Mechanism of dialkyl phthalates removal from aqueous solution using γ-cyclodextrin and starch based polyurethane polymer adsorbents

被引：72

作者：

Okoli, Chukwunonso Peter ^{[1
]}

Adewuyi, Gregory Olufemi ^{[2
]}

Zhang, Qian ^{[1
]}

Diagboya, Paul N. ^{[2
,3
]}

Guo, Qingjun ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Ctr Environm Remediat, Beijing, Peoples R China

[2] Univ Ibadan, Dept Chem, Analyt Environm Chem Unit, Ibadan, Nigeria

[3] Chinese Acad Sci, Natl Ctr Nanosci & Nanotechnol, Beijing, Peoples R China

来源：

CARBOHYDRATE POLYMERS | 2014年 / 114卷

关键词：

Phthalates; Polyurethane polymer; gamma-cyclodextrin; Starch; Adsorption; ORGANIC CONTAMINANTS; ESTERS; SORPTION; ADSORPTION; EPICHLOROHYDRIN; BIOMASS; SOILS; WATER;

D O I：

10.1016/j.carbpol.2014.08.016

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Phthalate esters have been known as potent endocrine disruptors and carcinogens; and their removal from water have been of considerable concern recently. In the present study, gamma-cyclodextrin polyurethane polymer (GPP), gamma-cyclodextrin/starch polyurethane copolymer (GSP), and starch polyurethane polymer (SPP) have been synthesized and characterized. Their adsorption efficiencies for the removal of dimethyl phthalate (DMP) and diethyl phthalate (DEP) from aqueous solutions were investigated. The characterization results showed the success of the synthesis. The isotherms were L-type, and both the Langmuir and Freundlich adsorption isotherm gave good fittings to the adsorption data. Adsorption mechanisms suggested that these adsorbents spontaneously adsorb phthalate molecules driven mainly by enthalpy change, and the adsorption process was attributed to multiple adsorbent-adsorbate interactions such as hydrogen bonding, pi-pi stacking, and pore filling. The results showed that starch and gamma-cyclodextrin polyurethane polymer adsorbents have excellent potential as adsorbent materials for the removal of phthalates from the contaminated water. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：440 / 449

页数：10

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