Adsorption enthalpy of lead(II) and phenol on coals and activated carbon in the view of thermodynamic analysis and calorimetric measurements
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F18%3AA1901O9Z" target="_blank" >RIV/61988987:17310/18:A1901O9Z - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.jct.2017.08.026" target="_blank" >http://dx.doi.org/10.1016/j.jct.2017.08.026</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jct.2017.08.026" target="_blank" >10.1016/j.jct.2017.08.026</a>
Alternative languages
Result language
angličtina
Original language name
Adsorption enthalpy of lead(II) and phenol on coals and activated carbon in the view of thermodynamic analysis and calorimetric measurements
Original language description
Comparison among adsorption enthalpies of thermodynamic analysis and these of direct calorimetric measurements is reported for sorption of lead(II) and phenol on natural coals and activated carbon. Thermodynamic calculations came out from developments of equilibrium adsorption isotherms recorded at 303 K, 333 K and 353 K. Standard adsorption enthalpies ?H0 were calculated from temperature dependences of equilibrium constants of adsorption Ka, with values of Ka being evaluated directly from experimental data and from fitted courses of the Langmuir and Freundlich isotherms. In addition, dependences of isosteric enthalpy on surface coverage were evaluated. Values of the exothermic enthalpies (ranging from -6 kJ mol-1 to -50 kJ mol-1) were obtained, however exclusive endothermic effect for lead(II) adsorption on a sample of natural coal (24 kJ mol-1) was also ascertained. Direct calorimetric measurements using flow and immersion techniques then proved that all the studied adsorptions proceed with exothermic effects from -2 kJ mol-1 to -42 kJ mol-1. It was found that experimental adsorption enthalpies correspond better to mean isosteric enthalpies in the interval 0 ? 1 mol kg-1 of the surface coverages than to the standard adsorption enthalpies ?H0 of the thermodynamic calculations.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
The Journal of Chemical Thermodynamics
ISSN
0021-9614
e-ISSN
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Volume of the periodical
116
Issue of the periodical within the volume
January
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
10
Pages from-to
97-106
UT code for WoS article
000418492900011
EID of the result in the Scopus database
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