| Item type |
デフォルトアイテムタイプ（フル）(1) |
| 公開日 |
2008-03-27 |
| タイトル |
|
|
タイトル |
How does pH affect extraction behavior of Cr(III) and Cr(VI)? -True effect of pH on chromium dithiocarbamate extraction systems- |
|
言語 |
en |
| 作成者 |
Honma, Yoshiro
Murakami, Masahiko
Takada, Takeo
Kuniyoshi, Masayuki
国吉, 正之
|
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 主題 |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Solvent extraction |
| 主題 |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
chromium |
| 主題 |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
dithiocarbamate |
| 主題 |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
diisobutyl ketone |
| 主題 |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
pH dependence |
| 内容記述 |
|
|
内容記述タイプ |
Other |
|
内容記述 |
The effect of pH of aqueous phase on the extraction of Cr(III) and Cr(VI) in ammonium 1-pyrrolidinecarbodithioate/diisobutyl ketone (APCD/DIBK) extraction system was studied. In order to avoid side effects such as masking, all of the experiments were carried out in the absence of buffer agent. As first step, manners of pH change that caused from addition of the chelating agent was examined in detail. Then, based on the results of the examination, effect of pH on the chromium extraction was discussed extensively. Both pH conditions before and after APCD addition affected the extraction behavior of chromium. By considering the change of pH in aqueous solution, it was clear that a root of the effect of pH on the extraction of both Cr(III) and Cr(VI) consists in the change of the species of chromium in aqueous phase. In APCD/DIBK extraction system, species that extracted effectively were Cr(H_2O)_5(OH)^<2+> and HCrO^<2->_4. The results of the examination of the pH change caused by chelating agent also clarified a cause of difference in the extractability of two carbodithioate chelating agents; APCD and sodium diethylcarbodithioate (NaDDTC). |
| 内容記述 |
|
|
内容記述タイプ |
Other |
|
内容記述 |
紀要論文 |
| 出版者 |
|
|
出版者 |
琉球大学理学部 |
|
言語 |
ja |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
departmental bulletin paper |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 識別子 |
|
|
識別子 |
http://hdl.handle.net/20.500.12000/5377 |
|
識別子タイプ |
HDL |
| 収録物識別子 |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0286-9640 |
| 収録物識別子 |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AN00250774 |
| 収録物名 |
|
|
収録物名 |
琉球大学理学部紀要 |
|
言語 |
ja |
| 収録物名 |
|
|
収録物名 |
Bulletin of the College of Science. University of the Ryukyus |
|
言語 |
en |
| 書誌情報 |
号 80,
p. 63-79,
発行日 2005-09
|
No80p63.pdf
