scholarly journals Assessment of heavy metal pollution in the sediments of Dwars River, South Africa

Author(s):  
Abe Addo-Bediako ◽  
Tebatso Mmako ◽  
Millicent Kekana ◽  
Wilmien Luus-Powell

Abstract The Dwars River in Limpopo Province, South Africa is being affected by anthropogenic activities such as mining, agriculture and human settlement in its catchment. The objectives of the study were to assess trace metal pollution, to determine possible sources of pollutants in the river and the potential impact on the ecosystem, aquatic biota and humans. Water and sediment samples were collected and analyzed for the following selected metals: Cr, Cu, Fe, Mn, Ni, Pb and Zn. The enrichment factor (EF) and geo-accumulation index (Igeo) were used to determine the extent of trace metal pollution in the sediments. The concentrations of Cr, Fe, Mn, Ni, and Zn in the Dwars River sediments were much higher than the average shale values, which indicated that the contamination of these metals might be caused by human activities. The enrichment factor (EF) results showed that Cr and Ni accumulated to severe enriched level, while the Igeo results indicated that Cr, Mn, Ni and Zn were strongly contaminated in the sediments. The main sources of pollutants in the area were mining, wastewater/sewage and agricultural discharges. This may pose a serious threat to the aquatic biota and potential human health risk. It is therefore recommended that proper management strategies should be taken to minimize the impact of these metals on the river.

2006 ◽  
Vol 39 (2) ◽  
pp. 275-287 ◽  
Author(s):  
Masingita Khandlhela ◽  
Julian May

2021 ◽  
Vol 14 (1) ◽  
pp. 571-580
Author(s):  
Tshilidzi O. Ramakulukusha ◽  
Sunday S. Babalola ◽  
Ntsieni S. Mashau

Background: Violent behaviour in youth is regarded as a significant public health problem associated with severe physical and psychological consequences. Despite the availability of rehabilitation programmes rendered at child and youth care centres (CYCC's) in the Limpopo Province, South Africa, there is an escalation and repetition of violent behaviours among the youth due to some underlying socio-economic factors. Objective: The study sought to explore and describe the factors contributing to violent behaviours among the youth. Methods: A qualitative, explorative, and descriptive research design was used. A non-probability, purposive sampling method was used to select participants in this study. The study population consisted of youth, from the age of 15-20 years old, who were admitted to the child and youth care centres due to violent behaviours. Focus group discussions and in-depth individual interviews were used to collect data from participants. A semi-structured interview guide and focus group discussion guide were used to collect data until data saturation which occurred after interviewing 48 participants. Data were analysed following Tesch’s open code data analysis technique. Measures to ensure trustworthiness and ethical principles were adhered to. Results: Two themes emerged from the analysed data, namely, the socio-economic factors contributing to violent behaviours among the youth in CYCCs and the effectiveness of rehabilitation programmes for violent youth behaviours in CYCCs. Eight sub-themes were derived from the two main themes. The home environment, the influence of delinquent peers, availability, and misuse of drugs and alcohol were most cited as the factors contributing to violent behaviours among the youth in CYCCs in the Limpopo Province. The study's findings revealed that youth had little knowledge of the impact that violent behaviour has on the victim, themselves, their families, and society. Conclusion: Rehabilitation programmes for violent behaviours among the youth will have better outcomes by involving the youth's family, especially the parents/guardians. Also, the child and youth care centres and youth violence policymakers need to emphasise family education as one of the most crucial violence prevention strategies in vulnerable youth.


Ecotoxicology ◽  
2018 ◽  
Vol 28 (1) ◽  
pp. 76-85 ◽  
Author(s):  
Sarah Leclaire ◽  
Marion Chatelain ◽  
Anaïs Pessato ◽  
Bruno Buatois ◽  
Adrien Frantz ◽  
...  

Author(s):  
Forbes Chiromo ◽  
Goodwell Muyengwa ◽  
Joseph Makuvaza

AbstractThis study investigates the extent to which tenants in a jewellery incubator in the Limpopo Province of South Africa network. Since 1994 SEDA has set up more than 31 incubation centres in furniture making, construction, chemicals, jewellery, ICT, metal fabrication, agriculture and small scale mining. This study was done through a survey conducted on tenants in the SEDA Limpopo Jewellery Incubator (SLJI). Information was obtained through a structured questionnaire. The study revealed how tenants benefit from networking around exhibitions and collective purchasing of raw material. Through the Incubator institutional mechanisms, the study explains how tenants share expertise, experiences, technology and resources. Unfortunately the tenants do not initiate the own networking programmes. They lose out on benefits associated with collective effort in other areas such as advertisements, lobbying the government for industrial stands, organising an newsletter, hiring of consultants, and organising joint training programmes. Lastly the study identified opportunities that the tenants could collectively exploit in order strengthen and sustain their businesses.


2010 ◽  
Vol 15 (4) ◽  
pp. 465-483 ◽  
Author(s):  
STIJN SPEELMAN ◽  
STEFANO FAROLFI ◽  
AYMEN FRIJA ◽  
MARIJKE D'HAESE ◽  
LUC D'HAESE

ABSTRACTWater rights are currently receiving increased attention from scholars and policymakers due to the growing understanding that ill-defined water rights impair efficient use. In South Africa, smallholder irrigation faces problems of low water use efficiency and cost recovery of government investments. This study uses contingent ranking to analyse the willingness to pay (WTP) of smallholder irrigators for changes in the water rights system. The results indicate that smallholders are prepared to pay considerably higher water prices if these are connected to improvements in the water rights system. By segmenting the population it was also shown that the importance attached to water rights dimensions varies in each segment. While lower institutional trust and lower income levels lead to a lower WTP for transferability, experiencing water shortage increases this WTP. Such information is valuable in guiding policy makers in the future design of water rights.


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