Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Keishi OYAMA"'
Autor:
Mauricio Córdova-Udaeta, Bowen Cheng, Shigeshi Fuchida, Yutaro Takaya, Keishi Oyama, Chiharu Tokoro
Publikováno v:
Journal of Chemical Engineering of Japan, Vol 57, Iss 1 (2024)
Manganese (Mn2+) oxidation is an important phenomena in environmental and industrial processes. This study aims to shed light on the mechanism by which NaClO oxidizes Mn2+ to precipitate MnO2 in the presence of HCl. Experiments at pH = 1.5 indicated
Externí odkaz:
https://doaj.org/article/30f3c8bfae1c4e38967883c28449f70a
Autor:
Takuya TATSUMOTO, Yuki TSUNAZAWA, Taketoshi KOITA, Yutaro TAKAYA, Keishi OYAMA, Chiharu TOKORO
Publikováno v:
Journal of MMIJ, Vol 139, Iss 11_12, Pp 52-62 (2023)
To clarify the mechanism of liberation in the comminution process of electronic scrap (e-scrap), we attempted to express the degree of liberation by first-order kinetic equation related to impact energy. Breakage energy measurements, comminution expe
Externí odkaz:
https://doaj.org/article/b9cb8ef1e1a94b6398e6602526001e46
Autor:
Chiharu Tokoro, Yuto Imaizumi, Taketoshi Koita, Akiko Kubota, Yutaro Takaya, Keishi Oyama, Rahman, Md. Mijanur
Publikováno v:
Materials Transactions; 2024, Vol. 65 Issue 8, p961-968, 8p
Autor:
Hisanori Iwai, Shun Ishii, Keishi Oyama, Shigeshi Fuchida, Naoki Yokota, Yuko Takahashi, Chiharu Tokoro
Publikováno v:
Journal of the Society of Powder Technology, Japan; 2023, Vol. 60 Issue 10, p600-606, 7p
Autor:
Hajime MIKI, Naoko OKIBE, Gde Pandhe Wisnu SUYANTARA, Keishi OYAMA, Keiko SASAKI, Tsuyoshi HIRAJIMA, Takeshi NAKAMURA, Yuji AOKI, Yoshiyuki TANAKA, Takahiro SUWA
Publikováno v:
Resources Processing. 68:124-131
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2cddc6add1495ff8a3c8a5e689c89056
https://doi.org/10.4144/rpsj.68.124
https://doi.org/10.4144/rpsj.68.124
Autor:
Juan Qin, Yeting Fang, Jian Shi, Chiharu Tokoro, Mauricio Córdova-Udaeta, Keishi Oyama, Juncheng Zhang
Publikováno v:
International Journal of Environmental Research and Public Health; Volume 20; Issue 6; Pages: 5042
Ciprofloxacin (CIP), a compound with bioaccumulation toxicity and antibiotic resistance, is frequently detected in water at alarming concentrations, which is becoming an increasing concern. In this study, a low-cost ceramsite was developed from indus
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aab19462e3f3d264574d082893409b00
Autor:
Keishi Oyama, Kentaro Hayashi, Yusei Masaki, Takaya Hamai, Shigeshi Fuchida, Yutaro Takaya, Chiharu Tokoro
Publikováno v:
Materials
Volume 16
Issue 3
Pages: 928
Volume 16
Issue 3
Pages: 928
A passive treatment process using sulfate-reducing bacteria (SRB) is known to be effective in removing heavy metals from acid mine drainage (AMD), though there has been little discussion of the mechanism involved to date. In this work, a sulfate-redu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15baa5b43d9f07570768c309d5a5aced
Autor:
Hirajima, Naoko Okibe, Kaito Hayashi, Keishi Oyama, Kazuhiko Shimada, Yuji Aoki, Takahiro Suwa, Tsuyoshi
Publikováno v:
Minerals; Volume 12; Issue 4; Pages: 449
Bioleaching of arsenic (As)-rich, so-called “dirty” concentrates can produce additional Cu value from the flotation waste while simultaneously releasing toxic As. This study bioleached three such concentrates of varying pyrite/enargite ratios ([P
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=multidiscipl::d5b1eb8be57339073f3cc53eb63398cd
Autor:
Keishi Oyama
Publikováno v:
Evergreen. 7(2):195-201
Chile and Indonesia, as a mining-developed country and a mining-developing country, respectively, are compared to estimate the future applicability of bioleaching technique into real operation. Chilean copper industry has improved via the following s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::884859dd589400f025471e298443562b
http://hdl.handle.net/2324/4055216
http://hdl.handle.net/2324/4055216
Publikováno v:
Materials
Volume 16
Issue 3
Pages: 1314
Volume 16
Issue 3
Pages: 1314
Cadmium (Cd), as a type of heavy metal, can increase the incidence of many diseases, even in low concentrations. In this study, tobermorite was hydrothermally synthesized and then applied to adsorb Cd2+ from an aqueous solution. The physicochemical c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1e22790a7062dc088095ae496f395724
https://doi.org/10.3390/ma16031314
https://doi.org/10.3390/ma16031314