原位Fenton耦合微纳米气泡降解酸性矿山废水有机物特性研究  

Study on the degradation of organic matter in acid mine wastewater by an in-situ Fenton coupled micro-nano bubbles process

作　　者：杨超[1] 李福星 杨丽静[1] 武栋平 杨亮亮 李丹[1] 卜显忠[1] YANG Chao;LI Fuxing;YANG Lijing;WU Dongping;YANG Liangliang;LI Dan;BU Xianzhong(School of Resource Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学资源工程学院,西安710055

出　　处：《安全与环境学报》2025年第2期706-713,共8页Journal of Safety and Environment

基　　金：陕西省自然科学基金项目(2024JC-YBQN-0097);国家自然科学基金项目(52074206,52374278);陕西省技术创新引导专项(2023GXLH-054)。

摘　　要：针对酸性矿山废水(Acid Mine Drainage,AMD)中有机物威胁生态环境的问题,研究基于AMD自身呈酸性和Fe^(2+)含量高的特点,仅在外加H_(2)O_(2)和微纳米气泡(Micro Nano Bubbles,MNBs)的条件下构建原位Fenton耦合MNBs(FT+MNBs)反应体系,以处理AMD中的有机物。此外,对反应时间、Fe^(2+)与H2O_(2)物质的量比、pH值、进气流量等操作条件进行优化,并探究体系对有机物的去除效果及机理。结果显示:当反应时间为15 min,Fe^(2+)与H_(2)O_(2)物质的量比为1∶7,pH值为4,进气流量为60 mL/min时,原位FT+MNBs对AMD中总有机碳(Total Organic Carbon,TOC)的去除率为66.03%。通过机理分析可知,原位Fenton耦合MNBs体系对类溶解性微生物代谢产物的降解效果明显优于单独原位FT和单独MNBs,原因在于原位Fenton耦合MNBs体系可以产生更多的·OH,并将有机物中的C—C、C—H、C—N以及C—O键断裂,增加C—O、O—CO等含氧官能团含量,进而将其进一步分解后矿化为CO_(2)和H_(2)O后去除。To effectively treat organic matter in Acidic Mine Drainage(AMD),this study developed an in-situ Fenton process coupled with a Micro-Nano Bubbles(MNBs)system,leveraging the low pH and Fe^(2+)characteristics present in AMD.The reaction time,Fenton ratio,pH value,and air flow rate conditions were optimized.The organic matter was analyzed before and after treatment using EEMs,UV vis,FT IR,and XPS to investigate the system's removal efficiency and the underlying mechanism for organic matter degradation.The results indicate that when the reaction time is set to 15 minutes,the Fenton ratio is 1:7,the pH is maintained at 4,and the air flow rate is 60 mL/min,the in-situ FT+MNBs system can achieve a TOC removal rate of 66.03%in AMD.This is 17.42 percentage points and 10.82 percentage points higher than the TOC removal rates achieved under the optimal conditions for the in-situ FT alone and the in-situ MNBs alone,respectively.EEMs analysis reveals that both the in-situ FT alone and the in-situ MNBs alone exhibit limited degradation effects on dissolved microbial metabolites.In contrast,the in-situ FT+MNBs system demonstrates significant degradation of these compounds.UV vis analysis shows that the in-situ FT+MNBs system effectively degrades aromatic organic matter in water.UV vis analysis indicates that the in-situ FT+MNBs system effectively degrades aromatic organic matter in water.FT IR and XPS analyses further reveal that the in-situ FT+MNBs disrupt the functional groups of the organic matter,breaking C—C,C—H,C—N,and C—O bonds.This process increases the concentration of oxygen-containing functional groups such as O—C=O,leading to further decomposition and mineralization into CO_(2) and H_(2)O,thereby facilitating their removal.Detection of H_(2)O_(2) content indicates that MNBs enhance the decomposition rate of H_(2)O_(2),thereby promoting the effectiveness of the in-situ Fenton system.

关 键 词：环境工程学 芬顿 微纳米气泡 酸性矿山废水 有机物 

分 类 号：X52[环境科学与工程—环境工程]