Department of Chemical Engineering, University of Castilla-La Macha, ITQUIMA, Avenida Camilo José Cela s/n, 13071, Ciudad Real, Spain.
Department of Chemical Engineering, University of Castilla-La Macha, ITQUIMA, Avenida Camilo José Cela s/n, 13071, Ciudad Real, Spain.
Chemosphere. 2020 Feb;240:124912. doi: 10.1016/j.chemosphere.2019.124912. Epub 2019 Sep 24.
In this work, the combination of biological and electrochemical processes to mineralize oxyfluorfen has been studied. First, an acclimatized mixed-culture biological treatment was used to degrade the biodegradable fraction of the pesticide, reaching up to 90% removal. After that, the non-biodegraded fraction was oxidised by electrolysis using boron-doped diamond as the anode. The results showed that the electrochemical technique was able to completely mineralize the residual pollutants. The study of the influence of the supporting electrolyte on the electrochemical process showed that the trace mineral solution used in the biological treatment was enough to completely mineralize the oxyfluorfen, resulting in total organic carbon removal rates that were well-fitted by a first-order model with a kinetic constant of 0.91 h. However, the first-order degradation rate increased approximately 20% when NaSO was added as supporting electrolyte, reaching a degradation rate of 1.16 h with a power consumption that was approximately 70% lower.
本工作研究了生物和电化学过程相结合来矿化氟草烟。首先，采用驯化的混合培养生物处理来降解农药的可生物降解部分，达到高达 90%的去除率。然后，用过硼化金刚石作为阳极通过电解氧化未生物降解部分。结果表明，电化学技术能够完全矿化残留污染物。研究支持电解质对电化学过程的影响表明，生物处理中使用的痕量矿物溶液足以完全矿化氟草烟，导致总有机碳去除率很好地符合一级模型，动力学常数为 0.91 h。然而，当添加 NaSO 作为支持电解质时，一级降解速率增加了约 20%，达到 1.16 h 的降解速率，能耗降低了约 70%。
