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首页> 外文期刊>Journal of environmental science and health, Part A. Toxic/hazardous substances & environmental engineering >Decomposition of pharmaceutical micropollutant - diclofenac by photocatalytic nanopowder mixtures in aqueous media: effect of optimization parameters, identification of intermediates and economic considerations
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Decomposition of pharmaceutical micropollutant - diclofenac by photocatalytic nanopowder mixtures in aqueous media: effect of optimization parameters, identification of intermediates and economic considerations

机译：在水性介质中通过光催化纳米粉末混合物分解药物微污染物-双氯芬酸：优化参数的影响、中间体的鉴定和经济考虑

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This study evaluates application of three different nanopowder mixtures for decomposition of diclofenac (DCF), one of frequently detected pharmaceutical in wastewater. Analyzed three photocatalytic mixtures ZnO/SnO2, ZnO/TiO2 and ZnO/In2O3 are for the first time used for diclofenac degradation. A set of experiments were performed in order to investigate influence of catalyst concentration (0.10-0.60 mg mL(-1)), initial concentration of diclofenac (0.002-0.010 mg mL(-1)) and pH value (5-9). The increase in the catalyst concentration leads to a decrease in the degradation rate constant, which is the most pronounced in the ZnO/TiO2 and ranges from 0.47 (6) min(-1) to 0.25 (3) min(-1). The influence of pH on efficacy shows completely different effects: ZnO/In2O3 is most effective in alkaline environments, ZnO/TiO2 in neutral environments, while ZnO/SnO2 efficiency is good in both alkaline and acidic environments. Initial concentrations of diclofenac showed a complex effect on the degradation rate. The four dominant intermediates were detected by LC MS/MS technique. In case of all three nanomaterials, intensive degradation was achieved in first 30 minutes. The economical analysis of photocatalytic treatment was provided where the preparation of nanomaterials does not demand high costs and with the highest diclofenac concentration, total operation costs are the lowest (77.14 US$/kWh).
机译：本研究评估了三种不同纳米粉末混合物在分解双氯芬酸 （DCF） 中的应用，双氯芬酸是废水中经常检测到的药物之一。分析了三种光催化混合物ZnO/SnO2、ZnO/TiO2和ZnO/In2O3首次用于双氯芬酸降解。为研究催化剂浓度（0.10-0.60 mg mL（-1））、双氯芬酸初始浓度（0.002-0.010 mg mL（-1））和pH值（5-9）的影响，进行了一系列实验。催化剂浓度的增加导致降解速率常数的降低，降解速率常数在ZnO/TiO2中最为明显，范围为0.47 （6） min（-1）至0.25 （3） min（-1）。pH值对药效的影响表现出完全不同的影响：ZnO/In2O3在碱性环境中最有效，ZnO/TiO2在中性环境中最有效，而ZnO/SnO2在碱性和酸性环境中效率都很好。双氯芬酸的初始浓度对降解速率有复杂的影响。采用LC MS/MS技术检测4种优势中间体。对于所有三种纳米材料，在前 30 分钟内实现了强烈降解。在纳米材料制备成本不高且双氯芬酸浓度最高、总运行成本最低（77.14 US$/kWh）的情况下，对光催化处理进行了经济分析。

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