Removal efficiency of organic micropollutants in successive wastewater treatment steps in a full-scale wastewater treatment plant: Bench-scale application of tertiary treatment processes to improve removal of organic micropollutants persisting after secondary treatment

Choi, Sangki; Yoom, Hoon-Sik; Son, Hee-Jong; Seo, Chang-Dong; Kim, Kyunga; Lee, Yunho; Kim, Young Mo

doi:10.1016/j.chemosphere.2021.132629

Cited by 31 publications

(8 citation statements)

References 38 publications

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“…The correlations of carbamazepine and metformin with ∑Phs in surface water is compared in 717 global water samples to assess their performance to indicate anthropogenic pharmaceutical contamination. ,,,,,,,,,,, The correlation of carbamazepine with ∑Phs is stronger (ρ = 0.74, p < 0.0001) than that of caffeine (ρ = 0.62, p < 0.0001) but slightly weaker than that of metformin (ρ = 0.76, p < 0.0001) (Figure S10). The more ready biodegradation (45–99%), higher detection frequency (66–100%), and heavier environmental concentration (up to 1180 μg/L) of metformin than carbamazepine (<10%, 58–95%, up to 10 μg/L) seem to well favor the better performance of metformin as an indicator of human pharmaceutical contamination. ,,,,, …”

Section: Metformin As An Indicator Of Human Pharmaceutical Contaminationmentioning

confidence: 99%

“…The more ready biodegradation (45− 99%), higher detection frequency (66−100%), and heavier environmental concentration (up to 1180 μg/L) of metformin than carbamazepine (<10%, 58−95%, up to 10 μg/L) seem to well favor the better performance of metformin as an indicator of human pharmaceutical contamination. 12,25,47,52,127,131 In summary, depending on the available data in wastewater influents/effluents, stormwater and surface water, metformin is demonstrated to be a reliable indicator of pharmaceutical contamination in aquatic systems on both regional and national scales. This statistical relationship not only supports metformin being an alternative or superior indicator to caffeine, sucralose, and carbamazepine but may also provide predictions of contamination levels of pharmaceuticals based on metformin monitoring data.…”

Section: Compared With Othermentioning

confidence: 99%

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Metformin Contamination in Global Waters: Biotic and Abiotic Transformation, Byproduct Generation and Toxicity, and Evaluation as a Pharmaceutical Indicator

Zhang

2022

Environ. Sci. Technol.

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Metformin is the first-line antidiabetic drug and one of the most prescribed medications worldwide. Because of its ubiquitous occurrence in global waters and demonstrated ecotoxicity, metformin, as with other pharmaceuticals, has become a concerning emerging contaminant. Metformin is subject to transformation, producing numerous problematic transformation byproducts (TPs). The occurrence, removal, and toxicity of metformin have been continually reviewed; yet, a comprehensive analysis of its transformation pathways, byproduct generation, and the associated change in adverse effects is lacking. In this review, we provide a critical overview of the transformation fate of metformin during water treatments and natural processes and compile the 32 organic TPs generated from biotic and abiotic pathways. These TPs occur in aquatic systems worldwide along with metformin. Enhanced toxicity of several TPs compared to metformin has been demonstrated through organism tests and necessitates the development of complete mineralization techniques for metformin and more attention on TP monitoring. We also assess the potential of metformin to indicate overall contamination of pharmaceuticals in aquatic environments, and compared to the previously acknowledged ones, metformin is found to be a more robust or comparable indicator of such overall pharmaceutical contamination. In addition, we provide insightful avenues for future research on metformin.

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Section: Metformin As An Indicator Of Human Pharmaceutical Contaminationmentioning

confidence: 99%

Section: Compared With Othermentioning

confidence: 99%

Metformin Contamination in Global Waters: Biotic and Abiotic Transformation, Byproduct Generation and Toxicity, and Evaluation as a Pharmaceutical Indicator

Zhang

2022

Environ. Sci. Technol.

