Enhanced adsorption of ionizable aromatic compounds on humic acid-coated carbonaceous adsorbents (Retracted article. See vol. 10, pg. 15925, 2020)
Enhanced adsorption of ionizable aromatic compounds on humic acid-coated carbonaceous adsorbents (Retracted article. See vol. 10, pg. 15925, 2020)
复制标题
DOI：
10.1039/c2ra21713a
复制
发表时间：
2012-01-01
期刊：
影响因子：
3.9
通讯作者：
Wang, Xiangke
中科院分区：
文献类型：
--
作者：
Sun, Yubing;Chen, Changlun;Wang, Xiangke
采用间歇吸附技术研究了腐植酸(HA)包覆的氧化石墨烯纳米片(GON)、多壁碳纳米管(MWCNTs)、活性碳(AC)和鳞片石墨(FG)对可电离芳香族化合物(IAC)的吸附。4种HA涂层炭质吸附剂对1-萘胺的吸附对pH的依赖性较弱，而1-萘酚在这些HA涂层炭质吸附剂上的吸附随pH值从2.0增加到8.0而明显增加。羟基磷灰石涂层碳质吸附剂对IAC的最大吸附容量大小顺序为GONS>；>；MWCNTs>；AC>；FG，表明GONS可作为环境污染治理中预富集和去除水溶液中IAC的合适材料。炭质吸附剂与IAC之间的主要吸附机理是疏水作用。这一观察结果对环境应用中HA包覆的碳质吸附材料去除IAC具有重要意义。
Adsorption of ionizable aromatic compounds (IACs) such as 1-naphthylamine and 1-naphthol on Humic acid (HA)-coated graphene oxide nanosheets (GONs), multiwalled carbon nanotubes (MWCNTs), activated carbon (AC), and flake graphite (FG) were investigated by the batch techniques. The adsorption of 1-naphthylamine on four HA-coated carbonaceous adsorbents was weakly depended on pH, whereas the adsorption of 1-naphthol on these HA-coated carbonaceous adsorbents evidently increased with increasing pH from 2.0 to 8.0. The maximum adsorption capacity of HA-coated carbonaceous adsorbents for IACs was in the order of GONs >> MWCNTs > AC >FG, indicating that the GONs can be regarded as a suitable material for the preconcentration and removal of IACs from aqueous solution in environmental pollution management. The main adsorption mechanism between carbonaceous adsorbents and IACs is the hydrophobic effect. This observation is of great implication for the removal of IACs by HA-coated carbonaceous adsorbents in environmental applications.