教学课程资源库 更多>>

关键词： 制药工程   分离技术   萃取技术  

摘要： 制药分离是制药工程中的一项重要技术。该技术能够对药物中的有效活性成分及杂物组成成分进行对比分析,从而影响着药品是否能够制作成功。基于此,本文对制药工程发现现状进行分析,列举了目前常用的制药分离技术,对分离技术的应用进行详细论述。

关键词： Superwetting membrane   Polyelectrolyte complex   Metal-phenolic networks   In situ assembly   Oil   water separation  

摘要： Utilizing membrane to deal with the issues of oily wastewater discharge from the processing of petroleum or gas products, oil field exploitation and oil leakage has been widely concerned. Superwetting membrane materials have hold great promising for oil/water separation in recent years. However, a facile strategy to design superwetting membranes with specific micro- and nanostructures is still challenging. In this study, we develop superhydrophilic polycation-polyphenol-metal composite membranes via a facile in situ polyphenol assembly strategy. The assembly of polyphenol (tannic acid, TA)-polycation (polyethyleneimine, PEI) polyelectrolyte complex into nanoconjugates aims to construct a nanostructured coating, and the further complexation of metal ions (M) aims to assemble metal-phenolic networks into TA-PEI nanoconjugates. The resulting dual cross-linked TA-PEI/M composite coatings on polyvinylidene fluoride (PVDF) membrane surfaces show nanopapillae-like structures and excellent superhydrophilicity. The superhydrophilicity of the PVDF/TA-PEI/M membranes greatly promote membrane permeability by more than 100%. The superhydrophilic PVDF/TA-PEI/M membranes are also underwater superhydrophobic. The opposite wettability towards water and oil for the PVDF/TA-PEI/M membranes promises their outstanding oil/water separation efficiency (flux above 3000 L/m2h and oil rejection above 99.5%) and anti-oil-fouling performance. Moreover, the representative PVDF/TA-PEI/Ti4+ membrane also exhibits outstanding chemical and long-term stability thanks to the robust dual cross-linking. This work provides a novel and effective polyphenol-polycation-metal complexation strategy to design and fabricate superwetting membrane for oil/water separation.

关键词： Segregation engineering   High entropy alloy   Annealing   Twins   Ductility  

摘要： Segregation engineering (SE) can optimize the microstructure and improve the properties of traditional alloys. AlCoCrFeNi2.1 alloy has been declared as a promising superalloy. Mo can improve high temperature performance, AlCoCrFeMo0.05Ni2 alloy has been developed. To evaluate the SE in AlCoCrFeMo0.05Ni2 HEA, annealing process of the alloy was investigated. The experimental results showed that a large number of metastable phases were formed at the lattice defects in the as-cast alloy during annealing. And the main phase of the alloy annealed at 800 degrees C for 72 h changed from FCC to BCC structures. Moreover, a large number of dislocations and stacking faults were formed in the (Ni, Al)-rich BCC new phase, and finally turned into nanocrystals or twins. At the same time, the (Cr, Mo)-rich BCC phase changed from spherical to rod, square and dish-like during the annealing. The growth of the (Cr, Mo)-rich BCC phase and the mutual restriction of different phases resulted in the refinement of the (Ni, Al)-rich BCC phase during annealing. The high temperature ductility of the alloy has been improved significantly. At 700 degrees C, its elongation reached 80%, while the strength had still up to 500 MPa. (C) 2021 Elsevier B.V. All rights reserved.

关键词： Lipids   Wetting   Layers   pH   Water treatment  

摘要： Sand, an abundant resource from the nature, is a promising candidate for oil/water separation. Herein, raw sand was designed with switchable surface wettability to enable recyclability and versatility in practical oil/water separation. The "smart" sand was fabricated by grafting pH-responsive poly(4-vinylpyridine) (P4VP) and oleophilic/hydrophobic octadecyltrimethoxysilane (OTS) onto its surface. The decorated sand can be used as the oil sorbent for controllable oil sorption and desorption in response to different pHs, as well as a filter to selectively separate either oil or water on demand. This novel design offers an intelligent, low-cost, large-scale, and highly efficient route to potentially settle the issues of industrial oily wastewater and oil spill.

