Calix[4]arene-clicked clay through thiol-yne addition for the molecular recognition and removal of Cd(II) from wastewater

被引：24
作者：
Jlassi, Khouloud [1 ]
Eid, Kamel [1 ]
Sliem, Mostafa H. [1 ]
Abdullah, Aboubakr M. [1 ]
Chehimi, Mohamed M. [2 ]
机构：
[1] Qatar Univ, Ctr Adv Mat, POB 2713, Doha, Qatar
[2] Univ Paris Est Creteil, UMR7182, ICMPE, CNRS, F-94320 Thiais, France
来源：
SEPARATION AND PURIFICATION TECHNOLOGY | 2020年 / 251卷
关键词：
Heavy metals removal; Calix[4]arene; Bentonite; Photo-induced Thiol-Yne Click chemistry; Wastewater treatment; Cd(II) removal; HEAVY-METAL; MODIFIED MONTMORILLONITE; IMPRINTED POLYMERS; ADSORPTION; IONS; FUNCTIONALIZATION; NANOCOMPOSITE; MEMBRANES; CADMIUM; NANOPARTICLES;
D O I：
10.1016/j.seppur.2020.117383
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
A novel type of hybrid Clay/Calix[4]arene (denoted as B-S-Calix), was prepared through fast photo-induced radical-mediated thiol-yne addition between a thiolated clay and an alkynylated calix[4]arene. The photo induced radical-mediated thiol-yne reaction is a smart, low-cost, efficient, and fast pathway for tailoring low cost, reactive, and functional clay-based materials for potential wastewater treatment applications. The obtained materials were analyzed using X-ray photoelectron spectrometry (XPS), Fourier transform infrared spectroscopy (FTIR), and proton nuclear magnetic resonance spectroscopy (HNMR), which all displayed the successful formation of B-S-Calix. The as-synthesized B-S-Calix was used as an adsorbent for toxic Cd(II) metal from wastewater compared to mercaptosilanized bentonite (B-S) at room temperature. The adsorption of Cd(II) on B-S-Calix followed Langmuir isotherm models and pseudo-second-order kinetic, with a maximum removal efficiency of (92.8%) and adsorption capacity of 114 mg g(-1) within only 1.5 min at pH 8 and room temperature. The presented B-S-Calix may serve as good candidates for emergent wastewater applications.
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页数：9
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