Framework for assessing occupational health risks of municipal solid waste handlers for use by local government structures

Past studies have reported various occupational risks to municipal solid waste handlers (MSWHs). However, no generic framework has been developed for assessing the risks. Therefore, this thesis’ aim sought to develop a framework that local government structures can use for such purposes. To accomplish this task, the following objectives were formulated. The first objective was to review available literature regarding human health risks associated with municipal solid waste management operations. The PubMed literature search was used to identify relevant articles, published in the years 1995-2014. Also, references of potential articles were assessed to identify additional papers that conformed to the criteria for inclusion. 379 studies were found but only 72 met the concerned criteria. Methodological shortcomings such as usage of cross-sectional designs, small sample sizes, not enrolling reference groups, enrolling smaller reference groups, and not controlling possible confounders, were the major limitations of the studies. The proposed framework encourages local government structures to engage in or utilise methodologically sound studies that can yield valid and reliable findings. The second thesis objective determined the workplace hazards of MSWHs. Exposure assessments were done on various workplace hazards. Findings show that MSWHs are occupationally exposed to bioaerosols, chemicals, infectious material, physical and mechanical hazards. In light of the higher summer exposures of MSWHs to ultra-violet radiation and the reported health complaints, the study recommended: i) waste collection to be done at night or early morning and ii) regular breaks, rest and rehydration of MSWHs with oral fluids. A publication to disseminate these findings was made in an accredited open access journal. The findings partly constitute phase 1’ output 1 in the framework. The third thesis’ objective assessed the risky job actions of MSWHs. Postural measurements were performed using the Rapid Upper Limbs Assessment method. The findings indicate that MSWHs use unsafe work postures when performing the bin lifting, carrying and emptying tasks. The study recommended: i) mechanisation of refuse bin collection, where feasible, ii) training MSWHs on safe working postures and iii) supervision of waste collection tasks. Also, under phase 1’s output 1, the framework stresses the need to examine ergonomic risks of waste collection services. The findings on objective 3 were disseminated in form of a publication. Objectives 4-7 sought to develop, validate, refine and compile a framework for assessing occupational health risks of MSWHs. An SWOT analysis of available human and environmental risk assessment frameworks was done and the findings were used as a base for the draft framework. The developed draft framework validated and revised through iteration workshops in small, medium and large local government structures. This thesis proves that Mr Ncube is conversant with the nature and purpose of this relevant investigation. From his thesis Mr Ncube has published 3 articles in peer reviewed journals.Thesis (PhD)--University of Pretoria, 2017.School of Health Systems and Public Health (SHSPH)PhDUnrestricte

Trace elements in groundwater near an abandoned mine tailings dam and health risk assessment (NE Zimbabwe)

Groundwater from shallow hand-dug wells at an abandoned gold mine tailings dam was characterised for selected physicochemical parameters during dry and wet seasons of 2018 and 2019. Health risk exposure of the local population (adults and children) through ingestion and dermal exposure was assessed. Groundwater quality parameters were lower than international drinking water quality guidelines (p < 0.05). The parameters were significantly influenced by season of the year (As, Cl−, SO42−), nature (As, Cd, Cl−, Fe, NO3−, SO42−), depth (Cd, Cl−, Fe, Ni, SO42−) and direction of the well (Cu, Cl−, Fe, NO3−, Pb, SO42−) (p < 0.05) relative to the tailings dam. Groundwater did not pose non-carcinogenic risk due to studied trace elements. However, arsenic had the potential to cause medium to high cancer risk to the local population. We propose re-vegetation of the tailings dam, diversion of surface tailings drainage to a containment pond and the provision of continuous piped water supplies

A systematic critical review of epidemiological studies on public health concerns of municipal solid waste handling

