酸化时间对磁性碳纳米管制备及吸附菲的影响
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摘要
采用共沉淀法对混酸氧化的多壁碳纳米管(MWCNTs)进行磁化,形成了Fe_3O_4/MWCNTs磁性复合材料(MMWCNTs).研究了酸化时间对MMWCNTs制备及其吸附水中菲性能的影响.结果表明:弱酸条件下吸附效果较好,MMWCNTs对水中菲的吸附在30min内快速上升,到60min时基本达到平衡,吸附过程符合准二级动力学模型.MMWCNTs对水中菲的饱和吸附量随酸化时间增加呈现先升高后降低的趋势.酸化7h后制备的MMWCNTs的饱和吸附量最大,达到17.56μg/mg.
The multi-walled carbon nanotubes oxidized by mixed acids were magnetized by the co-precipitation method to form a kind of magnetic composite material of ferroferric oxide/multi-wall carbon nanotubes(MMWCNTs). The effects of acidification time on the preparation of MMWCNTs and their adsorption properties for phenanthrene in water were investigated. Experimental results indicated that the adsorption of phenanthrene was better under weak acid conditions.The adsorption of phenanthrene on MMWCNTs processed quickly within 30 minutes, and basically reached equilibrium at 60 minutes. The regression results showed that the adsorption kinetics were more accurately represented by the pseudo second-order model. The saturation adsorption capacity of phenanthrene on MMWCNTs represented a trend of increasing first and then decreasing with increasing acidification time. The maximal saturation adsorption capacity of phenanthrene on MMWCNTs was 17.56μg/mg based on MWCNTs after 7 h acidification.
The multi-walled carbon nanotubes oxidized by mixed acids were magnetized by the co-precipitation method to form a kind of magnetic composite material of ferroferric oxide/multi-wall carbon nanotubes(MMWCNTs). The effects of acidification time on the preparation of MMWCNTs and their adsorption properties for phenanthrene in water were investigated. Experimental results indicated that the adsorption of phenanthrene was better under weak acid conditions.The adsorption of phenanthrene on MMWCNTs processed quickly within 30 minutes, and basically reached equilibrium at 60 minutes. The regression results showed that the adsorption kinetics were more accurately represented by the pseudo second-order model. The saturation adsorption capacity of phenanthrene on MMWCNTs represented a trend of increasing first and then decreasing with increasing acidification time. The maximal saturation adsorption capacity of phenanthrene on MMWCNTs was 17.56μg/mg based on MWCNTs after 7 h acidification.
引文
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[25]Wang X,Liu Y,Tao S,et al.Relative importance of multiple mechanisms in sorption of organic compounds by multiwalled carbon nanotubes[J].Carbon,2010,48(13):3721-3728.
[2]Dat N D,Chang M B.Review on characteristics of PAHs in atmosphere,anthropogenic sources and control technologies[J].Science of the Total Environment,2017,609:682-693.
[3]Yang K,Wang X,Zhu L,et al.Competitive sorption of pyrene,phenanthrene,and naphthalene on multiwalled carbon nanotubes[J].Environmental Science&Technology,2006,40(18):5804-5810.
[4]Chen K,Zhu Q,Qian Y,et al.Microcalorimetric investigation of the effect of non-ionic surfactant on biodegradation of pyrene by PAH-degrading bacteria Burkholderia cepacia[J].Ecotoxicology&Environmental Safety,2013,98:361-367.
[5]李婷,陈冰,马虹.UV-Fenton催化氧化法对采油废水中多环芳烃的处理效果[J].环境工程学报,2012,6(10):3475-3480.Li T,Chen B,Ma H.Catalytic oxidation of polycyclic aromatic hydrocarbons in oil field wastewater by UV-Fenton[J].Chinese Journal of Environmental Engineering,2012,6(10):3475-3480.
[6]Lamichhane S,Bal Krishna K C,Sarukkalige R.Polycyclic aromatic hydrocarbons(PAHs)removal by sorption:A review[J].Chemosphere,2016,148:336-353.
[7]王旺阳,刘聪,袁珮.吸附法去除环境中多环芳烃的研究进展[J].化工进展,2017,36(1):355-363.Wang W Y,Liu C,Yuan P.Advances on the removal of polycyclic aromatic hydrocarbons in environment by adsorption[J].Chemical Industry and Engineering Progress,2017,36(1):355-363.
[8]Peng H,Zhang D,Pan B,et al.Contribution of hydrophobic effect to the sorption of phenanthrene,9-phenanthrol and 9,10-phenanthrenequinone on carbon nanotubes[J].Chemosphere,2017,168:739-747.
