Ozonation of organic compounds in water and wastewater: A critical review

Lim, Sungeun; Shi, Jiaming; Gunten, Urs von; McCurry, Daniel L.

doi:10.1016/j.watres.2022.118053

Cited by 273 publications

(125 citation statements)

References 330 publications

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“…Usually, a very small ozone residual is maintained until disinfection is complete, at which point, all ozone disappears; a small chlorine dose is also added at this point to keep a residual in the distribution system. Additional advantages of ozonation for this application include its capability of decreasing chlorinated disinfection by-products [74] , the excellent water quality aesthetics (including odour, colour, taste, turbidity) it confers post-treatment [75] , and the exceptional capability to degrade a series of emerging contaminants that threaten water supplies [76] , [77] . For these reasons, ozone has been more widely considered in drinking water than wastewater treatment.…”

Section: Industrial Applications Of Ozonementioning

confidence: 99%

“…These tend to have a high chemical oxygen demand, a low biological oxygen demand, and a low biodegradability index and are usually resistant to biological treatments. Effective mineralisation of these compounds by ozone is important for wastewater reclamation; however, achieving full mineralisation at an industrial scale will be extremely difficult, as the ozone dosage requirements will be too high to achieve economically [76] . Thus, ozone may be applied to break these compounds into others that can be further degraded by the microorganisms in the wastewater treatment process [86] , [87] , [88] .…”

Section: Industrial Applications Of Ozonementioning

confidence: 99%

See 1 more Smart Citation

Ozone application in different industries: A review of recent developments

Epelle

MacFarlane²,

Cusack³

et al. 2023

Chemical Engineering Journal

101

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Section: Industrial Applications Of Ozonementioning

confidence: 99%

Section: Industrial Applications Of Ozonementioning

confidence: 99%

Ozone application in different industries: A review of recent developments

Epelle

MacFarlane²,

Cusack³

et al. 2023

Chemical Engineering Journal

101

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“…Knowledge gaps still exist for ozonation reaction kinetics and mechanisms for Sulfur (S) and Nitrogen (N) containing moieties. In S-containing moieties (thiols, thioethers, and disulfides), the formation of a sulfoxide (SO) has been proposed as the most common functional group (Dodd et al, 2010), but only limited knowledge about the possible subsequent reactions to form sulfone (SO2), sulfonic acid (SO3H), and sulfate (SO4 2-) is available (Lim et al, 2022). For N-containing moieties, there is uncertainty in the case of secondary amines, where, although hydroxylamines were suggested as a major product, studies have shown that this might be only an intermediate and nitro-alkanes are the major OP (Lim et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Isotopically labeled ozone: a new approach to elucidate the formation of ozonation products

Olea¹,

Kölle²,

Bein³

et al. 2023

Preprint

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As ozonation becomes a widespread treatment for removal of trace organic chemicals in wastewater treatment plant effluents, there are increasing concerns regarding the formation of ozonation transformation products (OPs), and their possible impacts on the aquatic environment and eventually human health. In this study, a novel method was developed that utilizes the heavy oxygen isotope (18O) for the production of heavy ozone ([18O1]O2, [18O2]O1, [18O3]) to actively label OPs from oxygen transfer reactions. To establish and validate this new approach, venlafaxine with a well-described oxygen transfer reaction (tertiary amine -> N-oxide) was chosen as a model compound. Observed 18O/16O ratios in the major OP venlafaxine N-oxide (NOV) correlated with expected 18O purities based on previous tracer experiments. These results confirmed the successful labeling with heavy oxygen and furthermore demonstrate the potential to monitor NOV as an indicator of 18O/16O ratios during ozonation. As a next step, 18O/16O ratios were used to elucidate the formation mechanism of previously described OPs from sulfamethoxazole (SMX). Seven OPs were detected including the frequently described nitro-SMX, which was formed with a maximum yield of 3.2% (of initial SMX). With the successful labeling of six of the seven OPs from sulfamethoxazole, it was possible to confirm their previously proposed formation pathways, and distinguish oxygen transfer from electron transfer reactions. OPs 18O/16O ratios indicate that hydroxylation of the aromatic ring and formation of nitro-groups mostly follows oxygen transfer reactions, while electron transfer reactions initiate the formation of hydroxylamine and the abstraction of NH2 leading to catechol.

