Adsorption of chlorendic acid onto hydrophilic fumed titanium dioxide (P25)
نویسنده
چکیده
The adsorption behavior of chlorendic acid (1, 4, 5, 6, 7, 7-hexachlorobicyclo-(2, 2, 1) -hept-5-ene-2, 3dicarboxylic acid) onto hydrophilic fumed TiO2 (P-25, Degussa) in aqueous suspension was investigated. Results indicate that chlorendic acid adsorbed strongly in short times (2-5 mins) onto TiO2. Adsorption data is consistent with LangmuirHinshelwood isotherm model for monolayer adsorption and the shape of the isotherm indicates second order behavior. Calculated adsorption constant K, and maximum adsorbable quantity at 20 o C were obtained as (0.12 ± 0.03) l/mg and (4.4 ± 0.2) mg/g TiO2 respectively. Adsorption of chlorendic acid in water onto TiO2 is exothermic.
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