【摘 要】
：
The present study evaluated a photo-Fenton reactive membrane that achieved enhanced 1,4-Dioxane removal performance.As a common organic solvent and stabilizer,1,4-Dioxane is widely used in a variety of industrial products and poses negative environmental
【机 构】
：
School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266033,Ch
论文部分内容阅读
The present study evaluated a photo-Fenton reactive membrane that achieved enhanced 1,4-Dioxane removal performance.As a common organic solvent and stabilizer,1,4-Dioxane is widely used in a variety of industrial products and poses negative environmental and health impacts.The membrane was prepared by covalently coating photocatalyst of goethite (α-FeOOH) on a ceramic porous membrane as we reported previously.The effects of UV irradiation,H2O2 and catalyst on the removal efficiency of 1,4-Dioxane in batch reactors were first evaluated for optimized reaction conditions,followed by a systematical investigation of 1,4-Dioxane removal in the photo-Fenton membrane filtration mode.Under optimized conditions,the 1,4-Dioxane removal 2)rate reached up to 16％ with combination of 2 mmol/L H2O2 and UV365 irradiation (2000 μW/cm2) when the feed water was filtered by the photo-Fenton reactive membrane at a hydraulic retention time of 6 min.The removal efficiency and apparent quantum yield (AQY) were both enhanced in the filtration compared to the batch mode of the same photo-Fenton reaction.Moreover,the proposed degradation pathways were analyzed by density functional theory (DFT) calculations,which provided a new insight into the degradation mechanisms of 1,4-Dioxane in photo-Fenton reactions on the functionalized ceramic membrane.
其他文献
This study evaluates the applicability of nano-sized calcium peroxide (CaO2) as a source of H2O2 to remediate 2,4-dichlorophenol (2,4-DCP) contaminated groundwater via the advanced oxidation process (AOP).First,the effect and mechanism of 2,4-DCP degradat
The current study evaluated the effects of oxalic acid (OA) application on the growth and Mn phytoremediation efficiency of Polygonum pubescens Blume cultivated in three different manganese(Mn)-contaminated soils sampled from an unexplored area (US),an ex
In this study,the effects of organic sulfur on anaerobic biological processes were investigated by operating two up-flow anaerobic sludge blanket (UASB) reactors with sodium dodecylbenzene sulfonate (SDBS) as a representative of organic sulfur.The results
摘要：开敞空间在城市规划中的定义是，为了保证环境质量和景观需要，在城市地区保留一定的不得建造的空旷地段。它包括山林农田、河湖水体、各种绿地等的自然空间，它负担着城市多样的生活活动、生物的自然消长、隔离避灾、通风导流、表现地景，以及限制城市无限蔓延等多重功能。亦是展现生态的、社会的、文化的、经济的等多重目标的载体。现实中的开发区为了追求平坦宽敞的地块特质，将错落有致的山地地形整治成平原式地形。重庆是
The role of norfioxacin (NOR) and sulfamethoxazole (SMX) in mesophilic and thermophilic anaerobic digestion (AD) of pig manure,with respect to methane production and variations in the microbial community and resistance genes,including antibiotic resistanc
In this study,the influences of sulfidation on zero-valent iron (ZVI) performance toward As(Ⅴ)immobilization in soil were systemically investigated.It was found that,compared to unamended ZVI,sulfidated ZVI (S-ZVI) is more favorable to immobilize As(Ⅴ) in
费孝通在《乡土中国》等著作中讨论中国现代化时强调,中国社会是乡土性的,农民是“中国社会的基层”.这是事实,也是中国的国情.很长时间以来,费先生所说的“土气”及其沿袭一直在很大程度上困扰着中国社会现代化,其中表现最突出的就在极其复杂的“三农”问题之中.
近年来,随着城市化的快速发展,城市水循环过程发生巨大改变,极端降雨事件频发、径流总量和径流系数增大、城市暴雨内涝风险增加.城市洪涝模型作为城市雨水管网规划设计的重要工具,应用已越来越广泛.以北京大兴国际机场为研究对象,通过构建城市洪涝模型,对雨水管道排水能力评估及洪涝淹没深度分析,提出机场雨水智慧管理策略,不断优化提高雨水系统方案应对内涝风险的能力.同时构建雨水智慧管理平台,采用数字化手段实现风险点识别和设备远程控制,制定内涝风险对策与防涝应急措施,全面保障机场汛期安全运营,为民航机场的雨水系统管控提供参
龙首渠引洛古灌区位于陕西省渭南市,系洛惠渠灌区的前身,距今2100余年,为中国历史上著名的集惠农灌溉、盐碱地改良等多功能于一体的综合性水利工程.rn龙首渠是自汉代以来中国农耕文明史和水利发展史的见证.作为北洛河流域最早、最宏伟的自流灌溉工程,它肇始于西汉,后筑陂于三国,重开于北周,引洛灌溉显效于唐,不绝于宋元,泉溉于明清,重修于民国而振兴于当代;它源起汉武盛世治水,助力曹魏统一中原,襄赞北周征发北齐,佐证大唐盛世气象,匡助民国渡过年馑,在中华民族大一统的进程中,发挥了不可替代的作用.
Transparent exopolymer particles (TEPs) are a class of transparent gel-like polysaccharides,which have been widely detected in almost every kind of feed water to membrane systems,including freshwater,seawater and wastewater.Although TEP have been thought