Adsorption and desorption of dimethyl phthalate on carbon nanotubes in aqueous copper(II) solution

Jingwei Wang; Fei Wang; Jun Yao; Ruixia Wang; Haiyan Yuan; Kanaji Masakorala; Martin M.F. Choi

doi:10.1016/j.colsurfa.2012.10.058

Adsorption and desorption of dimethyl phthalate on carbon nanotubes in aqueous copper(II) solution

Jingwei Wang, Fei Wang, Jun Yao^*, Ruixia Wang, Haiyan Yuan, Kanaji Masakorala, Martin M.F. Choi

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

19 Citations (Scopus)

Abstract

The adsorption and desorption of dimethyl phthalate (DMP) on five types of carbon nanotubes (CNTs) were studied in the absence and presence of 50mg/L copper(II) (Cu²⁺) ion. The adsorption and desorption data are well described by the Freundlich model and the first-order two-compartment model, respectively. The adsorption capacity of CNTs for DMP is inversely related to the average outer diameter of the CNTs. The surface acidic functional groups of CNTs increases in the order of lactones < hydroxyl < carboxyl functionalities and decreases with the increase in the outer diameter. The adsorption of DMP on CNTs increases in the presence of Cu²⁺ ions. The adsorption coefficient increases in pH 3-6 and is nearly the same at pH > 6 for all CNTs. The presence of Cu²⁺ ions decreases the amounts of desorbed DMP from CNTs, inferring that Cu²⁺ ions could suppress the DMP desorption from CNTs and reduce DMP toxicity to our environment.

Original language	English
Pages (from-to)	47-56
Number of pages	10
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	417
DOIs	https://doi.org/10.1016/j.colsurfa.2012.10.058
Publication status	Published - Jan 2013

Scopus Subject Areas

Surfaces and Interfaces
Physical and Theoretical Chemistry
Colloid and Surface Chemistry

User-Defined Keywords

Adsorption
Carbon nanotubes
Copper(II) ions
Dimethyl phthalate
PH

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10.1016/j.colsurfa.2012.10.058

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title = "Adsorption and desorption of dimethyl phthalate on carbon nanotubes in aqueous copper(II) solution",

abstract = "The adsorption and desorption of dimethyl phthalate (DMP) on five types of carbon nanotubes (CNTs) were studied in the absence and presence of 50mg/L copper(II) (Cu2+) ion. The adsorption and desorption data are well described by the Freundlich model and the first-order two-compartment model, respectively. The adsorption capacity of CNTs for DMP is inversely related to the average outer diameter of the CNTs. The surface acidic functional groups of CNTs increases in the order of lactones < hydroxyl < carboxyl functionalities and decreases with the increase in the outer diameter. The adsorption of DMP on CNTs increases in the presence of Cu2+ ions. The adsorption coefficient increases in pH 3-6 and is nearly the same at pH > 6 for all CNTs. The presence of Cu2+ ions decreases the amounts of desorbed DMP from CNTs, inferring that Cu2+ ions could suppress the DMP desorption from CNTs and reduce DMP toxicity to our environment.",

keywords = "Adsorption, Carbon nanotubes, Copper(II) ions, Dimethyl phthalate, PH",

author = "Jingwei Wang and Fei Wang and Jun Yao and Ruixia Wang and Haiyan Yuan and Kanaji Masakorala and Choi, {Martin M.F.}",

note = "Funding Information: This work was supported by grants from the National Outstanding Youth Research Foundation of China ( 40925010 ), International Joint Key Project from National Natural Science Foundation of China ( 40920134003 ), International Joint Key Project from Chinese Ministry of Science and Technology ( 2011DFA00120 , 2009DFA92830 and 2010DFA92090 ), and National Natural Science Foundation of China ( 40873060 , 41103060 and 41273092 ), and the Fundamental Research Funds for the Central Universities ( FRF-TP-12–005A ) ",

year = "2013",

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doi = "10.1016/j.colsurfa.2012.10.058",

language = "English",

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journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",

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TY - JOUR

T1 - Adsorption and desorption of dimethyl phthalate on carbon nanotubes in aqueous copper(II) solution

AU - Wang, Jingwei

AU - Wang, Fei

AU - Yao, Jun

AU - Wang, Ruixia

AU - Yuan, Haiyan

AU - Masakorala, Kanaji

AU - Choi, Martin M.F.

N1 - Funding Information: This work was supported by grants from the National Outstanding Youth Research Foundation of China ( 40925010 ), International Joint Key Project from National Natural Science Foundation of China ( 40920134003 ), International Joint Key Project from Chinese Ministry of Science and Technology ( 2011DFA00120 , 2009DFA92830 and 2010DFA92090 ), and National Natural Science Foundation of China ( 40873060 , 41103060 and 41273092 ), and the Fundamental Research Funds for the Central Universities ( FRF-TP-12–005A )

PY - 2013/1

Y1 - 2013/1

N2 - The adsorption and desorption of dimethyl phthalate (DMP) on five types of carbon nanotubes (CNTs) were studied in the absence and presence of 50mg/L copper(II) (Cu2+) ion. The adsorption and desorption data are well described by the Freundlich model and the first-order two-compartment model, respectively. The adsorption capacity of CNTs for DMP is inversely related to the average outer diameter of the CNTs. The surface acidic functional groups of CNTs increases in the order of lactones < hydroxyl < carboxyl functionalities and decreases with the increase in the outer diameter. The adsorption of DMP on CNTs increases in the presence of Cu2+ ions. The adsorption coefficient increases in pH 3-6 and is nearly the same at pH > 6 for all CNTs. The presence of Cu2+ ions decreases the amounts of desorbed DMP from CNTs, inferring that Cu2+ ions could suppress the DMP desorption from CNTs and reduce DMP toxicity to our environment.

AB - The adsorption and desorption of dimethyl phthalate (DMP) on five types of carbon nanotubes (CNTs) were studied in the absence and presence of 50mg/L copper(II) (Cu2+) ion. The adsorption and desorption data are well described by the Freundlich model and the first-order two-compartment model, respectively. The adsorption capacity of CNTs for DMP is inversely related to the average outer diameter of the CNTs. The surface acidic functional groups of CNTs increases in the order of lactones < hydroxyl < carboxyl functionalities and decreases with the increase in the outer diameter. The adsorption of DMP on CNTs increases in the presence of Cu2+ ions. The adsorption coefficient increases in pH 3-6 and is nearly the same at pH > 6 for all CNTs. The presence of Cu2+ ions decreases the amounts of desorbed DMP from CNTs, inferring that Cu2+ ions could suppress the DMP desorption from CNTs and reduce DMP toxicity to our environment.

KW - Adsorption

KW - Carbon nanotubes

KW - Copper(II) ions

KW - Dimethyl phthalate

KW - PH

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U2 - 10.1016/j.colsurfa.2012.10.058

DO - 10.1016/j.colsurfa.2012.10.058

M3 - Journal article

AN - SCOPUS:84870562668

SN - 0927-7757

VL - 417

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EP - 56

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

ER -

Adsorption and desorption of dimethyl phthalate on carbon nanotubes in aqueous copper(II) solution

Abstract

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