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Occurrences of Glucocorticoids in Aquatic Environment and Their Removal during Wastewater Treatment

Journal of Donghua University(English Edition) 2023年第3期40卷 293-318页

作者：吴清晨吴世闵张茵茵 andere clement miruka 朱大海张艾刘亚男薛罡 College of Environmental Science and Engineering Donghua UniversityShanghai 201620China Department of Chemical and Environmental Engineering University of ArizonaArizona AZ 85721-0011United States

Glucocorticoids(GCs) are a group of endocrine-disrupting compounds(EDCs) frequently prescribed against various medical ***,GCs have been shown to be effective in managing septic shock in patients infected with the 2019 novel coronavirus(COVID-19).Due to colossal consumption and potential risks to aquatic organisms,GCs have immensely attracted the focus of the scientific research community as a water ***,the aim of this paper is to review the current knowledge on the occurrence of various GCs in the aquatic environment and their removal during wastewater treatment.A variety of GCs are ubiquitous in surface water,hospital wastewater,and sewage water *** the minimum concentration in volume is below 0.01 ng/L,and the maximum one is 10 000 ng/L,and enter the environment through hospital and urban wastewater *** with natural GCs,higher risks to aquatic environments could be induced by synthetic *** current activated sludge processes used in wastewater treatment plants(WWTPs) are not fully effective in eliminating GCs,some of which may further increase the risk of GC in the *** comparison with the aerobic process in WWTPs,the anaerobic and anoxic processes were found to be more efficient for GC *** the studied GCs,fluticasone propionate,clobetasol propionate,fluocinolone acetonide,and triamcinolone acetonide need more attention due to their low removal efficiencies and strong *** the advanced treatment processes,reverse osmosis,ultraviolet irradiation,CaO_(2),and plasma could achieve significant GC activity removal while micro/ultra-filtration,chlorination,and ozonation were less efficient.

关键词： glucocorticoid(GC) endocrine disrupting compound(EDC) wastewater treatment plant(WWTP) advanced wastewater treatment

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NC型面磨削温度取决于砂轮

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现代制造 2012年第17期 72-73页

作者： DirkBiermann andere

NC型面磨削用于加工自由面工件的表面。研究结果表明，NC型面磨削的热负荷具有与CBN各种陶瓷砂轮相类似的曲线。磨哨是切削加工流程的最后一道工序。待加工的工件在此前已经经历了多个加工步骤，因此其价值也已经有了大幅度的上升。鉴... 详细信息

NC型面磨削用于加工自由面工件的表面。研究结果表明，NC型面磨削的热负荷具有与CBN各种陶瓷砂轮相类似的曲线。磨哨是切削加工流程的最后一道工序。待加工的工件在此前已经经历了多个加工步骤，因此其价值也已经有了大幅度的上升。鉴此，在磨削加工过程中必须避免任何工艺不安全性。多特蒙德工业大学切削加工学院（ISF）目前致力于对NC型面磨削流程与设备的交互影响的研究。开发该工艺的目的在于通过NC数据控制的列式进给，实现对复杂外形表面的加工。NC型面磨削的特征在于刀具造型和磨削过程的动力特性。

关键词：磨削温度陶瓷砂轮 NC 型面加工流程切削加工一道工序不安全性

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