Evaporation and air-stripping to assess and reduce ethanolamines toxicity in oily wastewater

Libralato, Giovanni; Ghirardini, Annamaria Volpi; Avezzu, Francesco

doi:10.1016/j.jhazmat.2007.09.042

Cited by 27 publications

(12 citation statements)

References 13 publications

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“…Large amounts of such liquid wastes are generated by different activities such as crude oil production, refinery, petrochemical and lubricant production units, automobile industries, aircraft plants, metal finishing, metal working, textile industry and paper mills (Benito et al, 2002;Libralato et al, 2008;Zhou et al, 2008;Tobiszewski et al, 2012;Dermentzis et al, 2014). Food industries is also responsible for wastewater containing oils (Fouad, 2014).…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Electrocoagulation Treatment Technique for the Separation of Oil from Wastewater

Fadali¹,

Ebrahiem²,

Gamil³

et al. 2015

J. of Environmental Science and Technology

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Oily wastewater represents a dangerous threat when discharged to receiving bodies. This research investigates electrocoagulation as a simple, effective and economic technique for treatment of such wastewater. Bench scale reactors were used to evaluate the factors that may affect the treatment of a wastewater obtained from Kuwait Gulf Oil Company. Aluminum was used as a sacrificial anode. Electrodes were arranged at different configurations (horizontal, vertical and vertical anode with horizontal cathode) to select the optimal one. Other tested operation parameters include time of treatment, current density, the distance between the electrodes, anode tubes diameters and the electrolyte concentration of the emulsion. The treatment efficiency was evaluated by comparing the initial and final turbidity of the treated wastewater. Experimental results indicate that the efficiency of oil separation increased with the increase of the treatment time, current density, anode diameter and concentration of electrolyte. However, it decreased with the increase of distance between electrodes. The horizontal arrangement gave the best results. The data shows that oil separation increases slightly with increasing temperature. The optimum time and current density for oil separation was determined as 30 min and 30 mA cmG 2 , respectively. These parameters reduced the turbidity of the wastewater from 95-5 NTU.

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Section: Introductionmentioning

confidence: 99%

Investigation of the Electrocoagulation Treatment Technique for the Separation of Oil from Wastewater

Fadali¹,

Ebrahiem²,

Gamil³

et al. 2015

J. of Environmental Science and Technology

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“…Traditional wastewater treatment techniques including activated carbon adsorption, incineration, biological treatments, or air stripping [1][2][3][4], usually have difficulty in treating the toxic organic contaminants thoroughly. The advanced oxidation processes (AOPs) are the most promising and effective processes for the treatment of drinking water sources and for the remediation of organic contaminated groundwater [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Theoretical limiting concentration for mineralization of trichloromethane and dichloromethane in aqueous solutions by AOPs

Huang

Lü

et al. 2011

Sci. China Chem.

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It is widely stated that most organic contaminants could be completely mineralized by Advanced Oxidation Processes (AOPs). This statement means that the concentration of the organic contaminant at equilibrium (limiting concentration, LC) is low enough to be neglected. However, for environmental safety, especially drinking water safety, this statement needs to be verified from chemical engineering thermodynamic analysis. In this paper, trichloromethane (CHCl 3 ) and dichloromethane (CH 2 Cl 2 ) are selected as the model systems, and the equilibrium concentration (theoretical limiting concentration, TLC) for the mineralization of chlorinated methanes in aqueous solutions at the different initial concentrations of chlorinated methanes, pH values and ·OH concentrations by AOPs are investigated by thermodynamic analysis. The results in this paper show that the TLC for the mineralization of CHCl 3 and CH 2 Cl 2 with ·OH increases with increasing initial concentrations of CHCl 3 and CH 2 Cl 2 , decreases with increasing concentration of ·OH, and the TLC for the mineralization of CHCl 3 decreases with increasing pH values except that the pH value changes from 3.0 to 3.5. For the mineralization of CH 2 Cl 2 with ·OH, at the concentrations of ·OH obtained from the literature, there is no obvious change of the TLC with pH values, while as the concentrations of ·OH increase by 10 and 100 times, the TLC decreases with the increasing pH values from 2.0 to 3.0 and from 3.5 to 4.5, and increases with the increasing pH values from 3.0 to 3.5 and from 4.5 to 5.0. The investigations in this paper imply that high concentration of ·OH, a bit higher pH values (4.0-5.0) in acid environment and low initial concentrations of the organic contaminants are beneficial for the complete mineralization of chlorinated methanes by AOPs. thermodynamic analysis, chemical equilibrium, theoretical limiting concentration, organic contaminant mineralization degree, advanced oxidation processes, chlorinated methane

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“…cosmetics and personal care products) [1,2]. They are frequently applied in amine based processes for the removal of acid impurities from process gas streams and of CO 2 in industry [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…Only limited and divergent information is actually available, mainly for some decomposer, producer and first consumer organisms [1,2,5,6]. The species have been short-listed as follows, indicating in brackets the compounds for which some data are available: Vibrio fischeri (MEA, DEA and TEA) [1,2], Skeletonema costatum (MEA and DEA) [4,5], Chlorella vulgaris (DEA) [1], Artemia salina (DEA and TEA) [5,7], Crangon crangon (MEA and TEA) [7] and Asterias forbesi (DEA) [5]. In particular, A. salina datum for DEA has been signalled as outlier by Pan Pesticide database [7] and the same may be suspected for TEA value.…”

Section: Introductionmentioning

confidence: 99%

“…Marine species could be considered as a potential target of MEA, DEA and TEA that is present, not only in municipal wastewater, but also in oily wastewater, which is a major environmental problem especially in the coastal zone where chemical industries produce significant amounts of industrial wastewater [2,10]. Anyway, to the best of our knowledge there are no available data about environmental concentrations of MEA, DEA and TEA in discharges, surface water, soil or sediment.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Seawater ecotoxicity of monoethanolamine, diethanolamine and triethanolamine

Libralato

Ghirardini

Avezzu

2010

Journal of Hazardous Materials

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Evaporation and air-stripping to assess and reduce ethanolamines toxicity in oily wastewater

Cited by 27 publications

References 13 publications

Investigation of the Electrocoagulation Treatment Technique for the Separation of Oil from Wastewater

Investigation of the Electrocoagulation Treatment Technique for the Separation of Oil from Wastewater

Theoretical limiting concentration for mineralization of trichloromethane and dichloromethane in aqueous solutions by AOPs

Seawater ecotoxicity of monoethanolamine, diethanolamine and triethanolamine

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