诺氟沙星在壳聚糖-生物炭复合材料上的解吸行为研究
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摘要
吸附材料再生可以实现吸附材料的循环使用,降低处理成本。本文研究了壳聚糖-生物炭复合材料上诺氟沙星(NOR)解吸的影响因素,考察了NOR解吸动力学过程,并通过多次再生实验探讨了其重复使用潜力。结果表明,以NaOH为解吸剂时有利于促进壳聚糖-生物炭复合材料上NOR的解吸,随NaOH浓度的提高,NOR的解吸率增大。溶液离子强度提高了NOR的解吸率,离子强度为0.1mol/L时NOR的解吸效果最好。热力学参数ΔG和ΔS表明该解吸过程是自发进行的吸热反应。NOR在壳聚糖-生物炭复合材料上的解吸主要受慢解吸和极慢解吸控制。双常数方程和Elovich方程可较好描述复合材料上NOR的解吸动力学行为。壳聚糖-生物炭复合材料重复使用6次后,NOR的解吸率为66.88%,吸附量为8.675mg/g,表明壳聚糖-生物炭复合材料具有较好的可循环利用潜能。
The regeneration treatment of the adsorbent can improveadsorbent cyclic utilization and reduce costs.In this paper,the effect of norfloxacin(NOR)desorption onchitosan-biochar compositewas investigated,and the desorption kinetics process and adsorption regeneration cycles of NOR was discussed.Results showed that alkaline condition promoted the NOR desorption on chitosan-biochar composite.The desorption efficiency of NOR increased with the increasing of NaOH concentration.The thermodynamic constants(ΔG andΔS)indicated that the desorption process was spontaneous and endothermic.NOR desorption showed a positive relationship with cation concentration in desorbing solution,reaching a optimum desorption efficiency at cation concentration of 0.1 mol/L.Desorption process of NOR was mainly controlled by slow and extreme slow desorption fractions.Thedesorption data of NOR could be well described by two-constant equation and Elovich equation.After 6 cycles consecutive regeneration,desorption efficiency and adsorption capacity was 66.88%and 8.675 mg/g,respectively.It can be concluded that chitosan-biochar composite has potential for recycling.
The regeneration treatment of the adsorbent can improveadsorbent cyclic utilization and reduce costs.In this paper,the effect of norfloxacin(NOR)desorption onchitosan-biochar compositewas investigated,and the desorption kinetics process and adsorption regeneration cycles of NOR was discussed.Results showed that alkaline condition promoted the NOR desorption on chitosan-biochar composite.The desorption efficiency of NOR increased with the increasing of NaOH concentration.The thermodynamic constants(ΔG andΔS)indicated that the desorption process was spontaneous and endothermic.NOR desorption showed a positive relationship with cation concentration in desorbing solution,reaching a optimum desorption efficiency at cation concentration of 0.1 mol/L.Desorption process of NOR was mainly controlled by slow and extreme slow desorption fractions.Thedesorption data of NOR could be well described by two-constant equation and Elovich equation.After 6 cycles consecutive regeneration,desorption efficiency and adsorption capacity was 66.88%and 8.675 mg/g,respectively.It can be concluded that chitosan-biochar composite has potential for recycling.
引文
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[11]曹丽霞,李艳香,杨传芳.壳聚糖对Cu2+的吸附与解吸[J].环境工程,2014(S1):48-53.Cao L X,Li Y X,Yang C F.Cu2+adsorption and desorption by chitosan[J].Environmental Engineering,2014(1):48-53.
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[19] Al-Degs Y S,El-Barghouthi M I,El-Sheikh A H,et al.Effect of solution pH,ionic strength,and temperature on adsorption behavior of reactive dyes on activated carbon[J].Dyes and Pigments,2008,77(1):16-23.
[20]周传辉,夏星辉,李辛,等.菲在四种碳纳米管上的解吸行为研究[J].环境科学学报,2011,31(11):2459-2466.Zhou C H,Xia X H,Li X,et al.Desorption of phenanthrene sorbed on multi-walled carbon nanotubes[J].Acta Scientiate Circumstantiate,2011,31(11):2459-2466.
