Abstract：The graphene oxide prepared by modified hummers method was used as carrier to prepare magnetic graphene oxide by coprecipitation method. Then the amino-functionalized magnetic graphene oxide (EDA-MGO) was prepared via ethanediamine modification. The functional groups, surface morphology and structure composition of EDA-MGO were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM) and X-ray diffractometer (XRD). The magnetic separation and recovery properties of EDA-MGO were analyzed. Moreover, the adsorption property of EDA-MGO to methylene blue was also discussed. The results showed that the cubic-phase nano magnetic Fe3O4 was uniformly loaded onto the surface of graphene oxide. The amino-functionalization was successful. The prepared EDA-MGO exhibited good magnetic separation and recovery properties. The adsorption rate and adsorption capacity of EDA-MGO to methylene blue was 97.56% and 139.37mg/g at room temperature, respectively, under the following conditions: the initial mass concentration of methylene blue was 100mg/L; the volume was 100mL; the adsorbent mass was 0.07g; the pH was 7; the adsorption time was 150min. The adsorption process conformed to the pseudo-second order dynamic model and Langmuir isothermal adsorption model. The adsorbing capacity of adsorbent was still 108.33mg/g after recycle for 6 times, indicating that EDA-MGO had good performance in regeneration cycle.
Chen P,Cao Z F,Wang S,et al.In situ nano-silicate functionalized magnetic composites by (poly)dopamine to improve MB removal[J].Colloids & Surfaces A Physicochemical & Engineering Aspects,2018,552:89-97.
[2]
Yang Z,Li M,Yu M,et al.A novel approach for methylene blue removal by calcium dodecyl sulfate enhanced precipitation and microbial flocculant GA1 flocculation[J].Chemical Engineering Journal,2016,303:1-13.
[3]
Pakdel E,Daoud W A,Seyedin S,et al.Tunable photocatalytic selectivity of TiO2/SiO2,nanocomposites:effect of silica and isolation approach[J].Colloids & Surfaces A Physicochemical & Engineering Aspects,2018,552:130-141.
[4]
Shabbir S,Faheem M,Ali N,et al.Periphyton biofilms: A novel and natural biological system for the effective removal of sulphonated azo dye methyl orange by synergistic mechanism[J].Chemosphere,2017,167:236-246.
[5]
Nidheesh P V,Zhou M,Oturan M A.An overview on the removal of synthetic dyes from water by electrochemical advanced oxidation processes[J].Chemosphere,2018,197:210-227.
[6]
Peydayesh M,Mohammadi T,Bakhtiari O.Effective treatment of dye wastewater via positively charged TETA-MWCNT/PES hybrid nanofiltration membranes[J].Separation & Purification Technology,2018,194:488-502.
[7]
Wang X H,Jiang C L,Hou B X,et al.Carbon composite lignin-based adsorbents for the adsorption of dyes[J].Chemosphere,2018,206:587-596.
[8]
Ijaz H,Yang L,Jun W Q,et al.Nitrogen-enriched carbon sheet for Methyl blue dye adsorption[J].Journal of Environmental Management,2018,215: 123-131.
[9]
Gupta K,Khatri O P.Reduced graphene oxide as an effective adsorbent for removal of malachite green dye:Plausible adsorption pathways[J].Journal of Colloid and Interface Science,2017,501:11-21.
[10]
Othman N H,Alias N H,Shahruddin M Z,et al.Adsorption kinetics of methylene blue dyes onto magnetic graphene oxide[J].Journal of Environmental Chemical Engineering,2018,6(2):2803-2811.
[11]
Bai X,Qin C D,Feng R R,et al.Binary adsorption of 17β-estradiol and bisphenol A on superparamagnetic amino-functionalized graphene oxide nanocomposites[J].Materials Chemistry and Physics,2017,189:96-104.
[12]
Li M F,Liu Y G,Liu S B,et al.Performance of magnetic graphene oxide/diethylenetriaminepentaacetic acid nanocomposite for the tetracycline and ciprofloxacin adsorption in single and binary systems[J].Journal of Colloid and Interface Science,2018,521:150-159.
[13]
常会,范文娟,曾成华,等.磁性壳聚糖/氧化石墨烯吸附材料的制备及其对Pb(II)的吸附[J].冶金分析,2018,38(11):34-42.CHANG Hui,FAN Wen-juan,ZENG Cheng-hua,et al.Preparation of magnetic chitosan/graphene oxide composites and its adsorption performance to Pb(II)[J].Metallurgical Analysis,2018,38(11):34-42.
[14]
Zong P,Wang S,Zhao Y,et al.Synthesis and application of magnetic graphene/iron oxides composite for the removal of (VI) from aqueous solution[J].Chemical Engineering Journal,2013,220:45-52.
[15]
姚时,张鸣帅,李林璇,等.茶渣负载纳米四氧化三铁复合材料制备及其对亚甲基蓝的吸附机理[J].环境化学,2018,37(1):96-107.YAO Shi,ZHANG Ming-shuai,LI Lin-xuan,et al.Preparation of tea waste-nano Fe3O4 composite and its removal mechanism of methylene blue from aqueous solution[J].Environmental Chemistry,2018,37(1):96-107.
[16]
Minitha C R,Lalitha M,Jeyachandran Y L,et al.Adsorption behaviour of reduced graphene oxide towards cationic and anionic dyes:Co-action of electrostatic and p e p interactions[J].Materials Chemistry and Physics,2017,194:243-252.
[17]
魏金枝,陈芳妮,孙晓君,等.氨基修饰磁性氧化石墨烯吸附离子型染料性能[J].中国环境科学,2016,36(7):2020-2026.WEI Jin-zhi,CHEN Fang-ni,SUN Xiao-jun,et.al.Adsorption performance of amino functionalized magnetic graphene oxide composite to ionic dyes[J].China Environmental Science,2016,36(7):2020-2026.
[18]
Lin H,Han S K,Dong Y B,et al.The Surface characteristics of hyperbranched polyamide modified corncob and its adsorption property for Cr(VI)[J].Applied Surface Science,2017,412:152-159.
[19]
Wang C B,Zhou J W,Ni J,et al.Design and synthesis of pyrophosphate acid/graphene composites with wide stacked pores for methylene blue removal[J].Chemical Engineering Journal,2014,253:130-137.
