文献类型：期刊文献

英文题名：Sorption properties of U(VI) and Th(IV) on two-dimensional Molybdenum Disulfide (MoS2) nanosheets: Effects of pH, ionic strength, contact time, humic acids and temperature

作者：Li, Xue[1];Li, Qian[1];Linghu, Wensheng[1];Shen, Runpu[1];Zhao, Baoshan[1];Dong, Lijia[1];Alsaedi, Ahmed[2];Hayat, Tasawar[2,3];Wang, Jin[4];Liu, Juan[4]

机构：[1]Shaoxing Univ, Sch Chem & Chem Engn, Coll Yuanpei, Coll Life Sci, Shaoxing 312000, Zhejiang, Peoples R China;[2]King Abdulaziz Univ, Fac Sci, Dept Math, NAAM Res Grp, Jeddah 21589, Saudi Arabia;[3]Quaid I Azam Univ, Dept Math, Islamabad 44000, Pakistan;[4]Guangzhou Univ, Coll Environm Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China

年份：2018

卷号：11

起止页码：328

外文期刊名：ENVIRONMENTAL TECHNOLOGY & INNOVATION

收录：SCI-EXPANDED(收录号：WOS:000440618800025)、、WOS

基金：Financial support from the National Natural Science Foundation of China (31700476) is greatly acknowledged.

语种：英文

外文关键词：MoS2; U(VI); Th(IV); Sorption; HA; Thermodynamic parameters

外文摘要：Herein, the two-dimensional MoS2 nanosheet was characterized and its performance as an adsorbent for U(VI) and Th(IV) removal from water was evaluated in batch experiments. The results showed that MoS(2)nanosheets have a thin thickness and few negligible impurities. Both U(VI) and Th(IV) sorption on MoS(2 )were obviously enhanced by high pH and the oxygen-containing group on the surface of MoS2 increased with an increase of pH. However, the sorption was not affected by ionic strength, suggesting that inner-sphere surface complexation dominated the two sorption processes. The removal efficiency of Th(IV) by MoS2 was higher than that of U(VI) in solutions containing different cations and anions. The adsorption equilibrium for U(VI)/Th(IV) was achieved within 2 h and pseudo-second-order equation showed favorable fit. HA significantly increased the uptake of U(VI)/Th(IV) at pH <7.5/6, while decreased the sorption at pH >7.5/6. Freundlich model provided more fit to the equilibrium data than Langmuir model at pH 5.5. The maximum sorption amount of MoS2 for U(VI)/Th(IV) run up to 492.72/454.72 mg center dot g(-1), obviously higher than the amounts of some other materials. The U(VI)/Th(IV) sorption was a spontaneous and endothermic process. All these results suggested the potential applicable value of MoS2 nanosheets in removing U(VI) or Th(IV) from aqueous solutions. (C) 2018 Elsevier B.V. All rights reserved.