Mobilization of arsenic and iron from Red River floodplain sediments, Vietnam

Postma, Dieke; Jessen, Søren; Huệ, Nguyễn Thị; Duc, Thanh; Koch, Christian; Viet, Pham Hung; Nhân, Phạm Quý; Larsen, Flemming

doi:10.1016/j.gca.2010.03.024

Cited by 128 publications

(99 citation statements)

References 52 publications

(95 reference statements)

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“…Kuo (1996) Acid volatile sulfide ( Fe Asc P Asc Ascorbic acid (adjusted to pH 3) reductively extracts Fe(III) and P associated with Fe(III) phases such as ferric phosphates and Fe-oxides. Larsen et al (2006), Postma (2010) HCl acid (pH 3) HCl acid (1 mM) Fe HCl P HCl HCl acid (adjusted to pH 3) extracts Fe 2+ and P from Fe(II)-containing minerals such as siderite or vivianite (Postma, 1993). Larsen et al (2006), Postma (2010), Postma (1993) The relative contents of Fe(II) and Fe(III) in unaltered natural sediments were analyzed by 57 Fe transmission Mössbauer spectroscopy at room temperature (RT) and 80 K. Samples for measurement were prepared by adding approximately 0.1 g freeze dried sediment (under anaerobic conditions) to plastic absorber discs.…”

Section: Sediment Solid Phase Analysis and Chemical Extractionsmentioning

confidence: 99%

Vivianite formation and its role in phosphorus retention in Lake Ørn, Denmark

et al. 2015

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Section: Sediment Solid Phase Analysis and Chemical Extractionsmentioning

confidence: 99%

Vivianite formation and its role in phosphorus retention in Lake Ørn, Denmark

et al. 2015

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“…This issue raises the question as to whether arsenic mobilization is anthropogenic (Thuy et al 2015). Arsenic levels exceeded the current WHO standard of 10 μg/L in as many as 72% of the tubewells included in the study (Agusa et al 2006) although there was a substantial degree of variation between different areas with concentrations ranging from 0.1 to 3050 μg/L Berg et al 2007;Postma et al 2010;Agusa et al 2009;Editorial 2010;Larsen et al 2008;Nguyen and Itoi 2009;Jessen et al 2008;Eiche et al 2008) and an average arsenic concentration from 159 to 430 μg/L (Berg et al 2001), respectively. The sources of contamination are distributed over a large area in Red River Delta.…”

Section: The Situation In the Red River Deltamentioning

confidence: 75%

“…Arsenic is known to cause diseases of many major organ systems. Moreover, chronic arsenic exposure is correlated with an array of cancers (bladder, kidney, skin, and liver), where inorganic arsenic is more toxic than organic arsenicals (Postma et al 2010;Agusa et al 2009;Editorial 2010).…”

Section: The Situation In the Red River Deltamentioning

confidence: 99%

Remarks on the current quality of groundwater in Vietnam

Luu

2017

Environ Sci Pollut Res

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This paper reviews the current quality of groundwater in Vietnam. In Vietnam, groundwater is obtained primarily from tubewells, which have high concentrations of pollutants such as As, Fe, Mn, and NH 4 + . In the areas where groundwater tests were conducted, arsenic levels ranged from 0.1-3050 μg/L, which substantially exceed the standard of 10 μg/L which has been established by the WHO. Contamination sources are distributed over a large area from the Red River Delta in the north to the Mekong River Delta in the south, putting as many as ten million people at risk of adverse health effects. Levels of arsenic and iron in sediment are strongly correlated, which indicate that the presence of arsenic in groundwater results from the reduction of arsenic bound to iron oxyhydroxides. It is important to raise awareness of these issues among the Vietnamese public by disseminating information about the negative effects of contaminated drinking water, as well as carrying out long-term research projects to identify other sources of contamination and improving water treatment technology and water management capabilities.

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“…Source of arsenic contamination is believed to be mostly geogenic (Wang et al 2009;Gao et al 2013) with shallow groundwater aquifers having high concentrations than deep aquifers (Nickson et al 2005). Presence of iron in groundwater is believed to be a trigger to mobilization of arsenic through reductive dissolution processes (Postma et al 2010;Burton et al 2013). In Lahore, arsenic contamination is higher in distribution system compared to source water.…”

Section: Introductionmentioning

confidence: 99%

Quality and hydrochemistry of groundwater used for drinking in Lahore, Pakistan: analysis of source and distributed groundwater

Abbas

Fazeelat

et al. 2015

Environ Earth Sci

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More than 7 million people of Lahore city, Pakistan, use groundwater for drinking and other household purposes. The quality of drinking water from source and distribution system was investigated, and the hydrochemical characteristics and formation mechanisms of groundwater were analyzed. Statistical summary showed higher mean values of major descriptors in distributed groundwater samples compared with source groundwater samples. A total of 50 drinking water samples (16 from source, and 34 from distribution system) were examined for physical, chemical and bacteriological parameters, including pH, turbidity, electrical conductivity, total dissolved solids, total hardness, total alkalinity, Ca 2? , Mg 2? , Na ? , K ? , SO 4 2-, Cl -, NO 3 -, F -, arsenic (As) chromium (Cr), iron (Fe), copper (Cu), zinc (Zn), cadmium (Cd) and lead (Pb). Varying concentrations of trace amounts of Cr (in 8 samples), Fe (18 samples), Cu (18 samples), Zn (13 samples) and Pb (14 samples) were detected. However, the detected trace elements were within the WHO permissible limits for drinking water except Pb where 5 out of 14 samples showed higher than WHO limit value (Pb [ 0.01 mg/L). 19 out of 50 samples (6 from source and 13 from distributed samples) showed high values of alkalinity ([250 mg/L). All of 16 groundwater samples from source exceeded 0.01 mg/L WHO limit value for arsenic (As). On the basis of bacteriological analysis, 42 % samples (12 % from source, 55 % from distribution) did not meet WHO guidelines and were unsafe for drinking, especially distributed groundwater samples. Mg-HCO 3 contents predominated the groundwater type followed by Ca-HCO 3 . Carbonate weathering was revealed to be the dominant process controlling dissolution/precipitation processes. PHREEQC modeling showed that the aqueous phase was undersaturated with respect to significant gypsum, halite and mirabilite while equilibrium to saturated with respect to aragonite, calcite and dolomite was observed. Principal component analysis (PCA) revealed that the concentration of As was strongly associated with that of SO 4 2-. Reductive dissolution and pH-dependent desorption are the plausible processes responsible for the observed high As concentrations in Lahore.

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Mobilization of arsenic and iron from Red River floodplain sediments, Vietnam

Cited by 128 publications

References 52 publications

Vivianite formation and its role in phosphorus retention in Lake Ørn, Denmark

Vivianite formation and its role in phosphorus retention in Lake Ørn, Denmark

Remarks on the current quality of groundwater in Vietnam

Quality and hydrochemistry of groundwater used for drinking in Lahore, Pakistan: analysis of source and distributed groundwater

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