创新的高铁酸盐(VI)缓释复合材料,用于控制水中藻类衍生的消毒副产物

IF 7.7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Kai Zhang , Cong Li , Guozijian Wei , Yulin Bian , Xiaohong Guan , Yiting Qi , Min Xia , Qing Jiang
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引用次数: 0

摘要

本研究提出了一种利用石蜡或β-环糊精包覆高铁酸钾(K2FeO4)复合材料处理水处理中藻类诱导的消毒副产物(DBPs)的新方法。包封技术显著提高了Fe(VI)的稳定性,实现了Fe(VI)的可控释放,减轻了Fe(VI)的快速自分解和氧化过度反应。采用熔融悬浮和主客体包封法制备复合材料,石蜡包封率为90%(质量比为7:1),β-环糊精包封率为70%。缓释动力学遵循非菲克扩散模型(R2 >;0.98),在优化的3:1涂层比例下,120分钟内累积释放量为46% - 53%。使用涂层Fe(VI)预氧化可减少总dbp 60%,在控制溴化物种方面优于未涂层Fe(VI)(三溴甲烷对细胞内有机物的还原率为67.15%)。三维荧光和紫外光谱分析证实了藻类衍生的芳香蛋白、黄腐酸和腐殖质物质的有效降解。β-环糊精复合材料表现出优异的pH适应性(6-9)和毒性降低,通过控制前体降解,将诱变性和生物浓度因子降低了48 - 53%。涂层介导的释放最小化了藻类细胞裂解,与未涂层系统相比,减少了49%的细胞内有机释放。该研究将高铁酸盐涂层复合材料作为一种结合氧化和混凝的双功能解决方案,在受藻类影响的水域中提供增强的dbp控制,同时解决Fe(VI)不稳定性的限制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Innovative sustained-release Ferrate(VI) composites for controlling algal derived disinfection by-products in waters

Innovative sustained-release Ferrate(VI) composites for controlling algal derived disinfection by-products in waters
The study presents a novel approach to tackling algal-induced disinfection byproducts (DBPs) in water treatment using potassium ferrate (K2FeO4) composites coated with paraffin or β-cyclodextrin. The encapsulation technology significantly enhances Fe(VI) stability and enables controlled release, mitigating rapid self-decomposition and oxidative overreaction. Composite materials were synthesized via melt suspension and host-guest encapsulation, achieving encapsulation efficiencies >90 % for paraffin (mass ratio 7:1) and 70 % for β-cyclodextrin. Sustained-release kinetics followed non-Fickian diffusion models (R2 > 0.98), with optimized 3:1 coating ratios yielding 46–53 % cumulative release over 120 min. Pre-oxidation using coated Fe(VI) reduced total DBPs by 60 %, outperforming uncoated Fe(VI) in controlling brominated species (Tribromomethane reduction: 67.15 % for intracellular organics). Three-dimensional fluorescence and UV spectroscopy analysis confirmed effective degradation of algal-derived aromatic proteins, fulvic acids, and humic substances. β-Cyclodextrin composites demonstrated superior pH adaptability (6–9) and toxicity reduction, lowering mutagenicity and bioconcentration factors by 48–53 % via controlled precursor degradation. Coating-mediated release minimized algal cell lysis, reducing intracellular organic release by 49 % compared to uncoated systems. The study establishes ferrate-coated composites as a dual-functional solution combining oxidation and coagulation, offering enhanced DBPs control in algae-impacted waters while addressing Fe(VI) instability limitations.
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来源期刊
Environmental Research
Environmental Research 环境科学-公共卫生、环境卫生与职业卫生
CiteScore
12.60
自引率
8.40%
发文量
2480
审稿时长
4.7 months
期刊介绍: The Environmental Research journal presents a broad range of interdisciplinary research, focused on addressing worldwide environmental concerns and featuring innovative findings. Our publication strives to explore relevant anthropogenic issues across various environmental sectors, showcasing practical applications in real-life settings.
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