Emergency water treatment with combined ferrate(<scp>vi</scp>) and ferric salts for disasters and disease outbreaks

Zheng, Lei; Cui, Junkui; Deng, Yang

doi:10.1039/d0ew00483a

Cited by 28 publications

(18 citation statements)

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“…Furthermore, the oxidation of amines will eliminate one of the precursors in water that generate DBPs during chlorination; ,, therefore, the amount of chlorinated DBPs would decrease in the use of Fe(VI) as a preoxidant before chlorination. Fe(VI) has been demonstrated to be an effective disinfectant and coagulant. ,− Therefore, application of Fe(VI) has a potential to have multiple advantages in treatment processes.…”

Section: Discussionmentioning

confidence: 99%

Generation of Iron(IV) in the Oxidation of Amines by Ferrate(VI): Theoretical Insight and Implications in Oxidizing Pharmaceuticals

et al. 2021

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Aliphatic amines are ubiquitously present in natural waters and constitute one of the major moieties in dissolved organic matter and water micropollutants such as pharmaceuticals. This paper presents aliphatic amine {monomethylamine (CH3NH2, MMA), dimethylamine [(CH3)2NH, DMA], and trimethylamine [(CH3)3N, TMA]}-enhanced oxidation of pharmaceuticals (trimethoprim, atenolol, carbamazepine, and sulfadiazine) by ferrate(VI) [FeVIO4 2–, Fe(VI)]. The magnitude of the enhancement varies with amines, and DMA shows the greatest potential to increase the level of oxidation of trimethoprim. The computational approach is applied to describe the trend of an increased level of oxidation by Fe(VI) in the presence of amines. The computation showed that an Fe(VI)/amine solution forms highly reactive FeIV species as intermediates that react with pharmaceuticals to yield enhanced oxidation. In the rate-determining step of Fe(VI) reactions with amines, TS1, the Fe(VI) is reduced and abstracts an H from N, followed by the transfer of an O atom to N to form a very stable intermediate involving a nitroxide radical. The abstracted H is then transferred back to the N-O group in TS2 to form an H-bonded product complex, which dissociates to the products. The difference in the reactivity of the FeIV species with the type of amine explains the trend seen experimentally in the enhanced oxidation of pharmaceuticals.

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Section: Discussionmentioning

confidence: 99%

Generation of Iron(IV) in the Oxidation of Amines by Ferrate(VI): Theoretical Insight and Implications in Oxidizing Pharmaceuticals

et al. 2021

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“…On the other hand, though ferrate(VI) is well known to be more active with the pH decrease, ferrate(VI) disinfection was better performed at a weakly alkaline condition than in an acidic solution, in consistence with findings reported in a previous study (Zhang et al, 2020). Ferrate(VI) disinfection relies heavily on two factors, including ferrate(VI) activity and stability, both of which are greatly influenced by pH (Zheng et al, 2020). A lower pH leads to the better oxidizing capability of ferrate(VI), but makes ferrate(VI) more unstable, thus having a lower oxidant exposure (i.e., Ct value).…”

Section: Resultsmentioning

confidence: 99%

“…Price of potassium ferrate(VI) powders in 2020 is approximately $0.49/g as Fe (Zheng et al, 2020). The expense associated with ferrate(VI) consumption is $4.41/m 3 for the CEPT application at a dose of 9.0 mg/L Fe(VI).…”

Section: Resultsmentioning

confidence: 99%

“…During the treatment, pH was not controlled or additionally buffered. Final pH was slightly increased by ≤0.20 due to ferrate(VI) protonation and OH − release from ferrate(VI) self‐decomposition (Zheng et al, 2020). Following the slow mixing, gravity‐driven sedimentation proceeded for 2 hr to simulate the primary sedimentation at a municipal wastewater treatment facility.…”

Section: Methodsmentioning

confidence: 99%

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Chemically enhanced primary treatment of municipal wastewater with ferrate(VI)

