Publications by authors named "Linda L Sibali"
Per- or poly-fluoroalkyl substances (PFAS) are a group of anthropogenic compounds that are used in a variety of industrial processes and consumer products with their ubiquitous presence in the environment recently gaining relevant attention. Progress and milestones on PFAS contamination within multiple environments from African continent are highlighted in this review. Identification and quantitation of PFAS within African environments is important to the public at large because of their toxicity and possible ecotoxicological risk.
View Article and Find Full Text PDFLegacy and novel brominated flame-retardants in different fish types from inland freshwaters of South Africa: levels, distribution and implications for human health.
Int J Environ Health Res
February 2022
Article Synopsis
- This study identifies the presence of polybrominated biphenyls (PBBs), polybrominated diphenyl ethers (PBDEs), and novel brominated flame-retardants (NBFRs) in various fish species from the Vaal River in South Africa.
- Concentrations of these contaminants varied by species, with catfish showing the highest levels (up to 12.8 ng g wet weight) and mudfish showing the lowest (up to 3.4 ng g wet weight), influenced by their feeding habits and ecological status.
- The overall risk assessment indicates low hazard quotients for these contaminants, suggesting that consuming these fish does not pose significant health risks to the South
It has been extensively demonstrated that plants accumulate organic substances emanating from various sources, including soil and water. This fact suggests the potentiality of contamination of certain vital bioresources, such as medicinal plants, by persistent contaminants, such as perfluorooctanoic acid (PFOA), perfluorooctane sulfonate (PFOS), and perfluorobutane sulfonate (PFBS). Hence, in this study, the propensity of L.
View Article and Find Full Text PDFA gas chromatography-mass spectrometry (GC-MS) method was investigated for the simultaneous analysis of two types of endocrine disrupting compounds (EDCs), i.e., alkylphenol ethoxylates and brominated flame retardants (BFRs), by extraction and derivatization followed by GC-MS.
View Article and Find Full Text PDFDetermination of selected phthalate esters compounds in water and sediments by capillary gas chromatography and flame ionization detector.
J Environ Sci Health A Tox Hazard Subst Environ Eng
October 2013
Article Synopsis
- The study focuses on the environmental levels of phthalate esters (PAEs) in the Jukskei River catchment area of South Africa, aiming to highlight the need for monitoring these pollutants.
- Researchers conducted the study in 2005 during both summer and winter, using optimized methods like liquid-liquid extraction and Soxhlet extraction to analyze samples from water and sediments.
- Findings revealed that PAEs were present at low concentrations in water (ranging from 0.04 to 9.76 ng/mL) and sediments (up to 4910 ng/g), mostly below the U.S. EPA water quality guidelines, indicating a need for ongoing environmental monitoring.
Determination of DDT and metabolites in surface water and sediment using LLE, SPE, ACE and SE.
Bull Environ Contam Toxicol
December 2009
Surface water and sediment samples collected from Jukskei River in South Africa, were subjected to different extraction techniques, liquid-liquid (LLE), solid-phase extraction (SPE), activated carbon extraction (ACE) and soxhlet extraction (SE) for sediment. The samples were extracted with dichloromethane, cleaned in a silica gel column and the extracts quantified using a Varian 3800 GC-ECD. The percentage recovery test for 2,4'DDT, DDE and DDD and 4,4'DDT, DDE and DDD in water ranged from 80%-96% and 76%-95% (LLE); 56%-76% and 56%-70% (SPE) and 75%-84% (ACE), respectively; while that recoveries for sediment samples varied from 65%-95% for 2,4'DDT, DDE and DDD and 80%-91% for 4,4'DDT, DDE and DDD.
View Article and Find Full Text PDF