Thermo-responsive ion imprinted polymer on the surface of magnetic carbon microspheres for identification and removal of low-concentrations of Cu2+
Weifeng Liu
A B , Lei Qin A B , Zhuolin An A C , Lin Chen A B , Xuguang Liu A D E , Yongzhen Yang A B E and Bingshe Xu A B
+ Author Affiliations
- Author Affiliations
A Key Laboratory of Interface Science and Engineering in Advanced Materials (Taiyuan University of Technology), Ministry of Education, Taiyuan 030024, China.
B Research Center on Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China.
C College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
D College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
E Corresponding author. Email: liuxuguang@tyut.edu.cn; yyztyut@126.com
Environmental Chemistry 15(5) 306-316 https://doi.org/10.1071/EN18046
Submitted: 28 February 2018 Accepted: 14 May 2018 Published: 26 July 2018
Environmental context. Because of the multiple industrial applications of metals, contamination by metal ions is widespread and can at times endanger the environment and the health of human beings. We prepared ion-imprinted adsorbents to achieve selective recognition and smart separation of low-concentrations of copper ions from water. These smart imprinted materials have high potential for selective adsorption and removal of contaminant copper ions, particularly at very low concentrations.
Abstract. A temperature-responsive magnetic adsorbent (poly(N-propyl acrylamide) grafted magnetic carbon microspheres, Cu2+-IIP) was synthesised by ion imprinting technology for low concentration Cu2+ removal. Cu2+-IIP was prepared by using N-propyl acrylamide as a thermo-sensitive functional monomer, N,N-methylene-bis-acrylamide as a cross-linker and ammonium persulfate as an initiator. The morphologies and microstructures of samples were characterised by transmission electron microscopy, Fourier transform infrared spectrometry, thermogravimetry and vibrating sample magnetometry. Adsorption experiments were conducted in terms of kinetics, isotherms and selective recognition adsorption at low feed concentrations. Results indicate that Cu2+-IIP possesses good recognition selectivity and affinity for Cu2+, and can be separated from the treated solution quickly by applying an external magnetic field. The adsorption capacity towards Cu2+ depends on temperature and reaches a maximum value of 45.46 mg g−1 at 35 °C, higher than that of the non-imprinted polymer. The adsorption behaviour of Cu2+ on Cu2+-IIP can be well defined with both the pseudo-second-order kinetic model and Langmuir isotherm model. Cu2+-IIP performs good adsorption selectivity towards Cu2+ because the relative selectivity factors of Cu2+ with respect to Ni2+, Zn2+ and Cd2+ are 7.14, 7.60 and 6.77, respectively. The adsorption capacity of Cu2+-IIP remained 88.41 % after five cycles.
Additional keywords: adsorption, heavy metal ion, imprinting technique, magnetic separation.
References
Azizi N, Abbasi F, Abdoli-Senejani M (2017). Thiamine immobilized on silane-functionalized magnetic nanoparticles for catalytic synthesis of 2,3-dihydroquinzaolin-4(1H)-ones in water. Materials Chemistry and Physics 196, 118–125.| Thiamine immobilized on silane-functionalized magnetic nanoparticles for catalytic synthesis of 2,3-dihydroquinzaolin-4(1H)-ones in waterCrossref | GoogleScholarGoogle Scholar |
Barton J, Gonzalez Garcia MB, Hernandez Santos D, Fanjul-Bolado P, Ribotti A, McCaul M, Diamond D, Magni P (2016). Screen-printed electrodes for environmental monitoring of heavy metal ions: a review. Microchimica Acta 183, 503–517.
| Screen-printed electrodes for environmental monitoring of heavy metal ions: a reviewCrossref | GoogleScholarGoogle Scholar |
Besharati-Seidani A, Shamsipur M (2015). Ion-imprinted polymeric nanoparticles for fast and selective separation of lanthanum(III). Microchimica Acta 182, 1747–1755.
| Ion-imprinted polymeric nanoparticles for fast and selective separation of lanthanum(III)Crossref | GoogleScholarGoogle Scholar |
Bilal M, Shah JA, Ashfaq T, Gardazi SMH, Tahir AA, Pervez A, Haroon H, Mahmood Q (2013). Waste biomass adsorbents for copper removal from industrial wastewater- A review. Journal of Hazardous Materials 263, 322–333.
