Adsorptive removal of phenol and aniline by modified bentonite: adsorption isotherm and kinetics study

Organically modified bentonite was prepared by using hexadecyl trimethyl ammonium bromide (HDTMA) under ultrasonic conditions in this experiment. The modified bentonite was used to treat the acid brilliant scarlet GR and the adsorption behavior was investigated. The results indicated that the adsorption isotherm data were well fit for the Langmuir isotherm model and the pseudo two-order adsorption kinetics equation has the highest goodness of fit and the best linear correlation.

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Adsorptive removal of silver nanoparticles (SNPs) from aqueous solution by Aeromonas punctata and its adsorption isotherm and kinetics

Colloids and Surfaces B Biointerfaces ◽

10.1016/j.colsurfb.2011.11.032 ◽

2012 ◽

Vol 92 ◽

pp. 156-160 ◽

Cited By ~ 36

Author(s):

S. Sudheer Khan ◽

Amitava Mukherjee ◽

N. Chandrasekaran

Keyword(s):

Aqueous Solution ◽

Silver Nanoparticles ◽

Adsorption Isotherm ◽

Adsorptive Removal

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Adsorptive Removal of Catechol on Waste Fe(III)/Cr(III) Hydroxide: Equilibrium and Kinetics Study

Industrial & Engineering Chemistry Research ◽

10.1021/ie0496636 ◽

2004 ◽

Vol 43 (23) ◽

pp. 7581-7587 ◽

Cited By ~ 26

Author(s):

C. Namasivayam ◽

S. Sumithra

Keyword(s):

Kinetics Study ◽

Adsorptive Removal ◽

Equilibrium And Kinetics

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RSM optimized adsorptive removal of erythromycin using magnetic activated carbon: Adsorption isotherm, kinetic modeling and thermodynamic studies

Sustainable Chemistry and Pharmacy ◽

10.1016/j.scp.2020.100309 ◽

2020 ◽

Vol 17 ◽

pp. 100309 ◽

Cited By ~ 1

Author(s):

Soheila Gholamiyan ◽

Majid Hamzehloo ◽

Abdolhadi Farrokhnia

Keyword(s):

Activated Carbon ◽

Adsorption Isotherm ◽

Kinetic Modeling ◽

Activated Carbon Adsorption ◽

Thermodynamic Studies ◽

Adsorptive Removal ◽

Magnetic Activated Carbon ◽

Carbon Adsorption

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Simultaneous sorption of As, B, Cr, Mo and Se from coal fly ash leachates by Al3+-pillared bentonite clay: implication for the construction of activated geo-synthetic clay liner

Water Practice & Technology ◽

10.2166/wpt.2017.023 ◽

2017 ◽

Vol 12 (1) ◽

pp. 186-201 ◽

Cited By ~ 1

Author(s):

Vhahangwele Masindi ◽

W. Mugera Gitari ◽

Hlanganani Tutu

Keyword(s):

Fly Ash ◽

Adsorption Isotherm ◽

Coal Fly Ash ◽

Bentonite Clay ◽

Order Kinetic ◽

Modified Bentonite ◽

Adsorption Affinity ◽

Freundlich Adsorption Isotherm ◽

Order Kinetic Model ◽

Pseudo Second Order

The present study reports the optimum conditions for intercalating the Al3+ species to bentonite clay matrices and evaluate the potential of using Al3+-modified bentonite clay (Alum-Bent) for removal of oxyanionic species of As, B, Cr, Mo and Se from coal fly ash (FA) leachates. Removal of oxyanionic species was done in batch experimental procedures. Parameters optimized were: contact time, adsorbent dosage, concentration and pH. The adsorption affinity of Al3+-bentonite clay for oxyanionic species varied as follows: B ≈ Se > Mo > Cr ≈ As respectively. The adsorption data fitted better to Langmuir adsorption isotherm than Freundlich adsorption isotherm hence confirming mono-site adsorption. The adsorption kinetics fitted well pseudo-second-order kinetic model hence confirming chemisorption. The fact that most of the oxyanion were adsorbed at pH ≥ pHpzc indicated that both electrostatic and chemical interactions occurred with the clay surface and interlayers. The Al3+-modified bentonite clay successfully removed oxyanion species from generated coal FA leachates. This study shows that Al3+-modified bentonite clay is an effective adsorbent for oxyanion species in coal FA leachates and could be applied as a reactive barrier in coal FA retention ponds.

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