排序方式: 共有55条查询结果,搜索用时 15 毫秒
31.
Tomohito Kameda Shoko Fukushima Chisato Shoji Guido Grause Toshiaki Yoshioka 《Journal of Material Cycles and Waste Management》2013,15(1):111-114
A new concept for the recycling of poly(vinyl chloride) (PVC) has been introduced, including the dehydrochlorination of PVC in ethylene glycol (EG) with NaOH as a reactant, the subsequent separation of NaCl from EG by electrodialysis, and the recovery of chlorine for the synthesis of new PVC. In this work, the separation of NaCl by electrodialysis was investigated. About 98 % of the salt were recovered from EG, with less than 10 % of the EG permeating the membranes after 5 h. 相似文献
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Kumar Harendra Kumagai Shogo Kameda Tomohito Saito Yuko Yoshioka Toshiaki 《Journal of Material Cycles and Waste Management》2021,23(2):461-469
Journal of Material Cycles and Waste Management - In this study, we developed a one-pot wet ball-milling method for the recovery of highly pure copper wire, poly(vinyl chloride) (PVC) coating, and... 相似文献
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Kumagai Shogo Hirahashi Suguru Grause Guido Kameda Tomohito Toyoda Hiroshi Yoshioka Toshiaki 《Journal of Material Cycles and Waste Management》2018,20(1):439-449
Journal of Material Cycles and Waste Management - Polyvinyl chloride (PVC)-coated poly(ethylene terephthalate) (PET) woven fibers are one of the hardest-to-recycle polymeric materials. Herein we... 相似文献
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Kumagai Shogo Grause Guido Kameda Tomohito Yoshioka Toshiaki 《Journal of Material Cycles and Waste Management》2017,19(1):282-293
Journal of Material Cycles and Waste Management - Recycling of printed circuit boards (PCBs) is complicated by the presence of flame retardants containing halogen and phosphorus, as the degradation... 相似文献
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Detection of Asian dust aerosols using meteorological satellite data and suspended particulate matter concentrations 总被引:1,自引:0,他引:1
Naoko Iino Kisei Kinoshita Andrew C. Tupper Toshiaki Yano 《Atmospheric environment (Oxford, England : 1994)》2004,38(40):6999-7008
The advection and dispersion of Asian dust events from China to the Pacific Ocean around Japan during 2000–2002 were investigated using the meteorological satellite data of NOAA/AVHRR and GMS-5/VISSR. Aerosol vapour index images, taking the brightness temperature difference between 11 and 12 μm, are very effective for monitoring the Asian dust phenomenon in the East Asia region, with their capacity for detection during the day or night. We discuss the dust events, focusing on the advection patterns shown in satellite images, which are classified into three types as ‘dry slot’, ‘high-pressure wedge’ and ‘travelling high’, based on synoptic patterns. The results are compared with suspended particulate matter concentrations measured at Japanese surface stations and with ground-based observations of Sakurajima volcano by a web camera system at Kagoshima in Kyushu, Japan. We found that the passage of cold fronts caused a rapid increase of suspended particulate matter (SPM) concentrations, which exceeded 100 μg m−3, and that deep low-pressure complexes strengthened the dust phenomenon. The ‘high-pressure wedge’ type is seen much more clearly in satellite images than the ‘travelling high’ type, but SPM concentrations and visibility were similar in both owing to the differences in the vertical distribution of the dust and in viewing conditions. 相似文献
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In this study, potassium iodide (KI) was found to be capable of reducing selenium(VI) to selenium(IV). When KI was added to
Se(VI) solution, the Se(VI) concentration rapidly decreased with an increase in the KI/Se(VI) molar ratio. By using the potential-pH
equilibrium diagram for the selenium/water system, we confirmed that Se(VI) reduced to Se(IV) because the potential of the
solution shifted to the stable Se(IV) region upon the addition of KI. This reduction accompanies the oxidation of I− to I3−. The reduction of Se(VI) by KI was found to be effective for concentrated Se(VI) solutions. 相似文献
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Toshiaki Hayashi Tai Gyu Lee Melynda Hazelwood Elizabeth Hedrick Pratim Biswas 《Journal of the Air & Waste Management Association (1995)》2013,63(6):922-929
ABSTRACT The use of activated carbon fiber (ACF) filters for the capture of particulate matter and elemental Hg is demonstrated. The pressure drop and particle collection efficiency characteristics of the ACF filters were established at two different face velocities and for two different aerosols: spherical NaCl and combustion-generated silica particles. The clean ACF filter specific resistance was 153 kg m-2 sec-1. The experimental specific resistance for cake filtration was 1.6 × 106 sec-1 and 2.4 × 105 sec-1 for 0.5- and 1.5-μm mass median diameter particles, respectively. The resistance factor R was approximately 2, similar to that for the high-efficiency particulate air filters. There was a discrepancy in the measured particle collection efficiencies and those predicted by theory. The use of the ACF filter for elemental Hg capture was illustrated, and the breakthrough characteristic was established. The capacity of the ACF filter for Hg capture was similar to other powdered activated carbons. 相似文献
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Comparative survey of levels of chlorinated cyclodiene pesticides in breast milk from some cities of China, Korea and Japan 总被引:2,自引:0,他引:2
Exposure of mothers to organochlorine pesticides (OCPs) was assessed by measuring the levels of 20 OCPs in 70 human breast milk samples pooled from 210 individuals from China, Korea and Japan. The OCPs were analyzed using gas chromatography/mass spectrometry (GC/MS) in electron capture negative ionization (ECNI) monitoring. The results showed that β-hexachlorocyclohexane and hexachlorobenzene were one order of magnitude higher in China than in the other nations, whereas chlordanes and polychlorinated biphenyl levels were highest in Japan. Heptachlor epoxide, dieldrin, endrin, toxaphenes and mirex were detected in most samples, and levels of these chemicals were significantly higher in Japan (0.8-4.5 ng g−1 lipid), followed by Korea (0.2-4.7 ng g−1 lipid), and lowest in China (less than 1.0 ng g−1 lipid). α- and β-endosulfans were detected at a range of 0.9-1.5 ng g−1 lipid levels in all samples analyzed, and their levels were higher in Korean than in Chinese samples. 相似文献
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