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The influent and effluent concentrations of As(III) and As(V) in the continuous bioreactors R1 and R2 as a function of time. Panel A and C - As(III) in R1 and R2, respectively: (△) Influent, (▲) Effluent. Panel B and D: As(V) in R1 and R2, respectively: (◯) Influent, (●) Effluent.
