The use of the magnetic fraction (MF) of a low-grade titanium ore (TO) and two oxidants (H₂O₂ and NaClO), testing each one separately, were compared in photo-Fenton like systems to degrade thiabendazole (TBZ) as a model micropollutant. As far as the author’s knowledge goes, this work presents for the first time the assessment of NaClO as an alternative to H₂O₂ in heterogeneous systems, where the Fenton-type photocatalyst is a natural mineral; TO has a Mexican origin and its magnetic fraction is mainly composed of Ilmenite (47.8% w/w FeTiO₃). The experiments were carried out at bench scale in a solar simulator, using a batch raceway pond reactor. Oxidant and MF concentrations were optimized by a composite experimental design, which allowed to achieve 97% TBZ degradation at 15 and 30 min for NaClO and H₂O₂ systems, respectively, when the initial concentration of TBZ was 37 µM. Pointing out that both pseudo-first order rate constants (\(k^{\prime}\)), \(k_{NaClO}^{^{\prime}}\) = 0.226 min⁻¹ and \(k_{{H_{2} O_{2} }}^{^{\prime}}\) = 0.065 min⁻¹, are in the order of homogeneous photo-Fenton applied to degrade TBZ; however, the time to achieve the same level of TBZ degradation is halved when NaClO is used instead of H₂O₂, thus the capacity of treatment plants can be increased. Furthermore, better results of mineralization (54%), DQO (76%), DBO₅ (44%) and acute toxicity (74%) removal were observed when NaClO was used as an oxidant compared to H₂O₂, whose values were 42, 67, 38 and 58% for the parameters aforementioned. These positive results demonstrate the feasibility of the use of NaClO as an alternative oxidant to H₂O₂ in the heterogeneous photo Fenton like process.

在类似光芬顿的系统中比较了低品位钛矿（TO）和两种氧化剂（H ₂ O ₂和NaClO）的磁性部分（MF）的使用情况，分别测试了每种氧化剂对噻苯达唑（TBZ）的降解。作为模型微污染物。就作者所知，这项工作首次提出了在非均相系统中使用NaClO替代H ₂ O ₂的评估，其中Fenton型光催化剂是天然矿物。TO起源于墨西哥，其磁性成分主要由钛铁矿（47.8％w / w FeTiO ₃）。实验是在太阳模拟器中以台式规模，使用间歇水道池塘反应器进行的。通过复合实验设计优化了氧化剂和MF的浓度，当TBZ的初始浓度为37 µM时，NaClO和H ₂ O ₂系统分别在15和30分钟时可实现97％的TBZ降解。指出两个伪一阶速率常数（\（k ^ {\ prime} \）），\（k_ {NaClO} ^ {^ {\ prime}} \）  = 0.226 min ^-1和\（k _ {{ H_ {2} O_ {2}}} ^ {^ {\ prime}} \）  = 0.065分钟^-1，按均匀光芬顿的顺序施加以降解TBZ；但是，使用NaClO代替H ₂ O ₂时，达到相同水平的TBZ降解所需的时间减少了一半，因此可以增加处理厂的产能。此外，矿化（54％），DQO（76％），DBO的更好的结果₅时的NaClO被用作氧化剂相比至H进行观察（44％）和急性毒性（74％）去除₂ Ô ₂，其值分别为前述参数为42％，67％，38％和58％。这些积极的结果证明了在异质光芬顿样工艺中使用NaClO作为H ₂ O ₂的替代氧化剂的可行性。