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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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • 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

  • 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