改性地瓜茎对废水中结晶紫的吸附性能
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摘要
采用改性地瓜茎作为新型生物吸附剂对模拟废水中结晶紫进行吸附去除,探讨吸附剂用量、pH、反应时间和染料初始质量浓度对结晶紫去除率的影响,并利用Box-Behnken响应曲面法优化吸附条件。结果表明,当pH为10、吸附剂用量为0.2g、结晶紫初始质量浓度为600mg/L和反应时间为60min时,改性地瓜茎对废水中结晶紫的最大去除率为97.9%。准二级动力学模型对试验数据的拟合效果最好,表明该吸附以离子交换吸附为主。与Freundlich和Temkin等温吸附方程相比,Langmuir模型对试验数据的拟合效果最好,表明结晶紫在地瓜茎表面的吸附以单分子层吸附为主。
The modified stem of Ipomoea batatas Lam,a new biosorbent,was used for the adsorption of crystal violet from stimulated waste water.The effect of pH,adsorbent dosage,contact time and initial concentration on removing rate of crystal violet were investigated by batch experiment,and the optimized adsorption condition was conducted by the Box-Behnken response surface methodology.The results indicate that when solution pH was 10,adsorbent dosage was 0.2g,the initial concentration was 600mg/L and contact time was 60 min,the maximal removal rate of crystal violet reached 97.9%.The pseudo-second kinetic model best fits the experimental data,indicating that the adsorption process is mainly ion exchange adsorption.The overall isothermal adsorption data is satisfactorily explained by a Langmuir isotherm adsorption model than Freundlich and Temkin equation,which indicates that the adsorption process is mainly monomolecular layer adsorption.
The modified stem of Ipomoea batatas Lam,a new biosorbent,was used for the adsorption of crystal violet from stimulated waste water.The effect of pH,adsorbent dosage,contact time and initial concentration on removing rate of crystal violet were investigated by batch experiment,and the optimized adsorption condition was conducted by the Box-Behnken response surface methodology.The results indicate that when solution pH was 10,adsorbent dosage was 0.2g,the initial concentration was 600mg/L and contact time was 60 min,the maximal removal rate of crystal violet reached 97.9%.The pseudo-second kinetic model best fits the experimental data,indicating that the adsorption process is mainly ion exchange adsorption.The overall isothermal adsorption data is satisfactorily explained by a Langmuir isotherm adsorption model than Freundlich and Temkin equation,which indicates that the adsorption process is mainly monomolecular layer adsorption.
引文
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[15]Kumar Y P,King P,Prasad V S R K.Equilibrim and Kinetic Studies for the Biosorpt in System of Copper(Ⅱ)Ion from Aqueous Solution Using Tectona grandis L.f.Leaves Powder[J].J Hazard Mater,2006,137(2):1 211-1 217.
[16]Acharya J,Sahu J N,Mohanty C,et al.Removal of Lead(Ⅱ)from Waste Water by Activated Carbon Developed from Tamarind Wood by Zinc Chloride Activation[J].Chem Eng J,2009,149(1-3):249-262.
[17]Rubin E,Rodriguez P,Herrero R,et al.Adsorption of Methylene Blue on Chemically Modified Algal Biomass:Equilibrium,Dynamic,and Surface Data[J].J Chem Eng Data,2010,55(12):5 707-5 714.
[18]Langmuir I.The Constitution and Fundamental Properties of Solids and Liquids[J].J Franklin Inst,1917,183(5):102-105.
[2]Sun S P,Li C J,Sun J H.Decolorization of an Azo Dye Orange G in Aqueous Solution by Fenton Oxidation Precede:Effect of System Parameters and Kinetic Study[J].J Hazard Mater,2009,161(2-3):1 052-1 057.
[3]Zhou M,Sarkka H,Sillanpaa M.A Comparative Experimental Study on Methyl Orange Degradation by Electrochemical Oxidation on BDD and NMO Electrodes[J].Sep Purif Technol,2011,78(3):290-297.
[4]Fersi C,Dhahbi M.Treatment of Textile Plant Effluent by Ultrafiltration and/or Nanofiltration for Water Reuse[J].Desalination,2008,222(1-3):263-271.
