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Clarify on the formation mechanism of arsenic contaminated groundwater in the alluvial plain of Bangladesh

Research Project

Project/Area Number 15403017
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section海外学術
Research Field Geochemistry/Astrochemistry
Research InstitutionOsaka City University

Principal Investigator

MITAMURA Muneki (2004-2006)  Osaka City University, Graduate School of Science, Assosiate Professor, 大学院理学研究科, 助教授 (00183632)

中屋 晴恵 (益田 晴恵) (2003)  大阪市立大学, 大学院・理学研究科, 助教授 (70183944)

Co-Investigator(Kenkyū-buntansha) MASUDA Harue  Osaka City University, Graduate School of Science, Assosiate Professor, 大学院理学研究科, 助教授 (70183944)
AKAI Junji  Niigata University, Faculty of Science, Professor, 理学部, 教授 (30101059)
CHIBA Hitoshi  Okayama University, Faculty of Science, Professor, 理学部, 教授 (30144736)
NAKAYA Shinji  Shinshu University, Faculty of Science, Assosiate Professor, 工学部, 助教授 (70313830)
奥平 敬元  大阪市立大学, 大学院・理学研究科, 講師 (20295679)
前島 渉  大阪市立大学, 大学院・理学研究科, 教授 (20173700)
三田村 宗樹  大阪市立大学, 大学院・理学研究科, 助教授 (00183632)
Project Period (FY) 2003 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥14,900,000 (Direct Cost: ¥14,900,000)
Fiscal Year 2006: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2005: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 2004: ¥8,900,000 (Direct Cost: ¥8,900,000)
Fiscal Year 2003: ¥2,800,000 (Direct Cost: ¥2,800,000)
KeywordsBangladesh / arsenic / groundwater / alluvial plain / aquifer / Holocene / oxidizing-reducing / delta / 帯水層構造 / 第四紀層 / ボーリング / ヒ素汚染地下水 / アジアモンスーン地帯 / 酸素・水素安定同位体比 / 酸化還元反応 / 続成作用 / 有機物分解 / 亜ヒ酸
Research Abstract

Continuous sediment core samples and groundwaters were collected in the northern part of Sonargaon, Narayanganj, Bangladesh in the Ganges-Brahmaputra Delta in order to figure out the geological structure of the As-contaminated groundwater aquifers. The study area spans the alluvial plain and the Pleistocene terrace. The Quaternary strata in this area are divided into the Plio-Pleistocene sand, Upper Pleistocene mud, and Holocene sand units in the ascending order. The upper surface of the Upper Pleistocene mud unit are partly eroded and formed depression or valley where the Holocene sand unit is thicker than the surroundings and As-contamination is very high. The uppermost part of the lower aquifer in the Pleistocene terrace deposits was laterized reddish sediments, bordering the overlying impermeable mud unit. The groundwater in this aquifer preserves the oxidizing conditions with almost arsenic free nature. Highly As-contaminated groundwater is found in the upper aquifer in the Holocene sand unit filling in the alluvial plain. Highly As contaminated groundwater appears closely related to the silt to fine sand lenses, and As free groundwater can be obtained from where only sandy sediments comprising coarser than medium sand fraction were recovered in the sediment column. Such a limited occurrence of highly As contaminated groundwater suggests that the contamination occurs during vertical infiltration of groundwater through silt to fine sand lens along or around the installed well tubes due to excess use of the groundwater.

Report

(5 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (17 results)

All 2005 2004 Other

All Journal Article (10 results) Publications (7 results)

  • [Journal Article] Transformation of arsenic compounds in modern intertidal sediments of Iriomote Island, Japan2005

    • Author(s)
      Masuda Harue
    • Journal Title

      J. Geochemical Exploration 871

      Pages: 73-81

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Determination of As^<III>/As^v ratio in alluvial sediments of the Bengal Basin using X-ray absorption near-edge structure2005

    • Author(s)
      Itai Taka-aki
    • Journal Title

      Chemistry letters 35

      Pages: 866-867

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Determination of As^<III>/As^V ratio in alluvial sediments of the Bengal Basin using X-ray absorption near-edge structure2005

    • Author(s)
      Itai Taka-aki
    • Journal Title

      Chemistry letters 35

      Pages: 866-867

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Transformation of arsenic compounds in modern intertidal sediments of Iriomote Island, Japan2005

    • Author(s)
      Masuda Harue
    • Journal Title

      J.Geochemical Exploration 871

      Pages: 73-81

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Mineralogical and geomicrobiological investigations on groundwater arsenic enrichment in Bangladesh2004

    • Author(s)
      Akai Juniji
    • Journal Title

      Applied Geochemistry 19

      Pages: 215-230

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Some practical aspects of an on-line chromium reduction method for D/H analysis of natural waters using a conventional IRMS2004

    • Author(s)
      Itai Taka-aki
    • Journal Title

      Geochemical Journal 38

      Pages: 435-440

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Mineralogical and geomicrobiological investigations on groundwater arsenic enrichment in Bangladesh2004

    • Author(s)
      Akai Junji
    • Journal Title

      Applied Geochemistry 19

      Pages: 215-230

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Mineralogicala and geomicrobiological investigations on groundwater arsenic enrichment in Bangladesh2004

    • Author(s)
      Akai J.
    • Journal Title

      Applied Geochemistry Vol.19

      Pages: 215-230

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Some practical aspects of an on-line chromium reduction method for D/H analysis of natural waters using a conventional IRMS2004

    • Author(s)
      Itai T.
    • Journal Title

      Geochemical Journal Vol.38

      Pages: 435-440

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Isotopic composition of carbon in diamonds of diamondites : Record of mass fractionation in the upper mantle2004

    • Author(s)
      Maruoka T.
    • Journal Title

      Geochimica et Cosmochimica Acta Vol.68

      Pages: 1635-1644

    • Related Report
      2004 Annual Research Report
  • [Publications] Akai J., Izumi K., Fukuhara H., Masuda M., Nakano S.et al.: "Mineralogical and geomicrobiological investigations on groundwater arsenic enrichment in Bangladesh"Applied Geochemistry. 19. 215-230 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Miyoshi N., Satoh H., Yamaguchi Y., Masuda H.: "Synthetic silica glass for trace aluminum analysis in quartz by electron microplobe"J.Geostandard Geoanalysis. 27. 91-98 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 小宮洋行, 中屋真司, 益田晴恵, 日下部実: "酸素および水素同位体比と水質から見た長野県松本盆地中・南部地域の広域地下水流動系"日本地下水学会誌. 45. 145-168 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 伊藤浩子, 益田晴恵, 日下部実: "大阪北摂地域における地下水のヒ素含有量変動とその要因"日本地下水学会誌. 45. 3-18 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Yanagisawa F., Jia S.-Y., Masuda H., Yang H.-D., Ueda A., et al.: "Sulfur isotope ratio of sulfate in the rain collected in November and December"J.Chengdu Univ.Technol.. 30. 96-98 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Ghandour I.M., Masuda H., Maejima W.: "Mineralogical and chemical characteristics of Bajocian-Bathonian shales, G.Al Maghara.North Sinai.Egypt : Climatic and environmental significance"Geochemical J. 37. 87-108 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 益田晴恵, 奥平敬元(OMUPユニヴァ編): "地球学へのいざない"大阪公立大学出版会. 213 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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