Aerogel materials for photocatalytic detoxification of cyanide wastes in water

A Kinetic Study on Photocatalytic Oxidation of Phenol in Water by Silica-Dispersed Titania Nanoparticles

“…Substituting I into Eq. [18] by Eq. [19], one can obtain the reaction rate for the whole suspension:…”

“…Since the late 1980s, many efforts have been concentrated on the synthesis of photocatalyst in supported form, from silica gel (13)(14)(15), pillared clay (15,16), to zeolite (17). Furthermore, composite photocatalysts have also been tried, such as SiO 2 -TiO 2 aerogel (18) and SiO 2 -TiO 2 xerogel (19). In addition to the better recovery of photocatalyst from the solution, those supports or mixtures were widely reported as good adsorbents for the organics.…”

Decomposition of gaseous HCN in the presence of Ni-containing catalysts

“…They are considered among the most dangerous compounds for the environment and their toxicity is mainly due to their aptitude to release free cyanides. Different processes are proposed and used for the removal of cyanides in solutions and slurries [1][2][3][4][5][6][7][8][9][10][11][12].…”

Low-temperature aqueous phase oxidation of cyanide ions with the participation of nickel oxide system

“…A number of methods are currently available for the treatment of cyanide containing effluents, namely chlorination [1,2] ozonation [3][4][5], ion exchange [6,7], electrochemical decomposition [8][9][10], photocatalytic oxidation [11]. The process more frequerddy employed is cyanide destruction by chlorination.…”