Zhang Ruifeng, Huang Tinglin, Wen Gang, Chen Yongpan, Cao Xin, Zhang Beibei
Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China.
Shanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
Int J Environ Res Public Health. 2017 Jul 19;14(7):807. doi: 10.3390/ijerph14070807.
An iron-manganese co-oxide filter film (MeO) has been proven to be a good catalyst for the chemical catalytic oxidation of ammonium in groundwater. Compared with groundwater, surface water is generally used more widely and has characteristics that make ammonium removal more difficult. In this study, MeO was used to remove ammonium from surface water. It indicated that the average ammonium removal efficiency of MeO was greater than 90%, even though the water quality changed dramatically and the water temperature was reduced to about 6-8 °C. Then, through inactivating microorganisms, it showed that the removal capability of MeO included both biological (accounted for about 41.05%) and chemical catalytic oxidation and chemical catalytic oxidation (accounted for about 58.95%). The investigation of the characterizations suggested that MeO was formed by abiotic ways and the main elements on the surface of MeO were distributed homogenously. The analysis of the catalytic oxidation process indicated that ammonia nitrogen may interact with MeO as both ammonia molecules and ammonium ions and the active species of O₂ were possibly O and O₂.
铁锰复合氧化物滤膜（MeO）已被证明是地下水中铵化学催化氧化的良好催化剂。与地下水相比，地表水的使用更为广泛，且具有使铵去除更困难的特性。在本研究中，采用MeO去除地表水中的铵。结果表明，即使水质发生显著变化且水温降至约6-8℃，MeO的平均铵去除效率仍大于90%。然后，通过灭活微生物表明，MeO的去除能力包括生物作用（约占41.05%）和化学催化氧化（约占58.95%）。对其特性的研究表明，MeO是通过非生物方式形成的，且MeO表面的主要元素分布均匀。催化氧化过程分析表明，氨氮可能以氨分子和铵离子的形式与MeO相互作用，且O₂的活性物种可能是O和O₂。
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