Pollution Characteristics and Ecological Risk of PBDEs in Water and Sediment from an Electronic Waste Dismantling Area in Taizhou

以台州某电子垃圾拆解工业园为圆心,在半径为16 km的范围内,由近及远设计了C(3 km)、S(5~10 km)和R(10~16km)三圈共30个采样点,研究了该区域水及沉积物中多溴联苯醚(PBDEs)的污染特征与生态风险.结果表明,水中PBDEs含量为9.4~57.2 ng·L~(-1),平均值为25.9 ng·L~(-1);沉积物中PBDEs含量为3.7~38 775 ng·g~(-1),平均值为2 779 ng·g~(-1);BDE-209均为主要成分.水及沉积物中PBDEs含量的空间分布态势均为:C圈>S圈>R圈,沉积物中PBDEs含量和离工业园区中心的距离呈极显著负相关(P S > R. Furthermore,the concentrations of PBDEs in sediments showed significant negative correlation against the distance from the industrial park( P < 0. 01). Compared with other regions around the world,the PBDEs contamination was more serious in the area,which indicated that e-waste dismantling activity was one of the significant sources for PBDEs pollution. It was estimated that a total of 30. 7 t PBDEs( including 28. 9 t BDE-209) was discharged into surrounding environment as a result of dismantling industrial activities in last 40 years. A preliminary ecological risk assessment for PBDEs in water and sediments was conducted by hazard quotient method. The results demonstrated that the Penta-BDEs in the center of e-waste dismantling area( a radius of 1. 5 km) was at particularly high risk level and could cause serious influence on the ecological safety and human health.环境保护公益性行业科研专项(201309047

Neurotoxic Effects of Co-exposure to Lead and Dechlorane Plus on Zebrafish (Danio rerio) Embryos

以斑马鱼(Danio rerio)为研究对象,探讨铅(Pb); 、得克隆(DP)及二者联合急性暴露对斑马鱼胚胎的神经毒性作用。结果表明,Pb(5、20 mug·L~(-1))和DP(15、60; mug·L~(-1))单独暴露均会引起斑马鱼自主运动频率增加,触摸反应能力和自由游泳活力下降,并且抑制初级运动神经元的生长,加剧尾部细胞凋亡。但; 与20 mug·L~(-1) Pb单独暴露相比,高剂量联合暴露(20 mug·L~(-1) Pb + 60 mug·L~(-1); DP)使斑马鱼的自主运动频率显著降低(P < 0.05),触摸反应能力和自由游泳活力显著增强(P <; 0.05),初级运动神经元轴突长度显著增加(P < 0.05),尾部细胞凋亡减少。与5 mug·L~(-1); Pb单独暴露相比,低剂量联合暴露(5 mug·L~(-1) Pb + 15 mug·L~(-1) DP)也显著减少斑马鱼尾部的细胞凋亡(P <; 0.05); 。上述结果表明,Pb或DP单独暴露对斑马鱼均可引起神经毒性作用;但二者联合暴露对斑马鱼自主运动、触摸反应以及自由游泳活力的影响则表现为拮抗作用。Neurotoxic effects of acute exposure to lead (Pb) or Dechlorane Plus; (DP),or both were investigated using zebrafish (Danio rerio) embryos.; Results showed that exposure to Pb (5,20 mug·L~(-1)) or DP (15,60 mug·; L-1) alone increased spontaneous movement,decreased touch response and; free-swimming activity,inhibited axonal growth of primary motoneuron and; induced cell apoptosis in zebrafish embryos. Co-exposure to 20; mug·L~(-1) Pb and 60 mug·L~(-1) DP significantly decreased spontaneous; movement (P < 0.05),enhanced touch response and free-swimming activity; (P < 0.05),increased axonal length of primary motoneuron (P < 0.05) and; reduced cell apoptosis in zebrafish when compared to 20 mug·L~(-1) Pb; exposure alone. Co-exposure to 5 mug·L~(-1) Pb and 15 mug·L~(-1) DP also; significantly decreased cell apoptosis on the tail region when compared; to 5 mug·L~(-1) Pb exposure alone (P < 0.05). These results demonstrated; that Pb or DP exposure alone could induce neurobehavioral toxicity in; zebrafish, but Pb and DP co-exposure had antagonistic effects on; spontaneous movements,touch response and free swimming activity.国家自然科学基金项目; 高等学校博士学科点专项科研基

[Bmim]FeCl_4中金纳米材料的合成及其催化性能

在1-丁基-3-甲基咪唑四氯化铁盐([Bmim]FeCl4)中用油胺还原AuCl3制备了2种金纳米材料,研究了产物的形貌特征,考察了所制纳米材料催化NaBH4还原对硝基苯酚制备对胺基苯酚的性能.结果表明,产物形貌主要由[Bmim]FeCl4/油胺摩尔比决定,比值从0.5增至2,金纳米材料从枝状结构转变成花状结构,长径比约为10的棒变为径向长度200nm的片层;枝状纳米颗粒比花状纳米颗粒的催化性能好