[9]Glomstad B,Altin D,S?rensen L,et al.Carbon nanotube properties influence adsorption of phenanthrene and subsequent bioavailability and toxicity to Pseudokirchneriella subcapitata[J].Environmental Science&Technology,2016,50(5):2660-2668.
[10]Kim H,Yu S H,Sharma V K.Adsorption of antibiotics and iopromide onto single-walled and multi-walled carbon nanotubes[J].Chemical Engineering Journal,2014,255(6):23-27.
[11]Daneshvar Tarigh G,Shemirani F.Magnetic multi-wall carbon nanotube nanocomposite as an adsorbent for preconcentration and determination of lead(II)and manganese(II)in various matrices[J].Talanta,2013,115:744-750.
[12]Gupta V K,Agarwal S,Saleh T A.Chromium removal by combining the magnetic properties of iron oxide with adsorption properties of carbon nanotubes[J].Water Research,2011,45(6):2207-2212.
[13]Fazelirad H,Ranjbar M,Taher M A,et al.Preparation of magnetic multi-walled carbon nanotubes for an efficient adsorption and spectrophotometric determination of amoxicillin[J].Journal of Industrial&Engineering Chemistry,2015,21(1):889-892.
[14]Hou P X,Bai S,Yang Q H,et al.Multi-step purification of carbon nanotubes[J].Carbon,2002,40(1):81-85.
[15]Li S,He M,Li Z,et al.Removal of humic acid from aqueous solution by magnetic multi-walled carbon nanotubes decorated with calcium[J].Journal of Molecular Liquids,2017,230:520-528.
[16]Wang S,Zhai Y Y,Gao Q,et al.Highly efficient removal of Acid Red18 from aqueous solution by magnetically retrievable chitosan/carbon nanotube:Batch study,isotherms,kinetics,and thermodynamics[J].Journal of Chemical&Engineering Data,2014,59(1):39-51.
[17]Nasirimoghaddam S,Zeinali S,Sabbaghi S.Chitosan coated magnetic nanoparticles as nano-adsorbent for efficient removal of mercury contents from industrial aqueous and oily samples[J].Journal of Industrial&Engineering Chemistry,2015,27:79-87.
[18]平立凤,骆永明.有机质对多环芳烃环境行为影响的研究进展[J].土壤,2005,37(4):362-369.Ping L F,Luo Y M.Effects of organic matter on environmrntal behaviors of polycyclic aromatic hydrocarbons[J].Soils,2005,37(4):362-369.
[19]李文斌,孟昭福,吴琼,等.添加复合吸附剂对塿土吸附菲和Cr(Ⅵ)的影响[J].环境科学,2016,37(11):4419-4427.Li W B,Meng Z F,Wu Q,et al.Effect of Adding Compound Adsorbent on Phenanthrene and Cr(Ⅵ)Absorption by Lou Soil[J].Environmental Science,2016,37(11):4419-4427.
[20]Tonucci M C,Gurgel L V A,Aquino S F D.Activated carbons from agricultural byproducts(pine tree and coconut shell),coal,and carbon nanotubes as adsorbents for removal of sulfamethoxazole from spiked aqueous solutions:Kinetic and thermodynamic studies[J].Industrial Crops&Products,2015,74:111-121.
[21]Alimohammadi V,Sedighi M,Jabbari E.Experimental study on efficient removal of total iron from wastewater using magneticmodified multi-walled carbon nanotubes[J].Ecological Engineering,2017,102:90-97.
[22]Arasteh R,Masoumi M,Rashidi A M,et al.Adsorption of2-nitrophenol by multi-wall carbon nanotubes from aqueous solutions[J].Applied Surface Science,2010,256(14):4447-4455.
[23]Hou L,Zhu D,Wang X,et al.Adsorption of phenanthrene,2-naphthol,and 1-naphthylamine to colloidal oxidized multiwalled carbon nanotubes:effects of humic acid and surfactant modification[J].Environmental Toxicology&Chemistry,2013,32(3):493-500.
[24]Wu W,Chen W,Lin D,et al.Influence of surface oxidation of multiwalled carbon nanotubes on the adsorption affinity and capacity of polar and nonpolar organic compounds in aqueous phase[J].Environmental Science&Technology,2012,46(10):5446-5454.
[25]Wang X,Liu Y,Tao S,et al.Relative importance of multiple mechanisms in sorption of organic compounds by multiwalled carbon nanotubes[J].Carbon,2010,48(13):3721-3728.