Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China.
Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay, Guangzhou University, Guangzhou 510006, China.
Environ Sci Technol. 2023 Feb 21;57(7):2837-2845. doi: 10.1021/acs.est.2c09163. Epub 2023 Feb 11.
Improper disposal of waste biomass and an increasing number of emerging contaminants (ECs) in water environment are universal threats to the global environment. Here, we creatively propose a sustainable strategy for the direct resource transformation of livestock manure (LM) into an innovative catalyst (Fe-CCM) for water self-purification with zero external consumption. ECs can be rapidly degraded in this self-purification system at ambient temperature and atmospheric pressure, without any external oxidants or energy input, accompanied by HO and dissolved oxygen (DO) activation. The performance of the self-purification system is not affected by various types of salinity in the wastewater, and the corresponding second-order kinetic constant is improved 7 times. The enhanced water self-purification mechanism reveales that intermolecular forces between anions and pollutants reinforce electron exchange between pollutants and metal sites on the catalyst, further inducing the utilization of the intrinsic energy of contaminants, HO, and DO through the interfacial reaction. This work provides new insights into the rapid removal of ECs in complicated water systems with zero external consumption and is expected to advance the resource utilization of livestock waste.
废物生物质的不当处理和越来越多的新兴污染物（ECs）在水环境中是对全球环境的普遍威胁。在这里，我们创造性地提出了一种可持续的策略，将牲畜粪便（LM）直接转化为用于水自净化的创新催化剂（Fe-CCM），无需外部消耗。在这个自净化系统中，ECs 可以在环境温度和大气压下迅速降解，无需任何外部氧化剂或能源输入，同时伴随着 HO 和溶解氧（DO）的激活。自净化系统的性能不受废水中各种类型盐度的影响，相应的二级反应动力学常数提高了 7 倍。增强的水自净化机制表明，阴离子和污染物之间的分子间力加强了污染物与催化剂上金属位点之间的电子交换，进一步通过界面反应诱导污染物、HO 和 DO 的内在能量的利用。这项工作为在无需外部消耗的情况下快速去除复杂水系中的 ECs 提供了新的思路，并有望推进牲畜废物的资源化利用。