[5]Sun Y Z,Gong R M,Zhang X P,et al.Removal of Cationic Dyes from Water by Biosorption of Kohlrabi peel[J].China Environ Sci,2005,25(S1):61-64(in Chinese).(孙影芝,龚任敏,张小平,等.甘蓝皮生物吸附去除水中的阳离子染料[J].中国环境科学,2005,25(S1):61-64.)
[6]Uddin M T,ISLAM M A,MAHMUD S,et al.Adsorptive Removal of Methylene Blue by Tea waster[J].J Hazard Mater,2009,164(1):53-60.
[7]Zhan Y Z,Yang X D,Li Y B.Adsorption Characteristics of Congo Red and Crystal Violet Onto Sawdust[J].Ion Exch Adsorpt,2006,22(2):134-139(in Chinese).(詹予忠,杨向东,李玉博.刚果红和结晶紫在锯末上的吸附性能研究[J].离子交换与吸附,2006,22(2):134-139.)
[8]Zhang J H,Chen H J.Study on Adsorption of Crystal Violet by Modified Wheat shell Husk[J].New Chem Mater,2013,41(7):187-189(in Chinese).(张敬华,陈慧娟.改性麦壳对结晶紫的吸附作用研究[J].化工新型材料,2013,41(7):187-189.)
[9]Dong G X,Qi J Q,Pan X G,et al.Study on Adsorption of Malachite Green Using Litchi pericarps by Response Surface Methodology[J].Chem Ind Eng Prog,2014,33(7):1 925-1 931(in Chinese).(董光霞,齐金秋,潘新革,等.荔枝皮吸附水中孔雀绿的响应曲面法研究[J].化工进展,2014,33(7):1 925-1 931.)
[10]Bai S.Agricultural and Forestry Wastes Material as Potential Adsorbent for Heavy Metal Ions from A-queous Solutions:A Review[J].Environ Sci Technol,2014,37(1):94-98(in Chinese).(柏松.农林废弃物在重金属废水吸附处理中的研究进展[J].环境科学与技术,2014,37(1):94-98.)
[11]Dang Y,Luo Q,Li K B,et al.Biosorption of Rhodamine-B by Buckwheat hull:Response Surface Methodology and Thermodynamics Study[J].Acta Sci Circumstantiae,2011,31(12):2 601-2 608(in Chinese).(党艳,罗倩,李克斌,等.荞麦皮生物吸附去除水中罗丹明B的吸附条件响应面法及热力学研究[J].环境科学学报,2011,31(12):2 601-2 608.)
[12]Feng Y F.Preparation of Biosorbent Based on Agriculture Byproducts and Study of Removing Dyeing Wastewater[D].Beijing:University of Chinese A-cademy of Sciences,2013,1-85(in Chinese).(冯彦房.基于农业副产物的生物吸附剂的制备及其对印染废水的净化研究[D].北京:中国科学院大学,2013,1-85.)
[13]Visa M,Andronic L,Lucaci D.Concurrent Dyes Adsorption and Photo-degradation on Fly Ash Based Substrates[J].Adsorption,2011,17(1):101-108.
[14]Gao Y Y,Zhang Y,Zhang X B,et al.Study on Anti-inflammation Effect of Extracts fromSweet potato Stem and Leaf[J].Food Sci,2006,27(12):726-728(in Chinese).(高荫榆,张彧,张锡斌,等.红薯茎叶提取物抗炎作用的研究[J].食品科学,2006,27(12):726-728.)
[15]Kumar Y P,King P,Prasad V S R K.Equilibrim and Kinetic Studies for the Biosorpt in System of Copper(Ⅱ)Ion from Aqueous Solution Using Tectona grandis L.f.Leaves Powder[J].J Hazard Mater,2006,137(2):1 211-1 217.
[16]Acharya J,Sahu J N,Mohanty C,et al.Removal of Lead(Ⅱ)from Waste Water by Activated Carbon Developed from Tamarind Wood by Zinc Chloride Activation[J].Chem Eng J,2009,149(1-3):249-262.
[17]Rubin E,Rodriguez P,Herrero R,et al.Adsorption of Methylene Blue on Chemically Modified Algal Biomass:Equilibrium,Dynamic,and Surface Data[J].J Chem Eng Data,2010,55(12):5 707-5 714.
[18]Langmuir I.The Constitution and Fundamental Properties of Solids and Liquids[J].J Franklin Inst,1917,183(5):102-105.