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Removal of Zn2+ from polyethylene terephthalate (PET) glycolytic monomers by sulfonic acid cation exchange resin
Zhang, Qi1,2,3; Huang, Rong1,2,3; Yao, Haoyu1,2,3; Lu, Xingmei1,2,3,4; Yan, Dongxia1,2,3; Xin, Jiayu1,2,3,4
2021-08-01
Source PublicationJOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
Volume9Issue:4Pages:12
AbstractGlycolysis of polyethylene terephthalate (PET) has always been a research hotspot in PET waste recovery due to its high efficiency and sustainability. Zinc acetate (ZnAc2 center dot 2H(2)O) and urea/(ZnAc2 center dot 2H(2)O) are usually regarded as the most promising catalysts for the glycolysis of PET, while the residue of Zn2+ in glycolytic monomers (bis (hydroxyalkyl) terephthalate (BHET)) was identified as a big hassle, which caused the detrimental effect on the chromaticity of down-stream product. However, the removal of Zn2+ from BHET has almost not been reported previously. In the present work, ion exchange was adopted as effective measure to eliminate trace Zn2+ from BHET and more than 99% of Zn2+ can be removed by 001*7 sulfonic acid resin with resin dosage of 1.6 g/L at 298.15 K, 160 rpm for 120 min. Additionally, based on prevailing adsorption kinetics, isotherms, thermodynamic models and various precise instruments, comprehensive adsorption mechanism were exploited. Pseudo-second-order model (R-2 > 0.999) and Langmuir model (R-2 > 0.999) were found to match well with the experimental data, indicating the sorption of Zn2+ on 001*7 was homogeneous monomolecular layer adsorption and dominated by chemisorption. The thermodynamic model revealed the sorption was thermodynamically spontaneous. Fourier-Transform Infrared Spectroscopy (FTIR) illuminated the sulfonic acid groups on 001*7 resin were the main binding sites for Zn2+. X-ray Photoelectron Spectroscopy (XPS) elucidated ion exchange and electrostatic interaction between the sulfonic acid groups and Zn2+ were responsible for the sorption of Zn2+. All the results obtained can prove 001*7 sulfonic acid resin is an efficient material for removal of Zn2+ from BHET.
KeywordGlycolytic Monomers Trace metal impurity Product purification Ion exchange Bis(hydroxyalkyl) terephthalate
DOI10.1016/j.jece.2021.105326
Language英语
WOS KeywordHEAVY-METALS ; ADSORPTION ; EFFICIENT ; KINETICS ; ZN(II) ; ADSORBENT ; MEMBRANE ; CATALYST ; SURFACE ; PB(II)
Funding ProjectNational Key Research and Development Program of China[2019YFC1908204] ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences[IAGM-2019-A06] ; National Natural Science Foundation of China[21878314] ; National Natural Science Foundation of China[21908232] ; National Natural Science Foundation of China[21878292] ; National Natural Science Foundation of China[21776289]
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding OrganizationNational Key Research and Development Program of China ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences ; National Natural Science Foundation of China
WOS IDWOS:000670342000007
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/49368
Collection中国科学院过程工程研究所
Corresponding AuthorLu, Xingmei; Xin, Jiayu
Affiliation1.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Beijing Key Lab Ion Liquids Clean Proc, CAS Key Lab Green Proc & Engn,Inst Proc Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, Innovat Acad Green Manufacture, Beijing 100190, Peoples R China
4.Univ Chinese Acad Sci, Sino Danish Coll, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Qi,Huang, Rong,Yao, Haoyu,et al. Removal of Zn2+ from polyethylene terephthalate (PET) glycolytic monomers by sulfonic acid cation exchange resin[J]. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,2021,9(4):12.
APA Zhang, Qi,Huang, Rong,Yao, Haoyu,Lu, Xingmei,Yan, Dongxia,&Xin, Jiayu.(2021).Removal of Zn2+ from polyethylene terephthalate (PET) glycolytic monomers by sulfonic acid cation exchange resin.JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,9(4),12.
MLA Zhang, Qi,et al."Removal of Zn2+ from polyethylene terephthalate (PET) glycolytic monomers by sulfonic acid cation exchange resin".JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 9.4(2021):12.
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