CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, Anhui, PR China; University of Science and Technology of China, Hefei 230026, Anhui, PR China.
CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, Anhui, PR China.
J Colloid Interface Sci. 2018 Nov 15;530:154-162. doi: 10.1016/j.jcis.2018.06.083. Epub 2018 Jun 27.
β-cyclodextrin decorated graphene oxides (β-CD-GO) was prepared by using an in-situ aggregation treatment, and used to remove inorganic (Pb(II)) and organic pollutants (1-naphthol) from water environment. The batch adsorption experiments of as-prepared β-CD-GO were carried out as a function of pH values, initial Pb(II) and 1-naphthol concentration, ionic strength, contact time and temperature. β-CD-GO kinetic results indicated that the adsorption was dominated by chemisorptions and followed a pseudo-second order model. The maximum adsorption capacities of β-CD-GO toward Pb(II) and 1-naphtholon the base of the Langmuir model were 149.56 and 207.6 mg·g at 293 K, respectively. The thermodynamic experiments revealed that the adsorption of Pb(II) and 1-naphthol was spontaneous and endothermic. The surface compexation, hydrogen bonds and π-π interactions contributed to Pb(II) and 1-naphthol adsorption by means of the hydroxy and carboxyl functional groups on the surface of the β-CD-GO. The experimental results indicate that the β-CD-GO is an excellent composite for the elimination of Pb(II) and 1-naphthol from wastewater.
β-环糊精修饰氧化石墨烯（β-CD-GO）通过原位聚集处理制备，并用于从水环境中去除无机（Pb(II)）和有机污染物（1-萘酚）。作为功能的 pH 值、初始 Pb(II)和 1-萘酚浓度、离子强度、接触时间和温度的批次吸附实验进行了预制备的β-CD-GO。β-CD-GO 的动力学结果表明，吸附主要由化学吸附控制，并遵循准二级模型。基于 Langmuir 模型，β-CD-GO 对 Pb(II)和 1-萘酚的最大吸附容量分别为 149.56 和 207.6mg·g，在 293K 下。热力学实验表明，Pb(II)和 1-萘酚的吸附是自发和吸热的。表面络合、氢键和π-π相互作用通过β-CD-GO 表面的羟基和羧基官能团促进了 Pb(II)和 1-萘酚的吸附。实验结果表明，β-CD-GO 是一种从废水中去除 Pb(II)和 1-萘酚的优良复合材料。
