比内緑色凝灰岩の pH 調整作用と微生物活性化効果に関する検討

Translated title of the contribution: The abilities of Hinai-Green Tuff to adjust pH and activate microorganisms

Yuichi Sugai, Kyuro Sasaki, Osamu Matsubaya, Hideo Naka, Fujio Tanaka

Research output: Contribution to journalArticle

Abstract

The green tuff from Hinai town, Akita is popular for architectural materials because of its beautiful pale green color and thermal and moisture retaining properties. When this stone is quarried and grinded for making products, approximately 60% of all quarried stone becomes the waste stone and it is required to be utilized effectively. Hinai-Green tuff is a porous media and it has abilities to neutralize acids and elute some minerals. These abilities may be effective for growth of microbes and our research group carries out the development of effective utilizations of Hinai-Green tuff as microbial activator. In this paper, the effects of Hinai-Green tuff on pH adjustment and microbial activities are described.
Hinai-Green tuff had an ability to neutralize both acid and alkaline water and especially neutralized acids effectivelly. For example, acid water of initial pH3 was neutralized to pH7 by adding 10(w/v)% Hinai-Green tuff into the acid water. Therefore, Hinai-Green tuff can neutralize acid soil and water and adjust acid environments to adaptable environments for microbes. Moreover, Hinai-Green tuff could buffer decrease in pH. The pH of water containing Hinai-Green tuff did not decrease rapidly with adding drops of 0.1M HCl, and especially the buffer action was strongly observed at pH 7 to 8. Hinai-Green tuff is very helpful to maintain pH appropriate for microbes for long time against decrease in pH caused by acid rain and/or acid metabolites of microbes. And pH adjustment effects of Hinai-Green tuff were caused by the ion exchange between Ca2+ leached from the stone and H+.
Consequently, microbes grew actively in a medium containing Hinai-Green tuff because of its pH adjustment effects. However, microbes did not grow in a medium containing natural zeolite from Futatsui town, Akita. The effects of Futatsui-Zeolite on pH adjustment for acid were low compared with Hinai-Green tuff.
Original languageJapanese
Pages (from-to)513-520
Number of pages8
JournalShigen to sozai
Volume121
Issue number10,11
DOIs
Publication statusPublished - Nov 2005

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tuff
Microorganisms
microorganism
Acids
acid water
Water
pH effects
Zeolites
acid
Buffers
Acid Rain
zeolite
Acid rain
Metabolites
alkaline water
Minerals
Porous materials
Ion exchange
Moisture
acid rain

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Materials Science(all)
  • Earth and Planetary Sciences(all)

Cite this

比内緑色凝灰岩の pH 調整作用と微生物活性化効果に関する検討. / Sugai, Yuichi; Sasaki, Kyuro; Matsubaya, Osamu; Naka, Hideo; Tanaka, Fujio.

In: Shigen to sozai, Vol. 121, No. 10,11, 11.2005, p. 513-520.

Research output: Contribution to journalArticle

Sugai, Yuichi ; Sasaki, Kyuro ; Matsubaya, Osamu ; Naka, Hideo ; Tanaka, Fujio. / 比内緑色凝灰岩の pH 調整作用と微生物活性化効果に関する検討. In: Shigen to sozai. 2005 ; Vol. 121, No. 10,11. pp. 513-520.
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abstract = "The green tuff from Hinai town, Akita is popular for architectural materials because of its beautiful pale green color and thermal and moisture retaining properties. When this stone is quarried and grinded for making products, approximately 60{\%} of all quarried stone becomes the waste stone and it is required to be utilized effectively. Hinai-Green tuff is a porous media and it has abilities to neutralize acids and elute some minerals. These abilities may be effective for growth of microbes and our research group carries out the development of effective utilizations of Hinai-Green tuff as microbial activator. In this paper, the effects of Hinai-Green tuff on pH adjustment and microbial activities are described.Hinai-Green tuff had an ability to neutralize both acid and alkaline water and especially neutralized acids effectivelly. For example, acid water of initial pH3 was neutralized to pH7 by adding 10(w/v){\%} Hinai-Green tuff into the acid water. Therefore, Hinai-Green tuff can neutralize acid soil and water and adjust acid environments to adaptable environments for microbes. Moreover, Hinai-Green tuff could buffer decrease in pH. The pH of water containing Hinai-Green tuff did not decrease rapidly with adding drops of 0.1M HCl, and especially the buffer action was strongly observed at pH 7 to 8. Hinai-Green tuff is very helpful to maintain pH appropriate for microbes for long time against decrease in pH caused by acid rain and/or acid metabolites of microbes. And pH adjustment effects of Hinai-Green tuff were caused by the ion exchange between Ca2+ leached from the stone and H+.Consequently, microbes grew actively in a medium containing Hinai-Green tuff because of its pH adjustment effects. However, microbes did not grow in a medium containing natural zeolite from Futatsui town, Akita. The effects of Futatsui-Zeolite on pH adjustment for acid were low compared with Hinai-Green tuff.",
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