Chokejaroenrat Chanat, Sakulthaew Chainarong, Angkaew Athaphon, Pattanateeradetch Apiladda, Raksajit Wuttinun, Teingtham Kanokwan, Phansak Piyaporn, Klongvessa Pawee, Snow Daniel D, Harris Clifford E, Comfort Steve D
Department of Environmental Technology and Management, Faculty of Environment, Kasetsart University, Bangkok 10900, Thailand.
Department of Veterinary Technology, Faculty of Veterinary Technology, Kasetsart University, Bangkok 10900, Thailand.
Antibiotics (Basel). 2023 Jul 5;12(7):1151. doi: 10.3390/antibiotics12071151.
The amount of antibiotics and personal care products entering local sewage systems and ultimately natural waters is increasing and raising concerns about long-term human health effects. We developed an adsorptive photocatalyst, CuMnFeO nanoparticles, utilizing co-precipitation and calcination with melamine, and quantified its efficacy in removing paraben and oxytetracycline (OTC). During melamine calcination, CuMnFeO recrystallized, improving material crystallinity and purity for the adsorptive-photocatalytic reaction. Kinetic experiments showed that all four parabens and OTC were removed within 120 and 45 min. We found that contaminant adsorption and reaction with active radicals occurred almost simultaneously with the photocatalyst. OTC adsorption could be adequately described by the Brouers-Sotolongo kinetic and Freundlich isotherm models. OTC photocatalytic degradation started with a series of reactions at different carbon locations (i.e., decarboxamidation, deamination, dehydroxylation, demethylation, and tautomerization). Further toxicity testing showed that L. and L. shoot indexes were less affected by treated water than root indexes. The L. endodermis thickness and area decreased considerably after exposure to the 25% (/)-treated water. Overall, CuMnFeO nanoparticles exhibit a remarkable adsorptive-photocatalytic performance for the degradation of tested antibiotics and personal care products.
进入当地污水系统并最终流入天然水体的抗生素和个人护理产品数量不断增加，引发了人们对其对人类健康长期影响的担忧。我们利用共沉淀法并与三聚氰胺一起煅烧，开发了一种吸附性光催化剂——CuMnFeO纳米颗粒，并对其去除对羟基苯甲酸酯和土霉素（OTC）的效果进行了量化。在三聚氰胺煅烧过程中，CuMnFeO重结晶，提高了材料的结晶度和纯度，有利于吸附-光催化反应。动力学实验表明，所有四种对羟基苯甲酸酯和OTC在120分钟和45分钟内被去除。我们发现，污染物的吸附以及与活性自由基的反应几乎与光催化剂同时发生。OTC的吸附可以用Brouers-Sotolongo动力学模型和Freundlich等温线模型进行充分描述。OTC的光催化降解始于不同碳位置的一系列反应（即脱羧酰胺化、脱氨基、脱羟基、脱甲基和互变异构）。进一步的毒性测试表明，与根部指标相比，处理后的水对生菜和黑麦草地上部分指标的影响较小。暴露于25%（/）处理后的水后，生菜内皮层厚度和面积显著减小。总体而言，CuMnFeO纳米颗粒在降解受试抗生素和个人护理产品方面表现出显著的吸附-光催化性能。