AIMS : The ultimate aim of this review was to summarise the epidemiological evidence on the association between municipal solid waste management operations and health risks to populations residing near landfills and incinerators, waste workers and recyclers. To accomplish this, the sub-aims of this review article were to (1) examine the health risks posed by municipal solid waste management activities, (2) determine the strengths and gaps of available literature on health risks from municipal waste management operations and (3) suggest possible research needs for future studies.METHODS : The article reviewed epidemiological literature on public health concerns of municipal solid waste handling published in the period 1995-2014. The PubMed and MEDLINE computerised literature searches were employed to identify the relevant papers using the keywords solid waste, waste management, health risks, recycling, landfills and incinerators. Additionally, all references of potential papers were examined to determine more articles that met the inclusion criteria. RESULTS : A total of 379 papers were identified, but after intensive screening only 72 met the inclusion criteria and were reviewed. Of these studies, 33 were on adverse health effects in communities living near waste dumpsites or incinerators, 24 on municipal solid waste workers and 15 on informal waste recyclers. Reviewed studies were unable to demonstrate a causal or non-causal relationship due to various limitations. CONCLUSION : In light of the above findings, our review concludes that overall epidemiological evidence in reviewed articles is inadequate mainly due to methodological limitations and future research needs to develop tools capable of demonstrating causal or non-causal relationships between specific waste management operations and adverse health endpoints.http://pph.sagepub.comhb2017School of Health Systems and Public Health (SHSPH

Commentary on the Organisation of Occupational Health and Safety in Southern Africa, the International Labour Organization and Policies in General

Background: The design and implementation of sound occupational health and safety (OHS) programmes require understanding of the main issues that need attention. This article highlights key issues regarding the (i) organisation of OHS services in southern Africa, (ii) role of the International Labour Organization (ILO) in the provision of OHS services and (iii) implementation of policies in general. Methods: Relevant peer-reviewed journal articles, ILO conventions and policies were identified and discussed. Results: Inadequacies that exist on the organisation of OHS services in southern Africa include (i) lack of some critical categories of OHS practitioners, (ii) no emphasis on the surveillance of the work environment (iii) disregard of the worker’s right to refuse to work in unsafe work environments and (iv)non-coverage of some sectors of the economy. Further research is needed to identify additional efforts that the ILO requires to effectively discharge its OHS promotion mandate. Conclusion: Responsible authorities need to attend to the shortcomings of the national OSH laws and intergovernmental pacts

Validation of the framework for assessing occupational health risks of municipal solid waste handlers

BACKGROUND : The occupational health risks associated with municipal solid waste handling are widely documented in literature. However, no framework has been developed for their assessment. The aim of this study was to develop and validate a tool for use by local government structures. METHODS : Epidemiological evidence on human health risks associated with municipal solid waste management (MSWM) was obtained from literature and primary data collected from the study sites. An analysis of strengths, weaknesses, opportunities and threats (SWOT) of available human and environmental risk assessment frameworks was done and the findings were used as a base for the framework. The proposed framework was validated through iteration workshops in small, medium and large local government structures. Also, it was presented in a safety and health conference, in order obtain the input of occupational health and safety practitioners, researchers and policy makers. RESULTS : A draft framework was produced, validated and revised to incorporate resolutions made from the iteration workshops. The final framework constitutes four inputs, six phases and four principles. Each phase has defined outputs. CONCLUSION : The applicability of the framework to situations of resource-constrained economies has been tested through validation workshops in small, medium and large local government structures of a low income country. In light of the multi-methods used in developing the framework and the input of practitioners in validation workshops, the framework appears relevant for the purposes of assessing occupational health risks of municipal solid waste handlers (MSWHs).http://www.ccsenet.org/journal/index.php/gjhs/indexam2019School of Health Systems and Public Health (SHSPH

Predictors of hand hygiene behaviours among primary and secondary school children in a rural district setting in Zimbabwe: A cross-sectional epidemiologic study

© 2020, IWA Publishing. All rights reserved. Hand hygiene is one of the most effective and efficient ways of controlling faecal–oral diseases. However, little is known about the predictors of hand hygiene behaviours among school children. A predesigned checklist guide was used to observe hygiene behaviours of 460 pupils from four rural schools in Shamva South district, Zimbabwe. A pretested questionnaire was administered to obtain demographic data of the observed school children. Membership of a Water, Sanitation and Hygiene (WASH) club, age, gender and the level of education were associated with hand hygiene practices (p \u3c 0.05). The findings indicated that investing in hand hygiene behaviour change processes among school children using the promotion, formation, resuscitation and empowerment of WASH clubs in schools is important in disease prevention among communities in developing countries

Contamination of Soil with Pb and Sb at a Lead-Acid Battery Dumpsite and Their Potential Early Uptake by Phragmites australis

