Effects of Solution Chemistry on the Adsorption of Ibuprofen and Triclosan onto Carbon Nanotubes

被引：213
作者：
Cho, Hyun-Hee [2 ]
Huang, Haiou [1 ]
Schwab, Kellogg [1 ]
机构：
[1] Johns Hopkins Bloomberg Sch Publ Hlth, Dept Environm Hlth Sci, Baltimore, MD 21205 USA
[2] Hanyang Univ, Dept Civil & Environm Engn, Seoul 133791, South Korea
来源：
LANGMUIR | 2011年 / 27卷 / 21期
关键词：
PERSONAL CARE PRODUCTS; POLYCYCLIC AROMATIC-HYDROCARBONS; SEWAGE-TREATMENT PLANTS; ACTIVATED CARBON; SIMULTANEOUS QUANTIFICATION; ORGANIC-CHEMICALS; IONIC-STRENGTH; WATER; PHARMACEUTICALS; SORPTION;
D O I：
10.1021/la202459g
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Single-walled carbon nanotubes (SWCNTs), multiwalled carbon nanotubes (MWCNTs), and oxidized MWCNTs (O-MWCNTs) were studied for the adsorption of ibuprofen (MU) and triclosan (TCS) as representative types of pharmaceutical and personal care products (PPCPs) under different chemical solution conditions. A good fitting of sorption isotherms was obtained using a Polanyi-Manes model (PMM). IBU and TCS sorption was stronger for SWCNTs than for MWCNTs due to higher specific surface area. The high oxygen content of O-MWCNT further. depressed PPCP sorption. The sorption capacity of PPCPs was found to be pH-dependent, and more adsorption was observed at pHs below their plc values. Ionic strength was also found to substantially affect TCS adsorption, with higher adsorption capacity observed for TCS at lower ionic strength. In the presence of a reference aquatic fulvic acid (FA), sorption of IBU and TCS was reduced due to the competitive sorption of FA on carbon nanotubes (CNTs). Sorption isotherm results with SWCNTs, MWCNTs and O-MWCNTs confirmed that the surface chemistry of CNTs, the chemical properties of PPCPs, and aqueous solution chemistry (pH, ionic strength, fulvic acid) all play an important role in PPCP adsorption onto CNTs.
引用
收藏
页码：12960 / 12967
页数：8
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