| Waste biomass adsorbents for copper removal from industrial wastewater- A reviewCrossref | GoogleScholarGoogle Scholar |
Cai YL, Zheng LC, Fang ZQ (2015). Selective adsorption of Cu(II) from an aqueous solution by ion imprinted magnetic chitosan microspheres prepared from steel pickling waste liquor. RSC Advances 5, 97435–97445.
| Selective adsorption of Cu(II) from an aqueous solution by ion imprinted magnetic chitosan microspheres prepared from steel pickling waste liquorCrossref | GoogleScholarGoogle Scholar |
Chen LX, Xu SF, Li JH (2011). Recent advances in molecular imprinting technology: current status, challenges and highlighted applications. Chemical Society Reviews 40, 2922–2942.
| Recent advances in molecular imprinting technology: current status, challenges and highlighted applicationsCrossref | GoogleScholarGoogle Scholar |
Chen L, Li LF, Zhang H, Liu WF, Yang YZ, Liu XG, Xu BS (2014). Magnetic thermosensitive core/shell microspheres: synthesis, characterization and performance in hyperhtermia and drug delivery. RSC Advances 4, 46806–46812.
| Magnetic thermosensitive core/shell microspheres: synthesis, characterization and performance in hyperhtermia and drug deliveryCrossref | GoogleScholarGoogle Scholar |
Didehban KH, Mohammadi L, Azimvand J (2017). Preparation of RGO/Fe3O4/poly (acrylic acid) hydrogel nanocomposites with improved magnetic, thermal and electrochemical properties. Materials Chemistry and Physics 195, 162–169.
| Preparation of RGO/Fe3O4/poly (acrylic acid) hydrogel nanocomposites with improved magnetic, thermal and electrochemical propertiesCrossref | GoogleScholarGoogle Scholar |
Dolak I, Kecili R, Hur D, Ersoz A, Say R (2015). Ion-imprinted polymers for selective recognition of neodymium(III) in environmental samples. Industrial & Engineering Chemistry Research 54, 5328–5335.
| Ion-imprinted polymers for selective recognition of neodymium(III) in environmental samplesCrossref | GoogleScholarGoogle Scholar |
Du X, Zhang H, Hao XG, Guan GQ, Abudula A (2014). Facile preparation of ion-imprinted composite film for selective electrochemical removal of nickel(II) ions. ACS Applied Materials & Interfaces 6, 9543–9549.
| Facile preparation of ion-imprinted composite film for selective electrochemical removal of nickel(II) ionsCrossref | GoogleScholarGoogle Scholar |
Fang T, Yang XM, Zhang LZ, Gong JM (2016). Ultrasensitive photoelectrochemical determination of chromium(VI) in water samples by ion-imprinted/formate anion-incorporated graphitic carbon nitride nanostructered hybrid. Journal of Hazardous Materials 312, 106–113.
| Ultrasensitive photoelectrochemical determination of chromium(VI) in water samples by ion-imprinted/formate anion-incorporated graphitic carbon nitride nanostructered hybridCrossref | GoogleScholarGoogle Scholar |
Feng T, Wang J, Zhang F, Shi XW (2013). Removal of copper(II) from an aqueous solution with copper(II)-imprinted chitosan microspheres. Journal of Applied Polymer Science 128, 3631–3638.
| Removal of copper(II) from an aqueous solution with copper(II)-imprinted chitosan microspheresCrossref | GoogleScholarGoogle Scholar |
Fu FL, Wang Q (2011). Removal of heavy metal ions from wastewaters: a review. Journal of Environmental Management 92, 407–418.
| Removal of heavy metal ions from wastewaters: a reviewCrossref | GoogleScholarGoogle Scholar |
Fu JQ, Chen LX, Li JH, Zhang Z (2015). Current status and challenges of ion imprinting. Journal of Materials Chemistry. A, Materials for Energy and Sustainability 3, 13598–13627.
| Current status and challenges of ion imprintingCrossref | GoogleScholarGoogle Scholar |
Gao BJ, Wang XH, Zhang YY (2013). Preparation of chromate anion surface-imprinted material IIP-PVI/SiO2 based on polyvinylimidazole-grafted particles PVI/SiO2 and its ionic recognition characteristic. Materials Chemistry and Physics 140, 478–486.
