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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.12 [2005] >
IJCT Vol.12(1) [January 2005] >
| Title: | Degradation of ferrohexacyanide by advanced oxidation processes |
| Authors: | Malhotra, Sarla
Pandit, M
Tyagi, D K |
| Keywords: | Degradation
ferrohexacyanide
UV-radiation
ozone
hydrogen peroxide |
| Issue Date: | Jan-2005 |
| Publisher: | CSIR |
| IPC Code: | C07B 33/00 |
| Abstract: | Degradation of
ferrohexacyanide in aqueous solution by advanced oxidation processes was
studied. Advanced oxidation processes included ozone and its combination with H2O2
and ultraviolet radiation (UV). Results demonstrated that UV alone was not
sufficient to degrade cyanide ion but an oxidant was required for complete
degradation. Degradation of 100 mg/L cyanide in aqueous solution was
pseudo-first order reaction at pH 11.0. Lower pH was avoided due to formation
of HCN gas but higher pH favoured the degradation. A comparison of three
systems i.e. O3, O3/H2O2
and UV/O3/H2O2 showed that UV/O3/H2O2
was the best system. The experimental results showed that the optimum
conditions for UV/O3/H2O2 process for total
cyanide degradation were obtained at l = 365 nm
(400 W medium pressure UV lamp), ozone concentration = 35 mg/L and H2O2
= 88.2 mM. |
| Page(s): | 19-24 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.12(1) [January 2005]
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