Removal capacity and adsorption mechanism of heat-treated palygorskite clay for methylene blue

Chen, Hao; Zhao, Jie; Zhong, Aiguo; Jin, Yiming

doi:10.1016/j.cej.2011.08.062

Cited by 185 publications

(76 citation statements)

References 46 publications

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“…The thermodynamic parameters including the change in free energy (ΔG°), change in enthalpy (ΔH°) and change in entropy (ΔS°), were calculated to investigate the thermodynamic behavior of the adsorption process [37]. The values of the thermodynamic parameters were computed from the plot of Ln Kd vs. 1/T (Equation (11)) using the experimental results obtained at different temperatures.…”

Section: Adsorption Thermodynamicsmentioning

confidence: 99%

Congo red removal by PANi/Bi2WO6 nanocomposites: Kinetic, equilibrium and thermodynamic studies

Laabd

Ahsaine

Jaouhari

et al. 2016

Journal of Environmental Chemical Engineering

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Section: Adsorption Thermodynamicsmentioning

confidence: 99%

Congo red removal by PANi/Bi2WO6 nanocomposites: Kinetic, equilibrium and thermodynamic studies

Laabd

Ahsaine

Jaouhari

et al. 2016

Journal of Environmental Chemical Engineering

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“…Chen et al . modified PAL by a heat treatment process to improve its adsorption capacity for dyes27. Frini-Srasra and Srasraa reported by using acid activation method to improve the adsorption capability of PAL to Cd(II)28.…”

mentioning

confidence: 99%

All-into-one strategy to synthesize mesoporous hybrid silicate microspheres from naturally rich red palygorskite clay as high-efficient adsorbents

Wang

Tian

Wang

et al. 2016

Sci Rep

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A mesoporous hybrid silicate microsphere with superior adsorption performance has been successfully synthesized by employing an “all-into-one” strategy and a simple one-pot hydrothermal process using naturally abundant low-grade red palygorskite (PAL) clay as raw material in the presence of non-toxic SiO32− and Mg2+ ions. As is expected, both the PAL and associated minerals transformed into a new amorphous mesoporous hybrid silicate microsphere without using any additional pore-forming template. The mesoporous silicate microsphere shows a large pore size of 37.74 nm, high specific surface area of 489.81 m2/g (only 54.67 m2/g for raw PAL) and negative surface potential of −43.3 mV, and its maximum adsorption capabilities for Methylene bule (MB) and Crystal violet (CV) reach 407.95 mg/g and 397.22 mg/g, respectively. Meanwhile, 99.8% of MB (only 53% for raw PAL) and 99.7% of CV (only 43% for raw PAL) were sucessfully removed from 200 mg/L of initial dye solution by only using 1 g/L of the adsorbent. In addition, the spent adsorbent can be easily regenerated and repeatly reused for muptiple cycles. The study on adsorption mechanism revealed that electrostatic attraction, hydrogen bonding and chemical complexing interactions are the main factors contributed to the high dye adsorption.

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“…pH of the dye solution is the important factor affecting adsorption properties of clay minerals [4,23]. Fig.…”

Section: Effect Of Phmentioning

confidence: 99%

“…Clay minerals as potential adsorbents for dye wastewater treatment, have long been a focus of attention [1][2][3][4]. Among of the natural clay minerals, halloysite is a kind of inorganic mineral material possessing unique hollow tubular structure, generally referred to as the halloysite nanotubes (HNTs).…”

Section: Introductionmentioning

confidence: 99%

Trapping characteristic of halloysite lumen for methyl orange

Chen

Yan

Pei

et al. 2015

Applied Surface Science

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Removal capacity and adsorption mechanism of heat-treated palygorskite clay for methylene blue

Cited by 185 publications

References 46 publications

Congo red removal by PANi/Bi2WO6 nanocomposites: Kinetic, equilibrium and thermodynamic studies

Congo red removal by PANi/Bi2WO6 nanocomposites: Kinetic, equilibrium and thermodynamic studies

All-into-one strategy to synthesize mesoporous hybrid silicate microspheres from naturally rich red palygorskite clay as high-efficient adsorbents

Trapping characteristic of halloysite lumen for methyl orange

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