| Preparation of chromate anion surface-imprinted material IIP-PVI/SiO2 based on polyvinylimidazole-grafted particles PVI/SiO2 and its ionic recognition characteristicCrossref | GoogleScholarGoogle Scholar |
Ge HC, Hua TT, Chen XD (2016). Selective adsorption of lead on grafted and crosslinked chitosan nanoparticlaes prepared by using Pd2+ as template. Journal of Hazardous Materials 308, 225–232.
| Selective adsorption of lead on grafted and crosslinked chitosan nanoparticlaes prepared by using Pd2+ as templateCrossref | GoogleScholarGoogle Scholar |
Guo H, Yuan DY, Fu GQ (2015). Enhanced surface imprinting of lysozyme over a new kind of magnetic chitosan submicrospheres. Journal of Colloid and Interface Science 440, 53–59.
| Enhanced surface imprinting of lysozyme over a new kind of magnetic chitosan submicrospheresCrossref | GoogleScholarGoogle Scholar |
Guo YM, Li H, Shi WK, Zhang J, Feng J, Yang XL, Wang K, Zhang H, Yang L (2017). Targeted delivery and Ph-responsive release of doxorubicin to cancer cells using calcium carbonate/hyaluronate/glutamate mesoporous hollow spheres. Journal of Colloid and Interface Science 502, 59–66.
| Targeted delivery and Ph-responsive release of doxorubicin to cancer cells using calcium carbonate/hyaluronate/glutamate mesoporous hollow spheresCrossref | GoogleScholarGoogle Scholar |
He JS, Chen JP (2014). Cu(II)-imprinted poly(vinyl alcohol)/poly(acrylic acid) membrane for greater enhancement in sequestration of copper ion in the presence of competitive heavy metal ions: Material development, process demonstration, and study of mechanisms. Industrial & Engineering Chemistry Research 53, 20223–20233.
| Cu(II)-imprinted poly(vinyl alcohol)/poly(acrylic acid) membrane for greater enhancement in sequestration of copper ion in the presence of competitive heavy metal ions: Material development, process demonstration, and study of mechanismsCrossref | GoogleScholarGoogle Scholar |
Hoai NT, Yoo DK, Kim D (2010). Batch and column separation characteristics of copper-imprinted porous polymer micro-beads synthesized by a direct imprinting method. Journal of Hazardous Materials 173, 462–467.
| Batch and column separation characteristics of copper-imprinted porous polymer micro-beads synthesized by a direct imprinting methodCrossref | GoogleScholarGoogle Scholar |
Hua M, Jiang YN, Wu B, Pan BC, Zhao X, Zhang QX (2013). Fabrication of a new hydrous Zr(IV) oxide-based nanocomposite for enhanced Pb(II) and Cd(II) removal from waters. ACS Applied Materials & Interfaces 5, 12135–12142.
| Fabrication of a new hydrous Zr(IV) oxide-based nanocomposite for enhanced Pb(II) and Cd(II) removal from watersCrossref | GoogleScholarGoogle Scholar |
Kempe H, Parareda Pujolràs A, Kempe M (2015). Molecularly imprinted polymer nanocarriers for sustained release of erythromycin. Pharmaceutical Research 32, 375–388.
| Molecularly imprinted polymer nanocarriers for sustained release of erythromycinCrossref | GoogleScholarGoogle Scholar |
Khoddami N, Shemirani F (2016). A new magnetic ion-imprinted polymer as a highly selective sorbent for determination of cobalt in biological and environmental samples. Talanta 146, 244–252.
| A new magnetic ion-imprinted polymer as a highly selective sorbent for determination of cobalt in biological and environmental samplesCrossref | GoogleScholarGoogle Scholar |
Li SJ, Ge Y, Turner APF (2011). A catalytic and positively thermosensitive moleculalry imprinted polymer. Advanced Functional Materials 21, 1194–1200.
| A catalytic and positively thermosensitive moleculalry imprinted polymerCrossref | GoogleScholarGoogle Scholar |
Li XJ, Zhang BL, Li W, Lei XF, Fan XL, Tian L, Zhang HP, Zhang QY (2014). Preparation and characterization of bovine serum albumin surface-imprinted thermosensitive magnetic polymer microsphere and its applicaiton for protein recognition. Biosensors & Bioelectronics 51, 261–267.
| Preparation and characterization of bovine serum albumin surface-imprinted thermosensitive magnetic polymer microsphere and its applicaiton for protein recognitionCrossref | GoogleScholarGoogle Scholar |
Li DY, Zhang XM, Yan YJ, He XW, Li WY, Zhang YK (2016a). Thermo-sensitive imprinted polymer embedded carbon dots using epitope approach. Biosensors & Bioelectronics 79, 187–192.
