Study on the mechanism of cerium oxide catalytic ozonation for controlling the formation of bromate in drinking water

Wang, Qun; Yang, Zhichao; Ma, Jun; Wang, Jiangchuan; Wang, Lin; Guo, Mingkun

doi:10.1080/19443994.2015.1079261

Cited by 17 publications

(12 citation statements)

References 47 publications

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“…The main reason was that Ce(IV) on the surface of CeO 2 is a kind of strong Lewis acid (LA) with strong complexation for some carboxyl and carbonyl groups. 28 The reduction of DOC by adsorption on the catalysts was in the sequence of CeO 2 (12.69%) > MgO (9.33%) > FeOOH (1.87%). From the aspects of catalytic ozonation and ozonation, though the removal of UV 254 by the O 3 /FeOOH process was relatively low, it exhibited a strong mineralization ability of the ltered water.…”

Section: The Changes Of Doc In the Ltered Watermentioning

confidence: 92%

“…The samples were withdrawn at different intervals and were treated followed the procedure described in our former work before determined. 28 To better evaluate the stability of the catalysts, atrazine (ATZ) was selected as a model contaminant and the degradation efficiencies of ATZ in the ltered water were compared ve times with the same load of recycled catalysts. The catalysts were reclaimed by ltration through glass ber lters and rinsed with methanol and Milli-Q water several times.…”

Section: Methodsmentioning

confidence: 99%

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Heterogeneous catalytic ozonation of natural organic matter with goethite, cerium oxide and magnesium oxide

et al. 2016

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Section: The Changes Of Doc In the Ltered Watermentioning

confidence: 92%

Section: Methodsmentioning

confidence: 99%

Heterogeneous catalytic ozonation of natural organic matter with goethite, cerium oxide and magnesium oxide

et al. 2016

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“…Recently, micro‐ and nano‐dimensional transition and non‐transition metal oxides have been widely studied as catalysts for ozonation reaction for the degradation of various organic pollutants (as shown in Table S1) ; but many of those catalysts was evident to be effective only at low and near to neutral pH. On the contrary, pH of the dye effluent of most of the textile industries roughly varies in the range of neutral to alkaline …”

Section: Introductionmentioning

confidence: 99%

Complementary Bifunctional Unique Properties of (α,β)‐PbO Nanoparticles for Efficient Catalysis and Adsorption for Water Remediation

et al. 2019

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Lead oxides (PbO) of same chemical composition, but different crystallographic properties have been developed for complementary catalytic ozonation (designated by [PbO]a) and adsorption (designated by [PbO]b) of a model dye, reactive red–120 (RR‐120) with highest possible efficiency beyond the state‐of‐the‐art of individual processes. The highest extent of decolouration (∼99% after 4 min) with kappRR-120 1.77×10−2 s−1 and mineralization (50% after 15 min) of RR‐120 at pH 10.5 was achieved by ozonation using 0.5 g/L catalyst [PbO]a consisting major fraction of α‐PbO phase (α‐PbO: β‐PbO∼4:1) in its crystal structure. Minimum adsorption of RR‐120 (∼7%) on catalyst's surface [PbO]a led to higher accessibility of O3 to free catalyst surface sites and helped to achieve highest efficiency of catalytic ozonation. On the other hand, adsorbent [PbO]b mainly consisting of β‐PbO phase (α‐PbO: β‐PbO∼1:4) with a fractional coexistence of α‐PbO phase showed excellent adsorption of RR‐120 (571 mg/g at 320 K) at pH 7.5, but it showed inferior efficiency in catalytic ozonation. Both the materials were found to be reusable and environmentally acceptable.

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“…The most applicable catalyst, as reported in the literature for the elimination of BrO 3 − formation, is CeO 2 . Wang et al [42] showed that CeO 2 can be a good inhibitor for the BrO 3 − production. However, the organic micropollutants removal efficiency by using the O 3 /CeO 2 process was rather small.…”

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confidence: 99%

Catalytic Membrane Ozonation

2021

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Catalytic membrane ozonation is a hybrid process that combines membrane filtration and catalytic ozonation. The membrane deposited with an appropriate solid material acts as catalyst. As a consequence, the catalytic membrane contactor can act simultaneously as contactor (i.e., improving the transfer/dissolution of gaseous ozone into the liquid phase), as well as reactor (i.e., oxidizing the organic compounds). It can be used in water and wastewater treatment limiting the disadvantages of membrane filtration (i.e., lower removal rates of emerging contaminants or fouling occurrence) and ozonation (i.e., selective oxidation, low mineralization rates, or bromate (BrO3−) formation). The catalytic membrane ozonation process can enhance the removal of micropollutants and bacteria, inhibit or decrease the BrO3− formation and additionally, restrict the membrane fouling (i.e., the major/common problem of membranes’ use). Nevertheless, the higher operational cost is the main drawback of these processes.

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Study on the mechanism of cerium oxide catalytic ozonation for controlling the formation of bromate in drinking water

Cited by 17 publications

References 47 publications

Heterogeneous catalytic ozonation of natural organic matter with goethite, cerium oxide and magnesium oxide

Heterogeneous catalytic ozonation of natural organic matter with goethite, cerium oxide and magnesium oxide

Complementary Bifunctional Unique Properties of (α,β)‐PbO Nanoparticles for Efficient Catalysis and Adsorption for Water Remediation

Catalytic Membrane Ozonation

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