Please wait a minute...
J4  2013, Vol. 47 Issue (11): 1951-1957    DOI: 10.3785/j.issn.1008-973X.2013.11.010
    
Adsorption of Sb(Ⅲ) in aqueous by MnO2-modified carbon nanotubes
ZENG Chao, YU Ting-chao, WANG Xiao-hui, ZHANG Li-juan
Institute of Municipal Engineering, Zhejiang University, Hangzhou 310058, China
Download:   PDF(0KB) HTML
Export: BibTeX | EndNote (RIS)      

Abstract  

A novel kind of manganese dioxide supported on multiwalled carbon nanotubes (MnO2/MWNTs) was prepared by Liquid redox method for Sb(III) removal. The MnO2 modified CNTs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), laser particle size analyzer and N2 adsorption-desorption. The static adsorption study was carried out and parameters affecting the adsorption efficiencies including solution pH value, initial Sb(III) concentration, adsorbent dosage, contact time and temperature were investigated. The results indicate that the removal rate of Sb(III) by MnO2 modified CNTs is 97.72% under the initial Sb(III) concentration of 1.5 mg/L, adsorbents dosage of 0.5 g/L, temperature of 298 K, and pH value of 2.00, which is 51.29% higher than that of the raw CNTs. The adsorption capacity correspondingly increases from 3.01 mg/g to 6.00 mg/g. The equilibrium adsorption data can be fitted to the Freundlich adsorption isotherm. In addition, it has been found that the pH values have great impacts on the adsorption efficiency.



Published: 01 November 2013
CLC:  X 131.2  
Cite this article:

ZENG Chao, YU Ting-chao, WANG Xiao-hui, ZHANG Li-juan. Adsorption of Sb(Ⅲ) in aqueous by MnO2-modified carbon nanotubes. J4, 2013, 47(11): 1951-1957.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2013.11.010     OR     http://www.zjujournals.com/eng/Y2013/V47/I11/1951


二氧化锰改性多壁碳纳米管吸附水中Sb(Ⅲ)

采用液相氧化还原法制备二氧化锰/多壁碳纳米管(MnO2/MWNTs)复合材料,利用X射线衍射仪(XRD)、扫描电镜(SEM)、透射电镜(TEM)、激光粒度仪和N2吸附-脱附对改性前后MWNTs的物化性能进行表征.通过对水中Sb(Ⅲ)的静态吸附试验考察改性碳纳米管的吸附容量,同时还考察pH值、锑的初始浓度、吸附剂投加量、吸附时间和温度对吸附效果的影响.结果表明,在Sb(Ⅲ)初始浓度为1.5 mg/L、吸附剂投加量为0.5 g/L、温度为298 K、pH值为2.00的条件下,二氧化锰改性后的碳纳米管对锑的去除率可达到97.72%,比未改性碳纳米管的去除率提高51.29%,吸附容量也从原始CNT的3.01 mg/g增大到6.00 mg/g.最后发现该吸附过程较好地符合Freundlich吸附等温线,pH值对吸附效果的影响较大.

