The lack of management in laboratory waste room is often overlooked. This may lead to serious incidents or accidents. Mixing of incompatible chemical wastes creates unwanted chemical reactions that produce gases and heat. Severe consequences can arise from such reactions, such as property damage, bodily harm and even life endangerment. Heat produced from the reactions can also affect nearby chemical wastes, causing cascading harm effects. It is thus important to reduce the likelihood of mixing incompatible chemicals. Our continuous improvement efforts include design and organization of laboratory waste rooms, providing safe storage, constant instilling users' mindfulness of chemical safety and implementing chemical safety measures and awareness activities to ensure safe disposal and management of chemical waste.
Because experiments in laboratories often deal with potential sources of danger, safety education plays an important role in preventing accidents. To increase the effectiveness of safety education, it is desirable to explain the mechanism by which each source of danger becomes evident as an accident depending on how the experiment is conducted, using examples of accidents that have actually occurred in the immediate vicinity. It is also important to incorporate experiments using each hazard source as a specific teaching material into the safety education curriculum to provide practical training. In this study, we developed a safety education system for the units of “electricity,” “outdoor activities,” and “lasers,” which consists of the basic knowledge necessary to prevent accidents, mechanisms by which accidents and problems occur, and hands-on learning. One of the unique features of this educational content is that it is based on examples of actual accidents that occur frequently and includes classroom learning on why these accidents occur and what should be known to prevent them and hands-on experience of occurrences that are the essence of the accidents. By incorporating various examples of hazards in each content, theprogram is designed to be widely applicable to diverse research sites. There were 143 participants in the program in 2020, and through this education, they are expected to understand the systematic approach in each topic and learn through the experience of specific and practical educational content. In the future, we plan to further enhance the content to improve the practical skills of the participants and make the teaching materials multilingual in light of the internationalization of the university.
Although accidents involving serious injuries seldom occur during experiments in university laboratories, certain similar types of minor incidents occur repeatedly. Applying conventional Risk Assessment (RA) methods developed for routine industry research activities (undertaken at the same time and place) to university laboratories is difficult because university research typically involves multiple experimenters performing non-routine work on different research subjects. In this study, in order to develop new RA methods suitable for experimental work in university laboratories, we focused on the “inventory sheets” that record the number of experimental instrument replenishments undertaken during experiments, and analyzed the relationship between the frequency of non-injury incidents and experimental works. These results are expected to contribute as quantitative information for not only actual experimental operations but also the development of probabilistic risk evaluation for hand work in university laboratories.
The MPs pollutions in the surface water of the entire Citarum River, which plays a vital role in riparian people in West Java, Indonesia, were firstly studied with an FT-IR microscope for the shape, size and polymer type of MPs. The MPs were collected in the wet season (St.1-6 in Mar. 2018, St.3-5, 3-a in Jan. 2020). Results showed that the MPs numbers decreased in 2020 due to the rainy events, the mean of 4.2 ± 2.6 (n = 6), and 2.8 ± 5.5 (n = 4) particles/20 mL in 2018 and 2020. Notably, the tributary recorded the highest MPs abundance in 2020 with unknown pollutant sources. The upper area (Wagisagara, St.1) was anticipated pristine water, but the MPs pollution was shown, and the alkyd resin and PET were found in this area, unlike other stations in 2018. The Koyod (St.2), which had intensive textile industries, revealed high MPs pollution with a fiber in the 1000-5000 μm group. Additionally, the central part (Cisirung, St.3) of vast Bandung city showed heavy MPs pollution in 2018. The bioaccumulation of fishes inhabiting this river due to dominant PP (61%) and PE (17%) was concerned. Comparison with other studies indicated inadequate wastewater treatment systems affected the MPs abundance in this basin. In conclusion, a wide range of MPs abundances in the Citarum River Basin was caused by the daily precipitation and the local different pollutant sources.
To consider the sites of experimental research at universities, it is an important proposition to design rationally while ensuring work efficiency and safety. In this study, we performed flow line analysis with the application of a simulation created based on the results of subject experiment to obtain basic knowledge for rational laboratory planning. From the subject experiments, the probabilities of route selection were obtained, and the effects of human presence and aisle width on route selection were also quantitatively analyzed.
Based on the results of these experiments, a simulation was established to reproduce the flow lines in the laboratory, and the effects of the number of people in the laboratory, the location of work and common areas, and the width and location of narrowed aisles on the frequency of human contact between experimenters were discussed. The obtained results are expected not only to provide suggestive insights for ergonomic planning laboratories with high work efficiency but also to contribute for preventing unintentional exposure to chemicals and viral infections caused by human movement.