Plataforma Solar de Almería-CIEMAT, Carretera de Senés, km 4, 04200 Tabernas, Spain.
Water Res. 2013 Feb 1;47(2):833-40. doi: 10.1016/j.watres.2012.11.008. Epub 2012 Nov 14.
This study compares two different solar photo-Fenton processes, conventional photo-Fenton at pH3 and modified photo-Fenton at neutral pH with minimal Fe (5 mg L⁻¹) and minimal initial H₂O₂ (50 mg L⁻¹) concentrations for the degradation of emerging contaminants in Municipal Wastewater Treatment Plants effluents in solar pilot plant. As Fe precipitates at neutral pH, complexing agents which are able to form photoactive species, do not pollute the environment or increase toxicity have to be used to keep the iron in solution. This study was done using real effluents containing over 60 different contaminants, which were monitored during treatment by liquid chromatography coupled to a hybrid quadrupole/linear ion trap mass analyzer (LC-QTRAP-MS/MS) operating in selected reaction monitoring (SRM) mode. Concentrations of the selected contaminants ranged from a few ng L⁻¹ to tens of μg L⁻¹. It was demonstrated in all cases the removal of over 95% of the contaminants. Photo-Fenton at pH3 provided the best treatment time, but has the disadvantage that the water must be previously acidified. The most promising process was photo-Fenton modified with Ethylenediamine-N,N'-disuccinic acid (EDDS), as the pH remained in the neutral range.
本研究比较了两种不同的太阳能光芬顿工艺，即在 pH3 下的传统光芬顿和在中性 pH 下用最小 Fe（5mg/L）和最小初始 H₂O₂（50mg/L）浓度进行的改良光芬顿，用于降解市政污水处理厂废水中的新兴污染物。由于铁在中性 pH 下沉淀，因此必须使用能够形成光活性物质的络合剂，以免污染环境或增加毒性，使铁保持在溶液中。本研究使用含有超过 60 种不同污染物的实际废水进行，在处理过程中通过液相色谱与混合四极杆/线性离子阱质谱联用仪（LC-QTRAP-MS/MS）以选择反应监测（SRM）模式进行监测。所选污染物的浓度范围从几ng/L 到几十μg/L。在所有情况下，均证明去除了超过 95%的污染物。pH3 下的光芬顿提供了最佳的处理时间，但缺点是水必须预先酸化。最有前途的工艺是用乙二胺二琥珀酸（EDDS）改良的光芬顿，因为 pH 值保持在中性范围。
