文献类型：期刊文献

英文题名：Using of carbon nanofibers as effective scavengers for the uptake of Co(II) and Ni(II) in water by batch investigations

作者：Hu, Qingyuan[1];Zhao, Qingzhou[2];Hu, Baowei[1];Zhu, Yuling[1];Sheng, Guodong[1];Asiri, Abdullah M.[3];Marwani, Hadi M.[3]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Coll Life Sci, Shaoxing 312000, Zhejiang, Peoples R China;[2]Univ Chinese Acad Sci, Coll Resources & Environm, 19 A Yuquan Rd, Beijing 100049, Peoples R China;[3]King Abdulaziz Univ, Fac Sci, Chem Dept, Jeddah 21589, Saudi Arabia

年份：2018

卷号：136

起止页码：299

外文期刊名：DESALINATION AND WATER TREATMENT

收录：SCI-EXPANDED(收录号：WOS:000452207000031)、、Scopus(收录号：2-s2.0-85058228881)、WOS

基金：Financial supports from China Postdoctoral Science Foundation Grant (2016M591140, 2017T100055) are acknowledged.

语种：英文

外文关键词：Carbon nanofibers; Uptake; Scavenging; Co(II); Ni(II)

外文摘要：Carbon nanofibers (CNFs) have been extensively investigated due to their strong uptake and complexation ability. In this work, CNFs was characterized by using SEM, TEM, FTIR, XPS and Raman spectra. The uptake of Co(II) and Ni(II) on bacterium-derived CNFs as a function of contact time, pH, ionic strength and temperature was investigated using batch techniques. The pH-dependent uptake indicated that the uptake of Co(II) and Ni(II) onto CNFs was significantly higher at high pH values than that at low pH values. The uptake of Co(II) and Ni(II) onto CNFs was hardly affected by ionic strength, suggesting the formation of inner-sphere surface complexation of Co(II) and Ni(II) onto CNFs over a wide pH range. The Langmuir model described the uptake of Co(II) and Ni(II) onto CNFs better than the other models did. According to regeneration experiments, CNFs displayed good recoverability and recyclability in the Co(II) and Ni(II) uptake process. The findings presented herein play a significant role in the scavenging of metal ions on inexpensive and available CNFs in environmental cleanup applications.