Ozonation of an effluent of oil refineries for COD and sulfide removal

Talei, Mohammadreza; Mowla, Dariush; Esmaeilzadeh, Feridun

doi:10.1080/19443994.2014.951968

Cited by 8 publications

(7 citation statements)

References 41 publications

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“…In contrast, the effects of the temperature were found to be the result of a multifactorial balance. Specifically, as temperature increased, ozone solubility decreased, limiting the conversion of H 2 S. At the same time, the H 2 S volatilization rate and the reaction constant increased, facilitating the removal of H 2 S …”

Section: Removal Of Odor Compounds From Drinking Water By Direct Ozon...mentioning

confidence: 99%

“…Investigation of the effects of factors (e.g., pH and temperature) on the ozonation of H 2 S revealed that removal efficiency increased as the pH increased from 3.5 to 9.4. 59 In contrast, the effects of the temperature were found to be the result of a multifactorial balance. Specifically, as temperature increased, ozone solubility decreased, limiting the conversion of H 2 S. At the same time, the H 2 S volatilization rate and the reaction constant increased, facilitating the removal of H 2 S. 59 Dibutyl sulfide (DBS) is mostly found in industrial wastewater.…”

Section: Reaction Mechanisms During the Sole Ozonation Process With O...mentioning

confidence: 99%

“…59 In contrast, the effects of the temperature were found to be the result of a multifactorial balance. Specifically, as temperature increased, ozone solubility decreased, limiting the conversion of H 2 S. At the same time, the H 2 S volatilization rate and the reaction constant increased, facilitating the removal of H 2 S. 59 Dibutyl sulfide (DBS) is mostly found in industrial wastewater. 60 The degradation efficiency of low concentration DBS is susceptible to temperature, while that of high concentration DBS is limited by ozone solubility during ozonation.…”

Section: Reaction Mechanisms During the Sole Ozonation Process With O...mentioning

confidence: 99%

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Degradation of Odor Compounds in Drinking Water by Ozone and Ozone-Based Advanced Oxidation Processes: A Review

Wang,

Xing,

et al. 2023

ACS EST Water

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Odor compounds pose a significant challenge in drinking water sources, resisting conventional treatment methods. To tackle this issue, ozone and ozone-based advanced oxidation processes (AOPs) have gained widespread use due to their high oxidation capacity. This study aims to comprehensively assess the oxidation effects, reaction mechanisms, and potential risks associated with direct ozonation processes and ozone-based AOPs, targeting the removal of diverse odor compounds found in drinking water sources. Our review sheds light on the reaction mechanisms between typical odor compounds and ozone, while an in-depth discussion compares the advantages and disadvantages of various AOPs. Operating parameters, including the pH, reaction temperature, physicochemical water quality, and ozone dose, are analyzed to understand their effect on odor compound removal by ozone. Furthermore, we briefly introduce practical combined drinking water treatments that incorporate ozone and other processes. Finally, we present the essential requirements, factors, and challenges for future research endeavors in developing advanced ozonation technologies for efficient odor compound removal. Overall, this comprehensive study lays the foundation for further advancements in drinking water treatment strategies to ensure the delivery of safe and odor-free water to the public.

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Section: Removal Of Odor Compounds From Drinking Water By Direct Ozon...mentioning

confidence: 99%

Section: Reaction Mechanisms During the Sole Ozonation Process With O...mentioning

confidence: 99%

Section: Reaction Mechanisms During the Sole Ozonation Process With O...mentioning

confidence: 99%

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Degradation of Odor Compounds in Drinking Water by Ozone and Ozone-Based Advanced Oxidation Processes: A Review

Wang,

Xing,

et al. 2023

ACS EST Water

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“…Hydroxyl radical (•OH) is produced to provide a high oxidation potential, which destroys organic molecules in wastewater [61]. To initialize this reaction, ultrasound, ozonation, photocatalysis and peroxide oxidation are used [62][63][64][65]. One of the most popular AOP methods is Fenton's reaction, based on using Fe 2+ in an acidic aqueous environment to produce hydroxyl radical [66][67][68].…”

