| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Real Time Imaging
|
| Presentation Title |
Ca2+ and pH Imaging during Dissolution of CaSiO3 into Aqueous Solution |
| Author(s) |
Sakiko Kawanishi, Hinako Nakayama, Jun Kawano, Takeshi Yoshikawa, Hiroyuki Shibata |
| On-Site Speaker (Planned) |
Sakiko Kawanishi |
| Abstract Scope |
Ca elution from the recycled steelmaking slag for both land and sea area is one of crucial issues because of the excess pH increase in the surrounding environment. However, a precise mechanism of Ca elution and the subsequent pH change has not yet been revealed. To provide a new methodology to access the mechanism, we demonstrated a simultaneous pH and Ca2+ imaging during the dissolution of CaSiO3 into aqueous solution by a fluorescence microscopy. Time revolution of Ca2+ and pH distributions around the CaSiO3 was successfully evaluated in the range of 0 – 40 ppm and 6.5 – 9.5, respectively. The rapid increase of both Ca2+ and pH was observed from the glassy phase compared with the crystalline phases. Details of the real time observation technique and the relationship between Ca2+ and pH will be presented in the symposium. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Recycling and Secondary Recovery, Iron and Steel |