Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Groundwater chemistry and arsenic mobilization in the Holocene flood plains in south-central Bangladesh
KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Mark- och vattenteknik, Miljögeokemi och ekoteknik. (KTH-International Groundwater Arsenic Research Group)ORCID-id: 0000-0003-4350-9950
KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Mark- och vattenteknik, Miljögeokemi och ekoteknik. (KTH-International Groundwater Arsenic Research Group)
Visa övriga samt affilieringar
2009 (Engelska)Ingår i: Environmental Geochemistry and Health, ISSN 0269-4042, E-ISSN 1573-2983, Vol. 31, 23-43 s.Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A comparative study of arsenic enrichment in the Bengal Delta (BD) was carried Out in three alluvial aquifers in south-central Bangladesh. Investigated sites included Sonargaon in Narayanganj, Chandina in Comilla and Sirajdikhan in Munshiganj districts. At all sites samples from different depths were collected, and water chemistry and redox status vs. depth trends were determined. The concentrations of DOC and HCO3- were highest at Sirajdikhan site, while at the Sonargaon and Chandina sites the concentrations were lower. On the contrary, the NH4+ concentration was high at the Chandina site as compared to the other sites. There was a good match between dissolved As and Fe at the Sirajdikhan and Sonargaon sites, but not at the Chandina site. The dissolved aqueous concentration of Mn was low at the Chandina site, which suggested that the Mn(IV) redox buffering step was missing. Speciation modeling indicated a possibility of siderite precipitation at all sites, but precipitation of rhodochrosite only at the Sonargaon and Sirajdikhan sites. At the Sirajdikhan site, the log P-CO2 values were very high (-1.37), which revealed the production Of CO2 in redox processes. Principal component analysis (PCA) indicated an impact of sea water and redox status of different samples. These results suggest that the dissolved As is de-coupled from dissolved Mn because when released, As is re-adsorbed onto the Fe(Ill) minerals in solid phase, as well as from dissolved Fe when precipitation of Fe(II) minerals controls the aqueous concentrations of Fe. In addition, several other concurrent redox processes may exert kinetic constraints depending on refractory characteristics of Fe(II) minerals.

Ort, förlag, år, upplaga, sidor
2009. Vol. 31, 23-43 s.
Nyckelord [en]
Groundwater, Bangladesh, Arsenic, Redox buffering, Speciation, Precipitation of secondary minerals, sedimentary organic-carbon, bengal basin, drinking-water, southeastern, bangladesh, aquifer sediments, matlab upazila, ganges delta, west-bengal, shallow, india
Nationell ämneskategori
Miljövetenskap
Identifikatorer
URN: urn:nbn:se:kth:diva-18477DOI: 10.1007/s10653-008-9230-5ISI: 000266560300003Scopus ID: 2-s2.0-64749100496OAI: oai:DiVA.org:kth-18477DiVA: diva2:336524
Anmärkning
QC 20100525Tillgänglig från: 2010-08-05 Skapad: 2010-08-05 Senast uppdaterad: 2017-12-12Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas

Övriga länkar

Förlagets fulltextScopus

Personposter BETA

Bhattacharya, Prosun

Sök vidare i DiVA

Av författaren/redaktören
Bhattacharya, ProsunHasan, Md Azizvon Brömssen, Mattias
Av organisationen
Miljögeokemi och ekoteknik
I samma tidskrift
Environmental Geochemistry and Health
Miljövetenskap

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 89 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf