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Kubota, Tomohiro; Kuroda, Hisao*; Watanabe, Mirai*; Takahashi, Akiko*; Nakazato, Ryoji*; Tarui, Mika*; Matsumoto, Shunichi*; Nakagawa, Keita*; Numata, Yasuko*; Ouchi, Takao*; et al.
Atmospheric Environment, 243, p.117856_1 - 117856_9, 2020/12
Times Cited Count:3 Percentile:14.62(Environmental Sciences)The dry and wet depositions of atmospheric ammonia (NH) is one of the important pathways of nitrogen loads to aquatic ecosystems. Crop and livestock agriculture, one of the largest emitters of NH in Asian countries, are known to cause high spatial and seasonal variation of NH and influence the surrounding lake basin areas via its dry and wet deposition. However, the spatial characteristics of the NH concentration in basin scale are not completely understood for regulation in NH emission. Here we aim to clarify dominant factors of spatial and seasonal variations of the NH concentration in a eutrophic lake basin surrounded by agricultural areas in Japan. Passive sampling over various land use categories in the basin was conducted at 36 sites in total from October 2018 to January 2020. Interestingly, the observed NH concentration near the livestock houses were higher in winter than summer, which was inconsistent with knowledge of seasonal changes of current NH emission inventory based on temperature-driven volatilization process. Comparing monthly NH concentrations with various meteorological factors, we suggested the importance of seasonal advection of NH from high emission sources to which has been rarely paid attention by the previous past studies. As for this, should be considered for lake ecosystem management since deposition of NH is known to be closely related to the ecological processes such as phytoplankton blooming.
Li, Z.*; He, T.*; Matsumura, Daiju; Miao, S.*; Wu, A.*; Liu, L.*; Wu, G.*; Chen, P.*
ACS Catalysis, 7(10), p.6762 - 6769, 2017/10
Times Cited Count:160 Percentile:96.59(Chemistry, Physical)Akagi, Hiroshi; Yokoyama, Keiichi; Yokoyama, Atsushi
Journal of Chemical Physics, 120(10), p.4696 - 4704, 2004/03
Times Cited Count:19 Percentile:52.8(Chemistry, Physical)no abstracts in English
Ueta, Shinzo*; *; *; *
JNC TJ8400 2000-002, 364 Pages, 2000/02
Japan Nuclear Cycle Development Institute (JNC) have been setting migration parameters and developing its database for the 2nd Progress Report of HLW Geological Disposal (H12 Report). In this study, experimentswere carried out to certify the reliability of parameters and scenario, and examination was carried out to survey procedures of quality management. The main contents are as follows. (1)Data acquisition for certification of migration parameters. The effect of NH complex of Pd on distribution coefficients (Kd) of Pd on both bentonite and rocks, and the effect of sulfate and carbonate complexes of Am on Kds of Am on bentonite are investigated. Kds of Pd depended on NH concentration in aqueous. The dependence varied with pH. Effects of sulfate and carbonate complexes on Kds of Am were not remarkable. Apparent diffusivities of Cs in bentonite saturated by saline water were measured. It was confirmed that the apparent diffusivities of Cs in saline water were similar to those in pure water. (2)Evaluation of colloidal effect on nuclide migration. An evaluation of validity of analytical model (Hwang's model) for nuclide migration under existence of colloids and investigation of characterization of colloids in groundwater were carried out. As the results, it was indicated that the Hwang's model was appropriate, and it was found that samplingtechnique influenced concentration and size distribution of colloids. (3)Influence of organic substances on solubility. Solubility of Th was measured under the condition with humic acid and carbonate. It increased roughly in proportion to the concentration of humic acid. And it was remarkably high under the condition with carbonate. It was confirmed that Th solubility data set in H12 report was conservative, even though humic acid existed in groundwater. (4)Use of Mechanistic Models for Safety Assessment. The integrated sorption/diffusion model has been used to calculate K, D and D values ...
Inaba, Yoshitomo; Fumizawa, Motoo; Tonogochi, Makoto*; Takenaka, Yutaka*
Enerugi, Shigen, 19(6), p.558 - 563, 1998/11
no abstracts in English
Hirota, Koichi; J.Maekelae*; Tokunaga, Okihiro
Industrial & Engineering Chemistry Research, 35(10), p.3362 - 3368, 1996/00
Times Cited Count:17 Percentile:72.39(Engineering, Chemical)no abstracts in English
*; Seguchi, Tadao; Okamura, K.*
Kagaku To Kogyo, 49(9), p.1256 - 1258, 1996/00
no abstracts in English
*; *; Kasai, Noboru; Seguchi, Tadao; Okamura, K.*
High-Temperature Ceramic-Matrix Composites II (HT-CMC2), 0, p.281 - 286, 1995/00
no abstracts in English
Onishi, Kazunori*; Takahashi, Yoshihiro*; Imaki, Shunsaku*; *; Yoshikawa, Masahito
Proc. of 21st Int. Symp. for Testing and Failure Analysis (ISTFA 95), 0, p.269 - 274, 1995/00
no abstracts in English
Matsuda, Koji; *; *; *; Hatada, Motoyoshi
Applied Radiation and Isotopes, 41(8), p.757 - 761, 1990/08
no abstracts in English
Namba, Hideki; Suzuki, Nobutake; Tokunaga, Okihiro
JAERI-M 89-177, 18 Pages, 1989/11
no abstracts in English
;
Journal of Nuclear Science and Technology, 24(9), p.748 - 758, 1987/09
Times Cited Count:8 Percentile:63.44(Nuclear Science & Technology)no abstracts in English
; ; ; Kawakami, Waichiro
JAERI-M 85-098, 13 Pages, 1985/07
no abstracts in English
; *; *;
Int.J.Appl.Radiat.Isot., 32, p.567 - 572, 1981/00
Times Cited Count:5 Percentile:58.04(Nuclear Science & Technology)no abstracts in English
; *
Journal of Nuclear Science and Technology, 17(1), p.57 - 66, 1980/00
Times Cited Count:6 Percentile:58.2(Nuclear Science & Technology)no abstracts in English
Morita, Yosuke; ; ;
J.Appl.Polym.Sci., 23(11), p.3411 - 3420, 1979/00
Times Cited Count:1no abstracts in English
; ; ; Machi, Sueo;
Journal of Nuclear Science and Technology, 16(12), p.907 - 912, 1979/00
Times Cited Count:7no abstracts in English
;
Journal of the Physical Society of Japan, 45(2), p.711 - 712, 1978/02
Times Cited Count:35no abstracts in English
; ; ; Machi, Sueo;
Radiation Physics and Chemistry, 11, p.299 - 303, 1978/00
no abstracts in English
; Tagawa, Hiroaki
Journal of Nuclear Materials, 71(1), p.65 - 72, 1977/01
Times Cited Count:31no abstracts in English