TY - GEN
T1 - Removal of co-occurring anions (U, Sb, W, V, P, Si, CIO4) during arsenic treatment
AU - Westerhoff, Paul
AU - Hristovski, Kiril
AU - Benn, Troy
AU - Shafieian, Pedram
PY - 2006/12/1
Y1 - 2006/12/1
N2 - As arsenic treatment systems for groundwater are being designed and installed, it is becoming apparent that many co-occurring anions can be present along with arsenic. Geological formations containing arsenic are often enriched with other trace metals, including uranium, antimony, tungsten, vanadium, and silica. With exception of silica, U, Sb, W, and V have all been implicated with various adverse human health effects. New regulations mean that many small utilities still do not know how much uranium is present in their waters. While silica does not pose a health effect, its presence detrimentally impacts arsenic removal by iron adsorbents. Elevated phosphate is less likely to occur in conjunction with elevated arsenic, but we have data from several sites with significant P concentrations. There is also the potential for chemical contaminants (e.g., perchlorate) to occur with arsenic - and systems designed to remove ClO4 - generally do not remove arsenic. Therefore data from multiple groundwaters across the US were studied for simultaneous removal of arsenic and co-occurring anions.
AB - As arsenic treatment systems for groundwater are being designed and installed, it is becoming apparent that many co-occurring anions can be present along with arsenic. Geological formations containing arsenic are often enriched with other trace metals, including uranium, antimony, tungsten, vanadium, and silica. With exception of silica, U, Sb, W, and V have all been implicated with various adverse human health effects. New regulations mean that many small utilities still do not know how much uranium is present in their waters. While silica does not pose a health effect, its presence detrimentally impacts arsenic removal by iron adsorbents. Elevated phosphate is less likely to occur in conjunction with elevated arsenic, but we have data from several sites with significant P concentrations. There is also the potential for chemical contaminants (e.g., perchlorate) to occur with arsenic - and systems designed to remove ClO4 - generally do not remove arsenic. Therefore data from multiple groundwaters across the US were studied for simultaneous removal of arsenic and co-occurring anions.
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M3 - Conference contribution
AN - SCOPUS:84871507445
SN - 9781604237306
T3 - American Water Works Association - Water Quality Technology Conference and Exposition 2006: Taking Water Quality to New Heights
SP - 3032
EP - 3058
BT - American Water Works Association - Water Quality Technology Conference and Exposition 2006
T2 - Water Quality Technology Conference and Exposition 2006: Taking Water Quality to New Heights
Y2 - 5 November 2006 through 9 November 2006
ER -