Departamento de Ingeniería Sustentable, Centro de Investigación en Materiales Avanzados, S.C. Calle CIMAV 110, Colonia 15 de mayo, C.P, 34147, Durango, México.
Instituto Politécnico Nacional, CIIDIR-Durango, Calle Sigma 119, Fraccionamiento 20 de Noviembre II, C. P, 34220, Durango, México.
Environ Sci Pollut Res Int. 2022 Sep;29(41):61594-61607. doi: 10.1007/s11356-021-16507-5. Epub 2021 Sep 17.
The following work provides a perspective on the potential application of solar heterogeneous photocatalysis, which is a nonselective advanced oxidation process considered as a sustainable technology, to assist in arsenic removal from water, which is a global threat to human health. Heterogeneous photocatalysis can oxidize trivalent arsenic to pentavalent arsenic, decreasing its toxicity and easing its removal with other technologies, such as chemical precipitation and adsorption. Several lab-scale arsenic photocatalytic oxidation and diverse solar heterogeneous photocatalytic operations carried out in different reactor designs are analyzed. It was found out that this technology has not been translated to operational pilot plant scale prototypes. General research on reactors is scarce, comprising a small percentage of the photocatalysis related scientific literature. It was possible to elucidate some operational parameters that a reactor must comply to operate efficiently. Reports on small-scale application shed light that in areas where other water purification technologies are economically and/or technically not suitable, and the solar energy is available, shed light on the fact that solar heterogeneous photocatalysis is highly promissory within a water purification process for removal of arsenic from water.
以下工作提供了对太阳能多相光催化技术潜在应用的展望，该技术作为一种可持续技术，被认为是非选择性的高级氧化工艺，可用于辅助去除水中的砷，这是对全球人类健康的威胁。多相光催化可以将三价砷氧化为五价砷，降低其毒性，并使其易于与其他技术（如化学沉淀和吸附）结合去除。分析了几种实验室规模的砷光催化氧化和不同反应器设计中的多种太阳能多相光催化操作。结果发现，该技术尚未转化为可运行的中试厂规模原型。一般来说，关于反应器的研究很少，在与光催化相关的科学文献中只占很小的比例。可以阐明一些反应器必须遵守的操作参数，以实现高效运行。小规模应用的报告表明，在其他水净化技术在经济和/或技术上不适用且太阳能可用的地区，太阳能多相光催化在水中砷的净化过程中具有很高的应用前景。
