JPS5681443A - Detecting method for rate of transformation reaction into ferrite - Google Patents
Detecting method for rate of transformation reaction into ferriteInfo
- Publication number
- JPS5681443A JPS5681443A JP15894579A JP15894579A JPS5681443A JP S5681443 A JPS5681443 A JP S5681443A JP 15894579 A JP15894579 A JP 15894579A JP 15894579 A JP15894579 A JP 15894579A JP S5681443 A JPS5681443 A JP S5681443A
- Authority
- JP
- Japan
- Prior art keywords
- reaction
- ferrite
- titration
- electroconductivity
- points
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
PURPOSE: To eliminate the danger of flowing-out of unreacting heavy metals and avoid the wastefulness in processing by a method wherein the electroconductivity of a part of the ferrite-reaction liquid of waste water including heavy metals is measured through titration by acid and the reaction ratio of transformation into ferrite is detected by the difference in the amount of titration between two bending points of the curve of titration.
CONSTITUTION: Ferrous sulfate is added to the waste water including heavy metal ions, the water is neutralized by NaOH to produce a complex compound of the heavy metals and Fe, and the precipitation treatment is applied thereto as the ferrite of spinel structure by supplying O2 thereto. On the occasion, a part of the reaction liquid is put in a beaker 3 immersed in the water 2 in a water tank 1 and is titrated with 1n HCl 8 by using a device equipped with a magnetic stirrer rotor 5, a thermometer 6 and an electroconductivity sensor 7, through which the electroconductivity is measured by an conductivity meter 10. Before the completion of reaction, the curve of titration of the electroconductivity of the reaction liquid has the two inflection points, and although the difference between these points is large, it becomes little with the progress of reaction and the points turn into one at the time when the reaction is completed. Accordingly, the completion of the reaction is foreseen with ease and thus complete treatment can be performed without wasteful blasting of air and the loss of time.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15894579A JPS5681443A (en) | 1979-12-07 | 1979-12-07 | Detecting method for rate of transformation reaction into ferrite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15894579A JPS5681443A (en) | 1979-12-07 | 1979-12-07 | Detecting method for rate of transformation reaction into ferrite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5681443A true JPS5681443A (en) | 1981-07-03 |
| JPS612901B2 JPS612901B2 (en) | 1986-01-28 |
Family
ID=15682760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15894579A Granted JPS5681443A (en) | 1979-12-07 | 1979-12-07 | Detecting method for rate of transformation reaction into ferrite |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5681443A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0433462A4 (en) * | 1989-06-16 | 1992-05-06 | Mitsui Toatsu Chemicals, Inc. | Automatic analyzing method and device |
-
1979
- 1979-12-07 JP JP15894579A patent/JPS5681443A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS612901B2 (en) | 1986-01-28 |
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