Tracer test with As(V) under variable redox conditions controlling arsenic transport in the presence of elevated ferrous iron concentrations

Höhn, Rouven; Isenbeck‐Schröter, Margot; Kent, Douglas B.; Davis, James A.; Jakobsen, Rasmus; Jann, S.; Niedan, V.; Scholz, Christian; Stadler, Susanne; Tretner, A.

doi:10.1016/j.jconhyd.2006.06.001

Cited by 45 publications

(18 citation statements)

References 57 publications

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“…The reducing conditions undoubtedly arise from microbial activity fueled by warm bottom temperatures and a supply of OC. Both Feand As-reducing bacteria may be present, as found by Höhn et al (2006) in a reducing zone of a shallow aquifer on Cape Cod, MA, USA.…”

Section: Water Columnmentioning

confidence: 80%

Distribution and seasonal dynamics of arsenic in a shallow lake in northwestern New Jersey, USA

Barringer

Szabó

Wilson

et al. 2010

Environ Geochem Health

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Elevated concentrations of arsenic (As) occurred during warm months in water from the outlet of Lake Mohawk in northwestern New Jersey. The shallow manmade lake is surrounded by residential development and used for recreation. Eutrophic conditions are addressed by alum and copper sulfate applications and aerators operating in the summer. In September 2005, arsenite was dominant in hypoxic to anoxic bottom water. Filterable As concentrations were about 1.6-2 times higher than those in the upper water column (23-25 μg/L, mostly arsenate). Hypoxic/anoxic and near-neutral bottom conditions formed during the summer, but became more oxic and alkaline as winter approached. Acid-leachable As concentrations in lake-bed sediments ranged up to 694 mg/kg in highly organic material from the tops of sediment cores but were <15 mg/kg in geologic substrate. During warm months, reduced As from the sediment diffuses into the water column and is oxidized; mixing by aerators, wind, and boat traffic spreads arsenate and metals, some in particulate form, throughout the water column. Similar levels of As in sediments of lakes treated with arsenic pesticides indicate that most of the As in Lake Mohawk probably derives from past use of arsenical pesticides, although records of applications are lacking. The annual loss of As at the lake outlet is only about 0.01% of the As calculated to be in the sediments, indicating that elevated levels of As in the lake will persist for decades.

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Section: Water Columnmentioning

confidence: 80%

Distribution and seasonal dynamics of arsenic in a shallow lake in northwestern New Jersey, USA

Barringer

Szabó

Wilson

et al. 2010

Environ Geochem Health

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“…The oxidation-reduction state of aquifer sediments is very important for As mobilization and transport (Höhn et al 2006). The relationship between As and iron release and Eh change during the microcosm experiments can be seen from Fig.…”

Section: The Evect Of Fe and Mn Oxyhydroxidesmentioning

confidence: 98%

Sediment geochemistry and arsenic mobilization in shallow aquifers of the Datong basin, northern China

Xie

Wang

Duan

et al. 2008

Environ Geochem Health

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Understanding the mechanism of arsenic (As) mobilization from sediments to groundwater is important for water quality management in areas of endemic arsenic poisoning, such as the Datong basin in northern China. The bulk geochemistry analysis of sediment samples from three 50-m boreholes drilled specifically for this study at As-contaminated aquifers, the groundwaters of which have an As concentration up to 1060 microg/l, revealed that the average bulk concentrations of major and trace elements of the samples are similar to those of the average upper continental crust. The average As content of the sediment samples (18.7 mg/kg) is higher than that of modern unconsolidated sediments (5-10 mg/kg). Moreover, the abundance of elements varied with grain size, with higher concentrations in finer fractions of the sediments, such as silt and clay. The concentration of NH(2)OH-HCl-extracted iron (Fe) strongly correlated with that of extracted As, suggesting that Fe oxyhydroxides may be the major sink of As in the aquifer. The results of microcosm experiments showed that As mobilization from sediments to groundwater is probably mainly related to changes in the redox conditions, with moderately reducing conditions being favorable for As release from sediments into groundwater.

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“…Conservation of mass is a tenet of science, formally dating back to 1748 (Hockey et al 2007), so the establishment of water budgets is a natural approach to assessing groundwater availability. Simply by accounting for inputs (through recharge and regional flow) and outputs (natural discharge to surface water, evapotranspiration, and anthropogenic extraction) and the change in storage, the amount of available groundwater can be established.…”

Section: The Concept Of Groundwater Depletionmentioning

confidence: 99%

“…Raindrops, during their brief residence in the atmosphere, dissolve carbon dioxide to form a weak carbonic acid. During infiltration, the weak carbonic acid reacts with minerals and rocks in the soil to dissolve them more readily to become a source of salt in aquifers (Hillel 2000). Changes in properties of soil and water lead to the development of an environment which deteriorates soil and water quality.…”

Section: Land Salinizationmentioning

confidence: 99%

“…Salinization, however, is a process that increases the concentration of salts in water or soil beyond a threshold limit; that is, mean electircal conductivity in the root zone (EC e ) in excess of 4 deci-siemens per meter (dS/m) at 25 C (Hillel 2000). The processes of waterlogging and salinization, although different in their characteristics, usually occur together and adversely affect water quality and crop yield.…”

Section: Land Salinizationmentioning

confidence: 99%

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The International Scale of the Groundwater Issue

Fienen

Arshad

2016

Integrated Groundwater Management

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Throughout history, and throughout the world, groundwater has been a major source of water for sustaining human life. Use of this resource has increased dramatically over the last century. In many areas of the world, the balance between human and ecosystem needs is difficult to maintain. Understanding the international scale of the groundwater issue requires metrics and analysis at a commensurate scale. Advances in remote sensing supplement older traditional direct measurement methods for understanding the magnitude of depletion, and all measurements motivate the need for common data standards to collect and share information. In addition to metrics of groundwater availability, four key international groundwater issues are depletion of water, degradation of water quality, the water-energy nexus, and transboundary water conflicts. This chapter is devoted to introducing these issues, which are also discussed in more detail in later chapters.

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Tracer test with As(V) under variable redox conditions controlling arsenic transport in the presence of elevated ferrous iron concentrations

Cited by 45 publications

References 57 publications

Distribution and seasonal dynamics of arsenic in a shallow lake in northwestern New Jersey, USA

Distribution and seasonal dynamics of arsenic in a shallow lake in northwestern New Jersey, USA

Sediment geochemistry and arsenic mobilization in shallow aquifers of the Datong basin, northern China

The International Scale of the Groundwater Issue

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