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[22]郭丽,王淑平,周志强,等.环丙沙星在深浅两层潮土层中吸附-解吸特性研究[J].农业环境科学学报,2014(12):2359-2367.Guo L,Wang S P,Zhou Z Q,et al.Adsorption and desorption of ciprofloxacin by surface and subsurface soils of ustic cambosols in China[J].Journal of Agro-Environment Science,2014(12):2359-2367.
[23]许超,夏北城,林颖.EDTA和柠檬酸对污染土壤中重金属的解吸动力学及其形态的影响[J].水土保持学报,2009(4):146-151.Xu C,Xia B C,Lin Y.Kinetics of heavy metals desorption by EDTA and citric in contaminated soil and their redistribution of fractions[J].Journal of Soil and Water Conservations,2009(4):146-151.
[24]王代长,蒋新,卞永荣,等.模拟酸雨条件下Cd2+在土壤及其矿物表面的解吸动力学特征[J].环境科学,2004,25(4):117-122.Wang D C,Jiang X,Bian Y R,et al.Kinetics characteristics of Cd2+desorption in minerals and soils under simulated acid rain[J].Environmental Science,2004,25(4):117-122.
[2]张涵瑜,王兆炜,高俊红,等.芦苇基和污泥基生物炭对水体中诺氟沙星的吸附性能[J].环境科学,2016,37(2):689-696.Zhang H Y,Wang Z W,Gao J H,et al.Adsorption characteristics of norfloxacin by biochars derived from reed straw and municipal sludge[J].Environmental Science,2016,37(2):689-696.
[3] DrilliaP,Stamatelatou K,Lyberatos G.Fate and mobility of pharmaceuticals in solid matrices[J].Chemosphere,2005,60(8):725-759.
[4] Luo Y,Xu L,Rysz M,et al.Occurrence and transport of tetracycline,sulfonamide,quinolone,and macrolide antibiotics in the Haihe River Basin,China[J].Environmental Science&Technology,2011,45(5):1827-1833.
[5] Golet E M,Xifra I,Siegrist H,et al.Environmental exposure assessment of fluoroquinolone antibacterial agents from sewage to soil[J].Environmental Science&Technology,2003,37(15):3243-3249.
[6] Lindberg R H,Wennberg P,Johansson M I,et al.Screening of human antibiotic substances and determination of weekly mass flows in five sewage treatment plants in Sweden[J].Environmental Science&Technology,2005,39(10):3421-3429.
[7] Carabineiro S A C,Thavorn-Amornsri T,Pereira M F R,et al.Adsorption of ciprofloxacin on surface-modified carbon materials[J].Water Research,2011,45(15):4583-4591.
[8] Pati珘no Y,Díaz E,Ordó珘nez S,et al.Adsorption of emerging pollutants on functionalized multiwall carbon nanotubes[J].Chemosphere,2015,136:174-180.
[9] Guo D,Shi Q,He B,et al.Different solvents for the regeneration of the exhausted activated carbon used in the treatment of coking wastewater[J].Journal of Hazardous Materials,2011,186(2):1788-1793.
[10]叶李艺,钟辉,张会平.对氯苯酚在活性炭上的吸附与脱附工艺[J].厦门大学学报(自然科学版),1998(4):78-82.Ye L Y,Zhong H,Zhang H P,et al.Studies of process for adsorption and desorption of p-Chlorophenol of activated carbon[J].Journal of Xiamen University(Natural Science),1998(4):78-82.
[11]曹丽霞,李艳香,杨传芳.壳聚糖对Cu2+的吸附与解吸[J].环境工程,2014(S1):48-53.Cao L X,Li Y X,Yang C F.Cu2+adsorption and desorption by chitosan[J].Environmental Engineering,2014(1):48-53.