| Thermo-sensitive imprinted polymer embedded carbon dots using epitope approachCrossref | GoogleScholarGoogle Scholar |
Li LF, Chen L, Zhang H, Yang YZ, Liu XG, Chen YK (2016b). Temperature and magnetism bi-responsive molecularly imprinted polymers: Preparation, adsorption mechanism and properties as drug delivery system for sustained release of 5-fluorouracil. Materials Science and Engineering C 61, 158–168.
| Temperature and magnetism bi-responsive molecularly imprinted polymers: Preparation, adsorption mechanism and properties as drug delivery system for sustained release of 5-fluorouracilCrossref | GoogleScholarGoogle Scholar |
Liu WF, Qin L, Yang YZ, Liu XG, Xu BS (2014a). Synthesis and characterization of dibenzothiophene imprinted polymers on the surface of iniferter-modified carbon microspheres. Materials Chemistry and Physics 148, 605–613.
| Synthesis and characterization of dibenzothiophene imprinted polymers on the surface of iniferter-modified carbon microspheresCrossref | GoogleScholarGoogle Scholar |
Liu WF, Liu XG, Yang YZ, Zhang Y, Xu BS (2014b). Selective removal of benzothiophene and dibenzothiophene from gasoline using double-template molecularly imprinted polymers on the surface of carbon microspheres. Fuel 117, 184–190.
| Selective removal of benzothiophene and dibenzothiophene from gasoline using double-template molecularly imprinted polymers on the surface of carbon microspheresCrossref | GoogleScholarGoogle Scholar |
Liu MM, Pi JY, Wang XJ, Huang R, Du YM, Yu XY, Tan WF, Liu F, Shea KJ (2016a). A sol-gel derived pH-responsive bovine serum albumin molecularly imprinted poly(ionic liquids) on the surface of multiwall carbon nanotubes. Analytica Chimica Acta 932, 29–40.
| A sol-gel derived pH-responsive bovine serum albumin molecularly imprinted poly(ionic liquids) on the surface of multiwall carbon nanotubesCrossref | GoogleScholarGoogle Scholar |
Liu WF, Qin L, Shi WP, Chen L, Yang YZ, Liu XG, Xu BS (2016b). Molecularly imprinted polymers on the surface of porous carbon microspheres for capturing dibenzothiophene. Microchimica Acta 183, 1153–1160.
| Molecularly imprinted polymers on the surface of porous carbon microspheres for capturing dibenzothiopheneCrossref | GoogleScholarGoogle Scholar |
Luo XB, Luo SL, Zhan YC, Shu HY, Huang YN, Tu XM (2011). Novel Cu(II) magnetic ion imprinted materials prepared by surface imprinted technique combined with a sol-gel process. Journal of Hazardous Materials 192, 949–955.
| Novel Cu(II) magnetic ion imprinted materials prepared by surface imprinted technique combined with a sol-gel processCrossref | GoogleScholarGoogle Scholar |
Machida M, Fotoohi B, Amamo Y, Ohba T, Kanoh H, Mercier L (2012). Cadmium(II) adsorption using functional mesoporous silica and activated carbon. Journal of Hazardous Materials 221–222, 220–227.
| Cadmium(II) adsorption using functional mesoporous silica and activated carbonCrossref | GoogleScholarGoogle Scholar |
Mushtaq M, Bhatti HN, Iqbal M, Noreen S (2016). Eriobotrya japonica seed biocomposite efficiency for copper adsorption: Isotherms, kinetics, thermodynamic and desorption studies. Journal of Environmental Management 176, 21–33.
| Eriobotrya japonica seed biocomposite efficiency for copper adsorption: Isotherms, kinetics, thermodynamic and desorption studiesCrossref | GoogleScholarGoogle Scholar |
Pan JM, Hang H, Dai XH, Dai JD, Huo PW, Yan YS (2012a). Switched recognition and release ability of temperature responsive molecularly imprinted polymers based on magnetic halloysite nanotubes. Journal of Materials Chemistry 22, 17167–17175.
