Study on the synthesis of poly(pyrrole methane)s with the hydroxyl in different substituent position and their selective adsorption for Pb<SUP>2+</SUP>

作     者：Liu, Yunpeng Zhang, Wenlong Zhao, Chengcheng Wang, Hui Chen, Jie Yang, Liu Feng, Jiangtao Yan, Wei 

作者机构：Xi An Jiao Tong Univ State Key Lab Multiphase Flow Power Engn Dept Environm Sci & Engn Xian 710049 Shaanxi Peoples R China 

出 版 物：《CHEMICAL ENGINEERING JOURNAL》 (化学工程杂志)

年 卷 期：2019年第361卷

页      面：528-537页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0817[工学-化学工程与技术] 08[工学] 

基　　金：Shaanxi Key research and development projects, China [2017SF-386] National Natural Science Foundation of China [21307098, 21507104] Fundamental Research Funds for the Central Universities of China 

主　　题：Poly(pyrrole methane) Steric hindrance HASB theory Selective adsorption Heavy metal ions 

摘      要：Two poly(pyrrole methane)s (PPD2HBA and PPD3HBA) were successfully synthesized, with focusing on the effect of steric hindrance on the selective adsorption of heavy metal ions. The structure and morphology of PPD2HBA and PPD3HBA were characterized by FT-IR, UV-Vis, H-1 NMR, BET, SEM, XPS and Zeta potential. The influencing factors of the Pb2+-adsorption onto the two adsorbents were systematically studied, including various solution conditions and co-existing metal ions effect. These results demonstrated that the two adsorbents showed slightly different adsorption behaviors. The maximum adsorption capacities of Pb2+ onto PPD2HBA and PPD3HBA were 41.35 and 32.10 mg.g(-1) at pH= 6.0 and 318 K, respectively. The crucial steric hindrance verified by FT-IR and XPS before and after Pb2+ adsorption, showed better consistence in PPD2HBA with the size and shape of the hydrated Pb2+ than that in PPD3HBA, which can be further supported by the adsorption property of PPD4HBA. In addition, the effect of the co-existing metal ions of Pb2+ onto PPD2HBA and PPD3HBA could be testified by the HSBA theory. The proposed adsorption mechanism in this paper was of remarkable potential for the design of new adsorbent to selectively adsorb heavy metal ions from wastewater.