Arsenite removal in a goethite/oxalate system under UVA irradiation: Roles of different reactive species in acidic and neutral conditions

Arsenite photo-oxidation and removal by ferrihydrite in the presence of oxalate: a pH dependence and surface-mediated process

“…As(III) and total arsenic (i.e., As(III) + As(V)) during hydride generation were determined according to our previous work. 26 As(III) was determined using 1.5% HCl-1.5% KBH 4 solution, while total arsenic was determined using 1% (m v À1 ) thiourea-1% (m v À1 ) ascorbic acid and 5% HCl-2% KBH 4 solutions.…”