Zheng

Feng

Liu

et al. 2020

Water Environment Research

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Chemically enhanced primary treatment (CEPT) with ferrate(VI), a multifunctional treatment agent, was investigated for the treatment of municipal wastewater in a laboratory‐scale study. The treatment performance was evaluated at different ferrate(VI) doses (0.0–9.0 mg/L as Fe) and pH (6.0 and 7.5). The optimal removals of total suspended solids (TSS) (52%), total chemical oxygen demand (COD) (34%), and total phosphorus (47%) were achieved at the highest ferrate(VI) dose (9.0 mg/L as Fe) and the weakly alkaline condition (pH 7.5). The pollutant abatements principally ascribed to the formation of large‐sized aggregate and ensuing sedimentation fell within the reported ranges of CEPT with traditional coagulants. However, different from conventional CEPT, ferrate(VI) appreciably removed recalcitrant dissolved organic phosphorus (49%) and simultaneously inactivated total coliform (3.30 log removal) and Escherichia coli (3.67 log removal) at 9.0 mg/L Fe(VI) and pH 7.5. The CEPT with ferrate(VI) offers an innovative alternative for improving municipal wastewater treatment. Practitioner points Ferrate(VI) represents a promising agent for chemically enhanced primary treatment (CEPT) of municipal wastewater. CEPT with ferrate(VI) can effectively alleviate TSS, total COD, and total P via the formation of large‐sized aggregates and ensuing sedimentation. Ferrate(VI) can substantially remove recalcitrant dissolved organic phosphorus in municipal wastewater. Different from other CEPT coagulants, ferrate(VI) can appreciably inactivate bacterial indicators during CEPT. Higher ferrate(VI) dose and weakly alkaline pH favor the performance of ferrate(VI) CEPT.

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“…An emergency means a condition or status where the people's ability decreases and they cannot buck up their ordinary livelihoods because of losses or dangers to their health and life. Emergency is generally caused by natural disaster (earthquake, flood, and drought) and infectious disease outbreaks (coronavirus, Ebola, and influenza pandemic), or it is man-made (chemical leakage) [ 1 ]. Floods are natural phenomena that generally appear in multiple parts of the world.…”

Section: Introductionmentioning

confidence: 99%

Alternative Water Resources Selection to Supply Drinking Water in Flood Disasters by Multicriteria Decision‐Making Techniques (DANP and VIKOR)

Zamani

Abbasi

Alipour

et al. 2022

Journal of Environmental and Public Health

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Background. Emergency is generally caused by natural disaster and infectious disease outbreaks, or it is man-made. Floods are natural phenomena that generally appear in multiple parts of the world. Flooding is one of the most destructive naturally occurring environmental hazards and can cause public, infrastructural, and environmental damage. The purpose of this study is to select alternative water resources for supplying Bandar Abbas in flood disasters by multicriteria decision-making techniques. Methods. Information required includes possible water resources alternative for flood, quantitative and qualitative characteristics of the water resources, climatic circumstances, and demographic information used in organizations data and previous studies. After selecting and proposing water resources alternative for Bandar Abbas in flood, the subcriteria were weighed applying DANP (DEMATEL-ANP) techniques and water resources were prioritized with the VIKOR technique. According to the network structure and internal and external dependence of the criteria and subcriteria, the advantages of DANP in calculating weights have been used to adapt to more real-world problems. The VIKOR technique was developed for multicriteria optimization of complex systems. Results. After reviewing and extracting the criteria from various studies, 9 main criteria and 44 subcriteria were defined to select water resources in disasters and emergencies. According to field studies and related organizations’ information, the proposed water resources for Bandar Abbas to use in flood disasters include humidity, sea (Persian Gulf), Sarkhoon plain, and wastewater treatment plant of Bandar Abbas. Conclusion. Results showed that the optimal water resources for Bandar Abbas in flood disasters are the sea and wastewater treatment plant effluent (after advanced treatment). The study proposed appropriate model to select optimal water resources for various natural disasters in different geographical areas. This model can help officials and decision-makers to plan for drinking water supply from disaster-prone areas before disasters occur.

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Emergency water treatment with combined ferrate(vi) and ferric salts for disasters and disease outbreaks

Abstract: Clean water is vital amid a disaster or disease outbreak-related emergency. This study aimed to evaluate an inventive emergency water treatment (EWT) process with the joint use of ferrate(VI) and...

Cited by 28 publications

References 70 publications

Generation of Iron(IV) in the Oxidation of Amines by Ferrate(VI): Theoretical Insight and Implications in Oxidizing Pharmaceuticals

Generation of Iron(IV) in the Oxidation of Amines by Ferrate(VI): Theoretical Insight and Implications in Oxidizing Pharmaceuticals

Chemically enhanced primary treatment of municipal wastewater with ferrate(VI)

Alternative Water Resources Selection to Supply Drinking Water in Flood Disasters by Multicriteria Decision‐Making Techniques (DANP and VIKOR)

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