Kinetics of Pollutant Sorption by Biosorbents: Review

Ho, Yuh‐Shan; Ng, Jack; McKay, Gordon

doi:10.1081/spm-100100009

Cited by 1,198 publications

(609 citation statements)

References 100 publications

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“…4139 The pseudo-first order kinetic equation is the most widely used rate equation for sorption of a solute from a liquid solution and may have been the first rate equation for the sorption in liquid/solid systems based on solid capacity (Ho et al 2000). The pseudo first order kinetic model was developed by Lagergren (1898) and is given as Eq.…”

Section: Fig 8b Temkin Isotherm For Khaya Ivorensismentioning

confidence: 99%

“…If the rate of sorption depends on a second order equation based on the sorbate uptake, the pseudosecond order chemisorption kinetics may be expressed as Eq. 14 (Ho et al 2000), (14) where k2s is the rate of sorption (g/mg min), qe is the amount of lead adsorbed onto activated sawdust at equilibrium (mg/g), and q is the amount of lead adsorbed at any time (mg/g). A plot of t/qt against t reveals a linear relationship whose intercept can be used to obtain the pseudo-second order rate constant.…”

Section: Fig 8b Temkin Isotherm For Khaya Ivorensismentioning

confidence: 99%

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Effect of Particle Size on the Sorption of Lead from Water by Different Species of Sawdust: Equilibrium and Kinetic Study

Nnaji

Emefu

2017

BioResources

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Both the effect of particle size and initial concentration on the adsorption of lead by sawdust of two timber species were investigated using batch experimental equilibrium and kinetic studies. A 100% lead removal efficiency was recorded for the optimum particle size of 1.18 mm for Pycnanthus angolensis and 0.85 mm for Khaya ivorensis at an initial lead concentration of 10 mg/L. Freundlich isotherm (0.83 ≤ R 2 ≤ 0.96 for Khaya ivorensis and 0.94 ≤ R 2 ≤ 1.0 for Pycnanthus angolensis) performed better than Langmuir and Temkin isotherms. The Dubinin-Radushkevich isotherm was used to ascertain the sorption mechanism. Mean sorption energy (12.48 kJ/mol for Pycnanthus angolensis and 13.42 kJ/mol for Khaya ivorensis) indicated that adsorption was by ion exchange. The pseudo-first order kinetic model (0.96 ≤ R 2 ≤ 1.0 for Khaya ivorensis and 0.90 ≤ R 2 ≤ 1.0 Pycnanthus angolensis) performed better than others with respect to R 2 values, while the intraparticle diffusion model performed better than the other kinetic models with respect to absolute mean error (AME).

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Section: Fig 8b Temkin Isotherm For Khaya Ivorensismentioning

confidence: 99%

Section: Fig 8b Temkin Isotherm For Khaya Ivorensismentioning

confidence: 99%

Effect of Particle Size on the Sorption of Lead from Water by Different Species of Sawdust: Equilibrium and Kinetic Study

Nnaji

Emefu

2017

BioResources

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“…The more usual kinetics reaction models are zero-order, first-order, pseudo-first -order, second-order, pseudo-second-order, reversible reaction models, third-order, LangmuirHinshelwood and Elovich models [11]. The pseudo-first-order Lagergren model [12] considers that the occupation rate of adsorption sites is proportional to the number of unoccupied sites [13]: t k e ads 1, e 1 q q (1) where q (mg g -1 ) is the amount of metal ion adsorbed at any given time t (min), q e (mg g -1 ) is the amount of metal ion adsorbed at equilibrium and k 1,ad (min -1 ) is the Lagergren rate constant.…”

Section: Reaction Modelsmentioning

confidence: 99%

“…According to Ho et al [11], a more appropriate quantitative approach to distinguishing between kinetic reaction and diffusion rate control is to perform the square root of contact time (root-t test) analysis, as proposed by Weber and Morris [16]:…”

Section: Diffusion Modelsmentioning

confidence: 99%

Removal of Cd(II), Zn(II) and Pb(II) from aqueous solutions by brown marine macro algae: Kinetic modelling

Freitas

Martins

Delerue–Matos

et al. 2008

Journal of Hazardous Materials

152

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Specific marine macro algae species abundant at the Portuguese coast (Laminaria hiperborea, Bifurcaria bifurcata, Sargassum muticum and Fucus spiralis) were shown to be effective for removing toxic metals (Cd(II), Zn(II) and Pb(II)) from aqueous solutions. The initial metal concentrations in solution were about 75-100 mg L -1 . The observed biosorption capacities for cadmium, zinc and lead ions were in the ranges of 23.9-39.5 mg g -1 , 18.6-32.0 mg g -1 and 32.3-50.4 mg g -1 , respectively. Kinetic studies revealed that the metal uptake rate was rather fast, with 75% of the total amount occurring in the first 10 min for all algal species.Experimental data were well fitted by a pseudo-second order rate equation. The contribution of internal diffusion mechanism was significant only to the initial biosorption stage. Results indicate that all the studied macro algae species can provide an efficient and cost-effective technology for eliminating heavy metals from industrial effluents.

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“…Among the conventional treatment options, adsorption processes are found to be an effective method, since it has high pollution removal capacity, having simple design and also being ease to operate and maintain in full-scale [2]. It has been reported in the literature that the performance of sorption processes relies on many factors, such as: the composition of the wastewater, physical-chemical properties, adsorbent mass, and operating conditions [3]. In principle, the pollutants in the liquid phase can be adsorbed on the activated carbon by physical sorption or chemical sorption or both.…”

Section: Introductionmentioning

confidence: 99%

Removal of Organic Pollutants from Industrial Cleaning Wastewaters Using a Combined Sedimentation and Packed-bed Column Treatment

Hogland¹,

Marques²,

Laohaprapanon³

et al. 2017

Eco-Tech

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In the present study, organic removal from five industrial cleaning wastewaters generated at a wood-laminate floor industry in Sweden was evaluated using a combined treatment process including sedimentation and a packed-bed column of commercial wood-based activated carbon (WAC). The supernatant obtained from the sedimentation was diluted with tap water until the COD concentration was reached 5 000 mg/L and it was continuously fed through the column by up-flow mode at a constant flow rate of 6 mL/min. The WAC performance at different bed height of 19, 38 and 57 cm was studied. The results showed that the sedimentation process removed about 20%, 24% and 24% of COD, TOC and BOD, respectively and the WAC column was effective in removing COD from the water phase. The treated wastewater volume and service time increased with the bed height increase. The column could treat 19 L of wastewater with the service time of 63.3 h and 30% breakthrough point. The experimental data fitted well with the bed depth-service time (BDTS) model. The increase of wastewater load on solid phase from 20%, 30%, 40% and 50% showed an increase of sorption capacity (N o ) and decrease of the rate constant (k).

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Kinetics of Pollutant Sorption by Biosorbents: Review

Cited by 1,198 publications

References 100 publications

Effect of Particle Size on the Sorption of Lead from Water by Different Species of Sawdust: Equilibrium and Kinetic Study

Effect of Particle Size on the Sorption of Lead from Water by Different Species of Sawdust: Equilibrium and Kinetic Study

Removal of Cd(II), Zn(II) and Pb(II) from aqueous solutions by brown marine macro algae: Kinetic modelling

Removal of Organic Pollutants from Industrial Cleaning Wastewaters Using a Combined Sedimentation and Packed-bed Column Treatment

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