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Geochemical characteristics of the mud volcano fluids in southwestern Taiwan and their possible linkage to elevated arsenic concentration in Chianan plain groundwater
Natl Cheng Kung Univ, Tainan, Taiwan.
Natl Cheng Kung Univ, Tainan, Taiwan.
Natl Cheng Kung Univ, Tainan, Taiwan.
Natl Cheng Kung Univ, Tainan, Taiwan.
Vise andre og tillknytning
2012 (engelsk)Inngår i: ENVIRONMENTAL EARTH SCIENCES, ISSN 1866-6280, Vol. 66, nr 5, s. 1513-1523Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Fluid and mud samples were collected from Wushanting (WST), Hsiaokunshui (HKS), Yenshuikeng (YSK), Kuantzeling (KZL), and Kunshuiping (KSP) mud volcanoes of southwestern Taiwan. Concentrations of major ions and trace elements in mud volcanic fluids were analyzed to find the possible linkage to elevated arsenic (As) concentrations in the Chianan plain groundwater. The elevated Na+, K+, and Cl- concentrations indicated possible marine origin of the fluids. The trace element concentrations in the mud volcanic fluids were generally low, but the As concentrations were up to 0.12 mg/L. High contents of As, Fe, and Mn were observed in the mud samples. Saturation index calculations indicated that both carbonate and oxide minerals acted as potential sinks for As in the mud volcanic fluids. Arsenic in the dewatering fluids and muds may be transported by the subsurface flow and surface streams as suspended solids and eventually deposited in the Chianan plain aquifers. Under reducing conditions, As may be released from the host minerals (such as Fe- and Mn-oxides/hydroxides), thereby causing widespread groundwater As pollution.

sted, utgiver, år, opplag, sider
2012. Vol. 66, nr 5, s. 1513-1523
Emneord [en]
Arsenic, Mud volcano, Saturation indices, Speciation, Groundwater, Taiwan
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-99063DOI: 10.1007/s12665-011-1391-3ISI: 000305214900024Scopus ID: 2-s2.0-84862262924OAI: oai:DiVA.org:kth-99063DiVA, id: diva2:541633
Merknad
QC 20120720Tilgjengelig fra: 2012-07-20 Laget: 2012-07-13 Sist oppdatert: 2012-07-20bibliografisk kontrollert

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