Effect of co-existing organic compounds on adsorption of perfluorinated compounds onto carbon nanotubes
Effect of co-existing organic compounds on adsorption of perfluorinated compounds onto carbon nanotubes
复制标题
共存有机化合物对碳纳米管吸附全氟化合物的影响
DOI：
10.1007/s11783-015-0790-1
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发表时间：
2015-10
期刊：
影响因子：
--
通讯作者：
Yu Gang
中科院分区：
文献类型：
--
作者：
Wang Bin;Wang Yujue;Huang Jun;Yu Gang
共存的有机化合物可能影响全氟化合物（pfc）和碳纳米管在水生环境中的吸附。研究了全氟辛烷磺酸（PFOS）、全氟辛烷酸（PFOA）、全氟丁烷磺酸（PFBS）和全氟己烷磺酸（PFHxS）在原始多壁碳纳米管（MWCNTs- pri）、羧基功能化MWCNTs （mwcnns - cooh）和羟基功能化MWCNTs （MWCNTs- oh）上在腐植酸、1-萘酚、苯酚和苯甲酸存在下的吸附性能。准二级吸附模型很好地描述了PFOS的吸附动力学，并在24 h内基本达到吸附平衡。共存有机物对PFOS吸附的影响顺序为腐植酸b> -萘酚b>苯甲酸b>苯酚。在腐植酸共存或预载腐植酸的情况下，PFOS的吸附量显著降低，3种MWCNTs上的吸附能和有效吸附位点均降低，导致PFOS吸附量减少。随着pH的增加，在腐植酸和苯酚存在下，3个MWCNTs对PFOS的去除率降低。不同PFCs在MWCNTs上的吸附量依次为PFBS<PFHxS<PFOA<PFOS。初始浓度和共存有机化合物芳香环数量的增加抑制了PFOS在MWCNTs上的吸附。
Co-existing organic compounds may affect the adsorption of perfluorinated compounds (PFCs) and carbon nanotubes in aquatic environments. Adsorption of perfluorooctane sulfonate (PFOS), perfluorooctane acid (PFOA), perfluorobutane sulfonate (PFBS), and perfluorohexane sulfonate (PFHxS) on the pristine multi-walled carbon nanotubes (MWCNTs-Pri), carboxyl functionalized MWCNTs (MWCTNs-COOH), and hydroxyl functionalized MWCNTs (MWCNTs-OH) in the presence of humic acid, 1-naphthol, phenol, and benzoic acid was studied. Adsorption kinetics of PFOS was described well by the pseudo-second-order model and the sorption equilibrium was almost reached within 24 h. The effect of co-existing organic compounds on PFOS adsorption followed the decreasing order of humic acid>1-naphthol>benzoic acid>phenol. Adsorbed amounts of PFOS decreased significantly in the presence of co-existing or preloaded humic acid, and both adsorption energy and effective adsorption sites on the three MWCNTs decreased, resulting in the decrease of PFOS adsorption. With increasing pH, PFOS removal by three MWCNTs decreased in the presence of humic acid and phenol. The adsorbed amounts of different PFCs on the MWCNTs increased in the order of PFBS<PFHxS<PFOA<PFOS. The increase of both initial concentrations and the number of aromatic rings of co-existing organic compounds suppressed PFOS adsorption on the MWCNTs.
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影响因子：
2.3
作者：
E. Kissa
通讯作者：
E. Kissa
全氟化合物在碳纳米管上的吸附机制
影响因子：
8.9
作者：
Deng, Shubo;Zhang, Qiaoying;Xing, Baoshan
通讯作者：
Xing, Baoshan
影响因子：
11.4
作者：
So, MK;Taniyasu, S;Lam, PKS
通讯作者：
Lam, PKS
影响因子：
11.4
作者：
L. C. Mota;E. Ureña-Benavides;Y. Yoon;A. Son
通讯作者：
L. C. Mota;E. Ureña-Benavides;Y. Yoon;A. Son
影响因子：
11.4
作者：
CARTER, MC;KILDUFF, JE;WEBER, WJ
通讯作者：
WEBER, WJ