Instituto Tecnológico Superior de Rioverde, Ma del Rosario, San Ciro de Acosta-Rioverde 165, CP 79610, Rioverde, SLP, Mexico.
Centro de Investigación Y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, 78260, San Luis Potosí, Mexico.
Environ Sci Pollut Res Int. 2023 Aug;30(39):90741-90756. doi: 10.1007/s11356-023-28653-z. Epub 2023 Jul 18.
Water pollution is a current global concern caused by emerging pollutants like nonylphenol (NP). This endocrine disruptor cannot be efficiently removed with traditional wastewater treatment plants (WTPs). Therefore, this work aimed to evaluate the adsorption influence of molecularly imprinted polymers (MIPs) on the oxidative degradation (ozone and ultraviolet irradiations) of 4-nonylphenol (4-NP) and its by-products as a coadjuvant in WTPs. MIPs were synthesized and characterized; the effect of the degradation rate under system operating conditions was studied by Box-Behnken response surface design of experiments. The variables evaluated were 4-NP concentration, ozone exposure time, pH, and MIP amount. Results show that the MIPs synthesized by co-precipitation and bulk polymerizations obtained the highest retention rates (> 90%). The maximum adsorption capacities for 4-NP were 201.1 mg L and 500 mg L, respectively. The degradation percentages under O and UV conditions reached 98-100% at 120 s of exposure at different pHs. The degradation products of 4-NP were compounds with carboxylic and ketonic acids, and the MIP adsorption was between 50 and 60%. Our results present the first application of MIPs in oxidation processes for 4-NP, representing starting points for the use of highly selective materials to identify and remove emerging pollutants and their degradation by-products in environmental matrices.
水污染是当前全球关注的一个问题，由壬基酚（NP）等新兴污染物引起。传统的污水处理厂（WTP）无法有效去除这种内分泌干扰物。因此，这项工作旨在评估分子印迹聚合物（MIPs）对 4-壬基酚（4-NP）及其氧化降解（臭氧和紫外线辐照）产物的吸附影响，作为 WTP 的辅助手段。合成并表征了 MIPs；通过 Box-Behnken 响应面实验设计研究了系统运行条件下降解速率的影响。评估的变量是 4-NP 浓度、臭氧暴露时间、pH 值和 MIP 量。结果表明，共沉淀和本体聚合合成的 MIPs 获得了最高的保留率（>90%）。4-NP 的最大吸附容量分别为 201.1 mg/L 和 500 mg/L。在不同 pH 值下，暴露 120 s 后，O 和 UV 条件下的降解率达到 98-100%。4-NP 的降解产物为含有羧酸和酮酸的化合物，MIP 吸附率在 50-60%之间。我们的结果首次将 MIPs 应用于 4-NP 的氧化过程，为使用高选择性材料在环境基质中识别和去除新兴污染物及其降解产物提供了起点。
