SYNTHESIS, CHARACTERIZATION, AND ADSORPTION KINETIC STUDIES OF ETHYLENEDIAMINE MODIFIED CELLULOSE FOR REMOVAL OF Cd AND Pb

被引:40
作者
Musyoka, Stephen Makali [2 ]
Ngila, Jane Catherine [1 ,2 ]
Moodley, Brenda [2 ]
Petrik, Lesley [1 ]
Kindness, Andrew [2 ]
机构
[1] Univ Johannesburg, Dept Chem Technol, ZA-2028 Johannesburg, South Africa
[2] Univ Kwazulu Natal, Sch Chem, Durban, South Africa
关键词
Adsorption kinetics; Ethylenediamine; Heavy metal removal; Langmuir isotherms; Modified cellulose; Surface functionalization; HEAVY-METAL IONS; WASTE-WATER; ABSORPTION; THERMODYNAMICS; EXTRACTANT; SORPTION; SAWDUST;
D O I
10.1080/00032719.2010.539736
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Surface functionalization of cellulose using ethylenediamine was performed to improve its binding capacity for Cd and Pb. Adsorption kinetics at pH 6.0 and 25 degrees C revealed the Langmuir model to better describe the binding phenomena based on linear regression correlation coefficient (R-2) values of 0.998 and 0.986 with adsorption capacities of 0.0136 and 0.0179 mmol g(-1) for Cd and Pb, respectively, using raw cellulose and 0.128 and 0.242 mmol g(-1) with ethylenediamine-modified cellulose. The Freundlich model gave binding capacities of 2.32 x 10(-3) and 2.08 x 10(-3) mmol g(-1) for Cd and Pb, with R-2 values of 0.979 and 0.942, respectively.
引用
收藏
页码:1925 / 1936
页数:12
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