An overview of waste management practices of street vendors in sub-saharan africa: A meta-analysis.

Many low-income developing countries struggle with waste collection and the development of disposal facilities, leading to issues such as illegal dumping and poor enforcement of waste management regulations. The pollution caused by street vendors' waste is particularly evident in the central business districts of cities in developing nations. The informal economy, which includes activities such as street vending has become prevalent in developing countries, particularly in Sub-Saharan African (SSA) nations. This study aims to conduct a systematic review and meta-analysis of existing literature on street vendors' waste management practices in the region, with a focus on understanding the factors influencing waste mismanagement and identifying integrated strategies employed across SSA. In most SSA areas, research is conducted to evaluate food vendor hygienic practices (33%), however the waste management component, which is crucial to hygiene, makes up just 15%, which is twice as small as the research that focused on hygienic practices. As a result, street vendors in the majority of sub-Saharan nations have little interest in waste management procedures. Many street vendors in the region resort to informal waste disposal methods because of no access to formal waste management infrastructure since they are not recognised as formal businesses. The study acknowledges the street vendors' contribution to food security in developing Sub Saharan Africa, as well as the significance of comprehending their waste management practices. Despite their prevalence in urban areas, these informal businesses still face a lack of recognition and inclusion from governing bodies. Therefore, the study emphasises the necessity of incorporating street vendors into formal municipal waste management systems and providing them with enhanced infrastructure and services. Given that the lack of recognition subsequently make it challenging to integrate vendors into formal waste management systems. Subsequently this has a negative cumulative impact on developing and enforcing clear regulations that specify the responsibilities of street vendors in waste management. Thus, leading to the absence of comprehensive by laws regulations governing waste management for street vendors within Sub-Saharan Africa.

Preliminary Assessment of Chemical Elements in Sediments and Larvae of Gomphidae (Odonata) from the Blyde River of the Olifants River System, South Africa.

Benthic macroinvertebrates and sediments can act as good indicators of environmental quality. The aim of this study was to assess the accumulation of chemical elements in the Gomphidae (Odonata) collected in the Blyde River. Seven sites were sampled for river sediments assessment and five sites for larvae (naiads) of Gomphidae bioaccumulation analysis. The tissue samples were analysed using inductively coupled plasma optical emission spectrometry (ICP-OES). The results showed high levels of all of the tested elements except Cd in the sediment. The mean concentrations of As, Cu and Cr exceeded the standard guideline values, whereas Pb and Zn were below the standard guideline values. In the insect body tissue, the concentrations of most elements were higher than in the sediments. The elements with the highest concentrations were Mn, Zn, Cu, and As. The bioaccumulation factor (BF) showed a tendency for bioaccumulation for almost all of the selected elements in the insect. The BF value was high for Cu, Mn, Sb, and Zn (BF > 1). The high concentrations of elements in the insect body tissue may pose a risk to fish that consume them, and subsequently to humans when fish from the river are consumed. It is therefore important to monitor the river to reduce pollution to prevent health risks in humans, especially in communities that rely on the river for water and food.