Comparison between industrial and simulated textile wastewater treatment by AOPs – Biodegradability, toxicity and cost assessment

Bilińska, Lucyna; Gmurek, Marta; Ledakowicz, S.

doi:10.1016/j.cej.2016.07.100

Cited by 261 publications

(67 citation statements)

References 30 publications

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“…Due to the presence of xenobiotic compounds in textile waste of this process, it contributes a lot in creating environmental pollution [2]. Textile effluents usually contain alkalis, organic acids, organic dyes, finishing agents and non-biodegradable inorganic salts [3,4]. These textile waste materials are harmful for aquatic life as well as it is responsible for many diseases in humans [5].…”

Section: Introductionmentioning

confidence: 99%

Eco-friendly route for dyeing of cotton fabric using three organic mordants in reactive dyes

et al. 2019

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The textile dyes and fixing agents that used in dyeing process are major contributor to environmental pollution. In the present study, three different organic mordants (Sodium Citrate, Ammonium Acetate, and Potassium Acetate) are used in exhaust dyeing as mordants. Effect of mordant concentrations is studied on fastness properties (color change, rubbing fastness & light fastness) of cotton dyed with reactive dyes using these organic mordants. Comparison of these mordants with conventional fixing agent (NaCl) is also studied in order to evaluate the difference between fastness properties of conventional and organic salts used in this study. We found that the color fastness properties of conventional and organic salts are comparable, better in case of sodium citrate. Similarly color depth on fabric after dyeing with organic as well as inorganic salts is measured using data color. Results confirm that higher values of K/S are obtained for organic salts by using lower organic salt concentration compared to conventional salt. Reduction in total dissolved solids (TDS) of dye effluents is obtained from 6% to 29% for three organic salts as compared to conventional salt.

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Section: Introductionmentioning

confidence: 99%

Eco-friendly route for dyeing of cotton fabric using three organic mordants in reactive dyes

et al. 2019

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“…In this scenario, [7] demonstrated that some of those oxidative processes can be suitable for industrial application. The research group reported that, based on the experimental result and cost evaluation, the use of ozone or ozone with a very low concentration of hydrogen peroxide (0.005 M) can be recommended to the textile industry.…”

Section: Introductionmentioning

confidence: 99%

Sulfate Radical Technologies as Tertiary Treatment for the Removal of Emerging Contaminants from Wastewater

2017

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Abstract:Water scarcity and water pollution is a worldwide problem and has driven research into eco-friendly and low-energy cost efficient remediation. The reuse of wastewater for non-potable purpose after proper treatment is the only sustainable solution to the problem. Advanced oxidation processes (AOP) based on the in-situ generation of hydroxyl radicals have been intensively investigated for this purpose as a treatment step to achieve wastewater reuse. The main degradation mechanism of AOPs is based on the reaction of hydroxyl radicals with dissolved organic matter. However, hydroxyl radicals follow unselective multi-step pathways, limiting their efficiency in complex environmental matrices. To overcome such limitations, AOP treatment, based on generation of sulfate radicals, has been developed and widely investigated. This current mini-review will cover the most recent developments regarding emerging contaminant removal, i.e., organic micropollutants, using sulfate radicals generated by active persulfate or peroxymonosulfate, with a focus on an application to wastewater effluents for possible wastewater reuse.

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“…Nowadays, photochemical oxidation is developing to deal with the problem of micropollutants. This group of photochemical oxidation processes mostly includes advanced oxidation processes (AOPs) [17][18][19]. These processes show great effectiveness even in the case of textile wastewater [19,20].…”

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confidence: 99%

“…This group of photochemical oxidation processes mostly includes advanced oxidation processes (AOPs) [17][18][19]. These processes show great effectiveness even in the case of textile wastewater [19,20]. Unfortunately, their implementation is expensive due to necessary requirements, including energy-intensive equipment, non-ecological oxidants, and other disadvantages (e.g., iron precipitation).Considering the importance of water-treatment methods, which should removal a large amount of pollutants in a cost-efficient manner, the present study focused on a process involving visible light and a reusable insoluble photoactive chitosan carrier.…”

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confidence: 99%

Heterogeneous Oxidation of Phenolic Compounds with Photosensitizing Catalysts Incorporated into Chitosan

et al. 2019

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The increasing amount of hazardous micropollutants in the aqueous environment has recently become a concern, especially because they are not usually included in environmental monitoring programs. There is also limited knowledge regarding their behavior in the environment and their toxicity. This paper presents results regarding the heterogeneous photosensitized oxidation of 10 phenolic compounds under visible light. All of the selected compounds are classified as pollutants of emerging concern. For the first time, the application of photosensitizing catalysts incorporated into a chitosan carrier was investigated from several points of view, namely, structure characterization, singlet oxygen generation potential, photodegradation ability, biodegradability, and toxicity assessment. It was found that compounds of different origins were degraded with high effectivity. Photoactive chitosan was stable and could be reused for at least 12 cycles without losing its photocatalytic activity. The Hammett constants for all of the degraded compounds were determined. Improved biodegradability after the treatment was achieved for almost all compounds, apart from 4-hydroxybenzoic acid, and only slightly for 2-phenylphenol. The acute toxicity was assessed using bioluminescent Vibrio fischeri bacteria, indicating lower toxicity than the parent compounds.Photosensitized oxidation is undoubtedly one of the most important photochemical methods, since it does not generate any additional pollutants [5]. Moreover, the advantage of photosensitized oxidation is the photooxidation of hard-degradable compounds by singlet oxygen generated in the presence of air and solar radiation [5][6][7], therefore, photosensitized oxidation is classified as a green chemistry process. Moreover, because the heterogeneous process is considered to leave no residue, no sludge is produced from the process. Furthermore, if the immobilized photosensitizer remains unchanged throughout the process, the photocatalyst can easily be reused.Two general mechanisms of photosensitized oxidation for such reactions are well-known as Type I, also called the radical-involving mechanism, and Type II, the singlet oxygen mechanism [8,9]. Our previous research showed that singlet oxygen could be used for water purification. For this kind of area, the immobilization of photosensitizers onto various materials (heterogeneous system) is a desirable approach due to the easy separation from the reaction mixture and the preparation for reuse. Moreover, in homogenous systems (where the photosensitizer is dissolved in a water solution), the photosensitizer undergoes photobleaching, resulting in a rapid decrease in yield. Immobilized photosensitizers exhibit the advantages of good activity, stability against photobleaching, and repeated use [10]. Immobilization of a photosensitizer is associated with a decrease in the quantum yield of singlet oxygen [8,9]. This may be due to limitations in oxygen diffusion into and from the carrier material [9]. These disadvantages can be overcome by reusi...

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Comparison between industrial and simulated textile wastewater treatment by AOPs – Biodegradability, toxicity and cost assessment

Cited by 261 publications

References 30 publications

Eco-friendly route for dyeing of cotton fabric using three organic mordants in reactive dyes

Eco-friendly route for dyeing of cotton fabric using three organic mordants in reactive dyes

Sulfate Radical Technologies as Tertiary Treatment for the Removal of Emerging Contaminants from Wastewater

Heterogeneous Oxidation of Phenolic Compounds with Photosensitizing Catalysts Incorporated into Chitosan

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