【摘 要】
：
To improve the hydrophilieity and anti-fouling performance in water treatment,beth entrapped method and deposited method were used to modify polyvinylidene fluo
【机 构】
：
State Key Laboratory of Urban Water Resource and Environment,State Key Laboratory of Pollution Contr
【基金项目】
：
the Key Projects in the National Science & Technology Pillar Program in the Eleventh Five-year Plan Period;the National Creative Research Groups;the Key Scientific and Technological Project of Heilong
论文部分内容阅读
To improve the hydrophilieity and anti-fouling performance in water treatment,beth entrapped method and deposited method were used to modify polyvinylidene fluoride(PVDF)porous membrane with composite Al2O3/TiO2 nano-particles.Neat PVDF membrane was prepared and its property was also compared with that of the modified membranes.Membrane permeation flux and anti-fouling performance were measured using a membrane cell.The contact angle between water and membrane surface was detected in order to denote the membrane hydrophilicity.Membrane morphology and surface structure were examined by atomic-force microscopy (AFM)and scanning electron microscopy(SEM).Experimental results showed that modified membranes had higher permeation fluxes than that of the neat PVDF membrane.The addition of uano-particles altered membrane surface morphology and increased surface roughness.Due to the hydrophilicity of nano-particles,however,the membrane anti-fouling performance was improved instead of worsened.The entrapped membrane exhibited better anti-fouling performance than the deposited membrane and the neat membrane.
其他文献
为了研究信息对称情形下质量控制策略对供需双方决策的影响,采用Nash博弈模型,分析了事前检查、事后反馈和综合策略下均衡解的单调性、整体费用极小值点的惟一性、集体理性均
分析与研究了兖矿集团南屯煤矿下组煤开采地质条件,细致地划分出下组煤可采煤层顶板岩性分区图,分析总结了下组煤顶、底板岩性特征以及对生产支护产生的影响.
以南京市为例.运用定性、定量及空间分析等多种方法对快速发展期大城市外围人口集聚的阶段划分、时空特征、迁居机理进行了较详细的实证分析及初步的理论总结.结果显示:1990
针对新汶矿区复杂的地震地质条件,通过分析以往地震勘探的经验教训,指出今后新汶矿区开展地震勘探应注意的问题及提高地震勘探精度的途径.
农业科技论文中不规范使用专业术语是普遍现象。根据编辑农业科技期刊工作实践,结合查阅中国期刊中文数据库实证资料,将农业科技论文中常见的误用专业术语归纳成植物别名类、
基于节能技术产业间溢出的考虑来解析中国的能源强度下降现象。在分析了不同的节能技术产业间溢出途径如何形成一种产业间节能技术的内在关联机制,以及它如何对产业的节能降
目的探讨超声定量组织多普勒速度成像技术(QTVI)评价正常人左、右心室间及左心室内各节段心肌同步性运动的价值.方法获取标准心尖位左室长轴观、两腔观和四腔观,应用QTVI获得
通过东庞矿2903工作面掘进巷道突水治理中的水文地质综合分析及综合技术措施的实施,为陷落柱快速治理提供了有利的依据及可靠的技术保证.
利用航海雷达在辽东湾冰区石油平台上,现场实时进行海冰观测;雷达监测海冰系统,针对海冰类型识别及对应冰厚度、流冰漂移速度、方向、冰边缘线等要素进行观测;应用统计模式分类法,对雷达观测的海冰数据进行分类、验证,其海冰分类识别结果标准率达80%以上,同时开展现场流冰跟踪数值预报业务,检验了现场雷达海冰监测、数值预报的可行性和应用性.
终极所有权结构如何影响公司的债务期限结构是公司治理研究中的一个重要问题。以2003年～2005年只发行A股的824家非金融上市公司的平衡面板数据为样本,通过随机效应模型实证检