Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Wataru HAREYAMA"'
Autor:
Wataru HAREYAMA, Taku NOZAWA
Publikováno v:
Journal of MMIJ, Vol 140, Iss 5, Pp 20-25 (2024)
Fluoride(F-) is present in wastewater produced by various industries, such as semiconductor, glass processing, mining and smelting. Development of high-efficient and low-cost treatment processes of wastewater is desirable. In this study, Seashells so
Externí odkaz:
https://doaj.org/article/58c6bd4943374052b4acc70284e0b831
Publikováno v:
Hydrometallurgy. 163:69-76
It is well known that galvanic interactions between sphalerite or pyrite and manganese (IV) oxide(MnO2) accelerate the leaching of these minerals. Because MnO2 is nobler than chalcopyrite, chalcopyrite acts as cathode to be oxidized in contact with M
Autor:
Hiroshi Nakazawa, Wataru Hareyama
Publikováno v:
RESOURCES PROCESSING. 63:3-11
Publikováno v:
Resources Processing. 60:174-180
Publikováno v:
Resources Processing. 58:47-51
About 800,000 tones of wastes have been piled up or buried illegally at prefectural boundary area between Aomori and Iwate prefectures. Over 200 drums that contained organic solvent were buried and the solvent leaked from the drums resulting into the
Publikováno v:
Journal of MMIJ. 127:643-648
Publikováno v:
Journal of MMIJ. 126:679-683
Cobalt-rich ferromanganese crusts (cobalt crust) contain strategic metals such as copper, nickel and cobalt. In order to recover cobalt, the reduction and dissolution of manganese oxide in crusts is required because cobalt is interlocked in manganese
Publikováno v:
Journal of MMIJ. 125:43-48
In order to recover copper from waste printed wiring boards which were free of mounted parts, bioleaching experiments of the boards were carried out using Acidithiobacillus ferrooxidans in shaking flasks. The size fraction and the copper content of t
Autor:
Hiroshi Nakazawa, Wataru Hareyama
Publikováno v:
Resources Processing. 54:182-186
Arsenic occurs mostly as arsenite (As (III)) or arsenate (As (V)) in natural water. As(III) is more difficult to be remove than As(V), and it is necessary to oxidize As(III) to As(V) for effective removal. Arsenite-oxidizing population, named IWAS, w
Publikováno v:
Journal of MMIJ. 123:117-122
Chlorinated organic compounds such as trichloroethene (TCE) have caused soil and ground water pollution on a lot of sites. Oxidation processes which are produced hydroxyl radical are effective to remediate these contaminated sites, because they are a