Universidad de Las Américas Puebla, Puebla, Mexico.
J Water Health. 2012 Mar;10(1):20-30. doi: 10.2166/wh.2011.034.
Sequential helminth egg inactivation using a solar driven advanced oxidation process (AOP) followed by chlorine was achieved. The photo-assisted Fenton process was tested alone under different H(2)O(2) and/or Fe(II) concentrations to assess its ability to inactivate Ascaris suum eggs. The effect of free chlorine alone was also tested. The lowest egg inactivation results were found using Fe(II) or H(2)O(2) separately (5 and 140 mmol L(-1), respectively) in dark conditions, which showed about 28% inactivation of helminth eggs. By combining Fe(II) and H(2)O(2) at the same concentrations described earlier, 55% of helminth egg inactivation was achieved. By increasing the reagent's concentration two-fold, 83% egg inactivation was achieved after 120 min of reaction time. Process efficiency was enhanced by solar excitation. Using solar disinfection only, the A. suum eggs inactivation reached was the lowest observed (58% egg inactivation after 120 min (120 kJ L(-1))), compared with tests using the photo-Fenton process. The use of the photo-Fenton reaction enhanced the process up to over 99% of egg inactivation after 120 kJ L(-1) when the highest Fe(II) and H(2)O(2) concentration was tested. Practically no effect on the helminth eggs was observed with free chlorine alone after 550 mg min L(-1) was used. Egg inactivation in the range of 25-30% was obtained for sequential processes (AOP then chlorine) using about 150 mg min L(-1).
采用太阳能驱动的高级氧化工艺（AOP）对寄生虫卵进行连续灭活，然后使用氯进行处理。单独测试了光助芬顿工艺在不同 H₂O₂ 和/或 Fe(II)浓度下的效果，以评估其灭活蛔虫卵的能力。还单独测试了自由氯的效果。在黑暗条件下，分别使用 Fe(II)或 H₂O₂（分别为 5 mmol/L 和 140 mmol/L）时，得到的虫卵灭活效果最差，仅对寄生虫卵的灭活率约为 28%。将 Fe(II)和 H₂O₂ 以相同的浓度（前文所述的浓度）组合使用时，可实现 55%的寄生虫卵灭活率。将试剂浓度提高两倍后，在 120 min 的反应时间内可实现 83%的虫卵灭活率。太阳能激发增强了工艺效率。仅使用太阳能消毒时，观察到的 A. suum 虫卵灭活率最低（120 min 时为 58%（120 kJ/L）），与使用光芬顿工艺的测试相比。当测试最高的 Fe(II)和 H₂O₂ 浓度时，使用光芬顿反应可将该过程的效率提高到 120 kJ/L 后超过 99%的虫卵灭活率。单独使用游离氯时，即使使用 550 mg/min·L⁻¹ 的氯，对寄生虫卵也几乎没有影响。在使用约 150 mg/min·L⁻¹ 的顺序工艺（AOP 然后是氯）时，可获得 25-30%的虫卵灭活率。
