PMID- 19631461
OWN - NLM
STAT- MEDLINE
DCOM- 20100112
LR  - 20091012
IS  - 1873-3336 (Electronic)
IS  - 0304-3894 (Linking)
VI  - 172
IP  - 1
DP  - 2009 Dec 15
TI  - Adsorption kinetics and isotherm of anionic dyes onto organo-bentonite from 
      single and multisolute systems.
PG  - 99-107
LID - 10.1016/j.jhazmat.2009.06.139 [doi]
AB  - The performances of polydiallydimethylammonium modified bentonite 
      (PDADMA-bentonite) as an adsorbent to remove anionic dyes, namely Acid Scarlet GR 
      (AS-GR), Acid Turquoise Blue 2G (ATB-2G) and Indigo Carmine (IC), were 
      investigated in single, binary and ternary dye systems. In adsorption from single 
      dye solutions with initial concentration of 100 micromol/L, the dosage of 
      PDADMA-bentonite needed to remove 95% dye was 0.42, 0.68 and 0.75 g/L for AS-GR, 
      ATB-2G and IC, respectively. The adsorption isotherms of the three dyes obeyed 
      the Langmuir isotherm model with the equilibrium constants of 0.372, 0.629 and 
      4.31 L/micromol, the saturation adsorption amount of 176.3, 149.2 and 228.7 
      micromol/g for ATB-2G, IC and AS-GR, respectively. In adsorption from mixed dye 
      solutions, the isotherm of each individual dye followed an expanded Langmuir 
      isotherm model and the relationship between the total amount of dyes adsorbed and 
      the total equilibrium dye concentration was interpreted well by Langmuir isotherm 
      model. In the region of insufficient dosage of PDADMA-bentonite, the dye with a 
      larger affinity was preferentially removed by adsorption. Desorption was observed 
      in the kinetic curve of the dye with lower affinity on PDADMA-bentonite surface 
      by the competitive adsorption. The kinetics in single dye solution and the total 
      adsorption of dyes in binary and ternary dye systems nicely followed 
      pseudo-second-order kinetic model.
FAU - Shen, Dazhong
AU  - Shen D
AD  - School of Chemistry, Chemical Engineering and Material Science, Shandong Normal 
      University, Jinan 250014, PR China. dzshen@sdnu.edu.cn
FAU - Fan, Jianxin
AU  - Fan J
FAU - Zhou, Weizhi
AU  - Zhou W
FAU - Gao, Baoyu
AU  - Gao B
FAU - Yue, Qinyan
AU  - Yue Q
FAU - Kang, Qi
AU  - Kang Q
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20090703
PL  - Netherlands
TA  - J Hazard Mater
JT  - Journal of hazardous materials
JID - 9422688
RN  - 0 (Coloring Agents)
RN  - 0 (Electrolytes)
RN  - 0 (Polyethylenes)
RN  - 0 (Quaternary Ammonium Compounds)
RN  - 0 (Solutions)
RN  - 0 (Water Pollutants, Chemical)
RN  - 1302-78-9 (Bentonite)
RN  - 26062-79-3 (poly-N,N-dimethyl-N,N-diallylammonium chloride)
SB  - IM
MH  - Adsorption
MH  - Bentonite/*chemistry
MH  - Chemistry, Organic/*methods
MH  - Coloring Agents/*chemistry
MH  - Electrolytes
MH  - Hydrogen-Ion Concentration
MH  - Kinetics
MH  - Models, Chemical
MH  - Polyethylenes/chemistry
MH  - Quaternary Ammonium Compounds/chemistry
MH  - Regression Analysis
MH  - Solutions
MH  - Water Pollutants, Chemical/analysis
MH  - Water Purification/*methods
MH  - X-Ray Diffraction
EDAT- 2009/07/28 09:00
MHDA- 2010/01/13 06:00
CRDT- 2009/07/28 09:00
PHST- 2008/09/12 00:00 [received]
PHST- 2009/06/23 00:00 [revised]
PHST- 2009/06/24 00:00 [accepted]
PHST- 2009/07/28 09:00 [entrez]
PHST- 2009/07/28 09:00 [pubmed]
PHST- 2010/01/13 06:00 [medline]
AID - S0304-3894(09)01085-1 [pii]
AID - 10.1016/j.jhazmat.2009.06.139 [doi]
PST - ppublish
SO  - J Hazard Mater. 2009 Dec 15;172(1):99-107. doi: 10.1016/j.jhazmat.2009.06.139. 
      Epub 2009 Jul 3.