Investigation of a basic dye adsorption from aqueous solution onto raw and pre-treated bentonite surfaces

Eren, Erdal; Afsin, B.

doi:10.1016/j.dyepig.2006.08.019

Cited by 139 publications

(89 citation statements)

References 30 publications

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“…It is believed that the adsorption mechanism occured partly by ion exchange releasing exchangeable cations in the interlayer and basal plane surfaces and partly via non-columbic interactions between an adsorbed cation and a neutralized site. Similar behavior was observed by Eren and Afsin (2008) and Turabik (2008).…”

Section: Ajessupporting

confidence: 70%

Adsorption From Aqueous Solution Onto Natural and Acid Activated Bentonite

Al-Khatib

Fraige

Al-Hwaiti

et al. 2012

American Journal of Environmental Sciences

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Dyes have long been used in dyeing, paper and pulp, textiles, plastics, leather, paint, cosmetics and food industries. Nowadays, more than 100,000 commercial dyes are available with a total production of 700,000 tones manufactured all over the world annually. About 10-15% of dyes are being disposed off as a waste into the environment after dyeing process. This poses certain hazards and environmental problems. The objective of this study is to investigate the adsorption behavior of Methylene Blue (MB) from aqueous solution onto natural and acid activated Jordanian bentonite. Both bentonites are firstly characterized using XRD, FTIR and SEM techniques. Then batch adsorption experiments were conducted to investigate the effect of initial MB concentration, contact time, pH and temperature. It was found that the percentage of dye removal was improved from 75.8% for natural bentonite to reach 99.6% for acid treated bentonite. The rate of MB removal followed the pseudo second order model with a high correlation factor. The Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms. The Langmuir isotherm model was found more representative. The results indicate that bentonite could be employed as a low cost adsorbent in wastewater treatment for the removal of colour and dyes.

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Section: Ajessupporting

confidence: 70%

Adsorption From Aqueous Solution Onto Natural and Acid Activated Bentonite

Al-Khatib

Fraige

Al-Hwaiti

et al. 2012

American Journal of Environmental Sciences

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“…[1][2][3][4][5][6][7] Estes minerais são filossilicatos hidratados que, devido ao fenômeno de substituição isomórfica na sua estrutura cristalina lamelar, por exemplo, de Si +4 por Al +3 , apresentam cátions trocá-veis entre as lâminas e por isto possuem alta capacidade de troca catiônica (CTC). 8 Bentonitas 7 são argilas do grupo das montmorillonitas, que possuem como cátions de compensação Na + e Ca +2 .…”

Section: Introductionunclassified

Caracterização de argilas bentonitas e diatomitas e sua aplicação como adsorventes

et al. 2009

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Recebido em 23/9/08; aceito em 28/4/09; publicado na web em 6/10/09 BENTONITES AND DIATOMITES CLAYS CHARACTERIZATION AND APLICATION IN ADSORPTION. Five samples of natural clays denominated: diatomite, CN-20, CN-29, CN-40 and CN-45 from Aliança Latina LTDA were characterized by differents supplementary techniques such as: XRD, chemical analysis, adsorption N 2 measurements, infrared spectroscopy analysis, thermogravimetric analysis. Clays were tested in adsorption of blue methylene. All of isotherms adjust in a model of physics adsorption with formation of multilayers, however in the case of diatomite was a favorable adsorption (type II) and the CNs were a not favorable adsorption (type III). In the case of CNs had flocculation of clay in high concentration of coloring.

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“…Due to isomorphous substitution effect, Mt layers contain negative charges, which are counterbalanced by inorganic cations (e.g., Na + , Ca 2+ ) (Brigatti et al, 2006). These inorganic cations are exchangeable, making Mt efficient adsorbent for various cationic contaminants, such as heavy metals (Bailey et al, 1999;Bhattacharyya and Gupta, 2008;Krishna and Susmita, 2006), cationic dyes (Eren and Afsin, 2008;Gupta and Suhas, 2009;Rytwo and Ruiz-Hitzky, 2003), and cationic surfactants (Li and Rosen, 2000;Li et al, 2006;Ma and Zhu, 2007). After the adsorption of organic cations, interlayer space of Mt can change from hydrophilic to hydrophobic, and the resulting materials, also known as organoclays, have been used as efficient adsorbents for hydrophobic organic contaminants (HOC) (Chen et al, 2005;Ramesh et al, 2007;Rytwo and Gonen, 2006;Shen, 2002Shen, , 2004Zhu et al, 2007).…”

Section: Introductionmentioning

confidence: 99%