Critical review of advanced oxidation processes in organic wastewater treatment

Ma, Dengsheng; Yi, Huan; Lai, Cui; Liu, Xigui; Huo, Xiuqin; An, Zhe; Ling, Li; Fu, Yukui; Li, Bisheng; Zhang, Mingming; Qin, Lei; Liu, Shiyu; Liu, Yang

doi:10.1016/j.chemosphere.2021.130104

Cited by 470 publications

(167 citation statements)

References 259 publications

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“…Despite being an efficient technology, they have their own limitations in terms of practical application. Two factors that limit its wide application are hard reaction conditions and high treatment costs [111]. In addition, degradation of organic pollutants leads to formation of by-products, which may be more toxic than the original contaminants.…”

Section: Discussionmentioning

confidence: 99%

“…The combined MBR and H 2 O 2 /UV process applied to urban wastewater allowed high removal efficiencies of over 95% for carbamazepine and up to 98% for ibuprofen, resulting in complete removal for ciprofloxacin [1]. Studies seem to determine that in terms of contaminants degradation, the efficiency of combined processes of AOPs and biological treatments is higher than that of single AOPs [111].…”

Section: Discussionmentioning

confidence: 99%

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Effectiveness of Advanced Oxidation Processes in Wastewater Treatment: State of the Art

Bermúdez

Martín-Pascual

Martínez

et al. 2021

Water

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In recent years, many scientific studies have focused their efforts on quantifying the different types of pollutants that are not removed in wastewater treatment plants. Compounds of emerging concern (CECs) have been detected in different natural environments. The presence of these compounds in wastewater is not new, but they may have consequences in the future. These compounds reach the natural environment through various routes, such as wastewater. This review focuses on the study of tertiary treatment with advanced oxidation processes (AOPs) for the degradation of CECs. The main objective of the different existing AOPs applied to the treatment of wastewater is the degradation of pollutants that are not eliminated by means of traditional wastewater treatment.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effectiveness of Advanced Oxidation Processes in Wastewater Treatment: State of the Art

Bermúdez

Martín-Pascual

Martínez

et al. 2021

Water

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“…These OH radicals are extremely reactive oxidizers (oxidation potential of the OH radical is approximately, E θ = 2.8 V) and non-selective towards organic pollutants in wastewater [5]. AOPs can be considered versatile technologies, as they provide different possible alternatives to produce OH radicals [6]. AOPs, compared to conventional water treatment techniques, have a greater efficiency and capacity to degrade recalcitrant organic pollutants, and can generate less toxic intermediate products during their degradation [7].…”

Section: Introductionmentioning

confidence: 99%

Advanced Oxidation Processes Coupled with Nanomaterials for Water Treatment

Cardoso

Silva

2021

Nanomaterials

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Water quality management will be a priority issue in the near future. Indeed, due to scarcity and/or contamination of the water, regulatory frameworks will be increasingly strict to reduce environmental impacts of wastewater and to allow water to be reused. Moreover, drinking water quality standards must be improved in order to account for the emerging pollutants that are being detected in tap water. These tasks can only be achieved if new improved and sustainable water treatment technologies are developed. Nanomaterials are improving the ongoing research on advanced oxidation processes (AOPs). This work reviews the most important AOPs, namely: persulfate, chlorine and NH2Cl based processes, UV/H2O2, Fenton processes, ozone, and heterogeneous photocatalytic processes. A critical review of the current coupling of nanomaterials to some of these AOPs is presented. Besides the active role of the nanomaterials in the degradation of water contaminants/pollutants in the AOPs, the relevance of their adsorbent/absorbent function in these processes is also discussed.

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“…For these reasons, it is important to develop new materials and strategies for the environmental remediation and water purification. By the way, among the advanced oxidation processes (AOPs), the photocatalysis is one of the most investigated, due to its good performance, biocompatibility, and low-cost implementation [5,6].…”

Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis of TiO2-rGO Photocatalysts for the Degradation of Groundwater Pollutants

et al. 2021

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A non-conventional approach to prepare titanium dioxide-reduced graphene oxide (TiO2-rGO) nanocomposites based on solar photoreduction is here presented. The standard hydro-solvothermal synthesis of the TiO2-rGO composites requires high temperatures and several steps, whereas the proposed one-pot preparation allows one to obtain the photocatalysts with a simple and green procedure, by exploiting the photocatalytic properties of titania activated by the solar irradiation. The TiO2-rGO catalysts were tested in the solar photodegradation of a widely adopted toxic herbicide (2,4-Dichlorophenoxyacetic acid, 2,4-D), obtaining the 97% of degradation after 3 h of irradiation. The as-prepared TiO2-rGO composites were more active compared to the same photocatalysts prepared through the conventional thermal route. The structural, optical, and textural properties of the composites, determined by Raman, Photoluminescence, Fourier Transform InfraRed (FTIR), UV-vis diffuse reflectance (DRS) spectroscopies, and N2 absorption-desorption measurements, showed as the solar irradiation favors the reduction of graphene oxide with higher efficiency compared to the thermal-driven synthesis. Furthermore, the possible toxicity of the as-synthesized composites was measured exposing nauplii of microcrustacean Artemia sp. to solutions containing TiO2-rGO. The good results in the 2,4-D degradation process and the easiness of the TiO2-rGO synthesis allow to consider the proposed approach a promising strategy to obtain performing photocatalysts.

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Critical review of advanced oxidation processes in organic wastewater treatment

Cited by 470 publications

References 259 publications

Effectiveness of Advanced Oxidation Processes in Wastewater Treatment: State of the Art

Effectiveness of Advanced Oxidation Processes in Wastewater Treatment: State of the Art

Advanced Oxidation Processes Coupled with Nanomaterials for Water Treatment

One-Pot Synthesis of TiO2-rGO Photocatalysts for the Degradation of Groundwater Pollutants

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