The main purpose of this pilot plant study was to compare degradation of five microcontaminants (MCs) (antipyrine, carbamazepine, caffeine, ciprofloxacin and sulfamethoxazole at 100 μg/L) by solar photo-Fenton mediated by EDDS and solar/Fe:EDDS/S2O82-. The effects of the Fe:EDDS ratio (1:1 and 1:2), initial iron species (Fe(II) or Fe(III) at 0.1 mM) and oxidizing agent (S2O82- or H2O2 at 0.25-1.5 mM) were evaluated. The higher the S2O82- concentration, the faster MC degradation was, with S2O82- consumption always below 0.6 mM and similar degradation rates with Fe(II) and Fe(III). Under the best conditions (Fe 0.1 mM, Fe:EDDS 1:1, S2O82- 1 mM) antipyrine, carbamazepine, caffeine, ciprofloxacin and sulfamethoxazole at 100 μg/L where 90% eliminated applying a solar energy of 2 kJ/L (13 min at 30 W/m2 solar radiation <400 nm). Therefore, S2O82- promotes lower consumption of EDDS as Fe:EDDS 1:1 was better than Fe:EDDS 1:2. In photo-Fenton-like processes at circumneutral pH, EDDS with S2O82- is an alternative to H2O2 as an oxidizing agent.

中文翻译：

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EDDS作为增强天然水中太阳高级氧化过程的络合剂：铁种类和不同氧化剂的作用。

这项中试工厂研究的主要目的是比较EDDS和solar / Fe：EDDS / S2O82介导的太阳光芬顿对五种微污染物（MCs）（100μg/ L的安替比林，卡马西平，咖啡因，环丙沙星和磺胺甲恶唑）的降解作用。 - Fe：EDDS比（1：1和1：2），初始铁离子（0.1 mM时的Fe（II）或Fe（III））和氧化剂（0.25-1.5 mM时的S2O82-或H2O2）的影响为评估。S2O82-浓度越高，MC降解越快，S2O82-消耗始终低于0.6 mM，Fe（II）和Fe（III）的降解速率相似。在最佳条件下（Fe 0.1 mM，Fe：EDDS 1：1，S2O82-1 mM），安替比林，卡马西平，咖啡因，环丙沙星和磺胺甲恶唑的浓度为100μg/ L，其中90％被消除，使用2 kJ / L的太阳能（13在30 W / m2太阳辐射<400 nm时的最小时间）。所以，S2O82-促进了EDDS的较低消耗，因为Fe：EDDS 1：1优于Fe：EDDS 1：2。在环境pH值下类似于光芬顿的过程中，具有S2O82-的EDDS是H2O2的替代氧化剂。