Adsorption of nitrilotriacetic acid onto activated carbon prepared by steam pyrolysis of sawdust: Kinetic and isotherm studies

被引：19
作者：
Krishnan, K. Anoop [1 ]
机构：
[1] CSIR, NIIST, Trivandrum 695019, Kerala, India
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2008年 / 317卷 / 1-3期
关键词：
nitrilotriacetic acid; adsorption; activated carbon; sawdust; steam pyrolysis;
D O I：
10.1016/j.colsurfa.2007.11.002
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Nitrilotriacetic acid (NTA) adsorption onto sawdust activated carbon was studied. The adsorption process was highly pH dependent and has been explained on the basis of pH(zpc) and speciation of NTA in aqueous solution. In order to optimize the adsorption process, effect of pH, contact time, adsorbent dose, and ionic strength were studied using batch experiments. Equilibrium studies were per-formed to evaluate the adsorption capacity and adsorption energy of SDAC for the removal of NTA from aqueous phase. Langmuir model best describes the equilibrium adsorption data than Freundlich model. Ionic strength also played an important role in the process of adsorption and lower ionic strength favoured NTA adsorption. The mechanism of NTA adsorption onto SDAC was explained by inner sphere mechanism. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：344 / 351
页数：8
相关论文
共 29 条
[1]   The preparation of active carbons from coal by chemical and physical activation [J].
Ahmadpour, A ;
Do, DD .
CARBON, 1996, 34 (04) :471-479
[2]  
[Anonymous], B US DEP IND
[3]  
ASFOUR HM, 1985, J CHEM TECH BIOT A, V35, P28
[4]  
Bhatnagar A, 2006, INDIAN J CHEM TECHN, V13, P203
[5]   REMOVAL OF CADMIUM(II) BY LOW-COST ADSORBENTS [J].
BHATTACHARYA, AK ;
VENKOBACHAR, C .
JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE, 1984, 110 (01) :110-122
[6]   Adsorption kinetics of fluoride on iron(III)-zirconium(IV) hybrid oxide [J].
Biswas, Krishna ;
Bandhoyapadhyay, Durjoy ;
Ghosh, Uday Chand .
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY, 2007, 13 (01) :83-94
[7]   INTERACTIONS OF METAL HYDROUS OXIDES WITH CHELATING-AGENTS .3. ADSORPTION ON SPHERICAL COLLOIDAL HEMATITE PARTICLES [J].
CHANG, HC ;
HEALY, TW ;
MATIJEVIC, E .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1983, 92 (02) :469-478
[8]  
CHARRIER MJ, 1996, WATER RES, V30, P465
[9]   Modification in adsorption characteristics of activated carbon produced by H3PO4 under flowing gases [J].
Girgis, Badie S. ;
Attia, Amina A. ;
Fathy, Nady A. .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2007, 299 (1-3) :79-87
[10]   Effective uptake of decontaminating agent (citric acid) from aqueous solution by mesoporous and microporous materials: An adsorption process [J].
Gokulakrishnan, N ;
Pandurangan, A ;
Sinha, PK .
CHEMOSPHERE, 2006, 63 (03) :458-468
123