Precipitation of Goethite by Hydrolysis Reaction in Ferric Sulphate Solutions between 70.DEG.C. and 110.DEG.C..
-
- SASAKI Kin–ichi
- Mining College, Akita University, Akita 010
-
- OOTSUKA Kenji
- NDK Electron Beam Inc.
-
- WATANABE Mitsuru
- Prof. Emeritus of Akita University
-
- TOZAWA Kazuteru
- Prof. Emeritus of Tohoku University
Bibliographic Information
- Other Title
-
- 温度70から110℃における硫酸第二鉄溶液の加水分解によるゲーサイト沈殿
- オンド 70 カラ 110ドC ニ オケル リュウサン ダイ2テツ ヨウエキ
Search this article
Abstract
A hydrolysis reaction was carried out by adding a certain amount of zinc oxide into the sulphuric acid acidified ferric sulphate solutions with various concentrations at 70 °C, 80 °C, 90 °C, 100 °C and 110 °C respectively for more than 168 hours. The composition of solutions and the precipitation of goethite, which were balanced with solutions at an equilibrium state when the hydrolysis reaction proceeded to completion, were examined. It was found that the precipitation of goethite occurred from the region where ferric ion concentration increased slightly with an increase of the sulphuric acid concentration to the region where ferric ion concentration increased suddenly. In the region where goethite was precipitated, the sulphuric acid concentration in the solution increased with raising temperature, e. g. the precipitation of goethite occurred in the solution with the sulphuric acid concentration up to 8.4 g/l at 70 °C, 11.8 g/l at 80 °C, 15.5 g/l at 90 °C, 16.5 g/l at 100 °C, and 21.0 g/l at 110 °C respectively. The ferric ion concentration increased with an increase of the sulphuric acid concentration at the same temperature, and decreased with raising temperature at the same sulphuric acid concentration. A plot of logarithmic value of sulphuric acid concentration against logarithmic value of ferric ion concentration showed a linear relationship which can be expressed by empirical formulas at the individual temperature.
Journal
-
- Shigen-to-Sozai
-
Shigen-to-Sozai 114 (1), 47-56, 1998
The Mining and Materials Processing Institute of Japan
- Tweet
Details 詳細情報について
-
- CRID
- 1390001206015342464
-
- NII Article ID
- 10002467049
-
- NII Book ID
- AN10062646
-
- COI
- 1:CAS:528:DyaK1cXhtlWhtbg%3D
-
- ISSN
- 18806244
- 09161740
-
- NDL BIB ID
- 4403168
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed