Selective removal of Pb(II), Cd(II), and Zn(II) ions from waters by an inorganic exchanger Zr(HPO3S)2 |
| |
| Authors: | Qingrui Zhang Bingcai Pan Weiming Zhang Bingjun Pan Lu Lv Xiaosu Wang Jun Wu Xiancong Tao |
| |
| Affiliation: | aState Key Laboratory of Pollution Control and Resource Reuse, and School of the Environment, Nanjing University, Nanjing 210093, PR China;bModern Analysis Center, Nanjing University, Nanjing 210093, PR China |
| |
| Abstract: | The present study reported synthesis of a new inorganic exchanger, i.e., zirconium hydrogen monothiophosphate Zr(HPO3S)2, denoted ZrPS] and its selective sorption toward Pb(II), Cd(II) and Zn(II) ions. ZrPS sorption toward all the three metals is dependent upon solution pH due to the ion-exchange nature. As compared to another inorganic exchanger zirconium phosphate Zr(HPO4)2, denoted ZrP], ZrPS exhibits highly selective sorption toward these toxic metals from the background of calcium ions at great levels. Such sorption preference is mainly attributed to the presence of –SH group in ZrPS, as further demonstrated by FT-IR analysis and XPS study. Moreover, ZrPS particles preloaded with heavy metals could be efficiently regenerated with 6 M HCl for multiple use without any noticeable capacity loss. All the experimental results indicated that ZrPS is a promising sorbent for enhanced heavy metals removal from contaminated water. |
| |
| Keywords: | Zr(HPO3S)2 Heavy metals Sorption Regeneration Mechanism |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
