Iron-based technology coupling moderate preoxidation with hybrid coagulation for highly effective removal and moderate growth inhibition of Oscillatoria in drinking water treatment plants

Jin, Yan; Chen, Feiyong; Xu, Bing; Ma, Guangxiang; Zhang, Lijie; Yang, Zhiyong; Liu, Rupeng; Sun, Cuizhen; Cheng, Xiaoxiang; Guo, Ning; Fu, Jie; Xu, Chang; Wang, Yue; Wu, Daoji; Wang, Lin

doi:10.1016/j.jece.2022.107723

Cited by 11 publications

(2 citation statements)

References 35 publications

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“…Meanwhile, DOC was also increased dramatically from 1.78 to 2.91 and 3.59 mg/L, respectively [14]. On the one hand, excessive oxidation by Fe(VI) endowed the algal cell surface with a powerful capacity to consume positively charged Fe(II) coagulants [67]. On the other hand, the adverse effects of IOM release outweighed the removal ability of the flocculant to adsorb organic matter.…”

Section: Fe(vi) Combined With Fe(ii) For Algal Removalmentioning

confidence: 99%

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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Section: Fe(vi) Combined With Fe(ii) For Algal Removalmentioning

confidence: 99%

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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“…For instance, aluminum sulfate coagulant only removed 79.3% of harmful algae (Oscillatoria sp.) from a water column [14], and the efficiency was only ~60% in H. akashiwo removal by modified clay [15]. In addition, the effectiveness of coagulation can be easily affected by the water quality, such as the salinity, temperature, and dissolved organic matters like humic acid [10,16].…”

Section: Introductionmentioning

confidence: 99%

Efficient Inactivation and Removal of a Harmful Marine Algae—Heterosigma akashiwo—By UV-Assisted Permanganate Oxidation

Zeng,

Chen,

Jin

et al. 2023

Water

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Harmful algal blooms (HABs) caused by Heterosigma akashiwo are occurring in coastal waters frequently, posing a great risk to marine environments and subsequent treatment processes like desalination. UV-assisted permanganate oxidation (UV/KMnO4) is recognized as an innovative advanced oxidation process. This study investigated the inactivation and removal efficiencies of H. akashiwo cells by UV/KMnO4. Algal cells were effectively disintegrated into fragments by UV/KMnO4. Also, the degradation of photosynthetic pigments, membrane lipid peroxidation, and severe oxidative stress in algal cells was observed. The removal efficiency of algal cells reached 80.2% by 20 min of UV/KMnO4 oxidation, with a KMnO4 dosage of 5 mg L−1. In addition, the residual algal cells could be completely removed by a subsequent self-settling process, without an additional coagulation procedure. The fragmentation of algal cells caused by UV/KMnO4 may facilitate the formation of algal flocs, thereby improving the cell settleability. Furthermore, UV254 was significantly reduced by UV/KMnO4, which is expected to reduce the formation of disinfection byproducts and membrane fouling. This study elucidates that UV/KMnO4 can be a promising technique for the efficient treatment of harmful marine algae.

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Calcium sulfite oxidation activated by ferrous iron integrated with membrane filtration for removal of typical algal contaminants

Gao

Tan

et al. 2023

Chemosphere

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Iron-based technology coupling moderate preoxidation with hybrid coagulation for highly effective removal and moderate growth inhibition of Oscillatoria in drinking water treatment plants

Cited by 11 publications

References 35 publications

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

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

Efficient Inactivation and Removal of a Harmful Marine Algae—Heterosigma akashiwo—By UV-Assisted Permanganate Oxidation

Calcium sulfite oxidation activated by ferrous iron integrated with membrane filtration for removal of typical algal contaminants

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