Destruction of environmentally hazardous halogenated hydrocarbons in stable ionic liquids with superoxide ion radical

Saleem S. AlSaleem; Waleed M. Zahid; Inas M. Alnashef; Husnain Haider

doi:10.1016/j.seppur.2018.12.070

Destruction of environmentally hazardous halogenated hydrocarbons in stable ionic liquids with superoxide ion radical

Saleem S. AlSaleem
, Waleed M. Zahid
, Inas M. Alnashef
, Husnain Haider

Chemical and Petroleum Engineering

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Ionic liquids (ILs) have been investigated as a media for destruction of halogenated hydrocarbons (HHCs) because of their affinity to solubilize pollutants, hydrophobicity, ability to generate and maintain free radicals, and long term stability with superoxide ion radical (O₂^[rad]−). Three HHCs (CCl₄ CHCl₃, and CHBr₃) were successfully destructed by O₂^[rad]− in 13 hydrophobic ILs, including two piperidinium (PIP-ILs), four pyrrolidinium (PYRR-ILs), and seven ammonium-cation based ILs (AM-ILs). The effects of contact time and potassium superoxide (KO₂) dose on the destruction efficiency were evaluated using analysis of variance. 1-propyl -1- methylpiperidinium, 1-octyl-1-Methylpyrrolidinium, and octyltriethylammonium paired with bis (trifluoromethylsulfonyl) imide were found to be the best performers amongst PIP-ILs, PYRR-ILs, and AM-ILs. CHCl₃, CCl₄ and CHBr₃ consumed about 8, 11, and 14 KO₂/HHC mole ratio to achieve 95% of optimum destruction efficiency. High viscosity was identified as the main drawback of [N8881][Tf₂N] and [N4441][Tf₂N]. Destruction was moderately fast and steady state efficiency was achieved within 30 min. The strong correlations between empirical polarity E_T^N of HHCs, work as co-solvents, and destruction efficiencies were obtained with R² values higher than 0.99. The study presents a useful insight to use ILs as alternative solvents for treatment of hazardous wastes.

Original language	British English
Pages (from-to)	134-142
Number of pages	9
Journal	Separation and Purification Technology
Volume	215
DOIs	https://doi.org/10.1016/j.seppur.2018.12.070
State	Published - 15 May 2019

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 12 Responsible Consumption and Production

Keywords

Ammonium-based ionic liquids
Halogenated Hydrocarbons
Piperidinium
Pyrrolidinium
Superoxide ion radical

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title = "Destruction of environmentally hazardous halogenated hydrocarbons in stable ionic liquids with superoxide ion radical",

abstract = "Ionic liquids (ILs) have been investigated as a media for destruction of halogenated hydrocarbons (HHCs) because of their affinity to solubilize pollutants, hydrophobicity, ability to generate and maintain free radicals, and long term stability with superoxide ion radical (O2[rad]−). Three HHCs (CCl₄ CHCl3, and CHBr3) were successfully destructed by O2[rad]− in 13 hydrophobic ILs, including two piperidinium (PIP-ILs), four pyrrolidinium (PYRR-ILs), and seven ammonium-cation based ILs (AM-ILs). The effects of contact time and potassium superoxide (KO2) dose on the destruction efficiency were evaluated using analysis of variance. 1-propyl -1- methylpiperidinium, 1-octyl-1-Methylpyrrolidinium, and octyltriethylammonium paired with bis (trifluoromethylsulfonyl) imide were found to be the best performers amongst PIP-ILs, PYRR-ILs, and AM-ILs. CHCl3, CCl₄ and CHBr3 consumed about 8, 11, and 14 KO2/HHC mole ratio to achieve 95\% of optimum destruction efficiency. High viscosity was identified as the main drawback of [N8881][Tf2N] and [N4441][Tf2N]. Destruction was moderately fast and steady state efficiency was achieved within 30 min. The strong correlations between empirical polarity ETN of HHCs, work as co-solvents, and destruction efficiencies were obtained with R2 values higher than 0.99. The study presents a useful insight to use ILs as alternative solvents for treatment of hazardous wastes.",

keywords = "Ammonium-based ionic liquids, Halogenated Hydrocarbons, Piperidinium, Pyrrolidinium, Superoxide ion radical",

author = "AlSaleem, \{Saleem S.\} and Zahid, \{Waleed M.\} and Alnashef, \{Inas M.\} and Husnain Haider",

note = "Funding Information: The authors are thankful to the King Abdulaziz City for Science and Technology (KACST) for providing financial support for this research with Grant no. T-T-12-0002 to the College of Engineering, King Saud University, Saudi Arabia. We also acknowledge the support of Dr. Sarwono Mulyono from the Chemical Engineering Department, King Saud University, Saudi Arabia. Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

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doi = "10.1016/j.seppur.2018.12.070",

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T1 - Destruction of environmentally hazardous halogenated hydrocarbons in stable ionic liquids with superoxide ion radical

AU - AlSaleem, Saleem S.

