PVP功能化石墨烯高效吸附废水中大分子染料
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摘要
利用聚乙烯吡咯烷酮(PVP)和石墨烯与染料分子的结合特性,合成了PVP功能化石墨烯纳米材料(PVPGNs),对其进行了表征,并考察该材料对水中酸性红(ASG)和孔雀石绿(MG)等染料的吸附能力。结果表明,当pH为7、温度为40℃、时间为10 min、材料的质量浓度1 g/L时,ASG的最大吸附率达到93.41%,最大吸附量达到93.41 mg/g;当pH为5、温度为40℃、时间为10 min、材料用量0.5 m L,材料的质量浓度1 g/L时,MG的最大吸附率达到83.38%,最大吸附量达到83.38 mg/g。等温吸附模型的拟合结果表明,PVP-GNs对ASG和MG的理论最大吸附量分别达到1 887、1 976 mg/g。且PVP-GNs具备良好的染料脱附性能。因此,该材料在染料废水脱色方面具有很大的应用潜力与价值。
Polyvinylpyrrolidone(PVP) functionalized graphene nanomaterials(PVP-GNs) were synthesized by adsorption properties of dyes with PVP and graphene, it was characterized and the adsorption capacity of acid red(ASG) and malachite green(MG) was investigated. The results showed that,when the pH, temperature, time, the material amount and material mass concentration was 7, 40 ℃, 10 min, 0.5 mL and 1 g/L respectively, the maximum adsorption rate of ASG reached 93.41%, and maximum adsorption capacity reached 93.41 mg/g; When the pH, temperature, time, the material amount and material concentration was 5, 40 ℃, 10 min, 0.5 mL and 1 g/L, the maximum adsorption rate of MG reached 83.38%, and maximum adsorption capacity reached 83.38 mg/g. This fitting results of isothermal adsorption model showed that the theoretical maximum adsorption capacity of PVP-GNs for ASG and MG reached 1 887 and 1 976 mg/g. The PVP-GNs showed that it has good dye desorption properties. Therefore, the material has great potential in decolorization of dye wastewater.
Polyvinylpyrrolidone(PVP) functionalized graphene nanomaterials(PVP-GNs) were synthesized by adsorption properties of dyes with PVP and graphene, it was characterized and the adsorption capacity of acid red(ASG) and malachite green(MG) was investigated. The results showed that,when the pH, temperature, time, the material amount and material mass concentration was 7, 40 ℃, 10 min, 0.5 mL and 1 g/L respectively, the maximum adsorption rate of ASG reached 93.41%, and maximum adsorption capacity reached 93.41 mg/g; When the pH, temperature, time, the material amount and material concentration was 5, 40 ℃, 10 min, 0.5 mL and 1 g/L, the maximum adsorption rate of MG reached 83.38%, and maximum adsorption capacity reached 83.38 mg/g. This fitting results of isothermal adsorption model showed that the theoretical maximum adsorption capacity of PVP-GNs for ASG and MG reached 1 887 and 1 976 mg/g. The PVP-GNs showed that it has good dye desorption properties. Therefore, the material has great potential in decolorization of dye wastewater.
引文
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[2]方玲,孟冠华,魏旺,等.苯系染料中间体生产废水的处理技术现状与发展[J].染料与染色,2016(4):42-50.
[3]薛锐,赵美玲.印染废水脱色的研究进展[J].环境科学与管理,2005,30(3):30-33.
[4]NASIRI R,ARSALANI N.Synthesis and application of 3D graphene nanocomposite for the removal of cationic dyes from aqueous solutions:Response surface methodology design[J].Journal of Cleaner Production,2018,190:63-71.
[5]WANG F,WANG H,ZHANG H,et al.Superior azo-dye degradation of Fe-Si-B-P amorphous powders with graphene oxide addition[J].Journal of Non-Crystalline Solids,2018,491:34-42.
[6]QI C,ZHAO L,LIN Y,et al.Graphene oxide/chitosan sponge as a novel filtering material for the removal of dye from water[J].Journal of Colloid&Interface Science,2018,517:18-27.
[7]BHATTACHARYYA A,BANERJEE B,GHORAI S,et al.Development of an auto-phase separable and reusable graphene oxide-potato starch based cross-linked bio-composite adsorbent for removal of methylene blue dye[J].International Journal of Biological Macromolecules,2018.