Recycling of spent Lead-Acid Batteries (LABs) and disposal of process slag potentially contaminate soil with Pb and Sb. Total and available concentrations of Pb and Sb in three soil treatments and parts of Phragmites australis were determined by atomic absorption spectrophotometry. Soil with nonrecycled slag (NR) had higher total metal concentrations than that with recycled slag (RS). Low available fractions of Pb and Sb were found in the soil treatments before planting P. australis. After 16 weeks of growth of P. australis, the available fractions of Pb had no statistical difference from initial values (p>0.05) while available Sb fractions were significantly lower when compared with their initial values (p<0.05). Metal transfer factors showed that P. australis poorly accumulate Pb and Sb in roots and very poorly translocate them to leaves after growing for 8 and 16 weeks. It may be a poor phytoextractor of Pb and Sb in metal-contaminated soil at least for the 16 weeks of its initial growth. However, the plant established itself on the metalliferous site where all vegetation had been destroyed. This could be useful for potential ecological restoration. The long-term phytoextraction potential of P. australis in such environments as LABs may need further investigation

Bioaerosols, Noise, and Ultraviolet Radiation Exposures for Municipal Solid Waste Handlers

Few studies have investigated the occupational hazards of municipal solid waste workers, particularly in developing countries. Resultantly these workers are currently exposed to unknown and unabated occupational hazards that may endanger their health. We determined municipal solid waste workers’ work related hazards and associated adverse health endpoints. A multifaceted approach was utilised comprising bioaerosols sampling, occupational noise, thermal conditions measurement, and field based waste compositional analysis. Results from our current study showed highest exposure concentrations for Gram-negative bacteria (6.8 × 103 cfu/m3) and fungi (12.8 × 103 cfu/m3), in the truck cabins. Significant proportions of toxic, infectious, and surgical waste were observed. Conclusively, municipal solid waste workers are exposed to diverse work related risks requiring urgent sound interventions. A framework for assessing occupational risks of these workers must prioritize performance of exposure assessment with regard to the physical, biological, and chemical hazards of the job

Postural analysis of a developing country’s municipal solid waste handlers and a reference group of hospital general hands using the RULA method

BACKGROUND : Municipal solid waste handlers perform various work activities which may contribute to the onset of work-related musculoskeletal disorders (WRMDs). This study conducted a postural analysis of these workers and a reference group of hospital general hands in order to identify unsafe working postures requiring correction. METHODS : The Rapid Upper Limb Assessment (RULA) methodology was used for postural analysis to 30 municipal solid waste handlers (MSWHs) and a reference group of 30 hospital general hands (HGHs) involved in similar work activities. Field observations and photography were used to collect data. Collected data was analysed using STATA version 13. RESULTS : The Mann-Whitney test was used to compare the two groups. Results showed significant differences (p < 0.05) for lifting, carrying and emptying activities. For both groups, the mean postural scores for pushing, pulling and standing activities were mainly in the low risk category and not statistically significant (p > 0.05). CONCLUSION : Results of the present study show unsafe RULA postural scores to MSWHs with regard to lifting, carrying and emptying of refuse bins. Such scores are suggestive of an elevated risk to developing WRMDs in these workers compared to the reference group.http://www.ccsenet.org/journal/index.php/gjhs/indexam2018School of Health Systems and Public Health (SHSPH

Current Status and the Future of Occupational Safety and Health Legislation in Low- and Middle-Income Countries

This article addresses three key issues. First, the commonalities, differences, strengths, and limitations of existing occupational safety and health (OSH) legislation of low- and middle-income countries were determined. Second, required revisions were identified and discussed to strengthen the laws in accordance with the best international practice. Finally, proposals for additional OSH laws and interventions were suggested. A literature search of OSH laws of 10 selected low- and middle-income countries was carried out. The laws were subjected to uniform review criteria. Although the agricultural sector employs more than 70% of the population, most of the reviewed countries lack OSH legislation on the sector. Existing OSH laws are gender insensitive, fragmented among various government departments, insufficient, outdated, and nondeterrent to perpetrators and lack incentives for compliance. Conclusively, the legal frameworks require reformation and harmonization for the collective benefit to employees, employers, and regulatory authorities. New OSH legislation for the agricultural sector is required. Keywords: Harmonization, Legislation, Low- and middle-income country, Occupational safety and health, Refor