AU - Zahid, Waleed M.

AU - Alnashef, Inas M.

AU - Haider, Husnain

N1 - Funding Information: The authors are thankful to the King Abdulaziz City for Science and Technology (KACST) for providing financial support for this research with Grant no. T-T-12-0002 to the College of Engineering, King Saud University, Saudi Arabia. We also acknowledge the support of Dr. Sarwono Mulyono from the Chemical Engineering Department, King Saud University, Saudi Arabia. Publisher Copyright: © 2019 Elsevier B.V.

PY - 2019/5/15

Y1 - 2019/5/15

N2 - Ionic liquids (ILs) have been investigated as a media for destruction of halogenated hydrocarbons (HHCs) because of their affinity to solubilize pollutants, hydrophobicity, ability to generate and maintain free radicals, and long term stability with superoxide ion radical (O2[rad]−). Three HHCs (CCl₄ CHCl3, and CHBr3) were successfully destructed by O2[rad]− in 13 hydrophobic ILs, including two piperidinium (PIP-ILs), four pyrrolidinium (PYRR-ILs), and seven ammonium-cation based ILs (AM-ILs). The effects of contact time and potassium superoxide (KO2) dose on the destruction efficiency were evaluated using analysis of variance. 1-propyl -1- methylpiperidinium, 1-octyl-1-Methylpyrrolidinium, and octyltriethylammonium paired with bis (trifluoromethylsulfonyl) imide were found to be the best performers amongst PIP-ILs, PYRR-ILs, and AM-ILs. CHCl3, CCl₄ and CHBr3 consumed about 8, 11, and 14 KO2/HHC mole ratio to achieve 95% of optimum destruction efficiency. High viscosity was identified as the main drawback of [N8881][Tf2N] and [N4441][Tf2N]. Destruction was moderately fast and steady state efficiency was achieved within 30 min. The strong correlations between empirical polarity ETN of HHCs, work as co-solvents, and destruction efficiencies were obtained with R2 values higher than 0.99. The study presents a useful insight to use ILs as alternative solvents for treatment of hazardous wastes.

AB - Ionic liquids (ILs) have been investigated as a media for destruction of halogenated hydrocarbons (HHCs) because of their affinity to solubilize pollutants, hydrophobicity, ability to generate and maintain free radicals, and long term stability with superoxide ion radical (O2[rad]−). Three HHCs (CCl₄ CHCl3, and CHBr3) were successfully destructed by O2[rad]− in 13 hydrophobic ILs, including two piperidinium (PIP-ILs), four pyrrolidinium (PYRR-ILs), and seven ammonium-cation based ILs (AM-ILs). The effects of contact time and potassium superoxide (KO2) dose on the destruction efficiency were evaluated using analysis of variance. 1-propyl -1- methylpiperidinium, 1-octyl-1-Methylpyrrolidinium, and octyltriethylammonium paired with bis (trifluoromethylsulfonyl) imide were found to be the best performers amongst PIP-ILs, PYRR-ILs, and AM-ILs. CHCl3, CCl₄ and CHBr3 consumed about 8, 11, and 14 KO2/HHC mole ratio to achieve 95% of optimum destruction efficiency. High viscosity was identified as the main drawback of [N8881][Tf2N] and [N4441][Tf2N]. Destruction was moderately fast and steady state efficiency was achieved within 30 min. The strong correlations between empirical polarity ETN of HHCs, work as co-solvents, and destruction efficiencies were obtained with R2 values higher than 0.99. The study presents a useful insight to use ILs as alternative solvents for treatment of hazardous wastes.

KW - Ammonium-based ionic liquids

KW - Halogenated Hydrocarbons

KW - Piperidinium

KW - Pyrrolidinium

KW - Superoxide ion radical

UR - https://www.scopus.com/pages/publications/85059743658

U2 - 10.1016/j.seppur.2018.12.070

DO - 10.1016/j.seppur.2018.12.070

M3 - Article

AN - SCOPUS:85059743658

SN - 1383-5866

VL - 215

SP - 134

EP - 142

JO - Separation and Purification Technology

JF - Separation and Purification Technology

ER -

Destruction of environmentally hazardous halogenated hydrocarbons in stable ionic liquids with superoxide ion radical

Abstract

UN SDGs

Keywords

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