Vol.37 No Journal of South-Central University for Nationalities Nat.Sci.Edition Mar.2018

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1 37 1 Vol37 No Journal of South-Central University for NationalitiesNatSciEdition Mar Cu N Cu 2+ Fe 3 O 4 10 mg ph 5 10 ml Cu mg L min 93% Cu 2+ EDTA 01 mol L min 95%Cu 2+ - O6255 A Enrichment of Cu 2+ by Magnetic Polystyrene-Benzyl Iminodiacetic Acid Composites Zhang Huijuan 1 Liu Wangwei 1 Lü Haoyong 1 Liu Huiling College of Chemistry and Materials ScienceSouth-Central University for NationalitiesWuhan Experimental Teaching and Laboratory Management CenterSouth-Central University for Nationalities Wuhan Abstract In order to prepare new materials for the rapid separation and enrichment of trace Cu 2+ in watermagnetic polystyrene-benzyl iminodiacetic acid composites was prepared by thermal polymerization using magnetic silica microsphere as the coren-4-vinyl-benzyl iminodiacetic acid as monomerand divinyl benzene as cross-linker respectively The composition and structure of the resulting materials were characterized by Fourier infrared spectroscopytransmission electron microscopy and thermogravimetric analysis Cu 2+ was used to study the enrichment performance and related adsorption kinetics The result showed that the polymer with functional groups was successfully coated on the surface of Fe 3 O 4 nanoparticles Adsorption equilibrium was achieved within 15 min with an adsorption rate of 93% by using 10 mg adsorbent in 10 ml Cu 2+ solution 25 mg L -1 at a ph value of 50 Cu 2+ could be quickly eluted using EDTA solution 01 mol L -1 within 15 minwith elution rate of up to 95% The adsorption behavior of Cu 2+ on the prepared material fitted well with the pseudo two-order kinetics model Keywords polystyrene-benzyl iminodiacetic acidmagnetic materialcopper ionsabsorption huistar119@ 163com CX201601

2 ml 25 ml DVB 096 ml mpeg2000m = 21 5 min MPS mg MPS Fe 3 O SiO 2 - h h MPS N-4- - VBIDA mpeg2000m = 21 - Fe 3 O SiO PS-BIDA TEM FT-IR TG Cu 2+ 1 Fe 3 O SiO PS-BIDA - Fig1 Synthetic schematicdaiageam of Fe 3 O SiO PS-BIDA 123 Cu ml 10 ml ph mg L -1 Cu AIBN IDA γ VBC DVB EDTA KOH HCl 30 mg AIBN MPS Cu 2+ q t Fe 3 O 4 q t = Vρ - 0 ρ t 1 TEOS PEG m V Cu 2+ mlm mgρ 0 ρ t t Cu 2+ mg L -1 η η = m t 100% m e NEXUS 470 m t Cu 2+ m e Thermo Nicolet TG-209F3 Cu NETZSCH AA JEM-100CX II Cu 2+ Cu 2+ Jeol 325 nm 2 ma 5 mm L min L min VBIDA 0959 g IDA 50 ml02 mol L -1 nm mg L -1 Cu 2+ KOH 60 Cu 2+ Cu μl VBC 10 ml1 A = ρ mol L -1 KOH 30 min R VBC 24 h Cu 2+ Cu h 125 Cu ml 1 10 g VBIDA 2 ml V V = min 2

3 1 - Cu A DR DR = m m 0 100% 3 m Cu 2+ m 0 Cu Fe 3 O SiO 2 MPS Fe 3 O SiO PS-BIDA 2 2 Fe 3 O SiO 2 MPS 3443 cm -1 OH 1083 cm -1 Si O 1710 cm -1 C ==O 590 cm -1 Fe O 30~120 nm Fe 3 O SiO PS-BIDA Fe 3 O cm -1 Fe 3 O cm -1 VBIDA OH cm cm -1 C N Fig3 3 Fe 3 O SiO PS-BIDA TGDTG curves of Fe 3 O SiO PS-BIDA 213 TEM Fig4 Fe 3 O SiO PS-BIDA TEM image offe 3 O SiO PS-BIDA Cu 2+ 5 afe 3 O SiO 2 MPSbFe 3 O SiO PS-BIDA Fig2 2 FTIR spectra of magnetic polymer materials ~ ml ph 5 Cu mg L -1 Cu % Cu Cu 2+ Fig5 Effect of adsorbent amount on adsorption of Cu 2+

4 28 37 mg Cu 2+ 93% Cu 2+ Cu 2+ Cu mg 222 ph 7b Cu mg L -1 ph 30 ~ 90 ph Cu 2+ Cu mg ph Cu 2+ 80% ph 40 ~ 60 ph Cu 2+ ph OH Cu 2+ Cu 2+ Cu 2+ ph = 50 ph 6 ph Cu 2+ Fig6 Effect of ph value on adsorption of Cu 2+ Cu 2+ Fig7 a b 223 Cu 2+ min -1 g /mg min 10 mg Cu ml ln( q e - q t ) t Cu 2+ 1 mg L -1 Cu 2+ Cu mincu 2+ 7a Tab1 1 7 Cu 2+ Effect of initial Cu 2+ concentration on material adsorption capacity 224 ln( q e - q t ) = ln q e - k 1 t 1 = + t q t k 2 q 2 q e e q e q t t mincu 2+ mg g -1 k 1 k 2 Cu 2+ Adsorption kinetic of Cu 2+ onto Fe 3 O SiO PS-BIDA materials ρ 0 /mg L -1 k 1 / min -1 R 2 1 k 2 / g mg min -1 R Cu Cu 2+ 珋 x±sn = 3 mg L -1 Cu 2+ Tab2 Effect of coexisting ions on Cu 2 + adsorption Cu 2+ ρ/mg L Cu 2+ Zn 2+ Mn 2+ 4 Cu 2+ ηcu 2+ /% Na ±05 K ±05 Ca ±16 Mg ±16 Mn ±02 Zn ±01

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