高职《会展服务与管理》课程三元模式的构建

三元模式是高等职业教育改革的一条重要途径。通过把三元模式与《会展服务与管理》课程相结合,具体细化三元模式的实践应用,深化《会展服务与管理》课程三元模式的内涵,重点对高等职业教育《会展服务与管理》课程三元模式的实现途径进行了探讨,包括整合教育资源、独创性的课程设计、采用“双导师”制授课、研究教学活动特点等方面。     

典型城市污水处理厂污泥无机质含量及含砂率分析

对青岛5个典型城市污水处理厂污泥无机质含量与含砂率进行了调查研究,结果表明,以生活污水为主的A厂(90%为生活污水)和B厂(85%为生活污水)的污泥无机质含量在20%³0%,而以工业废水为主的C厂(50%为工业废水)、D厂(50%为工业废水)和E厂(70%为工业废水)的污泥无机质含量在50%30%,而以工业废水为主的C厂(50%为工业废水)、D厂(50%为工业废水)和E厂(70%为工业废水)的污泥无机质含量在50%⁷0%;各污水厂污泥含砂率相差较大,而且污泥无机质含量较高的C厂、D厂和E厂,其含砂率普遍较高,而污泥无机质含量较低的A厂和B厂,其含砂率也较低。对其中砂质进行粒径分布与显微检测分析,并对污泥含砂特性进行了深入探讨,结果表明,各污水处理厂污泥含砂主要为淡黄色硅质无机砂质颗粒和黑色磁性无机砂质颗粒,各污水处理厂污泥含砂属性主要与污水处理厂服务区域的地理环境以及进水性质有关。     

电解锰阳极泥特性及除铅初步研究

以电解锰阳极泥作为研究对象,采用X射线能谱法和微波消解——火焰原子吸收法分别测定电解锰阳极泥主要含有Mn、Pb、Fe、Ca、Cr、K、Se等金属元素及其含量,并且按水平振荡法、硫酸硝酸法和醋酸缓冲溶液法三种方法对电解锰阳极泥进行浸出毒性实验,结果显示,浸取液中Se和Pb含量均超过浸出毒性标准限值。此外,对经水洗、湿磨和烘干后的电解锰阳极泥样品进行了热重分析。结果表明:在550℃以后发生的分解反应,同时其晶型结构也发生了改变;650℃之后,热重曲线趋于平缓,晶体结构比较稳定。最后,探索了电解锰阳极泥除铅的工艺路线,通过正交实验确定了最优除铅条件,最优条件下所制备样品结晶度高,且Mn2O3含量为96.7%以上。     

Disinfection byproduct precursor removal by enhanced coagulation and their distribution in chemical fractions

Raw water from the Songhua River was treated by four types of coagulants, ferric chloride(FeCl3), aluminum sulfate(Al2(SO4)3),polyaluminum chloride(PACl) and composite polyaluminum(HPAC), in order to remove dissolved organic matter(DOM). Considering the disinfection byproduct(DBP) precursor treatability, DOM was divided into five chemical fractions based on resin adsorption.Trihalomethane formation potential(THMFP) and haloacetic acid formation potential(HAAFP) were measured for each fraction. The results showed that hydrophobic acids(HoA), hydrophilic matter(HiM) and hydrophobic neutral(HoN) were the dominant fractions.Although both HoN and HoA were the main THM precursors, the contribution for THMFP changed after coagulation. Additionally,HoA and HiM were the main HAA precursors, while the contribution of HoN to HAAFP significantly increased after coagulation.HoM was more easily removed than HiM, no matter which coagulant was used, especially under enhanced coagulation conditions.DOC removal was highest for enhanced coagulation using FeCl3 while DBPFP was lowest using PACl. This could indicate that not all DOC fractions contained the precursors of DBPs. Reduction of THMFP and HAAFP by PACl under enhanced coagulation could reach51% and 59% respectively.     

One-dimensional recoverable ZnFe2O4/C/MnO2/BiOI magnetic composite with enhanced photocatalytic performance for organic dyes degradation

Environmental Science and Pollution Research - Excessive discharge of toxic dyes is detrimental to ecological system and human health. Therefore, an effective photocatalyst must be designed and...     

Effect of particulate matters on inactivation of bacteriophage MS2 under irradiation above 320 nm

Environmental Science and Pollution Research - The inactivation of bacteriophage MS2 under irradiation above 320 nm was investigated, focusing on different solution pH, ionic strength, and...     

甲硫醇高效降解菌的筛选

利用平板分离技术 ,以甲硫醇为降解基质从农药废水生化池活性污泥中分离出 1种异养菌和 1种真菌。根据菌种的耐碱度实验和降解力实验 ,表明真菌的降解能力相当强 ,而按 1∶3比例配成的混合菌种降解效果最好。经分析 ,活性污泥菌胶团强大的吸附能力、真菌高效的分解能力以及混合菌群中各菌种的互生、共生关系起到了很好的协同作用 ,使降解效果大大提高。从菌落形态和显微镜观察到的菌体结构与形态情况看 ,初步确定该真菌属于子囊菌。     

顶空-气相色谱法测定水中苯系物的不确定度研究

建立顶空-气相色谱法测定水中苯系物不确定度的评定方法,分析测定过程中的主要影响因素,评定测定过程中引入不确定度的来源.通过分析和量化影响测定结果的不确定度分量,得出各分量对不确定度的相对贡献,对测定结果进行了表述.结果表明,顶空-气相色谱法测定水中苯系物七种组分的相对合成不确定度范围为6.09％ ∽ 11.11％,苯乙烯和邻二甲苯的不确定度较大,不确定度的主要影响因素为标准溶液及曲线配制、方法加标回收和样品重复测量.     

基于PPC-AHP-DM法的辽宁省整治修复海岛开发潜力评价研究

本文选取辽宁省在《中华人民共和国海岛保护法》颁布以来实施的17个整治修复海岛开展开发潜力评价,建立6大类23个指标因子的评价指标分类体系,选取PPC-AHP-DM组合模型对各海岛开发潜力进行了横向静态分析与对比,确定了各海岛在整治修复工程实施前后开发潜力综合排名及自身开发潜力变化幅度。研究结果表明:整治修复工程实施前大笔架山岛相对于其他海岛排名较为靠前,张家山岛、杨家山岛排名较为靠后,整治修复工程实施后各海岛相对于自身开发潜力均有不同幅度提升,整治修复工程类型不同,其提升幅度各异,大笔架山岛、觉华岛、张家山岛、杨家山岛等开发潜力提升幅度较大。