文献类型：期刊文献

英文题名：Sequestration of Ni(II) onto graphene oxide from synthetic wastewater as affected by coexisting constituents

作者：Li, Xue[1];Yu, Mei[2];Lv, Qingmei[1];Tan, Yongsheng[2]

机构：[1]Shaoxing Univ, Coll Yuanpei, Shaoxing 312000, Peoples R China;[2]Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China

年份：2016

卷号：57

期号：44

起止页码：20904

外文期刊名：DESALINATION AND WATER TREATMENT

收录：SCI-EXPANDED(收录号：WOS:000382975100027)、、Scopus(收录号：2-s2.0-84946430882)、WOS

基金：Financial supports from the National Natural Science Foundation of China (11204180) and the Zhejiang Provincial Natural Science Foundation of China (LQ13A040004) are acknowledged.

语种：英文

外文关键词：Sequestration; Ni(II); Graphene oxide; Coexisting constituents

外文摘要：This article examines the sequestration of Ni(II) onto graphene oxide (GO) by an adsorption process using batch technique. The role of contact time, medium pH, and coexisting constituents like humic acid (HA) and/or fulvic acid (FA) in the adsorption of Ni(II) onto GO was studied. The results indicated that the adsorption of Ni(II) onto GO increased from similar to 20 to similar to 95% at pH 2.0-9.0, and then maintained the high level with increasing pH. Kinetic data showed that the adsorption obtained equilibrium quickly and was fitted well by the pseudo-second-order equation. The presence of HA/FA imposing a positive role Ni(II) adsorption onto GO was found at pH<8.0, whereas a negative role in the adsorption of Ni(II) onto GO was observed at pH>8.0. The thermodynamic analysis from the temperature-dependent adsorption isotherms suggests that the adsorption of Ni(II) onto GO is spontaneous and endothermic. Experimental results provided evidence that the adsorption of Ni(II) onto GO was mainly attributed to surface complexation. These findings indicate that GO is a suitable material in the solidification and immobilization of Ni(II) from aqueous solutions in the wastewater treatment.