Impacts of Mercury Exposure on Human Health, Safety and Environment: Literature Review and Bibliometric Analysis (1995 to 2021)

Introduction: Mercury is a highly toxic and persistent contaminant found in food and parts of the environment. Over the years, global research on mercury poison has soared owing to concerns about its effects on human health, occupational safety, and environmental sustainability. Although numerous studies have identified and examined the various types, sources, toxicity, exposure, and impacts of mercury, comprehensive studies on the research landscape and scientific developments on the subject areas are currently lacking. Therefore, this paper shows a bibliometric analysis (BA) and literature review (LR) of the top publications, funders, organisations, and countries working on Mercury research worldwide. Methods: The research landscape on the subject area was examined by BA from 1995 to 2021, whereas the scientific developments were highlighted through LR. Results: Results showed that mercury research has gained global prominence since the discovery of the Minamata disease in 1956. The most prolific mercury researchers, institutions, and funders are from the United States, Japan, Brazil, Canada, and China, whereas the publications on Mercury research doubled over the period. The top source titles for publications on Mercury are Neurotoxicology, Science of the Total Environment, and Environmental Health Perspectives. However, Micheal Aschner (US) and Takashi Yorifuji (Japan) are the most prolific researchers. Co-occurrence analysis revealed that mercury, methyl mercury, fish, toxicity, and Minamata disease are the most cited keywords, which shows the correlation nexus between fish consumption and mercury poisoning. Conclusion: The LR showed that mercury research is widely investigated due to global concerns about its impact on human health, safety, and the environment

Uncovering Research Trends in Safety Culture in the Global Construction Industry: A Bibliometric Analysis (1995-2020)

Introduction: Safety culture has mainly been used across several safety management literatures to describe the level of safety within workplaces. This paper presents the research landscape and scientific developments on safety culture in the global construction industry. Methods: The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) approach was employed to identify, screen, and analyze the published documents indexed in the Elsevier Scopus database. Next, the research landscape and scientific developments on the topic were examined by bibliometric analysis (BA) through co-authorship, keywords co-occurrence, and citations. Results: Results showed that 738 documents were published and indexed on the topic between 1995 and 2020. The findings showed that articles are the preferred medium, whereas Engineering is the preferred subject theme for published documents on the topic. The journal of Safety Science (published by Elsevier) is the most influential source of publications on the topic. In contrast, Dongping Fang, based at Tsinghua University (China), is the most influential researcher due to the substantial research grants and financial support from the National Natural Science Foundation. Further analysis showed that the most prolific authors on the topic are based in China, Australia, and Indonesia, although the United States has published the most documents. BA also revealed large networks of researchers and co-occurring keywords and the organizations and countries that currently exist, collaborate, and cite each other works on the topic. Conclusion: The findings indicate that safety culture in the global construction industry has undergone significant scientific developments resulting in high research impact mainly due to its role in preserving the health and safety of workers

Post-Covid Workplace Scenario – Employer and Employee Health and Safety

The decreasing trend in the spread of the covid-19 infection has relaxed the restrictions imposed on the community, especially the working people. This working community, whether or not infected by the virus is now slowly turning back to work, along with the impacts of the lockdown. Though there is a decrease in the infection rate, there is always the possibility of infection at the workplace, as some percentage of the vaccinated people are also getting infected. It is absolutely necessary to follow the covid precautionary measures. Hence, it cannot be said that the normal situation has returned. The employer is in a state to manage a crowd comprising post-covid patients, caretakers of covid patients and non-affected groups. The literature works reporting on post covid scenario, precautionary measures to be taken and workplace, benefits of workplace social distancing and sanitation, and medical care needed for workers were reviewed. This paper discusses the post-pandemic workplace scenario, health and safety, sanitation among workers, awareness of precautionary measures and their behavioral changes

Prevalence and factors associated with lung function abnormalities among rice millworkers in Sokoto state, Northwest Nigeria

