scholarly journals Removal of Endocrine Disruptors from Urban Wastewater by Advanced Oxidation Processes (AOPs): A Review

2016 ◽  
Vol 10 (1) ◽  
pp. 151-172 ◽  
Author(s):  
Alessandra Cesaro ◽  
Vincenzo Belgiorno
Keyword(s):  
Endocrine Disruptors ◽  
Advanced Oxidation Processes ◽  
Wastewater Treatment Plants ◽  
Wide Spectrum ◽  
Aqueous Media ◽  
Advanced Oxidation ◽  
Endocrine Disrupting Compounds ◽  
Complete Removal ◽  
Oxidation Processes ◽  
Conventional Systems

Over the last years the growing presence of endocrine disrupting compounds in the environment has been regarded as a serious sanitary issue. The more and more frequent detection of these compounds in the effluents of wastewater treatment plants poses the risk associated to their persistence into the aquatic systems as well as to their adverse effects on both public health and environment. As conventional systems do not allow their efficient removal, great attention has been raised towards their possible treatment by Advanced Oxidation Processes (AOPs). They rely on the action of hydroxyl radicals, which are highly reactive species, able to oxidize recalcitrant and non-biodegradable pollutants. AOPs can either provide contaminant partial degradation or their complete removal. As their effectiveness has been proved for a wide spectrum of both organic and inorganic pollutants, they are considered a suitable option for the treatment of contaminated aqueous media, especially when combined with conventional biological processes. This paper aims at reviewing main AOPs for the removal of endocrine disruptors, in order to highlight the most important features of different technologies, thus providing their comparative assessment. To this end, a brief overview of the most frequently detected endocrine disruptor compounds was also discussed, in order to clarify their fate into the environment as well as the contamination pathways of greatest concern for human health.

scholarly journals Evaluation of the degradation potential of different advanced oxidation processes for a textile dye mixture: a kinetic study with mathematical modeling and toxicological tests

2020 ◽  
Vol 42 ◽  
pp. e7
Author(s):  
Joanna Cysneiros Silva ◽  
Rayany Magali da Rocha Santana ◽  
Graziele Elisandra do Nascimento ◽  
Alex Leandro Andrade de Lucena ◽  
Ana Maria Ribeiro Bastos da Silva ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Treatment Process ◽  
Wastewater Treatment Plants ◽  
Advanced Oxidation ◽  
Textile Dye ◽  
Rapid Decay ◽  
Oxidation Processes ◽  
First Order ◽  
Heterogeneous Processes ◽  
Brazilian Northeast

Studies and research have been developed around the world on environmental pollution. Among the most diverse types of pollutants, textile dyes have attracted attention in the Brazilian Northeast. These compounds, besides being persistent, resist to the conventional treatments applied in the wastewater treatment plants. Thus, the present study evaluated the degradation of the mixture of direct red 23, direct red 227 and direct orange 26 dyes by advanced oxidation processes (AOPs). It was observed that the homogeneous AOPs were more efficient, being able to degrade 100% of the chromophoric groups after the optimization of the variables [H2O2], [Fe] and pH. The reaction kinetics for the photo-Fenton process followed a pseudo-first order non-linear model, with rapid decay of the concentrations in the first 60 min. Aiming to have a methodology capable of predicting the degradation efficiency for the studied processes, it was verified that the artificial neural networks MLP 4-9-3 and MLP 5-6-3 well represent the data from the homogeneous and heterogeneous processes, respectively. A toxicity study was carried out using seeds, bacteria and microcrustaceans and it was found that the intermediate compounds formed during the treatment process act differently for each of them.

Simultaneous Degradation of Diuron and Hexazinone Herbicides by Photo-Fenton: Assessment of Concentrations of H2O2 and Fe2+ by the Response Surface Methodology

2015 ◽  
Vol 18 (1) ◽  
Author(s):  
Alysson S. Martins ◽  
Vanessa M. Vasconcelos ◽  
Tanare C. R. Ferreira ◽  
Edenir R. Pereira-Filho ◽  
Marcos R. V. Lanza
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Advanced Oxidation Processes ◽  
Aqueous Media ◽  
Advanced Oxidation ◽  
Aquatic Environments ◽  
Soil Leaching ◽  
Oxidation Processes ◽  
Simultaneous Degradation

AbstractPesticides are often reported in aquatic environments contamination as being a result of soil leaching and improper disposal of agricultural packages. Advanced oxidation processes have been studied as alternatives to treat such compounds in aqueous media. The aim of this study was to determine the best concentrations of H

scholarly journals Synthesis, structure, and visible-light-driven activity of o-YbFeO3/h-YbFeO3/CeO2 photocatalysts

2021 ◽  
Vol 8 (4) ◽  
pp. 20218407
Author(s):  
Sofia M. Tikhanova ◽  
Lev A. Lebedev ◽  
Svetlana A. Kirillova ◽  
Maria V. Tomkovich ◽  
Vadim I. Popkov
Keyword(s):  
Visible Light ◽  
Cerium Dioxide ◽  
Advanced Oxidation Processes ◽  
Aqueous Media ◽  
Visible Region ◽  
Methyl Violet ◽  
Advanced Oxidation ◽  
Solution Combustion ◽  
Oxidation Processes ◽  
Method Of Solution

