Peroxymonosulfate/base process in saline wastewater treatment: The fight between alkalinity and chloride ions

Yang, Fei; Huang, Ying; Fang, Changling; Xue, Ying; Ai, Luoyan; Liu, Jianshe; Wang, Zhaohui

doi:10.1016/j.chemosphere.2018.02.023

Cited by 99 publications

(21 citation statements)

References 30 publications

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“…Wang et al used the Cl − /PMS process for the treatment of coking wastewater concentrate, in which 1 O 2 , hypochlorous acid and chlorine radicals were identified [50]. They discovered that the efficiency of the PMS/base/Cl − system was vastly influenced by the dosage of Cl − and NaOH [51]. The degradation of model pollutant was remarkably enhanced by Cl − at low alkalinity, but inhibited when NaOH concentration was up to 2 mM.…”

Section: Evolution Of 1 O 2 By Activating Pds/pms In Homogenous Systemsmentioning

confidence: 99%

Evolution of Singlet Oxygen by Activating Peroxydisulfate and Peroxymonosulfate: A Review

Xiao

Faheem

et al. 2021

IJERPH

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Advanced oxidation processes (AOPs) based on peroxydisulfate (PDS) or peroxymonosulfate (PMS) activation have attracted much research attention in the last decade for the degradation of recalcitrant organic contaminants. Sulfate (SO4•−) and hydroxyl (•OH) radicals are most frequently generated from catalytic PDS/PMS decomposition by thermal, base, irradiation, transition metals and carbon materials. In addition, increasingly more recent studies have reported the involvement of singlet oxygen (1O2) during PDS/PMS-based AOPs. Typically, 1O2 can be produced either along with SO4•− and •OH or discovered as the dominant reactive oxygen species (ROSs) for pollutants degradation. This paper reviews recent advances in 1O2 generation during PDS/PMS activation. First, it introduces the basic chemistry of 1O2, its oxidation properties and detection methodologies. Furthermore, it elaborates different activation strategies/techniques, including homogeneous and heterogeneous systems, and discusses the possible reaction mechanisms to give an overview of the principle of 1O2 production by activating PDS/PMS. Moreover, although 1O2 has shown promising features such as high degradation selectivity and anti-interference capability, its production pathways and mechanisms remain controversial in the present literatures. Therefore, this study identifies the research gaps and proposes future perspectives in the aspects of novel catalysts and related mechanisms.

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Section: Evolution Of 1 O 2 By Activating Pds/pms In Homogenous Systemsmentioning

confidence: 99%

Evolution of Singlet Oxygen by Activating Peroxydisulfate and Peroxymonosulfate: A Review

Xiao

Faheem

et al. 2021

IJERPH

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“…•− [39]. The degradation efficiency of 850CC/PMS decreases sharply when pH is higher than 11.04, which indicates that SO 4…”

Section: Effects Of Various Parameters On the Degradation Of Rhbmentioning

confidence: 96%

“…Furthermore, in a strong acidic environment, H + can sca enge the generation of active oxygen species, resulting in a dramatic decrease in the de radation efficiency [38]. Besides, it is known that under strong alkaline condition, a lot SO5 2− are generated from PMS, which prevents the formation of SO4 •− [39]. The degradatio efficiency of 850CC/PMS decreases sharply when pH is higher than 11.04, which indicat The influence of 850CC dosages on the RhB degradation is displayed in Figure 5b.…”

Section: Effects Of Various Parameters On the Degradation Of Rhbmentioning

confidence: 99%

Activation of Peroxymonosulfate by Chrysotile to Degrade Dyes in Water: Performance Enhancement and Activation Mechanism

et al. 2021

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An environmentally friendly activation method of peroxymonosulfate (PMS) provides a promising advanced oxidation processes for the degradation of organic wastewater. In this article, chrysotile, extracted from asbestos tailings, was found to be a kind of one-off catalyst relying on hydroxyl groups to activate PMS. Furthermore, the activation performance of the chrysotile had been greatly improved by the mean of calcining at 850 °C (850CC). It is worth mentioning that 850CC could not only realize three effective cycles, but also the mineralization ratio of Rhodamine B (RhB) could be impressively higher than 60%. According to characterization results, it was discovered that the chrysotile had transformed into forsterite with a fibrous morphology after calcination at 850 °C due to the loss of hydroxyl groups and the recombination of silicon, oxygen and magnesium atoms. Besides, the main active species produced by 850CC activating PMS were singlet oxygen and sulfate radicals. Further studies uncovered that PMS was successfully activated by a large number of unsaturated coordination oxygen on 850CC surface, and the activation mechanism was further elucidated. This study provides a new route for the comprehensive utilization of chrysotile and a valuable strategy for the degradation of hazardous organic pollutants in wastewater by PMS activation.

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“…[31] These scavengers were chosen based on their reaction rate constants with the targeted radicals such as for p-BQ (kp-BQ-O2•-= 0.9-1.0×10 9 M -1 .s -1 ), phenol (kPheOH-SO4•-= 8.8×10 9 M -1 .s -1 and k PheOH-HO• = 6,6×10 9 M -1 .s -1 ), TBA (kTBA-HO• = 3.8-7.6×10 8 M -1 .s -1 and k TBA-SO4•-= 4.0-9.1×10 5 M -1 .s -1 ), and FFA (kFFA-1 O2 = 1.2×10 8 M -1 s -1 and k FFA-HO• = 1.5×10 10 M −1 s -1 ). [36] Figure 9 demonstrates the effect of radical scavenging on glyphosate decomposition. Without scavengers, the decomposition efficiency reached 99.54 % after 6 min.…”

Section: Mechanism Of Glyphosate Decomposition Using Cucofe-ldh and Pmsmentioning

confidence: 99%

Decomposition of glyphosate in water by peroxymonosulfate activated with CuCoFe‐LDH material

Dung,

Thao,

Huy

2021

Vietnam Journal of Chemistry

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In this study, the CuCoFe‐layered double hydroxide was employed for the degradation of glyphosate in water via peroxymonosulfate (PMS) activation. Scanning electron microscopy, X‐ray powder diffraction, energy‐dispersive X‐ray spectroscopy, Fourier‐transform infrared spectroscopy, and Brunauer‐Emmett‐Teller analyses were used to characterize the material. The effects of the catalytic system, initial solution pH, and catalyst and PMS dose on the degradation efficiency of glyphosate were investigated. The results indicated that after 6 min the CuCoFe‐LDH/PMS system can degrade 99.54 % of glyphosate (100 mg/L) using 100 mg/L of CuCoFe‐LDH, 200 mg/L of PMS, and pH 11. In addition, radical quenching experiments prove that the reactive oxygen species (e.g., SO4●‐, HO●, O2●–, and 1O2) are formed and SO4●‐ plays a decisive role in glyphosate degradation. Moreover, the CuCoFe‐LDH catalyst is reusable and stable with a glyphosate removal efficiency of 90.34 % after five continuous degradation cycles.

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Peroxymonosulfate/base process in saline wastewater treatment: The fight between alkalinity and chloride ions

Cited by 99 publications

References 30 publications

Evolution of Singlet Oxygen by Activating Peroxydisulfate and Peroxymonosulfate: A Review

Evolution of Singlet Oxygen by Activating Peroxydisulfate and Peroxymonosulfate: A Review

Activation of Peroxymonosulfate by Chrysotile to Degrade Dyes in Water: Performance Enhancement and Activation Mechanism

Decomposition of glyphosate in water by peroxymonosulfate activated with CuCoFe‐LDH material

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