State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China.
Bioresour Technol. 2010 Feb;101(3):865-9. doi: 10.1016/j.biortech.2009.08.098. Epub 2009 Sep 30.
Leachate from a municipal landfill site, which has been treated by biological process, was treated by photoelectrochemical oxidation in a pilot scale flow reactor, using DSA anode and UV light irradiation. At a current density of 67.1mA/cm(2) and 2.5h reaction time, the removal rates achieved were for 74.1% COD, 41.6% for TOC, and 94.5% for ammonium in the electrolysis process with UV light irradiation. In comparison, the removal rates of COD, TOC, and ammonium were decreased in the individual electrolysis process, respectively. The increase induced by the UV light irradiation was analyzed. The removal rates increased with the increase of current densities in the photoelectrochemical process. Combined with UV-vis spectra and gas chromatography-mass spectroscopy analysis, it is believed that the organic contaminants were efficiently mineralized into small molecular acids. At the meantime, the concentrations of metal ions in the landfill leachate were largely reduced.
经过生物处理的城市垃圾填埋场渗滤液在中试规模的流动反应器中采用 DSA 阳极和紫外光照射进行光电化学氧化处理。在电流密度为 67.1mA/cm(2)和 2.5 小时反应时间的条件下，电解过程中 COD 的去除率达到 74.1%，TOC 为 41.6%，铵为 94.5%。相比之下，在单独的电解过程中，COD、TOC 和铵的去除率均降低。分析了紫外光照射引起的去除率增加。光电化学过程的去除率随电流密度的增加而增加。结合紫外可见光谱和气相色谱-质谱分析，认为有机污染物被有效地矿化为小分子酸。同时，垃圾渗滤液中的金属离子浓度也大大降低。