[12]程华丽,李瑾,王涵,等.壳聚糖/蒙脱土插层复合物对活性红染料的吸附动力学及解吸性能[J].环境化学,2014,33(1):115-122.Cheng H L,Li J,Wang H,et al.Adsorption kinetics of chitosan/montmorillonite intercalation composites for Reactive Red dye and desorption properties[J].Environmental Chemistry,2014,33(1):115-122.
[13] Zhou Y M,Gao B,Zimmerman A R,et al.Sorption of heavy metals on chitosan-modified biochars and its biological effects[J].Chemical Engineering Journal,2013,231:512-518.
[14]朱国营,陈萍萍.壳聚糖改性竹制粉末活性炭吸附剂对微囊藻毒素的吸附特性研究[J].环境科学学报,2012,32(4):790-795.Zhu G Y,Chen P P.Adsorption characteristics of microcystin-RR by a synthetic powdered bamboo charcoal mixed with chiyosan[J].Acta Scientiate Circumstantiate,2012,32(4):790-795.
[15] Zhang M M,Liu Y G,Li T T,et al.Chitosan modification of magnetic biochar produced from Eichhornia crassipes for enhanced sorption of Cr(VI)from aqueous solution[J].RSC Advances,2015,5(58):46955-46964.
[16]庞会玲,杨桂朋,高先池,等.pH及表面活性剂对诺氟沙星在海洋沉积物上吸附行为的影响[J].环境科学,2012(1):129-134.Pang H L,Yang G P,Gao X C,et al.Impacts of pH and surfactants on adsorption behaviors of norfloxacin on marine sediments[J].Environmental Science,2012(1):129-134.
[17]Wu Q,Li Z,Hong H,et al.Desorption of ciprofloxacin from clay mineral surfaces[J].Water Research,2013,47(1):259-268.
[18] Vilar V J P,Botelho C M S,Boaventura R A R.Influence of pH,ionic strength and temperature on lead biosorption by Gelidium and agar extraction algal waste[J].Process Biochemistry,2005,40(10):3267-3275.
[19] Al-Degs Y S,El-Barghouthi M I,El-Sheikh A H,et al.Effect of solution pH,ionic strength,and temperature on adsorption behavior of reactive dyes on activated carbon[J].Dyes and Pigments,2008,77(1):16-23.
[20]周传辉,夏星辉,李辛,等.菲在四种碳纳米管上的解吸行为研究[J].环境科学学报,2011,31(11):2459-2466.Zhou C H,Xia X H,Li X,et al.Desorption of phenanthrene sorbed on multi-walled carbon nanotubes[J].Acta Scientiate Circumstantiate,2011,31(11):2459-2466.
[21] Xu Y,Gan J,Wang Z,et al.Effect of aging on desorption kinetics of sediment-associated pyrethroids[J].Environmental Toxicology and Chemistry,2008,27(6):1293-1301.
[22]郭丽,王淑平,周志强,等.环丙沙星在深浅两层潮土层中吸附-解吸特性研究[J].农业环境科学学报,2014(12):2359-2367.Guo L,Wang S P,Zhou Z Q,et al.Adsorption and desorption of ciprofloxacin by surface and subsurface soils of ustic cambosols in China[J].Journal of Agro-Environment Science,2014(12):2359-2367.
[23]许超,夏北城,林颖.EDTA和柠檬酸对污染土壤中重金属的解吸动力学及其形态的影响[J].水土保持学报,2009(4):146-151.Xu C,Xia B C,Lin Y.Kinetics of heavy metals desorption by EDTA and citric in contaminated soil and their redistribution of fractions[J].Journal of Soil and Water Conservations,2009(4):146-151.
[24]王代长,蒋新,卞永荣,等.模拟酸雨条件下Cd2+在土壤及其矿物表面的解吸动力学特征[J].环境科学,2004,25(4):117-122.Wang D C,Jiang X,Bian Y R,et al.Kinetics characteristics of Cd2+desorption in minerals and soils under simulated acid rain[J].Environmental Science,2004,25(4):117-122.
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