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31.
Dechlorination/hydrogenation and destruction reactions of PCDDs in OCDD-added fly ash heated under vacuum 总被引:2,自引:0,他引:2
Octachlorodibenzo-p-dioxin (OCDD)-added, pretreated fly ash was heated under vacuum at sample temperatures ranging from T(s)=450 to 650 K. The fly ash and liquid nitrogen-cooled trap samples were analyzed for DD/DF through OCDD/DF. The total amounts of DD through OCDD decrease with increasing T(s), which indicates that dechlorination/hydrogenation (DCH) reactions are not the only reaction channels. Reduction of toxic equivalent (TEQ) for PCDDs by more than 99% was achieved in the fly ash by the vacuum heat treatment at T(s)=650 K for 4 h. The total amount of PCDDs and DD detected in the liquid nitrogen-cooled trap relative to that of added OCDD was about 17%, i.e., PCDDs and DD which were adsorbed to the fly ash surfaces can evaporate into the gaseous phase. The difference between the evaporation behavior of PCDDs in the present and the previous studies is discussed in the light of their states of existence. 相似文献
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A. Ushiyama H. Masuda S. Hirota K. Wake H. Kawai S. Watanabe M. Taki C. Ohkubo 《The Environmentalist》2007,27(4):489-492
Concerns on health effects of radiofrequency (RF) signals have been discussed. Particularly, the effect on the central nerve
system is one of main interest among the general public. So far, there are lots of studies regarding the RF effect on the
Blood Brain Barrier (BBB), but no study of the RF effect on the Blood Cerebrospinal fluid Barrier (BCB). In this study we
explored the effect on BCB function by radiofrequency electromagnetic fields (RF-EMF) exposure. To attain this purpose, we
set about to make a real-time measuring system for BCB function using a micro-perfusion method and examined the short time
exposure experiment using rats. Our data suggested the 30 min single exposure of 1.5 GHz RF-EMF at the brain average SARs
of 9.5 W/kg for adult and 10.4 W/kg for juvenile, did not affect BCB function in rats under the experimental conditions. 相似文献
34.
Inaba Rokuta Tasaki Tomohiro Kawai Kosuke Nakanishi Shotaro Yokoo Yusuke Takagi Shigesada 《Journal of Material Cycles and Waste Management》2022,24(1):155-165
Journal of Material Cycles and Waste Management - Japan has been promoting 3R (reduce, reuse, and recycle) policies for several decades, but the recycling rate of the whole country has leveled off,... 相似文献