Introduction: Northwest Nigeria has witnessed an increase in rice milling activities due to the ban on rice importation. The majority of workers in the industry, as it is in many informal sectors workers are disproportionately affected by hazards in the workplace due to poor usage of protective devices. Inhalation of dust over a long period results in lung function abnormalities. The study assessed the prevalence and factors associated with lung function abnormalities among rice mill workers in Sokoto state, Northwest Nigeria. Methods: The study was conducted using a cross-sectional design. Data were collected between June 2019 and July 2019 using an interviewer-administered questionnaire and a lung function examination was conducted using a calibrated Contec SP10 digital spirometer following standardized procedures. Data were analyzed using IBM SPSS version 23 and presented in tables and charts. Results: About a third of 119 (30.2%) of the respondents had abnormalities on spirometry, and there was a statistically significant reduction in the mean FVC (3.63 ± 0.39) and FEV1 (3.01 ± 0.36). Being at least 30 years of age (aOR=3.3), working more than 8 hours a day (aOR=2.4), and having at least a symptom of respiratory morbidity (aOR=10.1) were the factors found to be significantly associated with lung function abnormalities. Conclusion: This study showed that the prevalence of lung function abnormality among rice mill workers in Sokoto state is relatively high and age, number of hours worked per day and having at least a symptom of respiratory morbidity were the factors associated with lung function abnormalities

Occupational health hazards and use of personal protective equipment among automobile mechanics in Surulere local government area of Lagos State, Nigeria - a descriptive study

Introduction: The job of an automobile mechanic is associated with hazards, illness, and injuries, which may result in sickness, absenteeism, economic loss, disability, or even death. This study assessed the level of knowledge and workplace safety practice by automobile mechanics. Methods: A descriptive cross-sectional study was carried out among 120 registered automobile mechanics in Surulere Local Government Area of Lagos State, Nigeria. A questionnaire was used to obtain information on socio-demography and occupational health practices. Data entry and analysis were done with Epi-info 3.5.1(2008). Chi-square and Fischer Exact tests were used to test for significance. Results: The respondents were all males with a mean age of 39.9±7.5 years, the majority learned the trade through apprenticeship (95.80%) and on full-time work (98.30%). Most respondents (95.8%) were aware of at least one health problem associated with its hazards. Over 75% of respondents were aware of physical hazards. Over eighty percent (84.17%) of respondents used their own overalls, 40% of them used overalls regularly, and only 26.67% of respondents used overalls appropriately. Conclusion: Many respondents were aware of health problems, occupational hazards, and PPE used in the Automobile workplace but did not translate to good practice of workplace safety as seen in only 1.67%. The respondents did not deem the use of PPE necessary and lack, or inadequate training on the ‘how’ and ‘why’ PPE were identified as factors hindering PPE use. Workers' training and adherence monitoring could help improve good workplace safety practices in Lagos, Nigeria

Factors affecting post-traumatic growth in South Korean police officers by age group

Introduction: Police officers are exposed to a variety of traumatic events, which can be physical or psychological. This study aimed to identify factors that influence Post-traumatic growth (PTG) in South Korean police officers, according to age group. Methods: Raw data were collected from September 26 to October 9, 2017, for 269 police officers who are employed at 10 police offices in Seoul. PTG was affected significantly by age, marital status, monthly income, and police rank in pain perception and social support variables among general characteristics. Results: Factors that affected PTG in the ‘20~29’ age group were resilience and pain perception, but in the ‘30~39’ age group, only Pain perception was significant, and in the ‘over 50’ age group, social support and pain perception were significant. Conclusions: The development of mental health programs for police should consider the age group of the patients. Mental health care should also be continuous

Musculoskeletal Symptoms among Plantation Workers in Kerala, India

Introduction: Musculoskeletal disorder (MSD) is one of the major occupational health problems worldwide. Musculoskeletal symptoms (MSS) can indicate an underlying MSD. This paper assesses the prevalence of MSS among different plantation workers in Kerala, India. Methods: A cross-sectional survey was conducted from January to February 2021 among 83 rubber tappers, 90 cardamom plantation workers, and 87 tea pluckers (N=260). The Standardized Nordic Questionnaire (SNQ) was used to capture the MSS. MSS was compared across the three types of plantation workers, and the Chi-square test was used to test the significance. The Odds Ratios (OR) and 95% Confidence Intervals (CI) were estimated using binary logistic regression analysis.  Results: The prevalence of MSS (any regions) in the last 12 months among all participants was 87.7% and did not significantly vary between the three groups of workers. In general, the most affected regions were the low back (61%), one or both knees (47%) and shoulders (44%), respectively. Compared to rubber tappers, the odds of MSS in hips/ thighs (adjusted OR=2.38: 95% CI: 1.17-4.84) and wrists (adjusted OR=3.77: 95% CI:1.85-7.69) were significantly high among cardamom plantation workers. But the odds of MSS in elbows (adjusted OR=0.58: 95% CI: 0.31-1.07) and knees (adjusted OR=0.26:95% CI: 0.10-0.63) were low in the tea plantation workers as compared to rubber tappers. Conclusion: Though there was no variation in the overall prevalence of MSS between the three groups, there was a significant variation between the groups regarding the MSS in different body regions. Using supportive aids according to the nature of work and doing simple stretching exercises during breaks may help to improve the musculoskeletal health of plantation workers

