紫外线激活过氧化钙系统可同时实现有机磷降解、磷酸盐回收和碳固定。

Journal of hazardous materials Pub Date : 2024-10-05 Epub Date: 2024-08-20 DOI:10.1016/j.jhazmat.2024.135582
Zhenjun Xiao, Ping Chen, Guoguang Liu, Wenying Lv, Weirui Chen, Qianxin Zhang, Lee Blaney
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摘要

高级氧化工艺是处理新出现的污染物的理想技术。然而,有机磷化合物的传统高级氧化过程会释放无机磷酸盐,引起下游富营养化问题。因此,我们对紫外线激活过氧化钙(UV/CaO2)系统进行了评估,以有效处理有机磷化合物并同时捕获矿化产物磷酸盐。对降解机制、反应动力学和矿化过程进行了评估,以确定紫外线/二氧化钙工艺的整体效率和性能。不仅填补了紫外线/二氧化钙系统光催化方面的知识空白,还利用该系统确定了去除有机磷化合物及其降解产物的独特优势。实验结果证实,UV/CaO2 系统能有效矿化有机磷化合物并回收无机磷酸盐;此外,该系统的协作碳固定性能也揭示了碳利用的潜力。CaO2 产生的碱性环境促进了这些结果的实现。回收的固体含有母体化合物中的大部分磷和碳。最终,这些发现为高级氧化工艺的开发和应用提供了变革性的新见解,从而避免了与矿化产物(尤其是无机磷和碳)相关的下游问题。
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UV-activated calcium peroxide system enables simultaneous organophosphorus degradation, phosphate recovery, and carbon fixation.

Advanced oxidation processes are a desirable technology for treatment of contaminants of emerging concern. Nevertheless, conventional advanced oxidation of organophosphorus compounds releases inorganic phosphate, posing downstream concerns related to eutrophication. For this reason, we evaluated the ultraviolet light-activated calcium peroxide (UV/CaO2) system for effective treatment of organophosphorus compounds and concurrent capture of the mineralization products, phosphate. The degradation mechanisms, reaction kinetics, and mineralizations were assessed to determine the overall efficiency and performance of the UV/CaO2 process. Knowledge gaps related to photocatalysis in the UV/CaO2 system were not only addressed, but also leveraged to identify unique advantages for removal of organophosphorus compounds and their degradation products. Experimental results confirmed that the UV/CaO2 system effectively mineralized organophosphorus compounds and recovered inorganic phosphate; additionally, collaborative carbon fixation performance of the system reveals the potential of carbon utilization. These outcomes were facilitated by the alkaline environment generated by CaO2. The recovered solids contained most of the phosphorus and carbon from the parent compounds. Ultimately, these findings provide transformative, new insights into the development and application of advanced oxidation processes that prevent downstream concerns related to mineralization products, especially inorganic phosphorus and carbon.

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