Dichloromethane emissions from automotive manufacturing industry in Iran: case study of the SAIPA automotive manufacturing company

Abtahi, Mehrnoosh; Naddafi, Kazem; Mesdaghinia, Alireza; Yaghmaeian, Kamyar; Nabizadeh, Ramin; Jaafarzadeh, Neemat; Rastkari, Noushin; Saeedi, Reza; Nazmara, Shahrokh

doi:10.1080/02772248.2013.821126

Cited by 9 publications

(7 citation statements)

References 15 publications

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“…The mechanism of persulfate oxidation via heat catalysts, which caused sulfate radicals generation to remove pyrene, can be expressed via Eqs. (6)(7)(8)(9)(10) . The production of sulfate radicals in solution could cause the production of the hydroxyl radical (HO • , E o = + 2.7 V) through radical inter-conversion reactions 56 .…”

Section: Effect Of Moisture Contentmentioning

confidence: 99%

“…Until now, different physicochemical, thermal, and biological methods have been applied for decontamination of polluted soils. However, these methods are often costly and energy-intensive, and are almost ineffective and could, in turn, remain secondary toxic materials, which are potentially harmful to the environment [8][9][10][11] . Thus, electrochemical removal has been considered as a reliable technology for the remediation of contaminated soils 12,13 .…”

Section: Introductionmentioning

confidence: 99%

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A Novel Combination of Surfactant Addition and Persulfate-assisted Electrokinetic Oxidation for Remediation of Pyrene-Contaminated Soil

Abtahi

Jorfi

Mehrabi

et al. 2018

Chem.Biochem.Eng.Q.

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Effect of surfactant addition on persulfate-assisted electrokinetic remediation of pyrene-spiked soil was studied. The influence of effective factors including voltage, surfactant addition, moisture content, and persulfate concentration on the removal of initial pyrene concentration of 200 mg kg-1 were investigated. A complete pyrene removal was observed for voltage of 1 V cm-1 , saturated conditions, Tween 80 concentration of 20 mL kg-1 , and persulfate concentration of 100 mg kg-1 after 24 h, corresponding to pyrene mineralization of 61 %, based on TPH analysis. The experimental results were best fitted with pseudo-first-order kinetic model with correlation coefficient of 0.968 and rate constant of 0.191 min −1. The main intermediates of pyrene degradation were benzene o-toluic acid, acetic, azulene, naphthalene and decanoic acid. Finally, an unwashed hydrocarbon-contaminated soil was subjected to persulfate-assisted electrokinetic remediation, and a TPH removal of 38 % was observed for the initial TPH content of 912 mg kg-1 , under the selected conditions.

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Section: Effect Of Moisture Contentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Novel Combination of Surfactant Addition and Persulfate-assisted Electrokinetic Oxidation for Remediation of Pyrene-Contaminated Soil

Abtahi

Jorfi

Mehrabi

et al. 2018

Chem.Biochem.Eng.Q.

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“…Automobile spraying shops are one of the main sources of VOC emission because of the massive use of organic solvents. , In some countries from the Americas and Europe, water-based paints have been developed and used for the abatement of organic solvents. However, the emission of VOCs is still a great concern and challenge for governments and companies.…”

Section: Introductionmentioning

confidence: 99%

Binary Adsorption Equilibrium and Breakthrough of n-Butyl Acetate and p-Xylene on Granular Activated Carbon

Jiang

Liu

et al. 2019

Ind. Eng. Chem. Res.

