Occurrence and treatment of contaminants of emerging concern in the African aquatic environment: Literature review and a look ahead

K'Oreje, Kenneth; Okoth, Maurice; Langenhove, Herman Van; Demeestere, Kristof

doi:10.1016/j.jenvman.2019.109752

Cited by 91 publications

(67 citation statements)

References 190 publications

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“…Hence, the relative contribution of the various pathways to human exposure remains unclear. The human exposure and health risks associated with antibiotic resistance in the funeral industry could be particularly high in developing countries due to the following factors among others; (1) weak and poorly enforced environmental regulations, regulatory agencies lacking expertise and resources, and severe environmental pollution ( K'oreje et al, 2020 ), and (2) over-reliance on untreated drinking water from unprotected water sources such surface water and shallow wells ( Potgieter et al, 2020 ).…”

Section: Human Health Risk Assessment and Controlsmentioning

confidence: 99%

The ‘thanato-resistome’ - The funeral industry as a potential reservoir of antibiotic resistance: Early insights and perspectives

Gwenzi

2020

Science of The Total Environment

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The funeral industry is a potential reservoir of antibiotic resistance. The occurrence, human exposure and health risks of antibiotic resistance in the funeral industry were examined. The funeral industry harbours antibiotic resistance to multiple common and last-resort antibiotics, hence constitutes the ‘ thanato-resistome ’. Hydrological processes, air-borne particulates and vectors disseminate antibiotic resistance, while horizontal gene transfer circulates antibiotic resistance among resistomes, forming a complex network. Ingestion, inhalation of air-borne particulates, dermal intake and clothes of workers contribute to human exposure. Human health risks include; development of drug resistance in previously susceptible pathogens, and increased morbidity and mortality caused by increased pathogenicity and outbreaks of multi-drug resistant infections. Ecological risks include the proliferation of resistant organisms at the expense of susceptible ones, thereby disrupting ecosystem structure and function, including biogeochemical cycles. Barring inferential data, quantitative evidence linking antibiotic resistance to human infections is weak. This reflects the lack of systematic quantitative studies, rather than the absence of such health risks. Quantitative risk assessment is constrained by lack of quantitative data on antibiotic resistance in various reservoirs and exposure routes. A framework for risk assessment and mitigation is proposed. Finally, ten hypotheses and emerging tools such as genomics, in silico techniques and big data analytics are highlighted.

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Section: Human Health Risk Assessment and Controlsmentioning

confidence: 99%

The ‘thanato-resistome’ - The funeral industry as a potential reservoir of antibiotic resistance: Early insights and perspectives

Gwenzi

2020

Science of The Total Environment

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“…Although pesticides benefit food production ( De Souza et al , 2020 ) many agrochemicals reach and pollute non-target aquatic environments, posing a threat to human health and wildlife species. The National Water Act of South Africa (36:1998) ( Department of Water Affairs and Forestry, 1998 ) forms the basis of protecting water bodies in South Africa against environmental pollution ( K’oreje et al , 2020 ). Nevertheless, the presence of agrochemicals in many South African rivers has been well-documented (e.g.…”

Section: Introductionmentioning

confidence: 99%

Agrochemicals in freshwater systems and their potential as endocrine disrupting chemicals: A South African context

Horak

Horn

Pieters

2021

Environmental Pollution

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South Africa is the largest agrochemical user in sub-Saharan Africa, with over 3 000 registered pesticide products. Although they reduce crop losses, these chemicals reach non-target aquatic environments via leaching, spray drift or run-off. In this review, attention is paid to legacy and current-use pesticides reported in literature for the freshwater environment of South Africa and to the extent these are linked to endocrine disruption. Although banned, residues of many legacy organochlorine pesticides (endosulfan and dichlorodiphenyltrichloroethane (DDT)) are still detected in South African watercourses and wildlife. Several current-use pesticides (triazine herbicides, glyphosate-based herbicides, 2,4-dichlorophenoxyacetic acid (2,4-D) and chlorpyrifos) have also been reported. Agrochemicals can interfere with normal hormone function of non-target organism leading to various endocrine disrupting (ED) effects: intersex, reduced spermatogenesis, asymmetric urogenital papillae, testicular lesions and infertile eggs. Although studies investigating the occurrence of agrochemicals and/or ED effects in freshwater aquatic environments in South Africa have increased, few studies determined both the levels of agricultural pesticides present and associated ED effects. The majority of studies conducted are either laboratory-based employing in vitro or in vivo bioassays to determine ED effects of agrochemicals or studies that investigate environmental concentrations of pesticides. However, a combined approach of bioassays and chemical screening will provide a more comprehensive overview of agrochemical pollution of water systems in South Africa and the risks associated with long-term chronic exposure.

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“…Industrial development and population growth has led to the use of many toxic chemicals. Every day a wide range of pharmaceutical products and pesticides are released into the environment [1]; they are detected at concentrations ranging from ng•L −1 to µg•L −1 in wastewater, surface water, groundwater and treated drinking water [1,2]. Research has shown various ecotoxicological effects of pharmaceutical products and pesticides.…”

Section: Introductionmentioning

confidence: 99%

Kinetic degradation of amoxicillin by using the electro-Fenton process in the presence of a graphite rods from used batteries

Kadji

Yahiaoui

Garti

et al. 2021

Chinese Journal of Chemical Engineering

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This study reports the removal of amoxicillin (AMX) in aqueous media using the electro-Fenton process in the presence of a graphite cathode recovered from used batteries. The impact of the relevant parameters on the electro-Fenton process, namely the applied current intensity, the temperature, the initial concentration of AMX and the initial concentration of ferrous ions were investigated. The results showed that the optimal values were: I= 600 mA, T= 25°C, [AMX] 0 = 0.082 mmol•L −1 and [Fe 2+ ]= 1 mmol•L −1 , leading to 95% degradation and 74% mineralization. The model parameters of AMX mineralization were determined using nonlinear methods, showing that it follows a pseudo-second-order kinetic. The Energy consumption (EC) calculated under the optimal values was found to be 0.79 kW•h −1 •g −1 , which was of the same order of magnitude of those reported in other findings; while it is noteworthy that the electrodes used in our study are of a lower cost.

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Occurrence and treatment of contaminants of emerging concern in the African aquatic environment: Literature review and a look ahead

Cited by 91 publications

References 190 publications

The ‘thanato-resistome’ - The funeral industry as a potential reservoir of antibiotic resistance: Early insights and perspectives

The ‘thanato-resistome’ - The funeral industry as a potential reservoir of antibiotic resistance: Early insights and perspectives

Agrochemicals in freshwater systems and their potential as endocrine disrupting chemicals: A South African context

Kinetic degradation of amoxicillin by using the electro-Fenton process in the presence of a graphite rods from used batteries

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