musee, N Date: Sep 2014 Transformation and bioavailability information of engineered nanoparticles (ENPs) in environmental systems impedes assessment of their potential risks to aquatic environments. In aqueous environments ENPs undergo numerous transformation ... Read more
From waste to wow – Low cost green technology for domestic wastewater treatment for reuse and beneficiation

Author: Steyn, Maronel ; Oberholster, Paul ; Genthe, Bettina ; Thwala, Melusi Date: Sep 2019 Phycoremediation makes use of macroalgae or microalgae and can be used to treat wastewater. This technique has the potential to be used as an alternative biomass source for bio-energy production. The current study utilizes a specific consortium ... Read more
How water chemistry determines the risk of metallic engineered nanoparticles in aquatic ecosystems: nAg and nZnO case study

Author: Thwala, Melusi ; Musee, N ; Sikhwivhilu, L ; Wepener, V Date: Sep 2013 The dispersion of nAg and nZnO engineered nanoparticles (ENPs) in water was investigated through the dissolution and agglomeration analysis over a 14 days exposure period. Before testing, the ENPs were in the nanoscale: 40-60 and 10-130 nm ... Read more
The interactive influence of water chemistry and nanoparticle characteristics in determining the environmental fate of metal-based nanoparticles: a case of nAg and nZnO

Author: Thwala, Melusi ; Radebe, N ; Tancu, Y ; Musee, N Date: Sep 2014 This study investigated the stability of nAg (40-60 nm) and nZnO (10-130 nm) NPs in Hoagland's Medium of half (50HM) and full (100HM) strengths as representative of complex water. The hydrodynamic size dynamics were studied using the Transmission ... Read more
Monitoring fate and behaviour of Nanoceria under relevant environmental conditions

Author: Tancu, Y ; Thwala, Melusi ; Musyoka, Nicholas M ; Musee, N Date: Nov 2014 The exponential use of engineered nanoparticles (ENPs) in commercial applications and of their resultant increasing release into the aquatic systems raises concerns as their potential impacts are unknown. According to the Organisation for ... Read more
The oxidative toxicity of Ag and ZnO nanoparticles towards the aquatic plant Spirodela punctuta and the role of testing media parameters: Conference paper

Author: Thwala, Melusi ; Musee, N ; Sikhwivhilu, L ; Wepener, V Date: Aug 2013 The toxicity effects of silver (nAg) and zinc oxide (nZnO) engineered nanoparticles (ENPs) on the duckweed Spirodela punctuta were studied to investigate the potential risks posed by these ENPs towards higher aquatic plants. The influence of ... Read more
The stability of Ag and ZnO engineered nanoparticles in Hoagland's nutrient water: the role of particle size and morphology

Author: Radebe, N ; Thwala, Melusi ; Cele, LM ; Sikhwivhilu, L ; Musee, N ; Shumbula, P Date: Aug 2013 The current study seeks to investigate the dissolution dynamics of silver (nAg) and zinc oxide (nZnO) engineered nanoparticles (ENPs), and how this affects their uptake by aquatic higher plants. First, the influence of particle size and ... Read more
Stability of silver nanoparticles (nAg) in aqueous solution: the role of particle size and water ionic strength

Author: Radebe, N ; Cele, LM ; Sikhwivhilu, L ; Shumbula, P ; Musee, N ; Thwala, Melusi Date: 2014 Silver nanoparticles (nAg) are currently some of the widely produced and applied in commercial products. Their high usage translates to an increased potential to environmental release, and more concerning is their complex toxicity towards ... Read more
Toxicity effects of Fe2O3, TiO2, ZnO, and Ag engineered nanomaterials (ENMs) on the macrophyte Spirodela species

Author: Thwala, Melusi ; Musee, N ; Wepener, V ; Oberholster, Paul J Date: 01 Sep 2010 This study is according to current literature the first to investigate the toxicity effects of ENMs on higher aquatic plants. Such information is vital for aquatic ecosystem protection information from the relatively less understood ENMs. The ... Read more
Zinc oxide and silver nanoparticles influence the antioxidative status in a higher aquatic plant, Spirodela punctata

Author: Thwala, Melusi ; Musee, N ; Wepener, V Date: Sep 2012 The authors present evidence of free radical activity and resultant anti-oxidative defence in Spirodela plants after exposure to 0.01-1000 mg/L of ZnO and Ag nanoparticles (NPs) over 96-h and 14-d. The quantification of reactive nitrogen and ... Read more
Zinc oxide and silver nanoparticles influence the antioxidative status in a higher aquatic plant, Spirodela punctata

Author: Thwala, Melusi ; Musee, N ; Wepener, V Date: Sep 2012 The authors present evidence of free radical activity and resultant anti-oxidative defence in Spirodela plants after exposure to 0.01-1000 mg/L of ZnO and Ag nanoparticles (NPs) over 96-h and 14-d. The quantification of reactive nitrogen and ... Read more

Now showing items 1-15 of 15

Browse

All of ResearchSpace
This Collection
- By Issue Date
- Authors
- Titles
- Subjects
- Publication Type
- Cluster
- Impact Area

Quick Links

Legislation and compliance

General Enquiries

Tel: + 27 12 841 2911
Email: callcentre@csir.co.za

Physical Address
Meiring Naudé Road
Brummeria
Pretoria
South Africa

Postal Address
PO Box 395
Pretoria 0001
South Africa

Social Connect

Copyright © CSIR 2017. All Rights Reserved

Resources on this site are free to download and reuse according to associated licensing provision. Please read the terms and conditions of usage of each resource.