Adsorption and Desorption of Oxytetracycline and Carbamazepine by Multiwalled Carbon Nanotubes

被引：221

作者：

Oleszczuk, Patryk ^{[1
,2
]}

Pan, Bo ^{[1
,3
]}

Xing, Baoshan ^{[1
]}

机构：

[1] Univ Massachusetts, Dept Plant Soil & Insect Sci, Amherst, MA 01003 USA

[2] Univ Life Sci, Lab Soil Reclamat & Waste Management, Inst Soil Sci & Environm Management, PL-20069 Lublin, Poland

[3] Kunming Univ Sci & Technol, Coll Environm Sci & Technol, Yunnan 650093, Peoples R China

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2009年 / 43卷 / 24期

关键词：

POLYCYCLIC AROMATIC-HYDROCARBONS; ORGANIC-CHEMICALS; BLACK CARBON; NANOMATERIALS; SORPTION; TETRACYCLINE; BIOAVAILABILITY; HYSTERESIS; MECHANISMS; EXTRACTION;

D O I：

10.1021/es901928q

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

We investigated the adsorption-desorption by multiwalled carbon nanotubes (MWCNTs) of two pharmaceuticals, oxytetracycline (OTC) and carbamazepine (CBZ). The pharmaceuticals demonstrated relatively fast sorption kinetics on MWCNTs. All adsorption isotherms were nonlinear and fit the Polanyi-Manes model (PMM). The single point adsorption coefficient(K)values for OTC were more than 1 order of magnitude higher than those for CBZ on corresponding MWCNTs. The adsorbed volume capacity (Q) and K values of PMM showed a significant relationship with surface areas and the meso- and micropore volume of MWCNTs for both chemicals. Depending on the MWCNT outer diameter, 13.8-25.2% and 62.7-90.6% of initially adsorbed OTC and CBZ, respectively, were desorbed after 200 h. The rate of desorption of both OTC and CBZ depended upon pH and the quantity of initially adsorbed pharmaceuticals, as well as aggregation in the case of OTC.

引用

页码：9167 / 9173

页数：7

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