Abstract：
:An investigation was made on the adsorption and kinetics of photodegradation of potassium hydrogenphthalate in an aqueous suspension of TiO(2). Two models, Langmuir and Freundlich, were used to describe the adsorption process and the model proposed by Langmuir-Hinshelwood (L-H) was employed to describe the kinetics of the photodecomposition reactions of hydrogenphthalate. The results of the adsorptions were fitted to the models proposed by Langmuir and Freundlich. Adsorption was found to be a function of the temperature, with adsorption capacity increasing from 2.4 to 4.5 mg/g when the temperature rose from 20 to 30 degrees C. The kinetic model indicates that the rate constant, k, of the first order reaction, is high in the 10.0 to 100 mg/l interval, which is coherent with the low value of the adsorption constant, K. The results fitted to the L-H model led to an equation that, within the range of concentrations studied here, theoretically allows one to evaluate the photodegradation rate.
journal_name
Chemospherejournal_title
Chemosphereauthors
Valente JP,Padilha PM,Florentino AOdoi
10.1016/j.chemosphere.2005.11.050subject
Has Abstractpub_date
2006-08-01 00:00:00pages
1128-33issue
7eissn
0045-6535issn
1879-1298pii
S0045-6535(05)01411-6journal_volume
64pub_type
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