羧基改性酵母对锰的吸附性能与机理研究
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摘要
以啤酒废酵母(YB)作为原料,通过酯化反应将含2个羧基的柠檬酸嫁接到酵母表面,通过一系列静态批次实验、表征分析等手段,研究羧基改性酵母(CA-YB)对Mn~(2+)的吸附性能和吸附机理。结果表明,Langmuir模型能较好地拟合YB及CA-YB对Mn~(2+)的吸附等温线,在30℃、pH=6时,YB及CA-YB对锰的最大吸附量分别为47.7、105.0 mg/L;YB、CA-YB对Mn~(2+)的吸附较符合准一阶动力学模型;吸附反应机理主要为CA-YB表面的—COO-与Mn~(2+)离子之间的静电吸附。作为一种廉价高效亲环境的吸附材料,在锰的去除与回收方面具有潜在的应用可能。
Citric acid containing three carboxyl groups was grafted onto the surface of the waste brewer's yeast biomass(YB),which was chosen as a low cost raw material,through esterification reaction.After a series of batch experiments and characteristic analysis,the adsorption performance and adsorption mechanism of citric acid modified yeast biomass(CY-YB)onto Mn~(2+)were studied.The results indicated that the Langmuir model described the adsorption isotherm data better with the maximum Mn~(2+)adsorption capacity of 47.7 mg/L and 105.0 mg/L onto YB and CA-YB,respectively,at 30 ℃ and pH=6.The kinetic data was fitted better by the pseudo-first-order model with higher R~2 value.Moreover,the adsorption mechanism was verified to be the electrostatic adsorption between —COO-on the surface of CA-YB and Mn~(2+)ions.CA-YB as a lowcost,good performance and eco-friendly adsorbent showed a promising potential in the further application of removal and recovery of manganese from aqueous solution.
Citric acid containing three carboxyl groups was grafted onto the surface of the waste brewer's yeast biomass(YB),which was chosen as a low cost raw material,through esterification reaction.After a series of batch experiments and characteristic analysis,the adsorption performance and adsorption mechanism of citric acid modified yeast biomass(CY-YB)onto Mn~(2+)were studied.The results indicated that the Langmuir model described the adsorption isotherm data better with the maximum Mn~(2+)adsorption capacity of 47.7 mg/L and 105.0 mg/L onto YB and CA-YB,respectively,at 30 ℃ and pH=6.The kinetic data was fitted better by the pseudo-first-order model with higher R~2 value.Moreover,the adsorption mechanism was verified to be the electrostatic adsorption between —COO-on the surface of CA-YB and Mn~(2+)ions.CA-YB as a lowcost,good performance and eco-friendly adsorbent showed a promising potential in the further application of removal and recovery of manganese from aqueous solution.
引文
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[3]于晓丹,吴哲坤.工业废水中重金属的去除技术研究进展[J].中国资源综合利用,2016(11):46-48.Yu Xiaodan,Wu Zhekun.Review of the technologies of heavy metal removal from industrial wastewater[J].China Resources Comprehensive Utilization,2016(11):46-48.
[4]王彧.重金属废水治理方法的研究进展[J].山西建筑,2016(24):189-190.Wang Yu.Review of treatment method of heavy metal wastewater[J].Shanxi Architecture,2016(24):189-190.
[5]Zhang W,Meng L,Mu G,et al.A facile strategy for fabrication of nano-ZnO/yeast composites and their adsorption mechanism towards lead(Ⅱ)ions[J].Applied Surface Science,2016,378:196-206.
[6]Lim S,Zheng Y,Zou S,et al.Characterization of copper adsorption onto an alginate encapsulated magnetic sorbent by a combined FT-IR,XPS,and mathematical modeling study[J].Environmental Science and Technology,2008,42(7):2551-2556.
[7]Ferreira B C S,Teodoro F S,Mageste A B,et al.Application of a new carboxylate-functionalized sugarcane bagasse for adsorptive removal of crystal violet from aqueous solution:Kinetic,equilibrium and thermodynamic studies[J].Industrial Crops&Products,2015,65:521-534.
[8]Sheshmani S,Nematzadeh M A,Shokrollahzadeh S,et al.Preparation of graphene oxide/chitosan/FeOOH nanocomposite for the removal of Pb(Ⅱ)from aqueous solution[J].International Journal of Biological Macromolecules,2015,80:475-800.
[9]Zou Weihua,Han Runping,Chen Zongzhang,et al.Characterization and properties of manganese oxide coated zeolite as adsorbent for removal of copper(Ⅱ)and lead(Ⅱ)ions from solution[J].Journal of Chemical&Engineering Data,2010,51(2):534-541.
[10]Zhang X,Liu J,Liu J.Active Carbon Fibers Grown with manganese dioxide nanowires for highly-efficient adsorption of organic pollutants from acidic and neutral aqueous solutions[J].Nanoscience&Nanotechnology Letters,2014,6(5):2082-2086.
[11]Ahimou F,Boonaert C J P,Adriaensen Y,et al.XPS analysis of chemical functions at the surface of Bacillus subtilis[J].Journal of Colloid and Interface Science,2007,309(1):49-55.
[12]葛凤.酿酒废酵母吸附城市污水中低浓度重金属离子机理研究[D].乌鲁木齐:新疆农业大学,2012.Ge Feng.Mechanism of Adsorption Heavy Metal Ions from Low Concentration Municipal Sewage Using Brewer's Yeast[D].Urumuqi:Xinjiang Agricultural University,2012.
[13]Bian J,Zhang S,Zhang J,et al.Supported manganese dioxide catalyst for seawater flue gas desulfurization application[J].Advanced Materials Research,2012,236/237/238(5):964-967.
[14]Xia Y,Meng L,Jiang Y,et al.Facile preparation of MnO2functionalized baker’s yeast composites and their adsorption mechanism for cadmium[J].Chemical Engineering Journal,2015,259:927-935.
[15]Vieira R S,Oliveira M L M,Guibal E,et al.Copper,mercury and chromium adsorption on natural and crosslinked chitosan films:an XPS investigation of mechanism[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2011,374(1/2/3):108-114.
[16]He J,Chen J P.Cu(Ⅱ)-imprinted poly(vinyl alcohol)/poly(acrylic acid)membrane for greater enhancement in sequestration of copper ion in the presence of competitive heavy metal ions:material development,process demonstration,and study of mechanisms[J].Industrial&Engineering Chemistry Research,2017,53(52):20223-20233.
[17]Ramrakhiani L,Halder A,Majumder A,et al.Industrial waste derived biosorbent for toxic metal remediation:mechanism studies and spent biosorbent management[J].Chemical Engineering Journal,2017,308:1048-1064.
[18]Ravishankar H,Wang J,Shu L,et al.Removal of Pb(Ⅱ)ions using polymer based graphene oxide magnetic nanosorbent[J].Process Safety&Environmental Protection,2016,104:472-480.
[19]Cheng Y,Huang T,Sun Y,et al.Catalytic oxidation removal of ammonium from groundwater by manganese oxides filter:performance and mechanisms[J].Chemical Engineering Journal,2017,322:82-89.