Concept

Arsenic contamination of groundwater

Publications associées (109)

Solar oxidation and removal of arsenic at circumneutral pH in iron containing waters

An estimated 30-50 million people in Bangladesh consume groundwater with arsenic contents far above accepted limits. A better understanding of arsenic redox kinetics and simple water treatment procedures are urgently needed. We have studied thermal and pho ...

2001

Typology of recent groundwaters from different aquifer environments based on geogenic tracer elements

A key problem in environmental science and in engineering geology is the often incomplete understanding of the origin of dissolved components in groundwater. The dissolved contents of trace elements in groundwater are of special importance for groundwater ...

EPFL2001

Modelling solute transport in structured soils: Performance evaluation of ADR and TRM models

David Andrew Barry

The movement of chemicals through the soil to the groundwater or discharged to surface waters represents a degradation of these resources. In many cases, serious human and stock health implications are associated with this form of pollution. The chemicals ...

2001

Numerical modelling for design and evaluation of groundwater remediation schemes

David Andrew Barry

The growth in readily available computational resources has led to increasingly sophisticated numerical models of biologically mediated, reactive chemical transport in aquifers. Such models are able to both simulate and predict behaviour of contaminants ov ...

2000

Arsenic adsorption and oxidation at manganite surfaces. 1. Method for simultaneous of determination of adsorbed and dissolved arsenic species

Janet Gordon Hering

Arsenic occurs in the +III oxidation state as a metastable species in oxic waters. Under oxic conditions, As(III) is both more mobile in natural waters and less efficiently removed by water treatment processes than As(V). Other oxidants, however, can react ...

2000

Arsenic occurrence and speciation in municipal ground-water-based supply system

Janet Gordon Hering

The city of Hanford, California, relies on ground water for its municipal water supply. Arsenic concentrations in local wells frequently exceed the current drinking water standard (50 μg/L), although some dilution is achieved within the distribution system ...

2000

Behavior of arsenic and other redox-sensitive elements in Crowley Lake, CA: A reservoir in the Los Angeles Aqueduct System

Janet Gordon Hering

Elevated arsenic concentrations in Crowley Lake derive from upstream geothermal inputs. We examined the water column of Crowley Lake under stratified and unstratified conditions, seeking evidence for algal uptake and transformation of arsenic and its depos ...

2000

Impact de l'exploitation des alpages sur la qualité des eaux

Agricultural fertiliser (farmyard manure), covers partially the nutrient elements demand of the vegetation cover. However, its application is difficult as regards the unknown concentration of fertilising elements contained and their biological availability ...

EPFL1999

Rapid oxidation of geothermal arsenic(III) in streamwaters of the eastern Sierra Nevada

Janet Gordon Hering

Arsenic redox cycling was examined in source waters of the Los Angeles Aqueduct, specifically at Hot Creek, a tributary of the Owens River. Elevated arsenic concentrations in Hot Creek result from geothermal inputs. Total arsenic and As(III) concentrations ...

1998

Estimating the retardation coefficient of trichloroethene for a sand aquifer low in sediment organic carbon - A comparison of methods

David Andrew Barry

Significant groundwater contamination by trichloroethene (TCE) has been identified in the Spearwood Sands aquifer, Perth Western Australia. The organic carbon content of the aquifer sediment is very low and reported retardation coefficients for TCE in low ...

1998

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