Effects of Mercury Concentration on the Health and Safety of Oil and Gas Workers

Introduction: The processing of crude oil is characterized by numerous hazards, which have significant health, safety, and environmental impacts on neighboring communities. The occurrence of mercury and its toxic derivatives is considered one of the many negative impacts of oil and gas operations. However, there is limited research on mercury and its negative effects on workers in the Gulf Cooperation Council (GCC) region. This study examines the occurrence, exposure, and symptoms of mercury on the health and safety of oil and gas workers in Oman. It also explores the acute/chronic effects of mercury poisoning on the maintenance and inspection workers, who are more prone to the adverse effects of mercury poisoning during oil and gas operations. Methods: The two-pronged approach of literature review and survey questionnaire was used to deduce the effects of mercury exposure and poisoning using 68 respondents with 1 – 6 years of working experience in the sector. Results: Based on the questionnaire response rate of 72%, the results showed that over 90% of participants had experienced symptoms of elemental, organic, and methyl mercury poisoning. The common symptoms experienced are headaches, insomnia, weakness, hearing impairment, visual and sensory abilities. However, the respondents who experienced methyl mercury (MeHg) symptoms are due to consuming seafood and cigarettes, whereas elemental and organic mercury symptoms are due to oil and gas operations. Conclusion: The findings highlight the need for robust health and safety measures to effectively detect, monitor and eliminate mercury compounds responsible for poisoning maintenance and inspection workers

Scientific model development for machinery safety using machine reliability, integrity and availability.

Machines are equipment that increases productivity and efficiency in a workplace. Machine Reliability, Integrity, and Availability are the most critical factors to ensure machinery safety in a workplace. Throughout this study, a series of reviews of previous literature are described in relation to the elements of reliability, integrity and availability. This study examines the methods used to investigate levels of each element as well as the results of performing the analysis. Each review is chosen from the aspect of the safety feature that can be interpreted from the research study. A scientific model that utilizes an improved Bottom-up Approach is proposed to further improve the worker's safety and enhance the productivity of an industry. Research shows that the chosen reviews have positive and negative change towards the level of machinery safety and a more substantial approach is needed to further strengthen the issue. The proposed model combines the effort of employee and various management organization as a team. The model is validated using Bias- Variance Trade off method that analyses the proposed model in a 27MW power plant with a selection of employee and management. Model validation proves that the proposed model is an effective method to increase the machinery reliability, integrity and availability in a workplace. The scientific methodology provided will help management as a team to avert mechanical accidents from occurring at an initial stage

Assessment of oral health status and tobacco-related habits among the employees of North-West Karnataka Road Transport Corporation (NWKRTC), Belagavi City - A Cross-Sectional Study

Introduction: Transport workers have a very haphazard and incongruent schedule which makes it difficult for them to follow proper oral hygiene practices. The prevalence of tobacco habits is also found to be high due to their long periods of work and constant stress. This study aimed to assess the oral health status and tobacco habits of the government bus drivers and conductors of NWKRTC, Belagavi City, Karnataka.  Methods: A descriptive cross-sectional study was conducted on 451 Government Bus drivers and other employees of NWKRTC who gave consent for the study. WHO Oral Health Assessment Form 2013 was used to record the oral health status and a self-designed, validated questionnaire was employed for recording the oral hygiene practices and tobacco-related habits. Descriptive statistics and Chi-Square was used for statistical analysis.    Results: The mean age of the employees of NWKRTC is 43.55 years and there are 414 males as compared to only 37 females. The mean DMFT score was 5.55±3.08. 228 of them had some kind of tobacco habit with guthka (25.9 percent) being the most prevalent one. 57 employees had manifestations of leukoplakia and OSMF. There was an association between tobacco habits and oral mucosal lesions as well as the DMFT score. Conclusion: The Oral Health Status of the Government employees of NWKRTC is poor. It is further compounded by the high prevalence of tobacco habits and associated lesions and it is a problem that needs to be addressed immediately