Kositzi M, Poulios I, Malato S, Caceres J, Campos A
Lab. Physical Chemistry, Department of Chemistry, University of Thessaloniki, Thessaloniki 54124, Greece.
Water Res. 2004 Mar;38(5):1147-54. doi: 10.1016/j.watres.2003.11.024.
The photocatalytic organic content reduction of a selected synthetic municipal wastewater by the use of heterogeneous and homogeneous photocatalytic methods under solar irradiation has been studied at a pilot-plant scale at the Plataforma Solar de Almeria. In the case of heterogeneous photocatalysis the effect of catalysts and oxidants concentration on the decomposition degree of the wastewater was examined. By an accumulation energy of 50 kJL(-1) the synergetic effect of 0.2 gL(-1)TiO(2) P-25 with hydrogen peroxide (H(2)O(2)) and Na(2)S(2)O(8) leads to a 55% and 73% reduction of the initial organic carbon content, respectively. The photo-fenton process appears to be more efficient for this type of wastewater in comparison to the TiO(2)/oxidant system. An accumulation energy of 20 kJL(-1) leads to 80% reduction of the organic content. The presence of oxalate in the Fe(3+)/H(2)O(2) system leads to an additional improvement of the photocatalytic efficiency.
在阿尔梅里亚太阳能平台的中试规模下，研究了在太阳辐射下使用非均相和均相光催化方法对选定的合成城市废水进行光催化有机含量降低的情况。在非均相光催化的情况下，研究了催化剂和氧化剂浓度对废水分解程度的影响。通过50 kJL(-1)的累积能量，0.2 gL(-1)TiO(2) P-25与过氧化氢（H(2)O(2)）和Na(2)S(2)O(8)的协同作用分别使初始有机碳含量降低了55%和73%。与TiO(2)/氧化剂体系相比，光芬顿法对这类废水似乎更有效。20 kJL(-1)的累积能量可使有机含量降低80%。Fe(3+)/H(2)O(2)体系中草酸盐的存在导致光催化效率进一步提高。