[1] FILELLAA M,BELZILEB N,LETT M C . Antimony in the environment: a review focused on natural waters III. microbiota relevant interactions[J]. Earth-Science Reviews, 2007, 80(3/4): 195-217.
[2] 张道勇,潘响亮,穆桂金,等. 铝渣吸附去除水中锑的研究.水处理技术, 2008, 34(10): 34-37.
ZHANG Dao-yong, PAN Xiang-liang, MU Gui-jin,et al. Removal of antimony by from water by adsorption to red mud [J]. Technology of Water Treatment, 2008, 34(10): 34-37.
[3] 何万年,赵旺盛,何思颊.离子交换法净化铜电解液中的铋和锑[J].新疆有色金属, 1997, (4):27-32.
HE Wan-nian, ZHAO Wang-sheng, HE Si-jia. Buccal ion exchange chromatography copper electrolyte purification of bismuth and antimony [J]. Xinjiang Non-ferrous Metal, 1997, (4) : 27-32.
[4] LIJIMA S. Helical microtubules of graphitie carbon [J]. Nature, 1991, 354(6348): 56-58.
[5] KUO C Y.Water purication of removal aqueous copper(II) by as-grown and modified multiwalled carbon nanotubes [J]. Desalination, 2009, 249: 781-785.
[6] LI Y H, WANG S G, CAO A Y, et al. Adsorption of fluoride from water by amorphous alumina supported on carbon physies letters [J]. ChemPhys Lett, 2001, 350: 412-416.
[7] PENG X J, LUAN Z H, DI Z C,et al. Carbon nanotubes-iron oxides magnetic composites as adsorbent for removal of Pd(II) and Cu(II) from water [J]. Carbon, 2005,43: 855-894.
[8] SAHOO R N, DAS S C, REDDY B R, et al. Adsorption of copper on manganese nodule residue obtained from NH3-SO2 leaching[J]. Hydrometallurgy, 2001, 62: 185-192.
[9] FAN H J, ANDERSON P R. Copper and cadmium removal by Mn oxide-coated granular activated carbon [J]. Separation and Purification Technology, 2005, 45: 61-67.
[10] HAN R P, ZOU W H, LI H K,et al. Copper(II) and lead(II) removal from aqueous solution in fixed-bed columns by manganese oxide coated zeolite [J]. Journal of Hazardous Materids, 2006, 137(2): 934-942.
[11] BOONFUENG T, AXE L, XU Y. Properties and structure of manganese oxide-coated clay[J]. Journal of Colloid and Interface Science, 2005, 281: 80-92.
[12] RICHTER M, BERNDT H, ECKELT R, et al. Zeolite-mediated removal of NO2 by NH3 from exhaust streams at low temperatures[J]. Catalysis Today, 1999, 54: 531-545.
[13] THANABALASINGAM P, PICKERING W F. Specific Sorption of Antimony(Ⅲ) by the Hydrous Oxides of Mn, Fe,and Al \
[J\].Water, Air, and Soil Pollution, 1990, 49: 175-185.
[14] MAA S B, AHNB K Y, LEE E S, et al. Synthesis and characterization of manganese dioxide spontaneously coated on carbon nanotubes[J]. Carbon, 2007, 45(2) : 375-382.
[15] KILISLIOGLU A, BILGIN B. Thermodynamic and kinetic investigations of uranium adsorption on amberlite IR-118H resin \
[J\]. Applied Radiation and Isotopes, 2003, 58(2): 155-160.
[16] DUBININ M M, RADUSHKEVICH L V. Equation of the characteristic curve of the activated charcoal \
[J\]. Chemisches Zentralblan, 1947, 55: 3-31.
[17] ONYANGO M S, KOJIMA Y, AOYI O, et al. Adsorption equilibrium modeling and solution chemistry dependence of uoride removal from water by trivalent-cation-exchanged zeolite F-9 \
[J\].Journal of Colloid and Interface Science, 2004, 279: 341-350.
[18] MAHRAMANLIOGLU M, KIZILCIKLI I, BICER I.O. Adsorption of fluoride from aqueous solution by acid treated spent bleaching earth \
[J\]. Journal of Fluorine Chemistry, 2002. 115(1): 41-47.
[19] KANG M, KAWSAKI M, TAMADA S, et al. Effect of pH on the removal of arsenic and antimony using reverse osmosis membranes \
[J\]. Desalination, 2000, 131: 293-298.
[20] NASIR K, SHUJAAT A, et al. Potential of rice husks for antimony removal \
[J\].Applied Radiation and Isotopes, 2000, 52: 31-38.

[1] WANG Xiao-hui, YU Ting-chao, LI Cong, YE Miao-miao. The adsorption of Sb(Ⅲ) in aqueous by KMnO4-modified
activated carbon
[J]. J4, 2012, 46(11): 2028-2034.
[2] CHEN Xin-feng, SHAO Wei-yun, YE Miao-miao. Study on  adsorption of Fe(II) and Mn(II) in aqueous
by titanate nanowires
[J]. J4, 2012, 46(5): 818-823.