Biodegradation of BTEX compounds in a biofilm reactor—Modeling and simulation

Mello, Josiane Maria Muneron de; Brandão, Heloisa de Lima; Souza, Sabrina da Silva de; Silva, Adriano da

doi:10.1016/j.petrol.2009.11.004

Cited by 33 publications

(18 citation statements)

References 30 publications

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“…Benzene and toluene are mostly found in effluents of chemical industries and refineries and have a high potential for pollution of surface water and groundwater. In addition, due to health effects, they are considered high-risk compounds for the environment [7]. Therefore, it is necessary to remove these compounds from water resources, particularly from surface water and groundwater.…”

Section: Introductionmentioning

confidence: 99%

Adsorptive Removal of Benzene and Toluene from Aqueous Environments by Cupric Oxide Nanoparticles: Kinetics and Isotherm Studies

Mohammadi

Bazrafshan

Noroozifar

et al. 2017

Journal of Chemistry

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Removal of benzene and toluene, as the major pollutants of water resources, has attracted researchers' attention, given the risk they pose to human health. In the present study, the potential of copper oxide nanoparticles (CuO-NPs) in eliminating benzene and toluene from a mixed aqueous solution was evaluated. For this, we performed batch experiments to investigate the effect of solution pH (3-13), dose of CuO-NPs (0.1-0.8 g), contact time (5-120 min), and concentration of benzene and toluene (10-200 mg/l) on sorption efficiency. The maximum removal was observed at neutral pH. By using the Langmuir model, we measured the highest adsorption capacity to be 100.24 mg/g for benzene and 111.31 mg/g for toluene. Under optimal conditions, adsorption efficiency was 98.7% and 92.5% for benzene and toluene, respectively. The sorption data by CuO-NPs well fitted into the following models: Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich model. The experimental information well fitted in the Freundlich for benzene and Langmuir for toluene. Based on the results, adsorption followed pseudo-second-order kinetics with acceptable coefficients. The findings introduced CuO-NPs as efficient compounds in pollutantsadsorption. In fact, they could be used to develop a simple and efficient pollutant removal method from aqueous solutions.

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Section: Introductionmentioning

confidence: 99%

Adsorptive Removal of Benzene and Toluene from Aqueous Environments by Cupric Oxide Nanoparticles: Kinetics and Isotherm Studies

Mohammadi

Bazrafshan

Noroozifar

et al. 2017

Journal of Chemistry

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“…These wastewater contain hydrocarbons, phenols and dissolved minerals 3 . The hydrocarbons which are generally benzene, toluene, ethyl benzene and xylenes (BTEX) are either toxic or carcinogenic 4 . Phenols and dissolved minerals are also toxic to both human and aquatic life 5 .…”

Section: Introductionmentioning

confidence: 99%

Characterization of Petroleum Sludge from Refinery Industry Biological Wastewater Treatment Unit

Ali¹,

Abu-Hassan²,

Ibrahim³

et al. 2017

Preprint

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Thermal plasma technique is becoming prominent in the treatment of variety of waste ranging from municipal solid waste, incinerator residue, hospital waste, electronics waste and industrial sludge. Application of the new treatment technology to petroleum sludge requires information on the nature and characteristics of the sludge that will be use to optimize the treatment system. In this investigation, petroleum sludge obtained from Petronas Melaka was characterized for its physical and chemical features. Proximate and ultimate analysis as well as determination of elemental composition were carried out. The sludge was found to contain high moisture (78.91%), low ash (5.06%), low volatiles (5.52%) and high fixed carbon (10.51%). The sludge has a TOC of 54.48% and HHV of 23.599MJ/kg. Despite the high moisture content, the higher heating value (HHV) is high when compared to literature values. The high value of HHV may be associated with the high fixed carbon, low ash content and high value of TOC. The apparent density of the sludge is slightly lower. Fourteen heavy metals are detected in significant quantities. Proper waste management that will safely dispose the sludge is required. The waste disposal technique should take into cognizant the possibility of leaching of heavy metals into ground water on one hand and the gasification of lighter ones as exhaust gas on the other.

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“…This means that the release of organics from GAC to biofilm would strengthen the biodegradation capability of BGAC. In fact, evidence shows that a wide variety of recalcitrant organics could be effectively removed from wastewater by BGAC 5, 9–12…”

Section: Introductionmentioning

confidence: 99%

Mathematical modeling of biofilm‐covered granular activated carbon: a review

Shen

Liu

2012

J of Chemical Tech & Biotech

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This paper reviewed the mass‐transfer of the target substance in the biofilm‐covered granular activated carbon (BGAC) system. Representative hypotheses and equations related to developing the mathematical models for a BGAC reactor were discussed in terms of granular activated carbon (GAC) phase, biofilm phase and bulk solution, respectively. It should be noted that discrete phenomena such as biofilm detachment due to erosion or sloughing were not considered for the modeling system. Recent advances on this topic were thoroughly updated, as well as those models proposed in past decades. It appears that a general BGAC model has not been available so far, and further efforts are required to obtain models more approaching of the physical mechanism of this complicate system. Copyright © 2012 Society of Chemical Industry

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Biodegradation of BTEX compounds in a biofilm reactor—Modeling and simulation

Cited by 33 publications

References 30 publications

Adsorptive Removal of Benzene and Toluene from Aqueous Environments by Cupric Oxide Nanoparticles: Kinetics and Isotherm Studies

Adsorptive Removal of Benzene and Toluene from Aqueous Environments by Cupric Oxide Nanoparticles: Kinetics and Isotherm Studies

Characterization of Petroleum Sludge from Refinery Industry Biological Wastewater Treatment Unit

Mathematical modeling of biofilm‐covered granular activated carbon: a review

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