Kai Zhang , Cong Li , Guozijian Wei , Yulin Bian , Xiaohong Guan , Yiting Qi , Min Xia , Qing Jiang
{"title":"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","authors":"Kai Zhang , Cong Li , Guozijian Wei , Yulin Bian , Xiaohong Guan , Yiting Qi , Min Xia , Qing Jiang","doi":"10.1016/j.envres.2025.122415","DOIUrl":null,"url":null,"abstract":"<div><div>The study presents a novel approach to tackling algal-induced disinfection byproducts (DBPs) in water treatment using potassium ferrate (K<sub>2</sub>FeO<sub>4</sub>) 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 (R<sup>2</sup> > 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.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"285 ","pages":"Article 122415"},"PeriodicalIF":7.7000,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Innovative sustained-release Ferrate(VI) composites for controlling algal derived disinfection by-products in waters\",\"authors\":\"Kai Zhang , Cong Li , Guozijian Wei , Yulin Bian , Xiaohong Guan , Yiting Qi , Min Xia , Qing Jiang\",\"doi\":\"10.1016/j.envres.2025.122415\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The study presents a novel approach to tackling algal-induced disinfection byproducts (DBPs) in water treatment using potassium ferrate (K<sub>2</sub>FeO<sub>4</sub>) 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 (R<sup>2</sup> > 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.</div></div>\",\"PeriodicalId\":312,\"journal\":{\"name\":\"Environmental Research\",\"volume\":\"285 \",\"pages\":\"Article 122415\"},\"PeriodicalIF\":7.7000,\"publicationDate\":\"2025-07-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Environmental Research\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0013935125016676\",\"RegionNum\":2,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Research","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0013935125016676","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
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.
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.