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“…The purification processes include several stages based on the combination of physical, chemical and biological techniques such as coagulation, flocculation, ion exchange, membrane separation and electrochemical methods. [87,[89][90][91][92] However, the use of conventional processes in wastewater treatment plants do not completely remove recalcitrant pollutants and they end up consequently in the environment. As a result, pharmaceuticals as an example of these pollutants could be found in receiving surface water.…”

Section: Conventional Waste Water Treatmentmentioning

confidence: 99%

A Comprehensive Review on Modification of Titanium Dioxide‐Based Catalysts in Advanced Oxidation Processes for Water Treatment

Tanos,

Razzouk,

Lesage

et al. 2023

ChemSusChem

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It has become necessary to develop effective strategies to prevent and reduce water pollution as a result of the increase in dangerous pollutants in water reservoirs. Consequently, there is a need to design new catalyst materials to promote the efficiency of advanced oxidation processes (AOPs) in the field of wastewater treatment plant to ensure the mineralization of trace organic contaminants. A notable approach gaining attention involves the coupling of sulfate radicals‐based AOPs to photocatalysis or electrocatalysis processes, aiming to achieve the complete removal of refractory contaminants into water and carbon dioxide. Titanium dioxide as metal oxide has received great attention for its catalytic application in water purification. TiO2 catalysts offer a multitude of advantages in AOPs. They are characterized by their high photocatalytic activity under both ultraviolet and visible light, making them environmentally friendly due to the absence of toxic byproducts during oxidation. Their versatility is remarkable, finding utility in various AOPs, from photocatalysis to photo‐Fenton processes. TiO2′s durability ensures long‐lasting catalytic activity, which is crucial for continuous treatment processes, and their cost‐effectiveness is particularly advantageous. Furthermore, their chemical stability allows it to withstand varying pH conditions. However, the large band gap energy and low electrical conductivity hinder the catalytic reaction effectiveness. This review aims to examine various approaches to enhance the catalytic performance of titanium dioxide, with the objective of enabling more efficient water purification methods.

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“…Table S3: Method characteristics for the analysis of total N and P. Table S4: Method characteristics. References [33][34][35][36][37][38][39][40][41][42][43] are cited in the supplementary materials.…”

Section: Supplementary Materialsmentioning

confidence: 99%

Advanced Treatment of the Municipal Wastewater by Lab-Scale Hybrid Ultrafiltration

et al. 2023

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In this study, hybrid ultrafiltration which involves adsorption onto activated carbon and/or coagulation was tested for the removal of ibuprofen, caffeine and diclofenac from the municipal wastewater treatment plant effluent (c0 = 2–3 µg/L). Ultrafiltration was tested in combination with powdered activated carbon dose of 5 mg/L separately or with coagulants (FeCl3, dose 4 mg Fe (III)/L and, natural coagulant isolated from bean seeds, dose 33 µL/L). In addition to the removal of organic micropollutants, the removal of As, Cr, Cu and Zn was also tested (c0~100 µg/L). The research was conducted on a laboratory pilot plant (capacity 30 L/h, in-out dead-end filtration, flux of 80 L/m2h). The best results were obtained for caffeine when adsorption on PAC is combined with a FeCl3 (removal efficiency 42–87%). The addition of a natural coagulant did not show benefits for the removal of organic micropollutants compared to the other tested processes, but both coagulants had similar effects on the content of metals and As Hybrid membrane processes proved to be the most efficient for Zn (44–87%) and Cr (33–87%) removal. The lowest efficiency was determined for As (˂19%). Ultrafiltration with PAC and coagulants removed 5–33% of effluent organic matter, depending on the type of coagulant; 57–87% of total nitrogen and PAC/FeCl3/UF was also partially effective for removing total phosphorus (11–39%).

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Removal efficiency of organic micropollutants in successive wastewater treatment steps in a full-scale wastewater treatment plant: Bench-scale application of tertiary treatment processes to improve removal of organic micropollutants persisting after secondary treatment

Cited by 31 publications

References 38 publications

Metformin Contamination in Global Waters: Biotic and Abiotic Transformation, Byproduct Generation and Toxicity, and Evaluation as a Pharmaceutical Indicator

Metformin Contamination in Global Waters: Biotic and Abiotic Transformation, Byproduct Generation and Toxicity, and Evaluation as a Pharmaceutical Indicator

A Comprehensive Review on Modification of Titanium Dioxide‐Based Catalysts in Advanced Oxidation Processes for Water Treatment

Advanced Treatment of the Municipal Wastewater by Lab-Scale Hybrid Ultrafiltration

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