Effects of pH and Operational Conditions on Silica Removal from Geothermal Brine by Seeding Method Using Silica Gel.

• SUGITA HAJIME

  Department of Chemical Engineering, Nagoya University

• BANDO YOSHIYUKI

  Department of Chemical Engineering, Nagoya University

• NAKAMURA MASAAKI

  Department of Chemical Engineering, Nagoya University

Bibliographic Information

Other Title

• シリカゲルシード添加法による地熱水からのシリカ除去に及ぼすｐＨおよび操作条件の影響
• シリカゲルシード テンカホウ ニ ヨル チネツスイ カラ ノ シリカ ジョキョ

Abstract

For the seeding method by using silica gel, the effects of pH and operational conditions on the silica removal performance are experimentally investigated. The silica removal ratio is estimated by the quasi-stable concentration of silica measured under various conditions.<BR>The initial pH was changed in the range of 5-9. When the initial silica concentration is 0.5 kg-SiO₂·m^-3, the silica removal ratio increases with increasing initial pH. The silica removal ratio has a maximum and a minimum when the initial silica concentration is 0.7 kg-SiO₂·m^-3, and has a minimum when the initial silica concentration is 0.9 kg-SiO₂·m^-3. When the initial pH is the same, the silica removal ratio increases with increasing temperature and with decreasing initial silica concentration. While the silica removal ratio is not affected by the pre-seeding time in the case of lower initial silica concentrations, it increases with decreasing pre-seeding time in the case of higher initial silica concentrations. The seeding method is considered to be applicable to treat the present geothermal brine.

Journal

• KAGAKU KOGAKU RONBUNSHU

  KAGAKU KOGAKU RONBUNSHU 24 (4), 552-557, 1998

  The Society of Chemical Engineers, Japan

Keywords

• precipitation
• initial pH
• seeding method
• silica gel seed
• silica scale

Details

• CRID: 1390001204509775872
• NII Article ID: 10002835600
• NII Book ID: AN00037234
• DOI: 10.1252/kakoronbunshu.24.552
• COI: 1:CAS:528:DyaK1cXks1CnurY%3D
• ISSN: 13499203
• ISSN: 0386216X
• ISSN: http://id.crossref.org/issn/0386216X
• NDL BIB ID: 4507324
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4507324
• Web Site: http://www.jstage.jst.go.jp/article/kakoronbunshu1975/24/4/24_4_552/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed