Herrera F, Lopez A, Mascolo G, Albers P, Kiwi J
Institute of Physical Chemistry II, EPFL, 1015 Lausanne, Switzerland.
Water Res. 2001 Mar;35(3):750-60. doi: 10.1016/s0043-1354(00)00295-5.
Experimental results from the adsorption and subsequent catalytic combustion of the reactive dye Uniblue A on hematite indicate that this iron oxide can be used as an affordable catalyst for environmental purposes. Uniblue A was adsorbed on hematite and the products of the catalytic oxidation in O2 atmosphere were analyzed by thermal programmed gas-chromatography/mass spectrometry (STDS-GC-MS) analysis. The catalytic combustion of Uniblue A in the presence of hematite led to about 40% conversion of the dye C-content into CO2 at T = 275 degrees C. The activation energy (Ea) for the desorption of CO2 and other polyaromatic hydrocarbons (PAHs) from the hematite surface was determined to be 23.4 kcal mol-1. Identification of the species of Uniblue A in solution and those existing on the hematite surface was carried out in the framework of the generalized two-layer diffuse model. The modeling of the amount of dye absorbed on hematite is in good agreement with the experimental data.
活性染料尤尼蓝A在赤铁矿上的吸附及后续催化燃烧实验结果表明，这种氧化铁可作为一种经济实惠的环境催化剂。尤尼蓝A吸附在赤铁矿上，并通过热程序升温气相色谱/质谱联用（STDS-GC-MS）分析了在O2气氛中催化氧化的产物。在赤铁矿存在下，尤尼蓝A的催化燃烧在T = 275℃时使染料C含量约40%转化为CO2。测定了CO2和其他多环芳烃（PAHs）从赤铁矿表面解吸的活化能（Ea）为23.4 kcal mol-1。在广义双层扩散模型框架内对溶液中及赤铁矿表面存在的尤尼蓝A物种进行了鉴定。赤铁矿上吸附染料量的建模与实验数据吻合良好。