Section: Post-treatmentmentioning

confidence: 99%

Pitfalls of Wastewater Treatment in Oil Refinery Enterprises in Kazakhstan—A System Approach

et al. 2019

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The present article is an assessment of wastewater treatment processes in the oil refinery sector in Kazakhstan by comparing relevant experience of developed and developing countries. The legislation in this sphere, the treatment methods, the discharge process and the effect on the environment were evaluated following international and national regulations. In our study, the wastewater systems in three factories in Kazakhstan were assessed. Results show that, even though the environmental regulation in Kazakhstan promotes the polluter pays principle and follows the World Health Organization (WHO) recommendations, the oil refinery plants in Kazakhstan still contain exceeding concentrations of pollutants in their effluents. One issue is that the local legislation allows disposal of wastewater to natural or artificial ponds as long as the concentrations of pollutants in effluents are less than the already existing concentrations in the pond. Consequently, the factories can use ponds with an initially high concentration of contaminants. The high initial concentration of pollutants in the pond water is due to wastewater discharged before the implementation of current environmental regulations. This issue in the current legislation leads to the situation where there is no incentive for efficient wastewater treatment. The national law also lacks regulations regarding which methodology should be used to assess the pollutants in the wastewater. Thus, the control by national environmental office for each enterprise is negotiated separately between the factory and the governmental body. This gives the factory a strong position to define the parameters assessing the effluents. This has led to none of the factories measuring, e.g., heavy metals in discharged wastewater. Total petroleum hydrocarbons (TPH) concentration in wastewater is often exceeded at each factory and there is no analysis done for different hydrocarbon fraction. To overcome the issues described in the present study, we strongly recommended a unified and transparent methodology for the country’s oil refinery industry to assess important pollutants in discharged wastewater.

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“…There are many methods for the removal of sulfide in wastewater, including adsorption (Stepova et al, 2009), oxidation (Talei et al, 2015), chemical and biological technologies (Wang et al, 2016) and electrochemical methods (Dutta et al, 2010). For the adsorption methods, the selection of absorbents is crucial to the removal efficiency.…”

Section: Introductionmentioning

confidence: 99%

Use of bauxite residue (red mud) as a low cost sorbent for sulfide removal in polluted water remediation

Sheng

Sun

Sun³

et al. 2016

Water Science and Technology

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Abstract:Sulfide is an important pollutant in aqueous systems. Sulfide removal from polluted waters is required prior to discharge. Red mud (RM) is a solid waste of bauxite processing that is rich in reactive iron oxides and consequently has the potential to be used to remove sulfide from aqueous systems. A series of experiments were undertaken using raw and sintered RM to remove sulfide from waters. RM was highly efficient at sulfide removal (average 75% sulfide removal at initial concentration of ~5 mg L -1 , with 500 mg L -1 RM addition) due to both physical adsorption (high specific area) and chemical reaction (with amorphous Fe). Sintered RM, which has a lower surface area and lower mineral reactivity, was much less efficient at removing sulfide (~20% removal under equivalent experimental conditions). Furthermore, concomitant metal release from raw RM was lower than for sintered RM during the sulfide removal process. The results showed that raw RM is a potentially suitable material for sulfide removal from polluted waters and consequently could be used as a low cost alternative treatment in certain engineering applications.

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Ozonation of an effluent of oil refineries for COD and sulfide removal

Cited by 8 publications

References 41 publications

Degradation of Odor Compounds in Drinking Water by Ozone and Ozone-Based Advanced Oxidation Processes: A Review

Degradation of Odor Compounds in Drinking Water by Ozone and Ozone-Based Advanced Oxidation Processes: A Review

Pitfalls of Wastewater Treatment in Oil Refinery Enterprises in Kazakhstan—A System Approach

Use of bauxite residue (red mud) as a low cost sorbent for sulfide removal in polluted water remediation

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