An often-overestimated adverse effect of halides in heat/persulfate-based degradation of wastewater contaminants

Yang, Fei; Sheng, Bo; Wang, Zhaohui; Yuan, Ruixia; Xue, Ying; Wang, Xiaoxiao; Liu, Qingze; Liu, Jianshe

doi:10.1016/j.envint.2019.104918

Cited by 37 publications

(9 citation statements)

References 67 publications

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“…The presence of bromide results in both an increased rate of micropollutant degradation [78,79] and no or detrimental effects depending on the micropollutant and the experimental conditions [80]. However, Hua et al [81] showed that the presence of bromide during UV/chlorination of wastewater effluents induced a decrease of the acute toxicity and genotoxicity of the treated effluents despite the increase of toxic brominated DBPs.…”

Section: The Beneficial Effects Of Halide On Dbp Formation Bromide-catalysed Iodate Formation and Mitigation Of I-dbpsmentioning

confidence: 99%

Influence of bromide and iodide on the formation of disinfection by-products in drinking water treatment

Criquet

Allard

2021

Analysis and Formation of Disinfection Byproducts in Drinking Water

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Section: The Beneficial Effects Of Halide On Dbp Formation Bromide-catalysed Iodate Formation and Mitigation Of I-dbpsmentioning

confidence: 99%

Influence of bromide and iodide on the formation of disinfection by-products in drinking water treatment

Criquet

Allard

2021

Analysis and Formation of Disinfection Byproducts in Drinking Water

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“…In addition, a lower energy consumption, 26.4 kWh/(kg TOC), was needed in the process. Yang, Sheng, et al (2019) studied the impact of halide (chloride or bromide) on the removals of phenol, benzoic acid, coumarin, and Acid Orange 7 (AO7) in the heat/persulfate (PS) process. Cl − had an inhibition effect, followed by an improvement effect, for organic pollutants removal, while Br − had little effect within the tested range (0-0.2 mM).…”

Section: Annual Literature Reviewmentioning

confidence: 99%

Physico‐chemical processes

Yu¹,

Yao²,

Pan³

et al. 2020

Water Environment Research

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By summarizing 187 relevant research articles published in 2019, the review is focused on the research progress of physicochemical processes for wastewater treatment. This review divides into two sections, physical processes and chemical processes. The physical processes section includes three subsections , that is, adsorption, granular filtration, and dissolved air flotation, whereas the chemical processes section has five subsections , that is, coagulation/flocculation, advanced oxidation processes, electrochemical, capacitive deionization, and ion exchange.

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“…Besides that, anions in the actual water could also react with radicals to reduce the micropollutant removal efficiency. For instance, the SO 4 •– could directly oxidize halide ions like Cl – to form Cl• through one-electron abstraction, , which has lower redox potential than •OH and SO 4 •– . Moreover, the oxyanions like phosphate and bicarbonate can scavenge •OH and SO 4 •– to generate anion-derived radicals, and this effect became more obvious when the pH was higher than the p K a of the corresponding acid of anions .…”

Section: Introductionmentioning

confidence: 99%

“…•− could directly oxidize halide ions like Cl − to form Cl• through one-electron abstraction, 15,16 which has lower redox potential than •OH and SO 4…”

Section: ■ Introductionmentioning

confidence: 99%

Undiscovered Multiple Roles of Multivalent Cations in the Pollutant Removal from Actual Water by Persulfate Activated by Carbon Materials

et al. 2021

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Enormous works have focused on the influence of natural organic matter (NOM) and anions (e.g., Cl − and HCO 3 − ) on the pollutant removal efficiency by persulfate activation technologies. However, the impact of multivalent cations in actual water, e.g., Ca 2+ , on the pollutant removal has been overlooked in past research. In this work, we surprisingly found that pollutant degradation by the carbon materials activating persulfate in some actual water (e.g., groundwater) was higher than that in the buffer solution, and the bridging effect of multivalent cations in the actual water was the main reason. Through the bridging effect of multivalent cations, persulfate was bound on the surface of carbon materials to accelerate its decomposition. However, the promotion mechanism of multivalent cations on the radical and nonradical pathways of persulfate activation was different. Furthermore, the NOM aggregation was also promoted by multivalent cations, thereby inhibiting its quenching effect on the pollutant degradation. Besides that, these multivalent cations could lead to the coagulation of carbon materials, which was harmful for its catalytic performance. This work highlights the multiple roles of multivalent cations in the actual water in the persulfate activated by the carbon material process, and it was conducive to the practical application of Fenton-like technologies in actual water treatment.

show abstract

An often-overestimated adverse effect of halides in heat/persulfate-based degradation of wastewater contaminants

Cited by 37 publications

References 67 publications

Influence of bromide and iodide on the formation of disinfection by-products in drinking water treatment

Influence of bromide and iodide on the formation of disinfection by-products in drinking water treatment

Physico‐chemical processes

Undiscovered Multiple Roles of Multivalent Cations in the Pollutant Removal from Actual Water by Persulfate Activated by Carbon Materials

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