Temperature and air–water ratio influence on the air stripping of benzene, toluene and xylene

Abdullahi, Muhammad; Hassan, Mohd Ariffin Abu; Noor, Zainura Zainon; Ibrahim, Roslina

doi:10.1080/19443994.2014.903209

Cited by 13 publications

(10 citation statements)

References 25 publications

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“…Many of these VOCs are hazardous to human health and the environment as they are flammable, toxic, carcinogenic, and/or mutagenic agents (Bansode et al, 2003;Peng et al, 2003;Lillo-Rodenas et al, 2006;Wibowo et al, 2007;Zaini et al, 2009;Su et al, 2010;Li et al, 2011;Abdullahi et al, 2013). Many are also compounds of fuels, solvents, hydraulic fluids and dry cleaning agents commonly used in urban settings such as bleach (Abdullahi et al, 2014;. Abdullahi and Chian (2011) studied VOCs in drinking water in peninsular Malaysia and detected 54 different VOC species in the samples analysed from 11 states which was attributed to improper disposal practice.…”

Section: Introductionmentioning

confidence: 97%

“…VOCs have been reported to be responsible for many acute and chronic health effects and environmental degradations such as global warming (Tan et al, 2008a;Su et al, 2010;Li et al, 2011). Air stripping, absorption, reverse osmosis, biological, thermal and catalytic oxidation, sonochemical and other advanced oxidation processes like Fenton, photo-Fenton, wet oxidation, ozonation, photo catalysis, electrochemical, membrane-based separation and non-thermal plasma are among the treatment methods for VOCs (Abdullahi et al, 2014), but they have limitations towards efficiency and cost.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of benzene and toluene onto KOH activated coconut shell based carbon treated with NH 3

Mohammed

Nasri

Zaini

et al. 2015

International Biodeterioration & Biodegradation

153

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Adsorption of benzene and toluene onto KOH activated coconut shell based carbon treated with NH 3

Mohammed

Nasri

Zaini

et al. 2015

International Biodeterioration & Biodegradation

153

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“…For example, an increase in temperature would lead to a pronounced reduction of liquid viscosity and surface tension of air bubbles, resulting in the formation of small and stable bubbles, and increases the probability of coalescence. It is this duality that alters the interfacial area and influences significantly on the mass transfer process (Chuang et al 1992, Zareei and Ghoreyshi 2011, Lin et al 2012, Abdullahi et al 2014). In addition, the change in physical properties of the liquid and gas change with increasing temperature has also a great influence Brought to you by | University of Pittsburgh Authenticated Download Date | 1/5/15 7:21 AM on diffusion coefficient.…”

Section: Effect Of Temperaturementioning

confidence: 96%

“…The resistance to the rate of mass transfer is therefore estimated by summing the resistances offered by the liquid-and gas-phase boundary layers. The rate of mass transfer of a VOC from wastewater to the atmosphere across an air-wastewater interface can be described by (Montgomery 1985, Hand et al 2011, Abdullahi et al 2014). …”

Section: Effect Of Temperaturementioning

confidence: 99%

Application of a packed column air stripper in the removal of volatile organic compounds from wastewater

Abdullahi

Hassan

Noor

et al. 2014

Reviews in Chemical Engineering

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Addressing environmental degradation and ensuring environmental sustainability are inextricably linked to all methods of reducing volatile organic compounds (VOCs) from the environment. A packed column air stripper is a typical example of such technologies for the removal of VOCs from polluted water. The present review is devoted to the applications of a packed column air stripper and, in comparison with previous reviews, presents further elaborations and new information on topics such as modeling and simulation of the dynamic behavior of the air stripping process in a packed column air stripper. The paper observed that a knowledge gap still exists in the synthesis of this knowledge to formulate practically applicable mathematical relationships to describe the process generally. Therefore, further researches are still required in the area of air stripper performance optimization, particularly in the development of a mathematical model and the optimization of an air stripper using a statistical experimental design method. Such a determination is critical to the understanding of the interactive effect of process variables such as temperature, air-to-water (A/W) ratio, and height of packing on air stripper performance.

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“…[7][8][9][10][11] BTEX are also present in the exhaust air of many water and wastewater stripping processes. [12][13][14] Due to their high toxic and genotoxic properties, [15] it is essential to minimize their migration into the environment and, above all, into the atmosphere, in order to protect workers and population health.…”

Section: Introductionmentioning

confidence: 99%

Experimental treatment of a refinery waste air stream, for BTEX removal, by water scrubbing and biotrickling on a bed ofMitilus edulisshells

Torretta

Collivignarelli

Raboni

et al. 2015

Environmental Technology

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The paper presents the results of a two-stage pilot plant for the removal of benzene, toluene, ethylbenzene and xylene (BTEX) from a waste air stream of a refinery wastewater treatment plant (WWTP). The pilot plant consisted of a water scrubber followed by a biotrickling filter (BTF). The exhausted air was drawn from the main works of the WWTP in order to prevent the free migration to the atmosphere of these volatile hazardous contaminants. Concentrations were detected at average values of 12.4 mg Nm(-3) for benzene, 11.1 mg Nm(-3) for toluene, 2.7 mg Nm(-3) for ethylbenzene and 9.5 mg Nm(-3) for xylene, with considerable fluctuation mainly for benzene and toluene (peak concentrations of 56.8 and 55.0 mg Nm(-3), respectively). The two treatment stages proved to play an effective complementary task: the water scrubber demonstrated the ability to remove the concentration peaks, whereas the BTF was effective as a polishing stage. The overall average removal efficiency achieved was 94.8% while the scrubber and BTF elimination capacity were 37.8 and 15.6 g BTEX d(-1) m(-3), respectively. This result has led to outlet average concentrations of 1.02, 0.25, 0.32 and 0.26 mg Nm(-3) for benzene, toluene, ethylbenzene and xylene, respectively. The paper also compares these final concentrations with toxic and odour threshold concentrations.

show abstract

Temperature and air–water ratio influence on the air stripping of benzene, toluene and xylene

Cited by 13 publications

References 25 publications

Adsorption of benzene and toluene onto KOH activated coconut shell based carbon treated with NH 3

Adsorption of benzene and toluene onto KOH activated coconut shell based carbon treated with NH 3

Application of a packed column air stripper in the removal of volatile organic compounds from wastewater

Experimental treatment of a refinery waste air stream, for BTEX removal, by water scrubbing and biotrickling on a bed ofMitilus edulisshells

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