Removal of Selected Benzothiazols with Ozone

Derco, Ján; Melicher, Michal; Kassai, Angelika

doi:10.5772/30101

Cited by 3 publications

(3 citation statements)

References 26 publications

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“…There can be seen two regions in Figure 2 . During the first region with duration of approximately 15 minutes, the conversion of 2-MBT to BT and other BT-derivatives occurs according to mechanisms proposed by Fiehn et al [ 6 ] and results published by Derco et al [ 17 , 27 ]. Kinetic data measured for this region were fitted very well by zero-order kinetics.…”

Section: Resultsmentioning

confidence: 96%

Removal of the 2-Mercaptobenotiazole from Model Wastewater by Ozonation

Derco

Kassai

Melicher

et al. 2014

The Scientific World Journal

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The feasibility of ozonation process for 2-mercaptobenzothiazole (2-MBT) removal follows from results of ozonation of the model wastewater. Total removal of 2-MBT was observed after 20 minutes of ozonation. Very good reproducibility of repeated ozonation trials including sampling and analysis was observed. However, the majority of dissolved organic carbon (DOC) and chemical oxygen demand (COD) remained in the reaction mixture. Benzothiazole (BT) and 2-hydroxybenzothiazole (OBT) intermediates were identified during degradation of 2-MBT with ozone. In addition to the above benzothiazole derivatives, the creation of some other organic compounds follows from results of mass balance. The best fits of experimental data were obtained using the first kinetic model for 2-MBT and zero-order kinetic model for COD and DOC. The reaction time of 60 minutes can be considered as effective with regard to controlled oxidation in order to increase a portion of partially oxidized substances. Higher biodegradability and lower toxicity of ozonation products on respiration activity of activated sludge microorganisms was observed at higher ozonation time.

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Section: Resultsmentioning

confidence: 96%

Removal of the 2-Mercaptobenotiazole from Model Wastewater by Ozonation

Derco

Kassai

Melicher

et al. 2014

The Scientific World Journal

Self Cite

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“…Derco et al [28] presented the results of research into the use of ozone for an integrated 2-mercaptobenzothiazole (2-MBT) degradation process after its adsorption to activated sludge and simultaneous disintegration of surplus sludge cells in order to reduce its production. During the laboratory research of the integrated process, 99% removal of 2-MBT from the activation mixture was observed after 20 min of ozonation.…”

Section: Integrated Processmentioning

confidence: 99%

“…However, the toxicity of wastewater can be decreased significantly. In addition to this benefit, the integrated approach to the multi-purpose use of the ozonation process increases the environmental and economic efficiency of the process [28].…”

Section: Integrated Processmentioning

confidence: 99%

Introductory Chapter: Ozone in the Nature and Practice

Derco¹,

Urminská²,

Vrabeľ³

2018

Ozone in Nature and Practice

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Ozone (O 3) is a tri-atomic form of oxygen, that is, three atoms of oxygen bonded together. It is an unstable gas with distinctive sharp odor. Under normal conditions, ozone is unstable and rapidly decomposes to a more stable gaseous form of molecular oxygen, O 2. Behavior of ozone shows more "faces" according to the circumstances. The ozone layer protects the Earth from damaging ultraviolet (UV) light; therefore, it is an inevitable compound to save life on Earth. Its applications also present benefits for human welfare. Thanks to its strong oxidizing properties as well as bactericidal, virucidal, and fungicidal effects, it is widely used for water disinfection, wastewater treatment, in various industrial fields, for example, in the pulp and paper industry and the textile industry and progressively for medical purposes as well. Unfortunately, there are also circumstances, mainly due to the activities of humans, when ozone behaves contrary to the mentioned benefits, with negative and harmful influence on human health, and life in nature, as well as to material environment [1]. While stratospheric ozone protects biological life on Earth, ozone in the troposphere is toxic to human health, plants, and trees and it also damages various materials [2]. One may have noticed a smell in the air after thunders and lightning bolts. The pure odor was most likely to the actual ozone formed by flashing atmospheres. Because ozone is unstable and cannot be stored successfully, it must be generated at the application site. To produce ozone sufficiently in the water, wastewater, and sewage treatment plant, ozone generators are used. The simplest method can be ozone generated by the passage of oxygen or oxygencontaining air through the area of electric discharge or spark. Ozone is a subject of interest and research for a number of reasons. This chapter will deal briefly with related aspects of stratospheric and tropospheric ozone as well as with utilization of ozone in practice.

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Removal of Micropollutants by Ozone-Based Processes

et al. 2021

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Micropollutants and emerging substances pose a serious problem to environmental sustainability and remediation, due to their widespread use and applications in everyday life. This group of chemicals is diverse but with common toxic and harmful properties. Their concentration in the environment is often very low; however, due to their recalcitrant nature, they are persistent in air, water, and soil. From an engineering point of view, the challenge is not straightforward. It is difficult to remove these contaminants from complex mixtures of substances by conventional methods used in wastewater and drinking water treatment. Ozonation and ozone-based AOPs are accepted processes of degradation of resistant substances or at least enhancement of their biodegradability. The aim of this review paper is to present research trends aimed at solving problems in the research and application of ozone-based processes in the removal of micropollutants from wastewater, thus preventing leakage of harmful substances into surface water, soil, and groundwater and facilitating the reuse of wastewater. Priority substances, micropollutants and emerging pollutants, as well as processes and technologies for their transformation and elimination, are briefly specified. Results obtained by the authors in solving research projects that were aimed at eliminating selected micropollutants by ozonation and ozone-based AOPs are also presented. This review focuses on selected alkylphenols, petroleum substances, and organochlorine pesticides.

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Removal of Selected Benzothiazols with Ozone

Cited by 3 publications

References 26 publications

Removal of the 2-Mercaptobenotiazole from Model Wastewater by Ozonation

Removal of the 2-Mercaptobenotiazole from Model Wastewater by Ozonation

Introductory Chapter: Ozone in the Nature and Practice

Removal of Micropollutants by Ozone-Based Processes

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