Estimation of Redox Reactions of Deep Groundwaters in Japan

Toshiyuki Hokari

Estimation of Redox Reactions of Deep Groundwaters in Japan

Toshiyuki Hokari * §

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Estimation of Redox Reactions of Deep Groundwaters in Japan

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Abstract

pH and oxidation reduction potential (ORP) values of waters in original positions (insitu) were estimated using analytical data on deep groundwaters and hot spring waters at 67 points in Japan. A predominant redox reaction at each point was thermodynamically analysed on the basis of the Gibbs reaction energy. The results showed that a redox reaction of iron sulphide / sulphate ion was estimated to be predominant at many points, and that in a pH-ORP diagram, most of the in-situ pH and ORP estimates were on an equilibrium curve between pyrite and sulphate ion. It is suggested that the in-situ groundwaters in the Tertiary sedimentary rocks in Japan could be governed with the redox reaction of the iron sulphide / sulphate ion.

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Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

Not applicable for this article.

How to Cite This Article

Toshiyuki Hokari. 2014. "Estimation of Redox Reactions of Deep Groundwaters in Japan". Global Journal of Science Frontier Research - H: Environment & Environmental geology GJSFR-H Volume 14 (GJSFR Volume 14 Issue H3).

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GJSFR Volume 14 Issue H3

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Journal Specifications

Crossref Journal DOI 10.17406/GJSFR

Print ISSN 0975-5896

e-ISSN 2249-4626

Keywords

groundwaters hot spring waters in-situ ORP in-situ pH redox reactions

Classification

GJSFR-H Classification FOR Code: 26050

040699

Submission ReceivedApril 30, 2014
Peer Review Double Blind
Handling Editor
Accepted May 28, 2014
Published June 12, 2014

Version of record

v1.2

Issue date

July 23, 2014

Language

English

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Article Matrices

Total Score: 190

Country: Japan

Subject: Global Journal of Science Frontier Research

Authors: Toshiyuki Hokari (PhD/Dr. count: 0)

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