厦门饮用水有机污染物危害的研究

厦门饮用水有机污染物危害的研究厦门市卫生防疫站高振华，梁荣春国家海洋局第三研究所郑金树厦门大学抗癌研究中心于侣仙，廖绵初许多研究表明，城市饮用水中存在着致突变的有机物，它们来源于水源水的污染、饮水氯化消毒的副产物三卤甲烷（THM3）等。因此，近年来饮..

蚕豆根尖微核技术在饮用水致突变性研究中的应用

采用蚕豆根尖微核（Mn）监测技术，对饮用水有机污染物的诱变性进行了研究。结果表明：饮用水诱变性强度，枯水期＞平水期＞丰水期。采用混凝沉淀工艺，出厂水Mn比进厂水降低40.6%。用气浮法制水工艺的出厂水Mn在正常范围内

Two I-h-symmetry-breaking C-60 isomers stabilized by chlorination

通讯作者地址: Xie, SY (通讯作者), Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 2. Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 电子邮件地址: [email protected] abiding surprise in fullerene science is that I-h-symmetric buckminsterfullerene C-60 (ref. 1) (I-h-C-60 or C-#1,812(60), the nomenclature specified by symmetry or by Fowler's spiral algorithm(2)) remains the sole C-60 species experimentally available. Setting it apart from the other 1,811 topological isomers (isobuckminsterfullerenes) is its exclusive conformity with the isolated-pentagon rule(3), which states that stable fullerenes have isolated pentagons. Although gas-phase existence of isobuckminsterfullerenes has long been suspected(4-7), synthetic efforts have yet to yield successful results. Here, we report the realization of two isobuckminsterfullerenes by means of chlorination of the respective C-2v-and C-s-symmetric C-60 cages. These chlorinated species, (C60Cl8)-C-#1,809(1) and (C60Cl12)-C-#1,804(2), were isolated in experimentally useful yields. Structural characterization by crystallography unambiguously established the unique pentagon-pentagon ring fusions. These distinct structural features are directly responsible for the regioselectivity observed in subsequent substitution of chlorines, and also render these unprecedented derivatives of C60 isomers important for resolving the long-standing puzzle of fullerene formation by the Stone-Wales transformation scheme(8-11).NNSF of China,20525103 ,20531050 ,20721001 , 20571062 ,20425312 973 Program 2007CB81530

串联流化床反应器冷态实验研究

为了解决攀枝花高钙、镁钛精矿采用电炉冶炼之后所得的高钛渣的直接氯化问题,进行了快速流化床-湍流床-快速流化床三级串联组成的串联流化床反应器的冷态研究。测定了流化床颗粒的速度和浓度分布,研究了固相的停留时间和流动形态,对快速流化床的流化速度、湍流床的轴向浓度分布进行了考察,比较了湍流床和沸腾床对同样强度颗粒的碾碎率,结果证明了湍流床具有较高的抗粘结能力

纳米二氧化钛在膜反应器中循环光催化降解亚甲基蓝

以低压汞灯为光源,纳米二氧化钛为催化剂,对纳米二氧化钛在膜反应器中循环光催化降解亚甲基蓝进行了研究,探讨了催化剂加入量、进料速度对降解率和降解速率的影响。结果显示,当纳米二氧化钛加入量和亚甲基蓝进料速度一定时,在一定时间内亚甲基蓝的光催化降解可达到平衡,降解曲线出现拐点。随着催化剂加入量的增加或进料速度变慢,降解拐点前移,降解率提高。纳米TiO2加入量为2.0 g.L-1,进料速度为15 mL.h-1时,降解拐点时间为150 min,降解率高达到88%。对膜反应器截留效果及膜污染情况进行的分析表明,膜反应器对纳米TiO2有很好的截留作用,在连续补充料液的循环反应中,透过液中TiO2的浓度为2.836 mg.L-1时,TiO2损失率仅0.142%

纳米二氧化钛光催化降解亚甲基蓝的研究

<正>随着工业的快速发展,染料的品种日益增加, 同时染料废水的成分也越来越复杂。传统处理染料废水的方法有吸附、絮凝、沉淀、过滤、气提等, 这些方法只是将污染物分离或浓缩,或者只是将污染物从一相转移到另一相,通常会不可避免的带来大量的废料和二次污染;因此,如何有效的降解污染物越来越重要。近年来有关污染物治理研究已逐步转向化学氧化法中的高级氧化技术(advanced oxidation processes)。根据产生自由基的不同,

纳米二氧化钛在染料废水处理中的应用

<正>随着工业染料品种的日新月异,染料废水的成分越来越复杂,这对于国内外的环境工作者无疑是一个重大的挑战。采用常规的废水处理方法,如:絮凝法、活性污泥法、生物法、物理化学法等难以处理染料废水,有时甚至形成苯、苯胺等有害物质。因此,寻找一种安全、有效的废水处理方法已成为研究的热点。二氧化钛由于物化性质稳定、无毒,能将生物难降解的污染物分解为水、二氧化碳等小分子无机产物,矿化程度高,可在常温常压下进行催化反应且不产生二次污染等优点,广泛应用于染料废水的处理中

顺流串联流化床流动特性研究

针对攀枝花钛资源钙、镁含量高的特点,研究了快速流化床 湍流床 快速流化床三级串联组成的顺流串联流化床的流动特性。采用光导纤维测速仪和压力计,研究了固相的停留时间和流动形态。对快速流化床的流化速度、湍流床的轴向和径向浓度分布以及抗粘结能力进行了考察。用功率谱密度函数表征床层的活跃程度,定性地说明了湍流床抗粘结能力提高的幅度

The Clinical Application of HEV-87A Antigen EIA KIT

我国戊型肝炎全病毒抗原抗HEV·IgM酶联诊断盒的临床应用廖绵初，干侣仙，黄如统，李晓萸，李德荣（厦门大学抗癌研究中心）（军事医学科学院五所）赵炳华（浙江医科大学第一附属医院）从1989年正式确立戊型肝炎HEPATITISE以来，许多国家都研制其诊断...hepatitis patient's sera were detected by HEV-87A antigen (inactivated cultue virus)EIA KIT.82 of them were anti-HEV.IgM positive by Diagnostic Biotechnology (Pte)Ltd (DBL)EIA kit; 90 of them were anti--HEV IgM positive and 88 were anti-HEV IgG positive by HEV-87A EIA kit.5 negative sera detected by DBL kit were neutralized by HEV87A antigen.4 of 5 could be neutralized, 1 of the 5 sera could not be neutralized.The results show that our EIA kit is more sensitive and speciFic.Among early patients with hepatitis E, the determination of anti-HEV IgM is better than that of anti-HEV IgG and it was discovered that patients with hepatitis E are co-inFectous with hepatitis A,B,C,D virus some times