Bisphenol A (2,2-bis(4-hydroxyphenyl)propane, BPA) is widely used as an ingredient in the manufacture of epoxy carbonate, poly carbonate and polyester styrene. Recently, some chemicals which are structurally similar to BPA (BPA related compounds: BPs) are coming to be used and it is reported that they have estrogenic activity on aquatic organisms. In this study, we determined the ability of Portulaca oleracea to remove 6 BPs (BPA,BPB,BPE,BPF,BPP and BPS)from water samples. When the initial BPs concentrations were 1 ppm, these BPs were eliminated in order of BPE > BPF > BPP > BPB > BPA > BPS from the water samples after 48 h. BPE(98.2%) was the highest, and BPS(71.2%) was lowest. At least 2 degradation products were confirmed as degradation products, and they were in order increased with the degradation of BPA.
Nonylphenol (NP) is the typical chemical substance which has an adverse effect on the environment and humans. Branched NP isomers were identified by GC/MS with HP-5MS separation column. A high sensitivity quantitative analysis method was developed by using a selected ion monitoring technique with 6 fragment ions (m/ z: 107, 121, 135, 149, 163, and 220). The detection limit was confirmed at 0.13-0.8 ng/L. The qualitative analysis of NP isomers in the influent water and final effluent of a sewage.treatment plant was operated. 17 kinds of NP isomers were detected in influent water and 11 kinds of NP isomers were detected in the final effluent. The result suggested that 90% of NP isomers were removed by the sewage plant.
In Japan, it has been prohibited to import or manufacture a product that contains asbestos over 0.1% since 2006, except some specified ones by law. However, people are still exposed to asbestos in some facilities, such as an old building with asbestos or a building under renovation. The purpose of this paper is: to introduce a countermeasure we did take against asbestos derived from sprayed-on materials composed of vermiculite, which is widely used in a university, and to propose a method of risk management for asbestos exposure in similar school buildings. It was in 2005 that through an analytical transmission electron microscope an occupational health staff found the sprayed-on material which is a part of our school buildings containing asbestos. Since then, under the discussion in the safety and health committee, the school has carried out steps for complying with stricter legal regulations against abestos and for applying the improved methods to analyze small amount of asbestos in sprayed-on vermiculite. Those countermeasures are as follows: to judge there is asbestos or not with X-ray diffraction technique, to examine how damaged spray-on materials are, to measure how high concentration of asbestos in the air, to determine control-policy in each room, to warn not to use so damaged rooms, and to remove sprayed-on materials from those rooms. Although the countermeasures taken in the school are not sufficient, we suppose that our case study will be helpful for other schools and organizations when they deal with sprayed-on materials made of vermiculite.
Since the university owns various kinds of chemical substances, it complies with the laws and regulations dealing with them. In the last few years, a chemical management support system has started being introduced at the university to deal with them. In this report, we selected four areas concerning regulations to be complied with: "Acquisition and Use", "Management of Usage", "Storage" and "Notice". In addition, we verified whether or not using the system increased efficiency in chemical management. If all chemicals in the university are registered with the chemical management support system, it is possible that the "Acquisition and Use", "Storage" and "Notice" items can be searched using the system. However, in "Management of Usage", there are insufficient parts in the system's aggregate feature. We recognize that the system supports chemical management and we need to continuously operate it. Moreover, by performing "Quantification", which is an aggregate feature of the system, we can understand the condition of compliance in regards to chemicals at the university and, in doing so, advance the state of chemical management at the university. To do this, it is necessary to establish a chemical management support system and to allocate personnel and human resources to operate it.