Simulation platform for in-situ Fe(II) oxidation and bioscorodite crystallization in a one-step process for As(V) immobilization from acid wastewater

[Display omitted] •A model of a one-step process for As(V) precipitation as bioscorodite was developed.•Experimental validation is performed in batch and continuous bioreactors.•Regulation of Fe(II) oxidation is a key factor on As(V) precipitation process.•Substrate affinity, biomass and Fe/As ratio...

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Bibliographic Details
Published in:Minerals engineering 2021-10, Vol.172, p.107170, Article 107170
Main Authors: Tec-Caamal, Edgar N., Rodríguez-Vázquez, Refugio, Weijma, Jan, Aguilar-López, Ricardo
Format: Article
Language:English
Subjects:
Arsenic
Bioscorodite
Iron
Modeling
Precipitation
Simulation
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Summary:[Display omitted] •A model of a one-step process for As(V) precipitation as bioscorodite was developed.•Experimental validation is performed in batch and continuous bioreactors.•Regulation of Fe(II) oxidation is a key factor on As(V) precipitation process.•Substrate affinity, biomass and Fe/As ratio were analyzed by numerical simulation. Crystalline scorodite is considered one of the safest materials available for the removal and disposal of arsenic. Its formation by biological means represents a promising solution for the treatment of acidic wastewater containing arsenic. In this study, an analysis of the processes that take place in a bioreactor for the biogenic scorodite crystallization was performed using mathematical modeling. The model was fitted to a set of experimental data, including batch and continuous bioreactors using two different thermoacidophilic archaeal strains, showing a successful model prediction capability (0.85 
ISSN:0892-6875
1872-9444
DOI:10.1016/j.mineng.2021.107170