Adsorption studies of a water soluble dye, Reactive Red MF-3B, using sonication-surfactant-modified attapulgite clay

Huang, Jianhua; Liu, Yuanfa; Jin, Qingzhe; Wang, Xingguo; Yang, Jun

doi:10.1016/j.jhazmat.2006.09.088

Cited by 215 publications

(72 citation statements)

References 37 publications

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“…tive red onto sonication-surfactant-modified attapulgite clay (Huang 2007). In general, before the equilibrium time, the increase in PC adsorption owing to the increase of temperature showed a kinetically controlling process.…”

Section: Effect Of Initial Adsorbate Concentration Contact Time and mentioning

confidence: 92%

Adsorption of Polycarboxylate-based Superplasticizer onto Natural Bentonite

Wang

Zheng

Feng³

et al. 2012

ACT

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The adsorption of polycarboxylate-based superplasticizer onto natural bentonite was investigated in aqueous solution using a batch technique with respect to initial adsorbate concentration, contact time, temperature, pH value and ionic strength. Lower pH value and higher ionic strength were proved to be favorable for the adsorption. The pseudo-first-order, pseudo-second-order and intraparticle diffusion models were used to describe the kinetic data and the kinetic constants were also determined. The experimental data fitted the pseudo-second-order model well. The Langmuir, Freundlich and Dubinin-Radushkevich (D-R) equations were applied to describe the equilibrium isotherm and the isotherm constants were also evaluated. The langmuir model agreed with the experimental well. Thermodynamic parameters ( Δ G 0 , Δ H 0 and Δ S 0 ) indicated that the adsorption was endothermic and physical in nature.

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Section: Effect Of Initial Adsorbate Concentration Contact Time and mentioning

confidence: 92%

Adsorption of Polycarboxylate-based Superplasticizer onto Natural Bentonite

Wang

Zheng

Feng³

et al. 2012

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“…So, it can be modified by organic cations such as quaternary ammonium compounds by ion exchange reaction. Huang et al (2007) have studied adsorption of a water soluble dye, Reactive Red MF-3B, using octodecyl trimethyl ammonium chloride modified attapulgite clay and found that, the surfactantmodified clay could be a good adsorbent for treating Reactive Red MF-3B-contaminated waters. Despite the fact that surfactant-modified attapulgite clay has been reported to select as adsorbent for the removal of anions dye reactive red MF-3B, there have been no studies on adsorption characteristic of organo-attapulgite modified by hexadecyltrimethylammonium bromide (HTMAB) for anionic dyes such as a common one, Congo red.…”

Section: Introductionmentioning

confidence: 99%

Adsorption study for removal of Congo red anionic dye using organo-attapulgite

2009

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The organo-attapulgite was prepared using hexadecyltrimethylammonium bromide (HTMAB) with equation equivalent ratio of HTMAB to CEC of attapulgite added and then used as adsorbent for the removal of Congo red (CR) anionic dye from aqueous solution. Adsorbent characterizations were investigated using infrared spectroscopy and X-ray diffraction. The effects of contact time, temperature, pH and initial dye concentration on organo-attapulgite adsorption for CR were investigated. The results show that the amount adsorbed of CR on the organo-attapulgite increase with increasing dye concentration, temperature, and by decreasing pH. The adsorption kinetics was studied with the pseudo-first-order, pseudo-second-order and intraparticle diffusion models, and the rate constants were evaluated. It was found that the adsorption mechanisms in the dye/organo-attapulgite system follow pseudo-second-order kinetics with a significant contribution of film diffusion. Equilibrium data fitted perfectly with Langmuir isotherm model compared to Freundlich isotherm model, and the maximum adsorption capacity was 189.39 mg g −1 for the adsorbent. Kinetic and desorption studies both suggest that chemisorption should be the major mode of CR removal by the organo-attapulgite. The results indicate that HTMABmodified attapulgite could be employed as low-cost material for the removal of Congo red anionic dye from wastewater.

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“…22 Similar results were reported for the adsorption of CR on clay 23,24 and organoclay. 25 However, compared with OMMT, the adsorption capacity of CTS/OMMT showed a different trend between 30 and 50…”

Section: Effect Of Temperature On Adsorptionmentioning

confidence: 95%

Removal of Congo red from aqueous solution using a chitosan/organo‐ montmorillonite nanocomposite

Wang

2007

J of Chemical Tech & Biotech

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. The adsorption behaviours of OMMT and CTS/OMMT showed that the adsorption kinetics and isotherms were in good agreement with a pseudo-second-order equation and the Langmuir equation, respectively. The IR spectra revealed that a chemical interaction occurred between CTS/OMMT and CR. The adsorption capacity of CTS/OMMT nanocomposite was higher than that of other absorbents; this study suggested that the CTS/OMMT nanocomposite could be used as an adsorbent to remove CR dye from aqueous solution.

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Adsorption studies of a water soluble dye, Reactive Red MF-3B, using sonication-surfactant-modified attapulgite clay

Cited by 215 publications

References 37 publications

Adsorption of Polycarboxylate-based Superplasticizer onto Natural Bentonite

Adsorption of Polycarboxylate-based Superplasticizer onto Natural Bentonite

Adsorption study for removal of Congo red anionic dye using organo-attapulgite

Removal of Congo red from aqueous solution using a chitosan/organo‐ montmorillonite nanocomposite

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