In order to investigate the levels and patterns of PNP in Taihu Lake and its tributaries, 27samples were collected from this region and the concentrations of PNP in surface water, suspended particulate matter (SPM) and sediment were determined using high performance liquid chromatography mass spectrometry (HPLC-MS/MS). PNP concentrations in the surface water, SPM and sediment were 12.11~170.20ng/L, 115.74~3756.87ng/g and ND~2.65ng/g, dry weight, respectively. PNP was mainly distributed in surface water in tributaries, while distributed in SPM in sampling site of S16~S21. The total organic carbon (TOC) was also analyzed in this study, and the result indicated that there was obvious positive correlation between the levels of PNP and TOC. In addition, based on the PNP concentration levels, the ecological risks of PNP contamination in Taihu Lake and its tributaries were evaluated by the quotient method. The levels of PNP were considerably low and this compound may have low risk to benthic organisms.

The concentration and distribution of bisphenol A, tetrabromobisphenol A and three kinds of alkylphenols in surface water and sediments from Taihu Lake and its tributaries were investigated by solid phase extraction and high liquid chromatography-electrospray tandem mass spectrometry (SPE-HPLC-MS/MS). The results showed that NP and BPA were the main Contaminants with an average content of 29.6ng/L (0~121ng/L) and 17.5ng/L (0~55.1ng/L) in surface water, respectively. The average concentration of NP in sediment was 240ng/g (0~2045ng/g), followed by TBBPA, with an average of 81.0ng/g (0~901ng/g). The correlation analysis showed that the total of the targets was positively correlated with the TOC in sediments. Overall, the pollution of its tributary and North Taihu Lake were more serious. In addition, the ecological risk assessment results showed that the entropy risk entropy of the targets in Taihu Lake and its tributaries was relatively high, and its ecological risk can’t be ignored. However, the risk assessment for human health showed that the EEQt <1ng E2/L, which does not have a significant risk.

模拟水生态系统构建了室内微宇宙系统,包括水相、沉积物、苦草和斑马鱼,并利用高效液相色谱-串联质谱法研究了典型烷基酚类化合物辛基酚(OP)在其中的动态变化过程.结果表明,在模拟水生态系统中加入200 μg/L的OP后,在各相中的暴露浓度随时间的变化而变化,试验结束时(23 d)水相、沉积物、苦草和斑马鱼中的平均浓度分别为7.98 μg/L、16.7 ng/g、10.9 μg/g和0.67 μg/g;不同环境介质对OP的富集存在较大差异,其富集能力为苦草＞斑马鱼＞沉积物.

Based on an acute toxicity test on fish, an experiment was conducted on toxicity of tetrabromobisphenol A (TBBPA) and its degradation product of 2,4,6?tribromophenol (TBP) to growing young Pelteobagrus fulvidraco, especial?ly their endocrine?disrupting effects. During the experiment, growth rate of the juveniles was measured and the minimum observable response concentration ( MORC) and unobservable response concentration ( URC) of TBBPA and TBP in the juveniles exposed to the chemicals for 28 days. Contents of vitellogenin ( VTG) and adrenocorticotropic hormone ( ACTH) content in viscera of the fish were also measured using the enzyme?linked immunosorbent assay ( ELISA) kits for signifi?cant difference analysis. Results show that concentrations of TBBPA and TBP and growth rate of the fish in weight dis?played an obvious does?effect relationship with MORC and URC of TBBPA being 0?32 and 0?16 mg·L-1 and MORC and URC of TBP being 0?64 and 0?32 mg·L-1, respectively, which indicates that TBBPA was more toxic than TBP. With rising TBBPA concentration, VTG and ACTH in the fish significantly increased in content, but VTG did not show any sig?nificant response to change in concentration of TBP and ACTH declined by a large margin in content when TBP reached 0?64 mg·L-1 in concentration. It is, therefore, presumed that TBBPA and TBP are potential environmental endocrine dis?ruptors.

