Adsorption of water-soluble dyes onto modified resin

Yu, Ying; Zhuang, Yanpei; Wang, Zhonghua; Qiu, Mingqiang

doi:10.1016/s0045-6535(03)00654-4

Cited by 159 publications

(60 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…DG h was negative at all temperatures (Table 3), confirming that the sorption of diesel oil onto loess soils was spontaneous and thermodynamically favorable. Generally, DG h ranges from 0 to -20 kJ mol -1 in physical adsorption and from -80 to -400 kJ mol -1 in chemical adsorption (Yu et al 2004). In this study, DG h ranged from -1.01 to -5.76 kJ mol -1 , which indicated mainly physical adsorption.…”

Section: Analysis Of Thermodynamic Parametersmentioning

confidence: 46%

Impact of biochar produced from post-harvest residue on the adsorption behavior of diesel oil on loess soil

Jiang

Sun

Uwamungu

et al. 2015

Environ Geochem Health

View full text Add to dashboard Cite

The primary objective of this study was to investigate the effect of biochar, produced from wheat residue at different temperatures, on the adsorption of diesel oil by loess soil. Kinetic and equilibrium data were processed to understand the adsorption mechanism of diesel by biochar-affected loess soil; dynamic and thermodynamic adsorption experiments were conducted to characterize this adsorption. The surface features and chemical structure of biochar, modified at varying pyrolytic temperatures, were investigated using surface scanning electron microscopy and Fourier transform infrared analysis. The kinetic data showed that the adsorption of diesel oil onto loess soil could be described by a pseudo-second-order kinetic model, with the rate-controlling step being intraparticle diffusion. However, in the presence of biochar, boundary layer control and intraparticle diffusion were both involved in the adsorption. Besides, the adsorption equilibrium data were well described by the Freundlich isothermal model. The saturated adsorption capacity weakened as temperature increased, suggesting a spontaneous exothermic process. Thermodynamic parameter analysis showed that adsorption was mainly a physical process and was enhanced by chemical adsorption. The adsorption capacity of loess soil for diesel oil was weakened with increasing pH. The biochar produced by pyrolytic wheat residue increased the adsorption behavior of petroleum pollutants in loess soil.

show abstract

Section: Analysis Of Thermodynamic Parametersmentioning

confidence: 46%

Impact of biochar produced from post-harvest residue on the adsorption behavior of diesel oil on loess soil

Jiang

Sun

Uwamungu

et al. 2015

Environ Geochem Health

View full text Add to dashboard Cite

show abstract

“…[21][22][23][24][25] Even so, the scientific literature contains some valuable information about the applicability of ion-exchange resins in the removal of dyes from aqueous solutions, probably because of their advantages related to ease of use in dynamic systems with increased adsorption efficiency, the possibility of using them in several consecutive adsorption-desorption cycles, and their high performance in terms of degree of discoloration and treatment of aqueous effluents. [26][27][28] The major advantages outweigh the high cost of the synthetic resins involved.…”

Section: Introductionmentioning

confidence: 99%

Macroporous polymeric ion exchangers as adsorbents for the removal of cationic dye basic blue 9 from aqueous solutions

Șuteu

Bı̂lbă

Coseri

2013

J of Applied Polymer Sci

View full text Add to dashboard Cite

Two macroporous cation-exchange resins, Purolite C145, a strongly acidic cation macroporous resin, and Purolite C107E, a weakly acidic cation-exchange resin, were used to remove the dye Basic Blue 9 (BB9) from an aqueous medium. Batch adsorption experiments were carried out to analyze the effect of various parameters, such as the phase contact time, initial dye concentration, initial solution pH, resin dose, and temperature. The experimental equilibrium data were evaluated by the Langmuir, Freundlich, and Dubinin-Radushkevich (DR) adsorption models. The Freundlich model better described the adsorption processes of the BB9 dye onto both cation exchangers, and the monolayer adsorption capacities were established as 31.9846 mg/g (C145) and 27.77 mg/g (C107E) at 20C. The values of the mean free adsorption energy (E) obtained from the DR model suggested a porous structure of the adsorbents and proposed ion exchange at the main mechanism of the adsorption process. The values of the thermodynamic parameters showed that the retention of the cationic dye was a spontaneous and endothermic process. Environmental scanning electron microscopy and Fourier transform infrared spectroscopy were used to characterize the sorbent and also to validate the adsorption mechanism as ion-exchange ones. The desorption experiments by a batch method were performed with different solutions: 0.1 and 1 mol/L HCl, 2.5 mol/L H 2 SO 4 , CH 3 OH, and a mixture between 1 mol/L HCl and CH 3 OH. Desorption performed with sulfuric acid was shown to be most effective because more than 85% of the adsorbed dye was removed. V C 2013 Wiley Periodicals, Inc. J. Appl.Polym. Sci. 2014, 131, 39620.

show abstract

“…The calculated changes in Enthalpy (∆H adsorption [7]. The positive value of ∆H θ suggests the endothermic nature of adsorption.…”

Section: Analysis Of Thermodynamic Parametersmentioning

confidence: 98%

Adsorption Kinetics, Equilibrium and Thermodynamics of Naphthalene onto Loess Soil

Jiang¹,

Yuan²,

Hu³

et al. 2017

dteees

View full text Add to dashboard Cite

Abstract. Adsorption behavior of naphthalene onto loess soil was investigated based on adsorption kinetic and adsorption isothermal experiments. The saturated adsorption capacity of naphthalene onto soil from Lanzhou (LZ) was higher than those onto loess soil from Jiayuguan (JYG). The soil properties have an obvious influence on adsorption of naphthalene on loess soil. The naphthalene adsorption equilibrium was reached within 24h, and the adsorption kinetics was well described by the pseudo-second-order model, and also followed the intraparticle diffusion model. The adsorption processes were controlled by the external liquid film diffusion, surface adsorption, intra-particle diffusion, etc. Besides, the adsorption equilibrium data were fitted well with the Henry and Freundlich isothermal model. The saturated adsorption capacity was weakened with the decrease of temperature, suggesting a spontaneous endothermic process. The results of thermodynamic parameters analysis showed the adsorption was mainly a physical process and was enhanced by chemical adsorption.

show abstract

Adsorption of water-soluble dyes onto modified resin

Cited by 159 publications

References 12 publications

Impact of biochar produced from post-harvest residue on the adsorption behavior of diesel oil on loess soil

Impact of biochar produced from post-harvest residue on the adsorption behavior of diesel oil on loess soil

Macroporous polymeric ion exchangers as adsorbents for the removal of cationic dye basic blue 9 from aqueous solutions

Adsorption Kinetics, Equilibrium and Thermodynamics of Naphthalene onto Loess Soil

Contact Info

Product

Resources

About