The effectiveness and kinetics of petrolim refinery wastewater treatment using potassim ferrate as an oxidant and coagulant

Kareema, Bshaeer Yousif; Tameemi, Husham Mohammed Al.

doi:10.1063/5.0093502

Cited by 1 publication

(1 citation statement)

References 24 publications

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“…In weakly acidic environments, Fe(VI) has a redox potential of up to 2.2 V [24,25]. Fe(VI) is decomposed rapidly at an acidic pH, but has the greatest stability at pH~10.0, as reported in studies that showed a half-life of 102 s at pH 6.0 and of 105 s at pH 10.0 [26]. At suitable pH conditions, cell density and turbidity are dramatically reduced once Fe(VI) dose exceeds their respective threshold levels (defined as the minimum effective iron dose (MEID)) [27].…”

Section: Factors Affecting Fe(vi) Removal Efficiencymentioning

confidence: 96%

The Role of Ferrate (VI) in the Pretreatment of Algal Cells and Algal Organic Matters: A Review

Wang,

Yang,

Chen

et al. 2024

Water

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Algal blooms are caused by excessive levels of nitrogen, phosphorus, and other plant nutrients in water. Algae and algal organic matter (AOM) pose a great threat to the quality of drinking water. This manuscript offers a systematic review of algal removal by ferrate (Fe(VI)) oxidation, including the conditions for the removal of different algae by Fe(VI) and the factors affecting the removal efficiency. On this basis, the oxidation and coagulation mechanisms of algae removal by Fe(VI) are discussed. Then, the review introduces the process combining Fe(VI) pre-oxidation with aluminum sulfate action. The addition of aluminum sulfate can further enhance the coagulation effect and reduce the formation of disinfection byproducts (DBPs) in the subsequent chlorination process by effectively removing AOM, which is recognized as a precursor of DBPs. In addition, recent studies on the combined application of Fe(VI) and Fe(II) are also reviewed. In a reasonable dose range, the synergistic effect of Fe(VI) and Fe(II) can significantly improve the removal of algae and algal toxins. Finally, this review provides a comprehensive evaluation of the applicability of Fe(VI) in removing algal material, offers guidance for the harmless treatment of algae with Fe(VI), and identifies future research questions.

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