Real Ec Synthesis Lab Report
14
may be a possible EEC. Moreover, the calculated compensation temperature by inverting the straight line slope, T comp = 57.9 ºC, is higher than the average experimental value, T exp = 32.5
ºC. This great difference between these two values of temperatures might reflect the existence of real EEC rather than experimental error [58]. Another evidence of EEC is the approximate constant ∆G # with a significant change in both ∆H # and ∆S # . Finally, EEC was also investigated by using the error bars in the correlation diagram, Fig (9b) [59]. Although, the existence of miscellaneous evidence but EEC still holds the possibility of being inexact and arbitrary due to an insufficient number of points on the straight line and mismatch …show more content…
TOC Measurements
The decolorization of IC does not necessarily mean a complete degradation; It could be confined to fragmentation without complete mineralization [82]. A sample of IC solution of
10 -4 mol l -1 , was acidified by sulfuric acid to obtain pH = 2 or less in order to convert inorganic carbon species to CO 2 and to give no free carbonate anions in solution. The samples were also purged with nitrogen for an hour to remove the dissolved CO 2 . All the non-purgeable carbon was considered as a measure for TOC [83]. The TOC content was measured 22.15 mg l -1 . An oxidation experiment was carried on 100 ml of the same IC solution of 10 -4 mol l -1 of pH = 8 with H 2 O 2 of 0.025 mol l -1 in the presence of CAT1 with a concentration of 80 mg l -1 . The dye and its colored conjugated products are very rapidly decolorized within 1 hr and left for another hour for complete oxidation. The catalyst was separated by filtration and the filtrate was acidified, purged, and subjected to TOC measurement. The same steps have been replicated with 200 mg l -1 of CAT2 and 300 mg l -1 of
CAT3. Residual TOC of 1.12, 1.26, 1.22 mg l -1 were recorded for CAT1, CAT2, CAT3, respectively. These residuals might due to non-purgeable carbon, unseparated catalyst,
may be a possible EEC. Moreover, the calculated compensation temperature by inverting the straight line slope, T comp = 57.9 ºC, is higher than the average experimental value, T exp = 32.5
ºC. This great difference between these two values of temperatures might reflect the existence of real EEC rather than experimental error [58]. Another evidence of EEC is the approximate constant ∆G # with a significant change in both ∆H # and ∆S # . Finally, EEC was also investigated by using the error bars in the correlation diagram, Fig (9b) [59]. Although, the existence of miscellaneous evidence but EEC still holds the possibility of being inexact and arbitrary due to an insufficient number of points on the straight line and mismatch …show more content…
TOC Measurements
The decolorization of IC does not necessarily mean a complete degradation; It could be confined to fragmentation without complete mineralization [82]. A sample of IC solution of
10 -4 mol l -1 , was acidified by sulfuric acid to obtain pH = 2 or less in order to convert inorganic carbon species to CO 2 and to give no free carbonate anions in solution. The samples were also purged with nitrogen for an hour to remove the dissolved CO 2 . All the non-purgeable carbon was considered as a measure for TOC [83]. The TOC content was measured 22.15 mg l -1 . An oxidation experiment was carried on 100 ml of the same IC solution of 10 -4 mol l -1 of pH = 8 with H 2 O 2 of 0.025 mol l -1 in the presence of CAT1 with a concentration of 80 mg l -1 . The dye and its colored conjugated products are very rapidly decolorized within 1 hr and left for another hour for complete oxidation. The catalyst was separated by filtration and the filtrate was acidified, purged, and subjected to TOC measurement. The same steps have been replicated with 200 mg l -1 of CAT2 and 300 mg l -1 of
CAT3. Residual TOC of 1.12, 1.26, 1.22 mg l -1 were recorded for CAT1, CAT2, CAT3, respectively. These residuals might due to non-purgeable carbon, unseparated catalyst,