Heavy metal decontamination by ion exchange polymers for water purification: counterintuitive cation removal by an anion exchange polymer

被引:15
作者
Sgreccia, Emanuela [1 ]
Rogalska, Celina [1 ,2 ]
Gallardo Gonzalez, Francia Sarhaly [1 ]
Prosposito, Paolo [1 ]
Burratti, Luca [3 ]
Knauth, Philippe [4 ,5 ]
Di Vona, Maria Luisa [1 ]
机构
[1] Univ Roma Tor Vergata, Dept Ind Engn, I-00133 Rome, Italy
[2] Wroclaw Univ Sci & Technol, Fac Chem, Norwida 4-6, PL-50373 Wroclaw, Poland
[3] Roma Tre Univ Rome, Dept Sci, Via Vasca Navale 79, I-00146 Rome, Italy
[4] Aix Marseille Univ, CNRS, MADIREL UMR 7246, Campus St Jerome, F-13013 Marseille, France
[5] Int Lab Ionomer Mat Energy, Campus St Jerome, F-13013 Marseille, France
关键词
POLY(ETHER ETHER KETONE); CONDUCTING IONOMERS; MEMBRANES; PROTON; TRANSPORT; STABILITY; HYDRATION; AMINE;
D O I
10.1007/s10853-024-09356-3
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Ion exchange polymers were used for mercury and lead ions removal in water. The heavy metal ion concentration was analyzed by two independent methods: inductively coupled plasma-optical emission spectroscopy (ICP-OES) and gravimetry. The studied cation exchange polymer (CEP) was sulfonated poly(ether ether ketone) (SPEEK), and the anion exchange polymer (AEP) was poly(sulfone trimethylammonium) chloride (PSU-TMA). The removal capacity was connected with the ion exchange capacity (IEC) equal to 1.6 meq/g for both polymers. The concentration ranges were 0.15-0.006 mM for Hg2+ and 10.8-1.0 mM for Pb2+. SPEEK achieved 100% removal efficiency for mercury and lead if the concentration was below the maximum sorption capacity (Qmax), which was about 210 mg/g for Pb2+ with SPEEK. For PSU-TMA, the surprising removal efficiency of 100% for Hg2+, which seemed incompatible with ion exchange, was related to the formation of very stable complex anions that can be sorbed by an AEP. Langmuir adsorption theory was applied for the thermodynamic description of lead removal by SPEEK. A second-order law was effective to describe the kinetics of the process.
引用
收藏
页码:2776 / 2787
页数:12
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