BmimFeCl_4中金纳米材料的合成及其催化性能

在1-丁基-3-甲基咪唑四氯化铁盐(BmimFeCl4)中用油胺还原AuCl3制备了2种金纳米材料,研究了产物的形貌特征,考察了所制纳米材料催化NaBH4还原对硝基苯酚制备对胺基苯酚的性能.结果表明,产物形貌主要由BmimFeCl4/油胺摩尔比决定,比值从0.5增至2,金纳米材料从枝状结构转变成花状结构,长径比约为10的棒变为径向长度200nm的片层;枝状纳米颗粒比花状纳米颗粒的催化性能好

BmimFeCl_4中金纳米材料的合成及其催化性能

在1-丁基-3-甲基咪唑四氯化铁盐(BmimFeCl4)中用油胺还原AuCl3制备了2种金纳米材料,研究了产物的形貌特征,考察了所制纳米材料催化NaBH4还原对硝基苯酚制备对胺基苯酚的性能.结果表明,产物形貌主要由BmimFeCl4/油胺摩尔比决定,比值从0.5增至2,金纳米材料从枝状结构转变成花状结构,长径比约为10的棒变为径向长度200nm的片层;枝状纳米颗粒比花状纳米颗粒的催化性能好

BmimFeCl_4中金纳米材料的合成及其催化性能

在1-丁基-3-甲基咪唑四氯化铁盐(BmimFeCl4)中用油胺还原AuCl3制备了2种金纳米材料,研究了产物的形貌特征,考察了所制纳米材料催化NaBH4还原对硝基苯酚制备对胺基苯酚的性能.结果表明,产物形貌主要由BmimFeCl4/油胺摩尔比决定,比值从0.5增至2,金纳米材料从枝状结构转变成花状结构,长径比约为10的棒变为径向长度200nm的片层;枝状纳米颗粒比花状纳米颗粒的催化性能好

Intramolecular Proton TransFer of SulFosalicylic Acid and the Determination of SulFosalicylic Acid in Acidic Tin Electroplating Solution by Rapid Fluorimetry

研究了弱碱性介质中，硝基安定经H2O2和紫外光共同作用后，反应产物的荧光特性（λEX＝355nM，λEM＝465nM），提出了一种测定硝基安定的新方法.标准曲线的浓度范围为0.25~3.00Mgl-1.方法的相对标准偏差和检测限分别为2.3%和0.13Mgl-1.可直接用于片剂中硝基安定含量的测定.Based on a great Fluorescence Stokes shiFt of sulFosalicylic acid, which has been observed in the experiment, a mechanism of intramolecular proton transFer of sulFosalicylic acid has been described.A rapid Fluorimetry For the determination of sulFosalicylic acid in acidic tin electrolating solution has been established.With this method, only 5 to 10 minutes were needed For one time of determination, and the determination was not interFered by the coexisting components in the electroplating solution.The relative standard deviation was less than 3%.福建省自然科学基

Ni_2P/SBA-15耦合BmimBF_4催化加氢脱氮的新过程

通过改性固体催化剂,耦合离子液体进行催化反应,实现了在温和条件下催化加氢脱氮性能的提高。采用助剂Mo对Ni2P/SBA-15催化剂进行改性,并用XRD、BET、XPS对催化剂结构进行表征。以吡啶为含氮模型化合物,将固体催化剂耦合BmimBF4在温和的条件下进行加氢脱氮活性评价。结果表明,低温时的脱氮过程主要以离子液体萃取为主;随着温度的升高,耦合加氢脱氮效果表现显著,且改性后的5%Mo-25%Ni2P/SBA-15催化剂耦合离子液体在150℃、3 MPa的条件下评价脱氮率最高,达到了80.1%。离子液体4次加氢循环之后,其加氢性能没有明显的下降。离子液体的参与使得催化加氢脱氮反应在温和的条件下得以实现,这为催化加氢在低温低压条件下提供了新的理论和工艺

环氧树脂氮化硼纳米复合材料及其制备方法

本发明公开了一种环氧树脂氮化硼纳米复合材料及其制备方法。所述制备方法包括：将氮化硼粉体或者六方氮化硼二维纳米片(简称氮化硼纳米片)与苯胺低聚物和-或其衍生物在溶剂中混合，获得氮化硼纳米片的分散液；将氮化硼纳米片的分散液与环氧树脂均匀混合形成混合物，之后脱除所述混合物中的溶剂，获得环氧树脂氮化硼复合物；以及，将环氧树脂氮化硼复合物与固化剂均匀混合。本发明利用苯胺低聚物及其衍生物与氮化硼的物理相互作用，无需苛刻化学反应等，仅仅通过物理搅拌或超声等方式，就可以剥离制得氮化硼纳米片，进而可采用所获氮化硼纳米片与环氧树脂等简单复合形成环氧树脂氮化硼纳米复合材料，其具有优异的力学和耐磨性能等