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Addressing harmful algal blooms (HABs) impacts with ferrate(VI): Simultaneous removal of algal cells and toxins for drinking water treatment.
Chemosphere. 2017 Nov; 186:757-761.C

Abstract

Although ferrate(VI) has long been recognized as a multi-purpose treatment agent, previous investigations regarding ferrate(VI) for addressing harmful algal blooms (HABs) impacts in drinking water treatment only focused on a single HAB pollutant (e.g. algal cells or algal toxins). Moreover, the performance of ferrate(VI)-driven coagulation was poorly investigated in comparison with ferrate(VI) oxidation, though it has been widely acknowledged as a major ferrate(VI) treatment mechanism. We herein reported ferrate(VI) as an emerging agent for simultaneous and effective removal of algal cells and toxins in a simulated HAB-impacted water. Ferrate(VI)-driven oxidation enabled algal cell inactivation and toxin decomposition. Subsequently, Fe(III) from ferrate(VI) reduction initiated an in-situ coagulation for cell aggregation. Cell viability (initial 4.26 × 104 cells/mL at pH 5.5 and 5.16 × 104 cells/mL at pH 7.5) decreased to 0.0% at ≥ 7 mg/L Fe(VI) at pH 5.5 and 7.5, respectively. Cell density and turbidity were dramatically decreased at pH 5.5 once ferrate(VI) doses were beyond their respective threshold levels, which are defined as minimum effective iron doses (MEIDs). However, the particulate removal at pH 7.5 was poor, likely because the coagulation was principally driven by charge neutralization and a higher pH could not sufficiently lower the particle surface charge. Meanwhile, algal toxins (i.e., microcystins) of 3.98 μg/L could be substantially decomposed at either pH. And the greater degradation achieved at pH 5.5 was due to the higher reactivity of ferrate(VI) at the lower pH. This study represents the first step toward the ferrate(VI) application as a promising approach for addressing multiple HABs impacts for water treatment.

Authors+Show Affiliations

Department of Earth and Environmental Studies, Montclair State University, Montclair, NJ 07043, United States. Electronic address: dengy@montclair.edu.Passaic River Institute, Montclair State University, Montclair, NJ 07043, United States; Department of Biology, Montclair State University, Montclair, NJ 07043, United States.Department of Earth and Environmental Studies, Montclair State University, Montclair, NJ 07043, United States; School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, Hubei Province 430068, China.Department of Earth and Environmental Studies, Montclair State University, Montclair, NJ 07043, United States.Passaic River Institute, Montclair State University, Montclair, NJ 07043, United States; Department of Biology, Montclair State University, Montclair, NJ 07043, United States.Passaic River Institute, Montclair State University, Montclair, NJ 07043, United States; Department of Biology, Montclair State University, Montclair, NJ 07043, United States.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28822256

Citation

Deng, Yang, et al. "Addressing Harmful Algal Blooms (HABs) Impacts With ferrate(VI): Simultaneous Removal of Algal Cells and Toxins for Drinking Water Treatment." Chemosphere, vol. 186, 2017, pp. 757-761.
Deng Y, Wu M, Zhang H, et al. Addressing harmful algal blooms (HABs) impacts with ferrate(VI): Simultaneous removal of algal cells and toxins for drinking water treatment. Chemosphere. 2017;186:757-761.
Deng, Y., Wu, M., Zhang, H., Zheng, L., Acosta, Y., & Hsu, T. D. (2017). Addressing harmful algal blooms (HABs) impacts with ferrate(VI): Simultaneous removal of algal cells and toxins for drinking water treatment. Chemosphere, 186, 757-761. https://doi.org/10.1016/j.chemosphere.2017.08.052
Deng Y, et al. Addressing Harmful Algal Blooms (HABs) Impacts With ferrate(VI): Simultaneous Removal of Algal Cells and Toxins for Drinking Water Treatment. Chemosphere. 2017;186:757-761. PubMed PMID: 28822256.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Addressing harmful algal blooms (HABs) impacts with ferrate(VI): Simultaneous removal of algal cells and toxins for drinking water treatment. AU - Deng,Yang, AU - Wu,Meiyin, AU - Zhang,Huiqin, AU - Zheng,Lei, AU - Acosta,Yaritza, AU - Hsu,Tsung-Ta D, Y1 - 2017/08/11/ PY - 2017/06/24/received PY - 2017/08/09/revised PY - 2017/08/10/accepted PY - 2017/8/20/pubmed PY - 2017/12/22/medline PY - 2017/8/20/entrez KW - Algal cells KW - Algal toxins KW - Chemical oxidation KW - Coagulation KW - Drinking water treatment KW - Ferrate(VI) SP - 757 EP - 761 JF - Chemosphere JO - Chemosphere VL - 186 N2 - Although ferrate(VI) has long been recognized as a multi-purpose treatment agent, previous investigations regarding ferrate(VI) for addressing harmful algal blooms (HABs) impacts in drinking water treatment only focused on a single HAB pollutant (e.g. algal cells or algal toxins). Moreover, the performance of ferrate(VI)-driven coagulation was poorly investigated in comparison with ferrate(VI) oxidation, though it has been widely acknowledged as a major ferrate(VI) treatment mechanism. We herein reported ferrate(VI) as an emerging agent for simultaneous and effective removal of algal cells and toxins in a simulated HAB-impacted water. Ferrate(VI)-driven oxidation enabled algal cell inactivation and toxin decomposition. Subsequently, Fe(III) from ferrate(VI) reduction initiated an in-situ coagulation for cell aggregation. Cell viability (initial 4.26 × 104 cells/mL at pH 5.5 and 5.16 × 104 cells/mL at pH 7.5) decreased to 0.0% at ≥ 7 mg/L Fe(VI) at pH 5.5 and 7.5, respectively. Cell density and turbidity were dramatically decreased at pH 5.5 once ferrate(VI) doses were beyond their respective threshold levels, which are defined as minimum effective iron doses (MEIDs). However, the particulate removal at pH 7.5 was poor, likely because the coagulation was principally driven by charge neutralization and a higher pH could not sufficiently lower the particle surface charge. Meanwhile, algal toxins (i.e., microcystins) of 3.98 μg/L could be substantially decomposed at either pH. And the greater degradation achieved at pH 5.5 was due to the higher reactivity of ferrate(VI) at the lower pH. This study represents the first step toward the ferrate(VI) application as a promising approach for addressing multiple HABs impacts for water treatment. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/28822256/Addressing_harmful_algal_blooms__HABs__impacts_with_ferrate_VI_:_Simultaneous_removal_of_algal_cells_and_toxins_for_drinking_water_treatment_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(17)31274-2 DB - PRIME DP - Unbound Medicine ER -