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Comparative study on sulfamethoxazole degradation by Fenton and Fe(II)-activated persulfate process

机译：FENTON和Fe（II） - 活硫酸盐法的磺胺甲恶唑降解的比较研究

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摘要

Pharmaceuticals and personal care products (PPCPs) are emerging contaminants, which are ubiquitous and pose the potential risk to ecosystem and human health. It is necessary to remove PPCPs from water and wastewater. In this study, sulfamethoxazole, a widely used antibiotic, was chosen as targeted pollutant. Fenton process and persulfate process were employed to remove sulfamethoxazole from aqueous solution. The results showed that Fenton process required less amount of Fe(II) and oxidant than persulfate process to achieve 100% removal of sulfamethoxazole in the water sample prepared with deionized water. The maximal mineralization reached 83% when hydrogen peroxide concentration was 1 mM and Fe(II) was 0.05 mM for Fenton process. The maximal mineralization for persulfate process was 60% with 4 mM of persulfate and 4 mM of Fe(II). The increase of Fe(II) concentration could increase the decomposition of hydrogen peroxide and persulfate, but did not increase the mineralization of sulfamethoxazole, indicating that the decomposition of hydrogen peroxide and persulfate was not positive correlation with the removal and mineralization of sulfamethoxazole. Five intermediate compounds were detected in Fenton process while eight intermediate compounds in persulfate process, suggesting that different degradation pathway occurred in the two processes. The wastewater components had negative effect on the degradation of sulfamethoxazole for both Fenton and persulfate processes. The removal efficiency of sulfamethoxazole was 52.5% and 52.3%, respectively, for Fenton and persulfate processes. Persulfate process could be an alternative for treating the real wastewater containing PPCPs.
机译：药品和个人护理产品（PPCP）是新兴污染物，这是普遍存在的，对生态系统和人类健康构成潜在风险。有必要从水和废水中除去PPCP。在本研究中，选择磺胺甲氧唑，广泛使用的抗生素是靶向污染物。使用芬顿工艺和过硫酸盐的方法从水溶液中除去磺胺甲恶唑。结果表明，FENTON工艺少于过硫酸盐过程所需的Fe（II）和氧化剂，以在用去离子水制备的水样中达到100％除去磺胺甲恶唑。当过氧化氢浓度为1mm时，最大矿化达到83％，FENTON工艺为0.05mm的Fe（II）。过硫酸盐方法的最大矿化为60％，具有4mm过硫酸盐和4毫米Fe（II）。 Fe（II）浓度的增加可以增加过氧化氢和过硫酸盐的分解，但未增加磺胺甲恶唑的矿化，表明过氧化氢和过硫酸氢的分解与磺胺甲恶唑的除去和矿化是阳性相关性。在FETON过程中检测到五种中间化合物，而过硫酸盐过程中的八个中间化合物，表明两种过程中发生了不同的降解途径。废水组分对Fenton和过硫酸盐过程的磺胺甲恶唑的降解产生负面影响。对于FENTON和过硫酸盐方法，磺胺甲恶唑的去除效率分别为52.5％和52.3％。过硫酸盐过程可以是治疗含有PPCP的真正废水的替代方案。

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  • 来源
    《RSC Advances》 |2017年第77期|共8页
  • 作者

    Wang Shizong; Wang Jianlong;

  • 作者单位

    Tsinghua Univ Collaborat Innovat Ctr Adv Nucl Energy Technol INET Beijing 100084 Peoples R China;

    Tsinghua Univ Collaborat Innovat Ctr Adv Nucl Energy Technol INET Beijing 100084 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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