运用多介质逸度模型对PCB52在南京地区空气、水体、土壤和沉积物中的浓度分布与多介质间的迁移、归趋行为进行模拟研究并分析PCB52在研究区域环境多介质间的迁移通量,确定其在环境中的主要迁移过程;结合文献中的监测数据,对模型的可靠性进行验证;对模型的输入参数进行灵敏度分析;通过模拟浓度与实际浓度的对比,表明模型在该地区具有很好的适用性.结果表明,环境系统达到平衡时,PCB52在沉积物中的含量占其在环境系统总含量的96.12％;PCB52从环境系统中的消失途径主要为空气平流输出和空气降解;环境温度和空气平流输入是影响化合物在环境相中浓度分布的最主要因素.此外,PCB52初步的生态风险评价表明其对生态环境未构成严重威胁,但潜在危害仍不容忽视.

Chemicals are attracting increased public concern and scientific interest due to their potential for impacting ecosystem and human health. The dose-respones relationship will directly affect the ecological effect of most chemicals in the environment, and multi-media models can predict the expose levels of chemicals and provide theoretical support for preventing and controlling ecological risks of chemicals. This paper has investigated in detail the application of some model softwares based on the theory of fugacity in recent years, analyzed and summarized the function, characteristics and application areas of frequently-used fugacity model softwares. The prospects of models have also been discussed in order to provide a technical support for environmental risks assessment and management.

A novel copper (Ⅱ) complex [Cu(PyPt)(NO3)2] (where HPyPt=N-2-Pyridyl-N'-Phenyithiourea ligand) had been prepared and structurally characterized, its DNA binding activity had also been investigated. The complex crystallizes in the triclinic system, space group P1 with cell parameters a=0.76152(15) nm, 5=0.809 57(16) nm, c=1.3113(3) nm, a=76.01(3)°,β=89.59(3)°, γ=68.24(3)°, V=0.725 5(2) nm^3 and Z=2. The interactions between the complex and calf thymus DNA had been investigated using fluorescent spectra, UV spectra and viscosity. The intrinsic binding constant (K1,) for complex to DNA was calculated to be 1.63×10^3 L•mol^(-1) CCDC: 703825.

Nanosized zeolite T with the mean size range of 80～150 nm was synthesized by conventional heating or microwave heating at 85 ℃ with the addition of 10% template.The synthesized samples were characterized by XRD,IR,SEM and N2 adsorption-desorption.The results showed that nanosized zeolite T had uniform particle size distribution and large surface area,and the very small amount of nanosized seed crystals was effective to promote the crystallization of zeolite T.The high crystal seed effect of nanosized crystals was considered from large crystal surface area supplied to the formation of new nuclei and high growth rate of seed fragments.Furthermore,the influence of synthesis conditions such as crystal seeds,template,reaction temperature and heating methods on particle size distribution(PSD) was investigated.

Zeoilte T crystals were synthesized by microwave heating and could be crystallized well within 8 h when the template was added in the gel. Compared with the conventional heating method, not only was crystallization time reduced over 80%, but also the crystallinity and surface area of crystals were improved. Similar phenomenon occurred in the presence of seeds. In addition to shorter synthesis time, the smaller crystals with narrower particle size distribution were obtained by the title method. These could be attributed to high heating rate, fast dissolution of gel and homogeneous heating of microwave irradiation.

In January of 1977, Jimmy Carter brought forward and pushed human rights foreign policy. He was the first American president who pushed the systematic human rights foreign policy. From then on, human rights became the basic guide line of American foreign policy. Before long, he made use of this foreign policy in an actual diplomatic issue. On September 7 th of this year, American government and Panama subscribed the new Panama Canal Treatiesafter a long time of negotiating. By analyzing the background and process of the subscription of these treaties as well as how they were passed in Congress, we can learn that the essence of so-called human rights foreign policy is latent hegemonism and power politics under the special historical condition.