Effect of μM Fe addition, mild heat and solar UV on sulfate radical-mediated inactivation of bacteria, viruses, and micropollutant degradation in water.
Effect of μM Fe addition, mild heat and solar UV on sulfate radical-mediated inactivation of bacteria, viruses, and micropollutant degradation in water.
复制标题
DOI：
10.1016/j.watres.2018.04.054
复制
发表时间：
2018-09
期刊：
影响因子：
12.8
通讯作者：
Miloch Marjanovic;Stefanos Giannakis;D. Grandjean;L. D. de Alencastro;C. Pulgarin
中科院分区：
文献类型：
--
作者：
Miloch Marjanovic;Stefanos Giannakis;D. Grandjean;L. D. de Alencastro;C. Pulgarin
在这项工作中，通过在太阳光下适量添加铁和过二硫酸钠（PDS）来增强日光消毒（SODIS）。对激活因子进行了系统评估，首先是分离的，然后成对进行，最后在铁/热/太阳能 UV-PDS 组合激活过程中得出结论。太阳光是最有效的（单一）活化剂，其与铁和热的结合（双重活化）产生了高水平的协同效应（高达 S=2.13）。三重激活能够在不到 1 小时内将细菌负荷减少高达 6 个对数，与比较中完成的光芬顿过程类似（单独使用 SODIS：> 5 小时）。在相同条件下，铁氧化物是 PDS 的合适活化剂，而有机物的存在通过三重活化的 PDS 过程增强了细菌灭活。微污染物（即药物、农药）的（选定的）混合物的降解也以类似的数量级实现，并且比光芬顿过程更快。最后，在分钟范围的停留时间内实现了病毒病原体指示剂（MS2噬菌体）的去除。上述事实表明，温和的联合工艺作为潜在的 SODIS 增强技术的适用性，可以为阳光明媚的国家，特别是发展中国家生产安全饮用水。
In this work, solar disinfection (SODIS) was enhanced by moderate addition of Fe and sodium peroxydisulfate (PDS), under solar light. A systematic assessment of the activating factors was performed, firstly isolated, then in pairs and concluded in the combined Fe/heat/solar UV-PDS activation process. Solar light was the most effective (single) activator, and its combination with Fe and heat (double activation) yielded high level of synergies (up to S = 2.13). The triple activation was able to reduce the bacterial load up to 6-log in less than 1 h, similarly to the photo-Fenton process done in comparison (SODIS alone: >5 h). Fe-oxides were suitable activators of PDS under the same conditions while the presence of organic matter enhanced bacterial inactivation by the triple activated PDS process. The degradation of a (selected) mixture of micropollutants (i.e. drugs, pesticides) was also achieved in similar order of magnitude, and faster than the photo-Fenton process. Finally, the removal of a viral pathogen indicator (MS2 bacteriophage) was attained at minute-range residence times. The aforementioned facts indicate the suitability of the mild, combined process, as a potential SODIS enhancement, producing safe drinking water for sunny and especially for developing countries.