Photo-Fenton-like oxidation of organic substances is one of the key advanced oxidation processes based on the reversible Fe2+↔Fe3+ transition and the generation of a strong oxidant ·OH in the presence of H2O2 and is currently considered as a promising method for the purification of polluted aqueous media. However, the absence of effective and stable photocatalysts of this process, operating under the action of visible light, necessitates the exploratory studies, mainly among iron oxides and ferrites of various compositions and structures. In this work, using the method of solution combustion followed by heat treatment in air the heterojunction nanocomposites based on ytterbium orthoferrite and cerium dioxide of the composition o-YbFeO3/h-YbFeO3/CeO2 (0–20 mol.%) with high absorption in the visible region and advanced photo-Fenton-like activity were obtained. The nanocomposites were studied by EDS, SEM, XRD, BET, and DRS methods. The photo-Fenton-like activity of the nanocomposites was investigated during the degradation of methyl violet under the action of visible (λmax = 410 nm) radiation. As a result, the formation of I-type heterojunction based on stable rhombic (55.4–79.0 nm) and metastable hexagonal (19.5–24.0 nm) modifications of ytterbium orthoferrite (o-YbFeO3 and h-YbFeO3, respectively) and cubic cerium dioxide CeO2 (13.2–19.2 nm) nanocrystals was established. It was shown that the obtained nanocomposites had foamy morphology and were characterized by a specific surface in the range of 9.1–25.0 m2/g, depending on the CeO2 content. It was found that nanocrystalline components were chemically and phase-pure, uniformly spatially distributed over the nanocomposite, and had multiple contacts with each other. Based on this fact and the established electronic structure of the nanocomposite components, the formation of I-type heterojunction with the participation of o-YbFeO3 (Eg = 2.15 eV), h-YbFeO3 (Eg = 2.08 eV), and CeO2 (Eg = 2.38 eV) was shown, the presence of which increased photocatalytic activity of the resulting nanocomposite. The optimal content of CeO2 in the nanocomposite was 5%, and the o-YbFeO3/h-YbFeO3/CeO2–5% sample was characterized by the highest rate constant of photo-Fenton-like degradation of methyl violet under the action of visible light equal to k = 0.138 min–1, which was 2.5 to 5 times higher than for nanocomposites based on ytterbium orthoferrite. The obtained results obtained indicate that the developed nanocomposites can be considered as a promising basis for the advanced oxidation processes for the purification of aqueous media from organic pollutants.

Degradation of Sulfa Pharmaceuticals in Aquatic Environment by O3 and UV/TiO2 Processes

2011 ◽  
Vol 255-260 ◽  
pp. 4222-4226
Author(s):  
Li Chin Chuang ◽  
Chin Hsiang Luo ◽  
Sing Wei Huang ◽  
Chun Ju Lin
Keyword(s):  
Rate Constants ◽  
Aquatic Environment ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Complete Removal ◽  
Oxidation Processes ◽  
First Order ◽  
First Order Kinetics ◽  
Pseudo First Order ◽  
Removal Efficiencies

The removal efficiencies of sulfamerazine (SMR) and sulfamethoxypyridazine (SMP) in aqueous solutions were studied using advanced oxidation technologies. The results show similar removal kinetics for two sulfa pharmaceuticals and that complete removal of all is achieved within 90 min of ozonation at the concentration of O3 (1 mgL-1) without controlling the pH. The rate constants were calculated as 0.0143 and 0.0113 min-1 for SMR and SMP, respectively. The catalysts exhibited a superior removal efficiency of SMP to those of SMR with a TiO2 concentration of 2.0 gL-1. The disappearance of these two sulfa pharmaceuticals follows a pseudo-first-order kinetics according to the Langmuir-Hinshelwood (L-H) model. The rate constants were calculated as 5 × 10-3 and 6 × 10-4 min-1 for SMR and SMP, respectively. Advanced oxidation processes (AOPs), such as O3 and UV/TiO2 processes should be an effective treatment for removing these sulfa pharmaceuticals.

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

Water ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2094
Author(s):  
Laura Antiñolo Bermúdez ◽  
Jaime Martín Pascual ◽  
María del Mar Muñio Martínez ◽  
Jose Manuel Poyatos Capilla
Keyword(s):  
Wastewater Treatment ◽  
Advanced Oxidation Processes ◽  
Wastewater Treatment Plants ◽  
State Of The Art ◽  
Advanced Oxidation ◽  
Natural Environments ◽  
Tertiary Treatment ◽  
Oxidation Processes ◽  
Different Types ◽  
Degradation Of Pollutants

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.

A Study on the Degradation of Endocrine Disruptors and Dioxins by Ozonation and Advanced Oxidation Processes

2002 ◽  
Vol 35 (9) ◽  
pp. 840-847 ◽  
Author(s):  
Sota Nakagawa ◽  
Yukio Kenmochi ◽  
Kaori Tutumi ◽  
Toshihiro Tanaka ◽  
Izumi Hirasawa
Keyword(s):  
Endocrine Disruptors ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Processes
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