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Compared with abatement methods (regenerative thermal oxidizer, regenerative catalytic oxidizer, etc.), the adsorption−desorption combined method has been considered as a sustainable way to treat and recover volatile organic compounds (VOCs) from off-gases in painting or coating industries. It also helps to reduce the production of waste adsorbents compared with the traditional single-adsorption process. Herein, n-butyl acetate and p-xylene are selected as the representatives of oxygenated volatile organic compounds and nonmethane hydrocarbons of automotive coating solvents, respectively, to test their adsorption behaviors on coal-based granular activated carbon. The single-component adsorption tests show that both the VOCs are adsorbed on the activated carbon surface as a monolayer model. Compared with single-component adsorption, it is found that a competitive adsorption happens between n-butyl acetate and p-xylene when they are mixed together for adsorption. Results clearly show that the displacement of weakly adsorbed n-butyl acetate by strongly adsorbed p-xylene results in less uptake of n-butyl acetate in binary adsorption (0.265 g•g −1 ) than in single-component adsorption (0.333 g•g −1 ). The dynamic adsorption of a binary mixture on activated carbon is found to be well-fitted mathematically by the extended Langmuir model and ideal adsorbed solution theory with average relative error less than 7% and 12%, respectively. After the adsorption model of the typical binary VOCs was obtained, the operational conditions were further optimized to understand the adsorption mechanism. It is shown that increasing the inlet concentration or feed flow rate is observed to be favorable for adsorption capacity and competitive behavior of the binary mixture. Finally, a simple adsorption mechanism for the binary mixture on activated carbon has been proposed. These findings will provide fundamental information for the recovery of VOCs through adsorption−desorption processes.

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“…Dichloromethane (DCM) and methanol (MeOH) are both excellent organic solvents and are widely used as solvents in the pharmaceutical industry, such as in the production of prednisone and antibiotics. , During these processes, large amounts of waste effluent are generated, which consist of a binary mixture of DCM and MeOH in significant proportions. The waste effluents with large amounts of DCM pose a potential threat to human health and the environment. − On the other hand, as an active step, separating these components and recovering the chemical feedstock would be of significant benefits and would be necessary to meet rigorous environmental and resource-saving regulations for modern chemical industry. Moreover, the demands for the treatment of these waste effluents increase sharply with the rapid growth of the antibiotic industry…”

Section: Introductionmentioning

confidence: 99%

Extractive Dividing-Wall Column Distillation with a Novel Control Structure Integrating Pressure Swing and Pressure Compensation

Jing

Zhu

Dang

et al. 2021

Ind. Eng. Chem. Res.

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In this work, an energy-efficient extractive dividingwall column process with heat integration (E-DWC-HI) is proposed for the first time to separate the dichloromethane (DCM)−methanol (MeOH) azeotrope, which is a widely existing waste effluent in the pharmaceutical industry. The result of economic evaluation shows that the E-DWC-HI process is a preferred choice for the separation of DCM−MeOH mixture. Designing a robust control strategy is essential for the E-DWC-HI process. Thus, four control structures are proposed and tested under the disturbances of ±20% feed flow rate and ±5% feed composition. The basic control structure (CS1) and the double temperature difference control structure (CS2) both have a fixed vapor split. The dynamic response shows that the required purity cannot be met due to the loss of an important control degree of freedom. In CS3, variable vapor split is carried out by adjusting the pressures on the two sides of the dividing wall, and all product purities are held close to their set points except for MeOH product purity with an obvious offset. The dynamic performance of CS4 has been significantly improved by integrating pressure swing and pressure compensation. The offset of MeOH product purity is significantly reduced from 2.05 to 0.03%.

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Dichloromethane emissions from automotive manufacturing industry in Iran: case study of the SAIPA automotive manufacturing company

Cited by 9 publications

References 15 publications

A Novel Combination of Surfactant Addition and Persulfate-assisted Electrokinetic Oxidation for Remediation of Pyrene-Contaminated Soil

A Novel Combination of Surfactant Addition and Persulfate-assisted Electrokinetic Oxidation for Remediation of Pyrene-Contaminated Soil

Binary Adsorption Equilibrium and Breakthrough of n-Butyl Acetate and p-Xylene on Granular Activated Carbon

Extractive Dividing-Wall Column Distillation with a Novel Control Structure Integrating Pressure Swing and Pressure Compensation

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