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“…Traditional treatment methods cannot make significant changes in their chemistry or concentration since they are based on transfer from one phase to another, leaving pollution problem solutions for further generations. A variety of physico-chemical methodologies are proposed for the removal of different organic pollutants from industrial waste, such as membrane bioreactors 15 , electrochemical treatment 16 , nanofiltration 17 , biological methods 18 , coagulation/flocculation 19 , 20 , adsorption 21 , chemical oxidation 22 , reaction with ozone 23 , and membrane processes 24 . However, several technical problems appeared.…”

Section: Introductionmentioning

confidence: 99%

Copper sulfide and zinc oxide hybrid nanocomposite for wastewater decontamination of pharmaceuticals and pesticides

Mohammed

Ali

Gomaa

et al. 2022

Sci Rep

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In this work, hybrid nanocomposites of CuS QDs @ ZnO photocatalysts are fabricated through a facile microwave-assisted (MW) hydrothermal method as a green preparation process. The prepared photocatalysts (PCs) are employed under simulated sunlight (SL) for the degradation of ciprofloxacin, ceftriaxone, ibuprofen pharmaceuticals, methylene blue dye, and 2,4,5-trichlorophenoxyacetic acid (2,4-D) pesticide. The prepared photocatalysts are characterized in detail using several compositional, optical, and morphological techniques. The influence of the CuS (QDs) wt. % on morphological, structural, as well as photocatalytic degradation efficiency have been investigated. The small displacement between the (107) plane of CuS and the (102) plane of ZnO can confirmed the existence of lattice interaction, implying the formation of p-n heterojunctions. TEM and XRD results demonstrated that the CuS QDs are established and uniformly decorated on the surface of ZnO NRs, confirming the forming of an efficient CuS QDs @ ZnO heterojunction nanostructures. The CuS QDs @ ZnO hybrid nanocomposites showed enhancement in crystallinity, light absorption, surface area, separation of e–h pair and inhibition in their recombination at an interfacial heterojunction. In addition it is found that, 3 wt% CuS QDs @ ZnO has the foremost influence. The results showed improvement of photocatalytic activity of the 3% CuS QDs @ ZnO hybrid nanocomposite as compared to the bare ZnO nanorods. The impressive photocatalytic performance of CuS @ ZnO heterostructure nanorods may be attributed to efficient charge transfer. The prepared CuS QDs @ ZnO hybrid nanocomposites exhibited 100% removal for MB dye, after 45 min, and after 60 min for ibuprofen, ciprofloxacin pharmaceuticals, and 2.4.5 trichloro phenoxy acetic acid pesticide with the catalyst amount of 0.2 g/L. Although 100% removal of ceftriaxone pharmaceutical acheived after 90 min. In addition CuS QDs @ ZnO hybrid nanocomposites exhibited complete removal of COD for ibuprofen, ceftriaxone pharmaceuticals and 2.4.5 trichloro phenoxy acetic acid pesticide after 2 h with no selectivity. Briefly, 3% CuS QDs@ZnO hybrid nanocomposites can be considered as promising photoactive materials under simulated sunlight for wastewater decontamination.

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Ozonation of organic compounds in water and wastewater: A critical review

Cited by 273 publications

References 330 publications

Ozone application in different industries: A review of recent developments

Ozone application in different industries: A review of recent developments

Isotopically labeled ozone: a new approach to elucidate the formation of ozonation products

Copper sulfide and zinc oxide hybrid nanocomposite for wastewater decontamination of pharmaceuticals and pesticides

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