[8]刘芳,樊丰涛,吕玉翠,等.石墨烯及其复合材料吸附去除难降解有机物的研究进展[J].石油学报(石油加工),2016,32(4):856-866.
[9]B魻NNEMANN H,BRIJOUX W,BRINKMANN R,et al.Preparation,characterization,and application of fine metal particles and metal colloids using hydrotriorganoborates[J].Journal of Molecular Catalysis Lausanne,1994,86(1/3):129-177.
[10]周家伟.聚乙烯吡咯烷酮与各类染料的缔合作用比较[J].染整技术,2009,31(2):10-12.
[11]郝梦秋.氧化石墨烯-铁氧化物复合吸附剂的制备及性能研究[D].长沙:中南大学,2014.
[12]GUO Y,GUO S,REN J,et al.Cyclodextrin functionalized graphene nanosheets with high supramolecular recognition capability:synthesis and host-guest inclusion for enhanced electrochemical performance[J].Acs Nano,2010,4(7):4001.
[13]LO S F,WANG S Y,TSAI M J,et al.Adsorption capacity and removal efficiency of heavy metal ions by Moso and Ma bamboo activated carbons[J].Chemical Engineering Research&Design,2012,90(9):1397-1406.
[14]PINTO J R,AND S W N,NICHOLAS M.Aqueous dye diffusion in thin films of water-soluble poly(vinyl pyrrolidone)copolymers:Adynamic secondary ion mass spectrometry study[J].Journal of Physical Chemistry B,1999,103(37):8026-8032.
[15]GHANEI M,RASHIDI A,TAYEBI H A,et al.Removal of acid blue25 from aqueous media by magnetic-SBA-15/CPAA super adsorbent:Adsorption isotherm,kinetic,and thermodynamic studies[J].Journal of Chemical&Engineering Data,2018,63:3592-3605.
[16]TAN P,HU Y.Improved synthesis of graphene/β-cyclodextrin composite for highly efficient dye adsorption and removal[J].Journal of Molecular Liquids,2017,242:181-189.
[17]EL-BINDARY A A,DIAB M A,HUSSIEN M A,et al.Adsorption of Acid Red 57 from aqueous solutions onto polyacrylonitrile/activated carbon composite[J].Spectrochimica Acta Part A:Molecular and Biomolecular Spectroscopy,2014,124:70-77.
[18]ZHANG C,CHEN Z,GUO W,et al.Simple fabrication of Chitosan/Graphene nanoplates composite spheres for efficient adsorption of acid dyes from aqueous solution[J].International Journal of Biological Macromolecules,2018,112:1048-1054.
[19]WANG L,YAN W,HE C,et al.Microwave-assisted preparation of nitrogen-doped biochars by ammonium acetate activation for adsorption of acid red 18[J].Applied Surface Science,2018,433:222-231.
[20]LAWAL I A,MOODLEY B.Column,kinetic and isotherm studies of PAH(phenanthrene)and dye(acid red)on kaolin modified with 1-hexy l,3-decahexyl imidazolium ionic liquid[J].Journal of Environmental Chemical Engineering,2016,4(3):2774-2784.
[21]HAMEED B H,EL-KHAIARY M I.Malachite green adsorption by rattan sawdust:isotherm,kinetic and mechanism modeling[J].Journal of Hazardous Materials,2008,159(2/3):574-579.
[22]SHARIFPOUR E,KHAFRI H Z,GHAEDI M,et al.Isotherms and kinetic study of ultrasound-assisted adsorption of malachite green and Pb2+ions from aqueous samples by copper sulfide nanorods loaded on activated carbon:Experimental design optimization[J].Ultrasonics Sonochemistry,2018,40:373-382.
[23]ABDELRAHMAN E A.Synthesis of zeolite nanostructures from waste aluminum cans for efficient removal of malachite green dye from aqueous media[J].Journal of Molecular Liquids,2018,253:72-82.
[24]GUPTA K,KHATRI O P.Reduced graphene oxide as an effective adsorbent for removal of malachite green dye:Plausible adsorption pathways[J].J Colloid Interface Sci,2017,501:11-21.