| Switched recognition and release ability of temperature responsive molecularly imprinted polymers based on magnetic halloysite nanotubesCrossref | GoogleScholarGoogle Scholar |
Pan JM, Wang B, Dai JD, Dai XH, Hang H, Ou HX, Yan YS (2012b). Selective recognition of 2,4,5-trichlorophenol by temperature responsive and magnetic molecularly imprinted polymers based on halloysite nanotuves. Journal of Materials Chemistry 22, 3360–3369.
| Selective recognition of 2,4,5-trichlorophenol by temperature responsive and magnetic molecularly imprinted polymers based on halloysite nanotuvesCrossref | GoogleScholarGoogle Scholar |
Pan GQ, Guo QP, Cao CB, Yang HL, Li B (2013). Thermo-responsive molecularly imprinted nanogels for specific recognition and controlled release of proteins. Soft Matter 9, 3840–3850.
| Thermo-responsive molecularly imprinted nanogels for specific recognition and controlled release of proteinsCrossref | GoogleScholarGoogle Scholar |
Park CM, Chu KH, Heo J, Her N, Jang M, Son A, Yoon Y (2016). Environmental behavior of engineered nanomaterials in porous media: a review. Journal of Hazardous Materials 309, 133–150.
| Environmental behavior of engineered nanomaterials in porous media: a reviewCrossref | GoogleScholarGoogle Scholar |
Peng W, Xie ZZ, Cheng G, Shi L, Zhang YB (2015). Amino-functionalized adsorbent prepared by means of Cu(II) imprinted method and its selective removal of copper from aqueous solutions. Journal of Hazardous Materials 294, 9–16.
| Amino-functionalized adsorbent prepared by means of Cu(II) imprinted method and its selective removal of copper from aqueous solutionsCrossref | GoogleScholarGoogle Scholar |
Popuri SR, Vijaya Y, Boddu VM, Abburi K (2009). Adsorptive removal of copper and nickel ions from water using chitosan cated PVC beads. Bioresource Technology 100, 194–199.
| Adsorptive removal of copper and nickel ions from water using chitosan cated PVC beadsCrossref | GoogleScholarGoogle Scholar |
Ronda A, Della Zassa M, Martin-Lara MA, Calero M, Canu P (2016). Combustion of a Pb(II)-loaded olive tree pruning used as biosorbent. Journal of Hazardous Materials 308, 285–293.
| Combustion of a Pb(II)-loaded olive tree pruning used as biosorbentCrossref | GoogleScholarGoogle Scholar |
Shi WP, Liu WF, Chen L, Qin L, Yang YZ, Liu XG (2015). Effect of annealing temperature on the structure of carbon encapsulated Fe3O4 nanospheres. RSC Advances 5, 106787–106794.
| Effect of annealing temperature on the structure of carbon encapsulated Fe3O4 nanospheresCrossref | GoogleScholarGoogle Scholar |
Sun CM, Zhang CF, Li CX, Kuang YZ, Qu RJ, Ji CN (2015). Syntheses of polyamine-bridged polysilsesquioxanes hybrid materials combining sol-gel processing and molecular imprinting applied to selective adsorption for copper. Materials Chemistry and Physics 153, 307–315.
| Syntheses of polyamine-bridged polysilsesquioxanes hybrid materials combining sol-gel processing and molecular imprinting applied to selective adsorption for copperCrossref | GoogleScholarGoogle Scholar |
Tabakli B, Topcu AA, Doker S, Uzun L (2015). Particle-assisted ion-imprinted cryogels for selective CdII ion removal. Industrial & Engineering Chemistry Research 54, 1816–1823.
| Particle-assisted ion-imprinted cryogels for selective CdII ion removalCrossref | GoogleScholarGoogle Scholar |
Taghizadeh M, Asgharinezhad AA, Samkhaniany N, Tadjarodi A, Abbaszadeh A, Pooladi M (2014). Solid phase extraction of heavy metal ions based on a novel functionalized magnetic multi-walled carbon nanotube composite with the aid of experimental design methodology. Microchimica Acta 181, 597–605.
| Solid phase extraction of heavy metal ions based on a novel functionalized magnetic multi-walled carbon nanotube composite with the aid of experimental design methodologyCrossref | GoogleScholarGoogle Scholar |
Wang JJ, Li ZK (2015). Enhanced selective removal of Cu(II) from aqueous solution by novel polyethylenimine-functionalized ion imprinted hydrogel: Behaviors and mechanisms. Journal of Hazardous Materials 300, 18–28.
