文献类型：期刊文献

英文题名：Macroscopic and molecular investigations of immobilization mechanism of uranium on biochar: EXAFS spectroscopy and static batch

作者：Li, Xue[1];Pan, Hui[1];Yu, Mei[2];Wakeel, Muhammad[3];Luo, Jie[1];Alharbi, Njud S.[4];Liao, Qing[5];Liu, Juan[6]

机构：[1]Shaoxing Univ, Coll Yuanpei, Shaoxing 312000, Peoples R China;[2]Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China;[3]Bahauddin Zakariya Univ, Dept Environm Sci, Multan, Pakistan;[4]King Abdulaziz Univ, Dept Biol, Jeddah, Saudi Arabia;[5]Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Peoples R China;[6]Guangzhou Univ, Coll Environm Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China

年份：2018

卷号：269

起止页码：64

外文期刊名：JOURNAL OF MOLECULAR LIQUIDS

收录：SCI-EXPANDED(收录号：WOS:000447482500008)、、EI(收录号：20183305686522)、Scopus(收录号：2-s2.0-85051256355)、WOS

基金：Financial supports from the National Natural Science Foundation of China (51372199) and the research project of Department of Education of Zhejiang Province (Y201431557) are acknowledged.

语种：英文

外文关键词：Capture mechanism; Biochar; EXAFS; U(vi)

外文摘要：A new environmentally friendly and low-cost adsorbent was produced from the camphor tree leaves (BC@CTL) and used to remove U(VI) from waste water via batch capture experiments under varying pH, time, and U(VI) concentration. The resultant biochar was characterized by SEM, BET, zeta-potentials, and FTIR spectroscopy. The capture process was strongly dependent on pH and independent of ionic strength. The capture experimental results indicated that U(VI) was quickly captured to BC@CTL with a maximum capture capacity of 0.41 mmol U (VI) g(-1), obtained by Langmuir model fitting. The results of EXAFS analysis revealed that the interaction mechanism of U(VI) on the BC@CTL was primarily controlled by inner-sphere surface complexation. The investigation was meaningful for the "treating wastewater with wastes" strategy implementation, especially biochar can be regarded as a promising candidate for the pre-concentration and immobilization of radionuclides from aqueous solutions in environmental remediation. (C) 2018 Elsevier B.V. All rights reserved.