The removal of methylene blue dye from aqueous solutions using activated and non-activated bentonites

被引:35
作者
Al-Asheh, S [1 ]
Banat, F [1 ]
Abu-Aitah, L [1 ]
机构
[1] Jordan Univ Sci & Technol, Dept Chem Engn, Manassas, VA 22110 USA
关键词
D O I
10.1260/026361703769645780
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
An improvement in the adsorption capacity of naturally available bentonite towards water pollutants such as Methylene Blue dye (MBD) is certainly needed. For this purpose, sodium bentonite was activated by two methods: (1) treatment with sodium dodecyl sulphate (SDS) as an ionic surfactant and (2) thermal treatment in an oven operated at 850degreesC. Batch adsorption tests were carried out on removing MBD from aqueous solution using the above-mentioned bentonites. It was found that the effectiveness of bentonites towards MBD removal was in the following order: thermal-bentonite > SDS-bentonite > natural bentonite. X-Ray diffraction analysis showed that an increase in the microscopic bentonite platelets on treatment with SDS was the reason behind the higher uptake of MBD. An increase in sorbent concentration or initial pH value of the solutions resulted in a greater removal of MBD from the solution. An increase in temperature led to an increase in MBD uptake by the bentonites studied in this work. The Freundlich isotherm model was employed and found to represent the experimental data well.
引用
收藏
页码:451 / 462
页数:12
相关论文
共 21 条
[1]  
[Anonymous], 1999, TOXICOL ENVIRON CHEM, DOI [DOI 10.1080/02772249909358750, 10.1080/02772249909358750]
[2]   Adsorption of anionic dye and surfactant from water onto organomontmorillonite [J].
Bae, JH ;
Song, DI ;
Jeon, YW .
SEPARATION SCIENCE AND TECHNOLOGY, 2000, 35 (03) :353-365
[3]   PENTACHLOROPHENOL SORPTION BY ORGANO-CLAYS [J].
BOYD, SA ;
SHAOBAI, S ;
LEE, JF ;
MORTLAND, MM .
CLAYS AND CLAY MINERALS, 1988, 36 (02) :125-130
[4]   Langmuir isotherm models applied to the multicomponent sorption of acid dyes from effluent onto activated carbon [J].
Choy, KKH ;
Porter, JF ;
McKay, G .
JOURNAL OF CHEMICAL AND ENGINEERING DATA, 2000, 45 (04) :575-584
[5]   ADSORPTION MECHANISMS OF MONOBUTYLTIN IN CLAY-MINERALS [J].
HERMOSIN, MC ;
MARTIN, P ;
CORNEJO, J .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1993, 27 (12) :2606-2611
[6]  
IRENE M, 1996, J ENV ENG, V123, P25
[7]   Synthesis and characterization of Al-pillared and cationic surfactant modified Al-pillared Algerian bentonite [J].
Khalaf, H ;
Bouras, O ;
Perrichon, V .
MICROPOROUS MATERIALS, 1997, 8 (3-4) :141-150
[8]   Sorption of heavy-metal cations by Al and Zr-hydroxy-intercalated and pillared bentonite [J].
Matthes, W ;
Madsen, FT ;
Kahr, G .
CLAYS AND CLAY MINERALS, 1999, 47 (05) :617-629
[9]   ADSORPTION OF CHLORINATED PHENOLS FROM AQUEOUS-SOLUTION BY SURFACTANT-MODIFIED PILLARED CLAYS [J].
MICHOT, LJ ;
PINNAVAIA, TJ .
CLAYS AND CLAY MINERALS, 1991, 39 (06) :634-641
[10]  
Mishra G., 1993, COLOURAGE, P35