常规处理工艺对饮用水中有机物的去除

试验研究了常规处理工艺(混凝-沉淀-砂滤)对饮用水中有机物的去除,结果表明:常规处理工艺对CODMn去除效果较差,平均去除率为16.7%,且受到进水CODMn含量和水温的影响,水样CODMn含量高和水温高时,CODMn的去除率高;对NPOC的平均去除率为11.6%,效果较差;常规工艺对AOC几乎没有去除作用,多数情况下出厂水AOC浓度在氯的氧化作用下升高,平均增加55.3%;出厂水AOC平均为160.63μg/L,属于生物不稳定饮用水。     

生物过滤去除饮用水中有机污染物的试验研究

通过试验,探讨了生物过滤对饮用水源中微量有机物的去除效果与特性.结果表明,生物过滤可有效去除饮用水源中的微量有机污染物;滤料介质对生物过滤效果具有一定的影响,加氯水反冲洗对生物过滤具有明显的负面影响;活性炭、石英砂双层滤料生物滤柱可较大幅度地去除苯酸酯类、脂肪酸酯类和酚类等有机物.     

富营养化原水几种净水工艺处理效果的比较研究

对以某湖水为原水的几种净水工艺进行了对比试验研究，结果表明：与水厂现有工艺相比，生物陶粒预处理及预臭氧化＋生物陶粒预处理有较好的净水功效；预臭氧、生物陶粒、混凝沉淀、砂滤、活性炭等单元工艺有机地组合起来，对氨氮、叶绿素a、色度、浊度的去除率都比水厂工艺高，但出水氯化物Ames试验的致突变性增强，生物预处理对水中致突变前体物的去除能力有限，实践中净水工艺的组合应将健康风险与技术经济结合起来选择使用。     

CheckLight AOC快速测定仪检测水中AOC研究

考察了CheckLight AOC快速测定仪检测水中AOC的方法,针对该检测方法在使用中存在的问题进行了研究,探讨了该测定仪检测水中AOC指标的可行性.研究结果表明,采用AOC快速测定仪检测水中AOC,具有方法简便、时间短、工作量小的特点;但是纯水质量及检测时间对AOC测定值影响较大,建议各实验室采用统一标准的纯水,并提出90 min测定光强,以便最大限度缩短检测时间.     

The unique substrate specificity of human AOC2, a semicarbazide-sensitive amine oxidase

Semicarbazide-sensitive amine oxidases (SSAOs) catalyze oxidative deamination of primary amines, but the true physiological function of these enzymes is still poorly understood. Here, we have studied the functional and structural characteristics of a human cell-surface SSAO, AOC2, which is homologous to the better characterized family member, AOC3. The preferred in vitro substrates of AOC2 were found to be 2-phenylethylamine, tryptamine and p-tyramine instead of methylamine and benzylamine, the favored substrates of AOC3. Molecular modeling suggested structural differences between AOC2 and AOC3, which provide AOC2 with the capability to use the larger monoamines as substrates. Even though AOC2 mRNA was expressed in many tissues, the only tissues with detectable AOC2-like enzyme activity were found in the eye. Characterization of AOC2 will help in evaluating the contribution of this enzyme to the pathological processes attributed to the SSAO activity and in designing specific inhibitors for the individual members of the SSAO family. Electronic supplementary material  The online version of this article (doi:) contains supplementary material, which is available to authorized users.     

不同水处理工艺对可同化有机碳(AOC) 的去除特性研究

通过对不同水处理工艺出水中可同化有机碳(AOC)的测定,分析各处理工艺对AOC的去除特性,结果表明：常规工艺对AOC有一定的去除效果,生物活性滤池能有效去除AOC,并且生物预处理和深度处理都有助于去除AOC,须对不同原水中的有机物成分进行分析,以掌握各工艺对原水中有机物的去除规律。     

某市饮用水生物稳定性的研究及对策

对某市自来水进行了生物稳定性研究 ,结果表明 :传统处理工艺的出水中AOC浓度高达30 6 4μg/L ,已超过饮用水生物稳定性标准 (10 0 μg/L) ,试验工艺在混凝沉淀后增加生物处理单元 ,其出水中AOC浓度为 49μg/L ,确保了饮用水的生物稳定性     

Always-optimally-coordinated candidate selection algorithm for peer-to-peer files sharing system in mobile self-organized networks

In order to improve the performance of peer-to-peer files sharing system under mobile distributed en- vironments,a novel always-optimally-coordinated(AOC)criterion and corresponding candidate selection algorithm are proposed in this paper.Compared with the traditional min-hops criterion,the new approach introduces a fuzzy knowledge combination theory to investigate several important factors that influence files transfer success rate and efficiency .Whereas the min-hops based protocols only ask the nearest c...     

饮用水生物稳定性及影响因素

综述了饮用水生物稳定性的概念,并讨论了余氯量、有机营养物、水力条件、温度等因素对饮用水生物稳定性的影响.     

可同化有机碳测定方法探讨

研究了以３种不同接种方法测定水中可同化有机碳（ＡＯＣ）,结果显示,混合接种法所测结果较接近实际值,分别接种法结果明显高于实际值,依次接种法可能存在Ｐ１７（荧光假单胞菌,Ｐｓｅｕｄｏｍｏｎａｓ ｆｌｔｏｒｅｓｃｅｎｓ）溶解、释放细胞中有机物所至的ＡＯＣ偏高问题。依次接种法有时存在巴氏消毒不能完全杀灭Ｐ１７,从而干扰ＡＯＣ－ＮＯＸ的测定;混合接种法缩短了实验时间,简化了操作步骤,当１个平皿中Ｐ１７和Ｎ