| Enhanced selective removal of Cu(II) from aqueous solution by novel polyethylenimine-functionalized ion imprinted hydrogel: Behaviors and mechanismsCrossref | GoogleScholarGoogle Scholar |
Wójcik G, Neagu V, Bunia I (2011). Sorption studies of chromium(VI) onto new ion exchanger with tertiary amine, quaternary ammonium and ketone groups. Journal of Hazardous Materials 190, 544–552.
| Sorption studies of chromium(VI) onto new ion exchanger with tertiary amine, quaternary ammonium and ketone groupsCrossref | GoogleScholarGoogle Scholar |
Xi Y, Luo YT, Luo JM, Luo XB (2015). Removal of Cadmium(II) from wastewater using novel Cadmium ion-imprinted polymers. Journal of Chemical & Engineering Data 60, 3253–3261.
| Removal of Cadmium(II) from wastewater using novel Cadmium ion-imprinted polymersCrossref | GoogleScholarGoogle Scholar |
Xu CG, Shen XT, Ye L (2012). Molecularly imprinted magnetic materials prepared from modular and clickable nanoparticles. Journal of Materials Chemistry 22, 7427–7433.
| Molecularly imprinted magnetic materials prepared from modular and clickable nanoparticlesCrossref | GoogleScholarGoogle Scholar |
Xu SY, Guo CJ, Li YX, Yu ZR, Wei CH, Tang YW (2014). Methyl parathion imprinted polymer nanoshell coated on the magnetic nanocore for selective reconition and fast adsorption and separation in soils. Journal of Hazardous Materials 264, 34–41.
| Methyl parathion imprinted polymer nanoshell coated on the magnetic nanocore for selective reconition and fast adsorption and separation in soilsCrossref | GoogleScholarGoogle Scholar |
You QP, Zhang YP, Zhang QW, Guo JF, Huang WH, Shi SY, Chen XQ (2014). High-capacity thermo-responsive magnetic molecularly imprinted polymers for selective extraction of curcuminoids. Journal of Chromatography. A 1354, 1–8.
| High-capacity thermo-responsive magnetic molecularly imprinted polymers for selective extraction of curcuminoidsCrossref | GoogleScholarGoogle Scholar |
Zhang LJ, Cao LQ, Wang XH, Wang JD (2012). Preparation of the thermosensitive metal ion imprinted polymer in supercritical carbon dioxide: application in the selective recognition of copper(II). Polymers for Advanced Technologies 23, 1174–1180.
| Preparation of the thermosensitive metal ion imprinted polymer in supercritical carbon dioxide: application in the selective recognition of copper(II)Crossref | GoogleScholarGoogle Scholar |
Zhang TL, Yue XD, Zhang KR, Li JH, Zhu CY, Zhang L, Chen W (2016a). Selective adsorption of CuSO4 from mixed sulfate solutions by Cu(II) ion-imprinted polymers containing salicylaldoximes, ammonium cations, and tertiary amino groups. Materials & Design 107, 372–377.
| Selective adsorption of CuSO4 from mixed sulfate solutions by Cu(II) ion-imprinted polymers containing salicylaldoximes, ammonium cations, and tertiary amino groupsCrossref | GoogleScholarGoogle Scholar |
Zhang N, Zang GL, Shi C, Yu HQ, Sheng GP (2016b). A novel adsorbent TEMPO-mediated oxidized cellulose nanofibrils modified with PEI: preparation, characterization, and application for Cu(II) removal. Journal of Hazardous Materials 316, 11–18.
| A novel adsorbent TEMPO-mediated oxidized cellulose nanofibrils modified with PEI: preparation, characterization, and application for Cu(II) removalCrossref | GoogleScholarGoogle Scholar |
Zhong XW, Deng F, Wang YH, Luo XB (2013). A molecularly imprinted polymer for solid phase extraction of allantoin. Microchimica Acta 180, 1453–1460.
| A molecularly imprinted polymer for solid phase extraction of allantoinCrossref | GoogleScholarGoogle Scholar |
Zhu Y, Bai ZH, Luo WQ, Wang BJ, Zhai LL (2017). A facile ion imprinted synthesis of selective biosorbent for Cu2+ via microfluidic technology. Journal of Chemical Technology and Biotechnology (Oxford, Oxfordshire) 92, 2009–2022.
| A facile ion imprinted synthesis of selective biosorbent for Cu2+ via microfluidic technologyCrossref | GoogleScholarGoogle Scholar |
