文献类型：期刊文献

英文题名：Sorption of radionickel to goethite: Effect of water quality parameters and temperature

作者：Hu, Baowei[2,3];Cheng, Wen[3];Zhang, Hui[1];Sheng, Guodong[1,2]

机构：[1]Chinese Acad Sci, Inst Plasma Phys, Key Lab Novel Thin Film Solar Cells, Hefei 230031, Peoples R China;[2]ShaoXing Univ, Sch Life Sci, Shaoxing 312000, Zhejiang, Peoples R China;[3]Xian Univ Technol, Educ Minist, Key Lab Norhwest Water Rwsources & Enviromental E, Xian 710048, Peoples R China

年份：2010

卷号：285

期号：2

起止页码：389

外文期刊名：JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY

收录：SCI-EXPANDED(收录号：WOS:000279685700029)、、EI(收录号：20242616541104)、Scopus(收录号：2-s2.0-77955513810)、WOS

基金：Financial supports from the National Natural Science Foundation of China (90610030, 20907055; 20971126), and Knowledge Innovation Program of CAS are acknowledged.

语种：英文

外文关键词：Goethite; Sorption; Humic acid; Fulvic acid; Thermodynamic data

外文摘要：In this work, sorption of Ni(II) from aqueous solution to goethite as a function of various water quality parameters and temperature was investigated. The results indicated that the pseudo-second-order rate equation fitted the kinetic sorption well. The sorption of Ni(II) to goethite was strongly dependent on pH and ionic strength. A positive effect of HA/FA on Ni(II) sorption was found at pH < 8.0, whereas a negative effect was observed at pH > 8.0. The Langmuir, Freundlich, and D-R models were applied to simulate the sorption isotherms at three different temperatures of 293.15 K, 313.15 K and 333.15 K. The thermodynamic parameters (Delta H (0), Delta S (0) and Delta G (0)) were calculated from the temperature dependent sorption, and the results indicated that the sorption was endothermic and spontaneous. At low pH, the sorption of Ni(II) was dominated by outer-sphere surface complexation or ion exchange with Na+/H+ on goethite surfaces, whereas inner-sphere surface complexation was the main sorption mechanism at high pH.