Adsorption of Cr(III) from wastewater by wine processing waste sludge

Li, Yuan-shen; Liu, Cheng‐Chung; Chiou, Chyow-San

doi:10.1016/j.jcis.2003.12.051

Cited by 77 publications

(39 citation statements)

References 16 publications

(17 reference statements)

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“…The hydroxyl (R-OH) group can serve as both coordination and electrostatic interaction sites to adsorb heavy metals. The adsorption mechanism can be expressed as following [32]:…”

Section: Characterization Of Vpwmentioning

confidence: 99%

Biosorption of Cr(III) from solutions using vineyard pruning waste

Karaoğlu

Zor

Uğurlu

2010

Chemical Engineering Journal

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“…The hydroxyl (R-OH) group can serve as both coordination and electrostatic interaction sites to adsorb heavy metals. The adsorption mechanism can be expressed as following [32]:…”

Section: Characterization Of Vpwmentioning

confidence: 99%

Biosorption of Cr(III) from solutions using vineyard pruning waste

Karaoğlu

Zor

Uğurlu

2010

Chemical Engineering Journal

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“…[3,7,8]. However, only a small amount of research has reported Cr(III) removal using the activated sludge biosorbent [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, different pretreatment methods may vary in effect on biosorption characteristics of biomass. For example, Li et al [10] reported that the adsorption of Cr(III) onto wine processing waste sludge dried at 100°C for 24 h was an exothermic physical process, while Iddoua and Ouali [9] reported that the adsorption was an endothermic process when removing Cr(III) by waste-activated sludge collected from drying beds.…”

Section: Introductionmentioning

confidence: 99%

Biosorption of Cr(III) from aqueous solution by freeze-dried activated sludge: Equilibrium, kinetic and thermodynamic studies

Yao

Zhang

et al. 2010

Front. Environ. Sci. Eng. China

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Batch biosorption experiments were conducted to remove Cr(III) from aqueous solutions using activated sludge from a sewage treatment plant. An investigation was conducted on the effects of the initial pH, contact time, temperature, and initial Cr(III) concentration in the biosorption process. The results revealed that the activated sludge exhibited the highest Cr(III) uptake capacity (120 mg%g -1 ) at 45°C, initial pH of 4, and initial Cr(III) concentration of 100 mg%L -1 . The biosorption results obtained at various temperatures showed that the biosorption pattern accurately followed the Langmuir model. The calculated thermodynamic parameters, ΔG o ( -0.8--4.58 kJ%mol -1 ), ΔH o (15.6-44.4 kJ%mol -1 ), and ΔS o (0.06-0.15 kJ%mol -1 %K -1 ) clearly indicated that the biosorption process was feasible, spontaneous, endothermic, and physical. The pseudo first-order and second-order kinetic models were adopted to describe the experimental data, which revealed that the Cr(III) biosorption process conformed to the second-order rate expression and the biosorption rate constants decreased with increasing Cr (III) concentration. The analysis of the values of biosorption activation energy (E a = -7 kJ%mol -1 ) and the intraparticle diffusion model demonstrated that Cr(III) biosorption was film-diffusion-controlled.

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“…The results assumes that there is no interaction among the adsorbate molecules and that the adsorbed Pb(II), Cd(II) and Cr(III) are localized in a monolayer. The slope 1/n ranging between 0 and 1 is a measure of adsorption intensity or surface heterogeneity, becoming more heterogeneous as its value gets closer to 0 [35,36]. The calculated 1/n values indicate that Pb(II), Cd(II) and Cr(III) molecules are favorably adsorbed by magnetic ChNTs at all temperatures.…”

Section: Effect Of Temperature and Thermodynamic Studymentioning

confidence: 95%