关键词： 分离工程   课程思政   绿色工程  

摘要： 分离工程是化工类专业的核心课程,在该专业的人才培养中起着至关重要的作用。文章介绍了分离工程课程思政的教学目标和相应的教学内容、教学方法。基于绿色工程教育的理念,提出课程对绿色工程十二项原则的支撑内容;深度融合信息技术,在原有MOOC的基础上,建设了专门的课程思政MOOC;通过历史记载、科学家的故事、案例教学等形式,培养学生的文化自信、价值观、工程伦理意识和创新精神。文章以期为化工类专业课程思政教学提供参考和借鉴。

关键词： 快速   经济   环保   桩头   整体分离技术  

摘要： 传统的桩头破除方法为人工或人工辅助小型机械,是一种落后的桩头破除施工工艺,不仅容易造成桩头不平整,桩头钢筋存弯曲损伤等质量问题,而且速度慢、效率低,耗用人工、机械设备较多,噪声大、灰尘多等问题,与现在的施工项目要求的高效施工存在较大差距,本文介绍一种快速、经济、环保的桩头整体分离施工技术。

关键词： 环境工程   膜分离技术   应用分析  

摘要： 膜分离技术在我国环境工程发展过程中发挥着十分重要的作用,在一定程度上为环境工程建设提供帮助。基于不断发展的环境工程,也进一步提高了对膜分离技术的使用要求,因此,促进膜分离技术的创新发展,对环境工程建设而言至关重要。本文将立足环境工程,重点分析膜分离技术的具体应用。

关键词： 水处理   环境工程   膜分离技术   应用  

摘要： 随着时代的发展,水资源缺乏、水资源污染逐渐让人们意识到高效利用水资源、节约水资源的重要性。环境工程水处理是水资源的再生过程,因此如何在这个过程中利用相关技术提升水资源利用率,降低水资源污染值得深思。超滤技术可以有效去除水中的微粒、胶体、热源以及各种有机物质,与传统的分离技术相比,超滤处理工艺是在常温下进行,适合对药物、酶、果汁等进行分离,且处理过程中不需要加热和添加化学试剂,不会产生污染,操作简单、去除率高、运行成本低,因此,广泛应用在环境工程水处理工艺中。

关键词： 生物分离工程   酿酒工程   教学改革   教学知识体系   教学方法  

摘要： 《生物分离工程》为我校酿酒工程专业必修课程。根据学科特点及学生专业知识储备情况,从教材的选择、教学内容的优化对教学知识体系进行了设置;以案例教学法、虚拟仿真教学法为主要教学手段,积极构建线上教学资源,拓宽学生学习途径;探索课程思政元素的导入,进行全方位的育人。课程取得了较好的教学效果。

关键词： 应急控源截污   曝气生物滤池   脱氮除磷   超磁分离   悬浮物  

摘要： 某污水处理厂因超负荷运行导致污水溢流,且受到占地、建设周期等因素制约,经过比选最终选择了超磁分离与无堵塞曝气生物滤池(BAF)组合工艺用于应急处置。介绍了该组合工艺的技术特点、技术参数、工艺流程、调试运行要点。该系统自2018年通水后,出水水质稳定达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准,累计削减COD约224.2 t、SS约29.2 t、总磷约5 t、氨氮约41.8 t。该工艺投资成本约2 645万元,运行费用约1.08元/m^(3)(不含投建费用),节省环保税约88.06万元。实践证明,该工艺在受到占地面积、施工周期等因素制约时仍能较好地发挥高品质应急控源截污作用,具有较强的技术可行性和一定的经济性。