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The influent and effluent concentrations of As(III), As(V) and nitrate during the operation of a 2-L bench-scale up-flow anaerobic sludge blanket reactor (R3) as a function of time. Panel A - As(III) in: (△) Influent and (▲) Effluent. Panel B - As(V) in:, (◯) Influent and (●) Effluent. Panel C - Nitrate in: (◇) Influent and (◆) Effluent.
