将新型 ZnCo2O4 嵌入接枝废聚苯乙烯泡沫作为 PMS 活化的异相催化剂降解有机污染物

IF 5.7 3区环境科学与生态学 Q1 WATER RESOURCES

Applied Water Science Pub Date : 2025-04-07 DOI:10.1007/s13201-025-02423-3

Asmaa A. Roshdy, Elsayed A. Elsharaky, Ahmed H. Elged, Abdelrahman M. Rabie

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引用次数: 0

摘要

本研究旨在利用不同负载量（10、15 和 30 wt %）的氧化钴锌（ZC）官能化废聚苯乙烯-甲基丙烯酸，通过原位聚合设计和制造高性能异构聚合物复合材料，分别称为 m-WZC10、m-WZC15 和 m-WZC30。此外，废聚苯乙烯（W）在没有氧化钴锌的情况下进行了甲基丙烯酸接枝，作为对照参考材料，称为 m-W，以评估加入氧化钴锌对复合材料结构和催化性能的影响。在催化去除废水流中的亚甲基蓝（MB）时，将合成的聚合物用于硫酸单质活化孔（PMS）。通过系统实验，我们比较了三种不同负载的 m-WZC 复合材料（m-WZC10、m-WZC15 和 m-WZC30），优化了主要降解参数，包括 PMS 剂量、pH 值、温度、甲基溴初始浓度和离子的影响。其中，m-WZC15 的性能最佳，在甲基溴初始浓度为 20 毫克/升的条件下，仅 10 分钟就能达到 99.89% 的甲基溴去除率。在 m-WZC15 的最佳条件下，研究进一步扩大了其范围，考察了它在降解其他污染物、甲基红（MR）、甲基橙（MO）、罗丹明 B（RB）和对硝基苯酚（PNP）方面的功效。催化反应表现出卓越的降解活性，对这些污染物的去除率分别达到 99.76%、99.0%、98.3% 和 97.8%。稳定性实验表明，m-WZC15 对甲基溴的降解率始终保持在较高水平，即使在循环 5 次之后也能达到 97%。此外，在整个实验周期中，晶相结构没有发生明显变化。在这些既定条件下合成的 m-WZC15 表现出显著的多功能性，有望成为水净化领域的候选物质。

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Organic pollutant degradation via novel ZnCo2O4-embedded grafted waste polystyrene foam as heterogeneous catalysts for PMS activation

This study aimed to design and fabricate high-performance heterogeneous polymeric composites via in-situ polymerization, utilizing waste polystyrene-co-methacrylic acid functionalized with zinc cobalt oxide (ZC) at varying loadings (10, 15 and 30 wt %), designated as m-WZC₁₀, m-WZC₁₅ and m-WZC₃₀ respectively. Additionally, waste polystyrene (W) underwent methacrylic acid grafting in the absence of zinc cobalt oxide, serving as a control reference material, denoted as m-W, to evaluate the impact of ZC incorporation on the composite’s structural and catalytic properties. The synthesized polymers were employed for poroxymonosulfate activation (PMS) in the catalytic removal of methylene blue (MB) from wastewater streams. Through systematic experimentation, we compared three different loadings of m-WZC composites (m-WZC₁₀, m-WZC₁₅, and m-WZC₃₀) by optimizing key degradation parameters, including PMS dose, pH, temperature, initial MB concentration, and the effect of ions. Among them, m-WZC₁₅ exhibited the optimal performance, achieving 99.89% MB removal within just 10 min at an initial MB concentration of 20 mg/L. Under the optimal conditions of m-WZC₁₅, the study further expanded its scope by investigating its efficacy in degrading other pollutants, methyl red (MR), methyl orange (MO), rhodamine B (RB), and p-nitrophenol (PNP). The catalysis exhibited excellent degradation activity, achieving removal rates of 99.76%, 99.0%, 98.3%, and 97.8% for these pollutants, respectively. Stability experiments revealed that the MB degradation rate achieved by the m-WZC₁₅ remained consistently high, reaching 97% even after 5 cycles. Furthermore, no noticeable changes were observed in the crystalline phase structure throughout the experimental cycles. The synthesized m-WZC₁₅ under these established conditions, demonstrated remarkable versatility and emerged as a promising candidate for water purification endeavors.