Effectiveness of Cupressus sempervirens cones as biosorbent for the removal of basic dyes from aqueous solutions in batch and dynamic modes

被引:70
作者
Fernandez, M. E. [2 ]
Nunell, G. V. [2 ]
Bonelli, P. R. [2 ]
Cukierman, A. L. [1 ,2 ]
机构
[1] Univ Buenos Aires, Fac Farm & Bioquim, Dept Tecnol Farmaceut, Catedra Farmacotecnia 2, RA-1113 Buenos Aires, DF, Argentina
[2] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Programa Invest & Desarrollo Fuentes Alternat Mat, Dept Ind, RA-1113 Buenos Aires, DF, Argentina
关键词
Cypress cone chips; Biosorption; Basic dyes; Textile wastewater treatment; Up-flow column; LOW-COST ADSORBENTS; TRACE TOXIC METALS; RHODAMINE-B; ACTIVATED CARBONS; METHYLENE-BLUE; WASTE-WATER; CONGO RED; ADSORPTION; BIOSORPTION; BIOMASS;
D O I
10.1016/j.biortech.2010.07.102
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
The feasibility of using cypress cone chips from Cupressus sempervirens as a low-cost biosorbent for the removal of two representative basic dyes, methylene blue (MB) and rhodamine B (RhB), from aqueous solutions was investigated in batch and continuous modes. Dyes biosorption was strongly dependent on the solution's pH. Sorption kinetics was determined and properly described by the pseudo-second-order rate model. Experimental equilibrium isotherms fitted the Langmuir model, showing maximum biosorption capacities of 0.62 mmol/g for MB and 0.24 mmol/g for RhB. Competitive experiments from a binary solution of the dyes demonstrated the preference of the cone chips for biosorbing MB. Very low desorption efficiencies were obtained for both dyes. Dynamic experiments showed that the breakthrough time was three times higher for MB biosorption than for RhB for the same conditions. Breakthrough curves were properly represented by a mathematical model. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码:9500 / 9507
页数:8
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