Heavy metal concentrations in sediments and Cyprinus carpio from Maqalika Reservoir –Maseru, Lesotho: An analysis of potential health risks to Fish consumers

Gwimbi, Patrick; Kotelo, Ts’alikoe; Selimo, Masepele Jenette

doi:10.1016/j.toxrep.2020.03.005

Cited by 21 publications

(18 citation statements)

References 16 publications

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“…Addo-Bediako et al [ 32 ] also reported Pb concentration in fish in the range of 1000–1200 μg/kg which exceeded the regulatory standard limit. Gwimbi et al [ 74 ] reported that Pb in fish is absorbed in the blood which distribute the metal to the bone, tissue muscles and liver. The consumption of such fish will have detrimental effect on the consumer.…”

Section: Resultsmentioning

confidence: 99%

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Assessment of selected trace metals in fish feeds, pond water and edible muscles of Oreochromis mossambicus and the evaluation of human health risk associated with its consumption in Vhembe district of Limpopo Province, South Africa

et al. 2021

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Section: Resultsmentioning

confidence: 99%

“…Arsenic (As) is abundant [ 58 ] and carcinogenic in nature [ 74 ], and its chemical form often determines the toxicity level [ 18 ]. Fish has been reported to contain organic As in the food chain [ 75 ].…”

Section: Resultsmentioning

confidence: 99%

Assessment of selected trace metals in fish feeds, pond water and edible muscles of Oreochromis mossambicus and the evaluation of human health risk associated with its consumption in Vhembe district of Limpopo Province, South Africa

et al. 2021

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“…In another incident at Lithabaneng Township in Maseru, a medical waste was found mixed with commercial and industrial waste [ 23 ]. “Poor SWM contributes to increased concentrations of heavy metals in aquatic ecosystem, raising concerns because of its toxicological impacts on aquatic ecosystem and associated human health risk [ 24 ]”. Ref.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Ref. [ 24 ] show that poor SWM generated from industries and households poses a pollution threat to the Maqalika Reservoir in Maseru. This reservoir serves the Maseru inhabitants with drinking water and fish.…”

Section: Literature Reviewmentioning

confidence: 99%

“…This reservoir serves the Maseru inhabitants with drinking water and fish. Heavy metal sedimentation and concentration levels account for the primary exposure of human health [ 18 , 24 ] states that land development practices in Lesotho should be incorporated into indigenous practices of SWM by creating a tag called “Thotobolo” which means “Ash heap”. Thotobolo is a SW disposal area in each household yard that should not be considered or classified as landfill site because of its location, size and how it is managed by each individual rural community.…”

Section: Literature Reviewmentioning

confidence: 99%

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Methodology to Investigate Indigenous Solid Waste Systems and Practices in the Rural Areas Surrounding Maseru (Kingdom of Lesotho)

Senekane

Makhene

Oelofse

2021

IJERPH

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Solid waste management (SWM) is the greatest challenge facing environmental protection and human wellbeing in the rural communities of Maseru (Kingsom of Lesotho). A lack of formal waste management (WM) systems in rural areas of Maseru have resulted in different indigenous systems and practices of SWM. Direct observation and descriptive designs will be employed. This is a mixed methods study of qualitative, quantitative and, non-experimental. We obtained data sets from existing official census and statistics of Maseru. We sampled 693 participants from total population of 6917. We received ethical clearance from Research Ethics committee of Health Sciences at the University of Johannesburg, we recruited six field workers. We have preventive equipment (sanitizers, masks, and sterile latex gloves) for COVID-19 infections in place; we have specific design on caps, masks and bags that will identify field workers as they collect data. We will train field workers, administer questionnaires, interview, and observe participants. STATKON will analyse data. The research will share the results with the Ministry of Environment and the community in Lesotho. The results will also be used to educate the rural communities on improved WM. Where weaknesses are identified, mitigation measures can be evaluated and implemented to rectify the negative aspects and improve the systems and practices. The rural communities face challenges such as waste collection services and sanitation facilities and this fact points out that there is a gap in SWM, which favours the existence of indigenous systems and practice of SWM.

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Spatial variability in stable isotopes from Lesotho surface waters: insights into regional moisture transport

Fitchett,

Holmes,

Dahms-Verster

et al. 2024

Clim Dyn

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Precipitation in Lesotho is highly spatially variable, a feature of the high altitude and rugged topography. The hydroclimate dynamics, despite being critical to the water security of Lesotho and adjacent South Africa, are poorly understood. Ratios of oxygen and hydrogen isotopes in meteoric water are excellent tracers of hydroclimatic processes. This study presents the first analysis of stable isotopes from surface waters in Lesotho, and an investigation into the moisture sources. Our results demonstrate considerable variability in isotope values. There are statistically significant relationships between both oxygen and hydrogen isotopes and the altitude of the site and source of rivers sampled, and with hydrogen isotopes and longitude. The meteoric water line for the Lesotho samples is most closely aligned with that of the Global Network of Isotopes in Precipitation (GNIP) station at Harare, in Zimbabwe. The meteoric water line for Windhoek is more closely aligned to the Lesotho samples than the more proximate Cape Town or Pretoria meteoric water lines, which would more closely represent the South African winter- and summer-rainfall zones respectively. HYSPLIT back-trajectory air parcel analysis supports these findings, demonstrating a frequent continental anticyclonic track through southern Zimbabwe. Deuterium excess values vary widely, although are most likely related to processes during moisture transport rather than differences in moisture source. These findings are of particular importance in the context of the future water security of both Lesotho and South Africa, especially as the poleward displacement of the westerly moisture corridor has raised concerns for winter precipitation in the region.

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Heavy metal concentrations in sediments and Cyprinus carpio from Maqalika Reservoir –Maseru, Lesotho: An analysis of potential health risks to Fish consumers

Cited by 21 publications

References 16 publications

Assessment of selected trace metals in fish feeds, pond water and edible muscles of Oreochromis mossambicus and the evaluation of human health risk associated with its consumption in Vhembe district of Limpopo Province, South Africa

Assessment of selected trace metals in fish feeds, pond water and edible muscles of Oreochromis mossambicus and the evaluation of human health risk associated with its consumption in Vhembe district of Limpopo Province, South Africa

Methodology to Investigate Indigenous Solid Waste Systems and Practices in the Rural Areas Surrounding Maseru (Kingdom of Lesotho)

Spatial variability in stable isotopes from Lesotho surface waters: insights into regional moisture transport

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