Premium
Development of a field speciation method for inorganic arsenic species in groundwater
Author(s) -
Karori Saqib,
Clifford Dennis,
Ghurye Ganesh,
Samanta Gautam
Publication year - 2006
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.2006.tb07666.x
Subject(s) - genetic algorithm , arsenite , arsenic , environmental chemistry , arsenate , ferrous , groundwater , chemistry , environmental science , geology , biology , ecology , geotechnical engineering , organic chemistry
This research describes the development of a dual preservation and field speciation technique for the arsenic species arsenite [As(III)] and arsenate [As(V)] using ion exchange field speciation of a sample preserved with EDTA and acetic acid. The new method is compared with existing speciation methods and is shown to be simple, robust, free of hazardous chemicals, and capable of recovering >90% of As(III) and As(V) despite possible interference from ferrous iron in the sample. The method was further refined through testing on 20 drinking water wells in five states. Results indicated that As(III) measured by field speciation agreed with subsequent lab speciation (conducted two to four days later) on the preserved sample with a correlation coefficient of R 2 = 0.997.