Removal of Pharmaceuticals and Personal Care Products (PPCPs) by Free Radicals in Advanced Oxidation Processes

Jiao, Jiao; Li, Yihua; Song, Qi; Wang, Liujin; Luo, Tingwei; Gao, Changfei; Liu, Lifen; Yang, Shengnan

doi:10.3390/ma15228152

Cited by 16 publications

(4 citation statements)

References 179 publications

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“…Stannic oxide nanoparticles functionalized with gallic acid has been shown to be a promising photocatalyst due to its high oxidation potential, photo absorption ability, surface reactivity, chemical inertness, relative nontoxicity, and long-term photochemical stability [61]. Disadvantages, however, include the difficulty in achieving uniform radiation over the entire catalyst surface on a larger scale and the need for a subsequent separation treatment to regenerate the catalyst, which increases the total cost of the process [50].…”

Section: Photo(cata)lysismentioning

confidence: 99%

Selected Micropollutants Removal from Municipal Wastewater

Derco,

Žgajnar Gotvajn,

Guľašová

et al. 2024

Preprint

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Micropollutants belongs to various groups of chemicals. One of the most diverse and large group of them are pharmaceuticals. The presence of pharmaceutical residues in wastewater poses a significant challenge to water quality and environmental health. This paper provides an overview of recent advancements in the removal of pharmaceuticals from water, focusing on various treatment processes and their effectiveness in eliminating micropollutants. Through a review of literature, including studies on ozonation, UV irradiation, sulphate radical-based tech-nologies, and photocatalytic processes, insights into degradation mechanisms and optimal con-ditions for their removal are synthesized. Additionally, with new legislation mandating the monitoring of selected micropollutants and the implementation of quaternary treatment in wastewater treatment plants, the paper discusses prospects for future research and recommen-dations for effective pharmaceuticals removal. Key actions include conducting comprehensive laboratory and pilot trials, implementing quaternary treatment of wastewaters, continuously monitoring of water quality, investing in research and development, and promoting collabora-tion and knowledge sharing among stakeholders. By embracing these strategies, we can work towards safeguarding water resources and protecting public health from the adverse effects of pharmaceutical contamination.

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Section: Photo(cata)lysismentioning

confidence: 99%

Selected Micropollutants Removal from Municipal Wastewater

Derco,

Žgajnar Gotvajn,

Guľašová

et al. 2024

Preprint

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“…The disclosure of the problem initiated a number of scientific studies focused on finding technical and material solutions to increase the effectiveness of pharmaceuticals that resistant to degradation [ 40 , 41 ]. The most frequently mentioned alternatives are adsorption [ 42 , 43 , 44 ], membrane separation [ 45 , 46 , 47 ], and advanced oxidation processes [ 48 , 49 , 50 ], as well as hybrid methods [ 51 ]. Currently, the highest removal efficiency is achieved by ozonation processes and treatment with activated carbon [ 52 ].…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Diclofenac Removal Using Activated Sludge in a Dynamic System (SBR Reactor) with Variable Parameters of pH, Concentration, and Sludge Oxygenation

et al. 2023

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Recently, traditional wastewater treatment systems have not been adapted to remove micropollutants, including pharmaceutical substances, which, even at low concentrations, cause adverse changes in aquatic and terrestrial living organisms. The problem of drug residues in the environment has been noticed; however, no universal legal regulations have been established for concentrations of these compounds in treated wastewater. Hence, the aim of the article was to determine the possibility of increasing the efficiency of diclofenac removal from activated sludge using the designed SBR reactor. This study included six cycles, working continuously, where each of them was characterized by changing conditions of pH, oxygenation, and composition of the synthetic medium. In each cycle, three concentrations of diclofenac were analyzed: 1 mg/L, 5 mg/L, 10 mg/L for the hydraulic retention time (HRT) of 4 d and the sludge retention time (SRT) of 12 d. The highest removal efficiency was achieved in the first test cycle for pH of natural sediment at the level of 6.7–7.0 (>97%), and in the third test cycle at pH stabilized at 6.5 (>87%). The reduced content of easily assimilable carbon from synthetic medium indicated a removal of >50%, which suggests that carbon in the structure of diclofenac restrained microorganisms to the rapid assimilation of this element. Under half-aerobic conditions, the drug removal effect for a concentration of 10 mg/L was slightly above 60%.

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“…To increase the removal effectiveness, alternative methods such as adsorption [24][25][26], membrane separation [27], advanced oxidation processes [28][29][30], or combined systems [31,32] have been applied. Wastewater treatment employing high-pressure membrane technologies demonstrated that the effectiveness of pharmaceutical removal during microfiltration and ultrafiltration processes is comparatively limited due to the pore size of these membranes being significantly larger than the molecules of pharmaceuticals [33].…”

Section: Introductionmentioning

confidence: 99%

Cross-Linked Cationic Starch Microgranules for Removal of Diclofenac from Aqueous Systems

Navikaite-Snipaitiene,

Andriunaite,

Rosliuk

et al. 2023

Water

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The occurrence of pharmaceuticals, such as anti-inflammatories, antibiotics, antidepressants, antihistamines, and others in the effluents, is a very urgent problem and a big challenge for municipal wastewater treatment companies. Without special treatment, these microcontaminants are retained in discharged water and sewage sludge and this is a high threat to the environment. Cross-linked cationic starch (CLCS) adsorbents with various degrees of substitution (DS) of cationic groups were employed for the removal of diclofenac from aqueous systems. The equilibrium adsorption studies revealed that the driving force of adsorption was the electrostatic interaction between carboxylate groups of diclofenac and quaternary ammonium groups of CLCS. The sorption capacities of CLCS with DS of 0.21 (CLCS-0.21) and DS of 0.33 (CLCS-0.33) varied from 329 to 370 mg/g and from 597 to 684 mg/g, respectively. The release studies revealed that adsorbed diclofenac can be efficiently released into 0.25 mol/L NaCl solution. Adsorbent regeneration studies showed that after four regeneration cycles, the ability of CLCS-0.21 and CLCS-0.33 to remove diclofenac from the aqueous medium decreased by 6% and 3%, respectively. To conclude, CLCS-0.33 exhibited high absorption capacity and sustainability due to good recoverability properties and can be regarded as a promising microcontaminant adsorbent to be used in wastewater treatment processes.

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Removal of Pharmaceuticals and Personal Care Products (PPCPs) by Free Radicals in Advanced Oxidation Processes

Cited by 16 publications

References 179 publications

Selected Micropollutants Removal from Municipal Wastewater

Selected Micropollutants Removal from Municipal Wastewater

Efficiency of Diclofenac Removal Using Activated Sludge in a Dynamic System (SBR Reactor) with Variable Parameters of pH, Concentration, and Sludge Oxygenation

Cross-Linked Cationic Starch Microgranules for Removal of Diclofenac from Aqueous Systems

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