Thermodynamic parameters of adsorption of 1,10-phenanthroline and 2,2′-bipyridyl on hematite, kaolinite and montmorillonites

Ferreiro, E. A.; Bussetti, S. G. de

doi:10.1016/j.colsurfa.2006.12.032

Cited by 26 publications

(11 citation statements)

References 38 publications

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“…d Capone et al, 1985. e Farkas et al, 1999 in the BPI experiments, which suggests that a chemisorption reaction occurred between the glass and BPI, as has been observed on clay and oxides (Ferreiro et al, 1983;Ferreiro and Bussetti, 2007).…”

Section: Oamentioning

confidence: 78%

Impact of iron chelators on short-term dissolution of basaltic glass

Pérez¹,

Rossano²,

Trcera

et al. 2015

Geochimica et Cosmochimica Acta

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Section: Oamentioning

confidence: 78%

Impact of iron chelators on short-term dissolution of basaltic glass

Pérez¹,

Rossano²,

Trcera

et al. 2015

Geochimica et Cosmochimica Acta

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“…This also suggests that the degree of total energy released during bond formation is less than the degree of total energy captured during bond breakage [83]. Depending on the value of Δ H 0 , the adsorption system could be described as physical (<21 kJ/mol) or chemical (~100–500 kJ/mol) in nature [85]. Based on the magnitude of Δ H 0 , removal of As(V) using CCB is governed by physisorption, which agrees with the obtained E a value.…”

Section: Resultsmentioning

confidence: 99%

Treatment of Contaminated Groundwater via Arsenate Removal Using Chitosan-Coated Bentonite

Yee

Arida²,

Futalan

et al. 2019

Molecules

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In the present research, treatment of contaminated groundwater via adsorption of As(V) with an initial concentration of 50.99 µg/L using chitosan-coated bentonite (CCB) was investigated. The effect of adsorbent mass (0.001 to 2.0 g), temperature (298 to 328 K), and contact time (1 to 180 min) on the removal efficiency was examined. Adsorption data was evaluated using isotherm models such as Langmuir, Freundlich, and Dubinin-Radushkevich. Isotherm study showed that the Langmuir (R2 > 0.9899; χ2 ≤ 0.91; RMSE ≤ 4.87) model best correlates with the experimental data. Kinetics studies revealed that pseudo-second order equation adequately describes the experimental data (R2 ≥ 0.9951; χ2 ≤ 0.8.33; RMSE ≤ 4.31) where equilibrium was attained after 60 min. Thermodynamics study shows that the As(V) adsorption is non-spontaneous (ΔG0 ≥ 0) and endothermic (ΔH0 = 8.31 J/mol) that would result in an increase in randomness (ΔS0 = 29.10 kJ/mol•K) within the CCB-solution interface. FT-IR analysis reveals that hydroxyl and amino groups are involved in the adsorption of As(V) from groundwater. Results of the present research serve as a tool to determine whether CCB is an environmentally safe and cost effective material that could be utilized in a permeable reactive barrier system for the remediation of As(V) from contaminated groundwater.

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“…The physisorption process usually have energies in the range of 5-40 KJ mol −1 while higher activation energy (40-800 KJ mol −1 ) suggest chemisorption [24,25]. The free energy of adsorption ( G • ) can be related with the equilibrium constant K L (L mol −1 ) corresponding the Langmuir constant, b, as mentioned in Table 4 by the following equation [26,27]:…”

Section: Adsorption Kinetics and Thermodynamic Studymentioning

confidence: 99%