Hydrodynamic cavitation-enhanced activation of sodium percarbonate for estrogen removal.

IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Water Science and Technology Pub Date : 2023-12-01 DOI:10.2166/wst.2023.382
Klára Odehnalová, Petra Přibilová, Eliška Maršálková, Štěpán Zezulka, František Pochylý, Pavel Rudolf, Blahoslav Maršálek
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Abstract

The present paper investigated the potential of hydrodynamic cavitation (HC) as an effective tool for activating sodium percarbonate (SPC). The method's efficiency was demonstrated by effectively removing estrogens, which are pollutants that have adverse impacts on aquatic ecosystems. The effects of the SPC concentration, temperature of solution, and cavitation time were evaluated. After SPC/HC treatment, the removal of estrogens was monitored by liquid chromatography-tandem mass spectrometry (LC -MS/MS). Already after 4 s of treatment and 24 h of reaction time, more than 97% of estrogens (initial concentration of 300 ng/L) were removed. The effect of post-treatment time is not considered in several papers, even though it seems to be crucial and is discussed here. The results were supported by the values of degradation rate constants, which fit the pseudo-first-order kinetic model. We also verified that HC alone was not effective for estrogen removal under the selected conditions. The sustainability of the SPC/HC system was evaluated based on electric energy per order calculation. The combination of SPC and HC is a promising approach for rapidly degrading micropollutants such as estrogenic compounds without the need for additional technological steps, such as pH or temperature adjustment.

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水动力空化增强活化过碳酸钠去除雌激素。
本文研究了流体动力空化(HC)作为活化过碳酸钠(SPC)的有效工具的潜力。通过有效去除对水生生态系统有不利影响的污染物雌激素,证明了该方法的高效性。对 SPC 浓度、溶液温度和空化时间的影响进行了评估。SPC/HC 处理后,采用液相色谱-串联质谱法(LC -MS/MS)监测雌激素的去除情况。经过 4 秒钟的处理和 24 小时的反应时间后,97% 以上的雌激素(初始浓度为 300 ng/L)已被去除。虽然后处理时间的影响似乎至关重要,但多篇论文都没有考虑到这一影响,因此在此进行讨论。降解速率常数的值符合伪一阶动力学模型,为研究结果提供了支持。我们还证实,在选定的条件下,单独使用 HC 并不能有效去除雌激素。根据每阶电能计算,对 SPC/HC 系统的可持续性进行了评估。SPC 和 HC 的结合是一种快速降解微污染物(如雌激素化合物)的有效方法,无需额外的技术步骤,如 pH 值或温度调节。
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来源期刊
Water Science and Technology
Water Science and Technology 环境科学-工程:环境
CiteScore
4.90
自引率
3.70%
发文量
366
审稿时长
4.4 months
期刊介绍: Water Science and Technology publishes peer-reviewed papers on all aspects of the science and technology of water and wastewater. Papers are selected by a rigorous peer review procedure with the aim of rapid and wide dissemination of research results, development and application of new techniques, and related managerial and policy issues. Scientists, engineers, consultants, managers and policy-makers will find this journal essential as a permanent record of progress of research activities and their practical applications.
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