苔藓Lophozia ventricosa挥发油化学成分研究

采用水蒸气蒸馏法提取苔藓Lophozia ventricosa挥发油，用毛细管色谱法对挥发油进行了分析，采用归-化法确定各组分的相对含量，并用GC—MS联用技术对分离的化学成分进行鉴定．经计算机检索并结合文献调研，共鉴定出28个化合物，占挥发油总量的93．3％，其中含1个单萜、23个倍半萜（15个为含氧倍半萜）和1个二萜，主要成分为Maalioxide（45．6％）和Eudesma-4．（15），7（11）-dien-8-one（28．9％）．图2表1参12     

磁性多孔陶粒生物膜反应器处理垃圾渗滤液的试验研究

对多孔陶瓷进行磁化改性获得磁性多孔陶瓷载体,并将该载体应用于垃圾渗滤液的处理试验.对比试验结果表明:在反应器的曝气量为3 L/h,曝气时间为16 h/d,温度为20～30℃时,垃圾渗滤液经磁性载体生物膜反应器30d处理后,上清液中COD、NH3-N的去除率均在90％以上,出水浓度达到国家生活垃圾填埋场污染控制标准(GB16889-2008)的指标要求.     

杀虫双生产废水的预处理研究

研究杀虫双生产废水的预处理工艺，对碱性废水采用减压蒸馏法脱盐，馏出比1／3，真空度40kPa,10次循环蒸馏，脱盐率达77％，馏出液的可生化性好，可直接生物处理，酸性废水，尾气吸收废水经混合调碱处理后，CODcr去除率达75％，BODs/CODcr由原水的0．08提高至0．36，各股废水预处理后混合，经7d间歇生化处理的CODcr去除率达68％。     

Performance and microbial diversity of an expanded granular sludge bed reactor for high sulfate and nitrate waste brine treatment

The disposal of waste brines has become a major challenge that hinders the wide application of ion- exchange resins in the water industry in recent decades. In this study, high sulfate removal efficiency （80%-90%） was achieved at the influent sulfate concentration of 3600 mg/L and 3% NaC1 after 145 days in an expanded granular sludge bed （EGSB） reactor. Furthermore, the feasibility of treating synthetic waste brine containing high levels of sulfate and nitrate was investigated in a single EGSB reactor during an operation period of 261 days. The highest nitrate and sulfate loading rate reached 6.38 and 5.78 kg/（m3-day） at SO42--S/NO3-N mass ratio of 4/3, and the corresponding removal efficiency was 99.97% and 82.26% at 3% NaC1, respectively. Meanwhile, 454-pyrosequencing technology was used to analyze the bacterial diversity of the sludge on the 240th day for stable operation of phase X. Results showed that a total of 9194 sequences were obtained, which could be affiliated to 14 phyla, including Proteobacteria, Firmicutes, Chlorobi, Bacteroidetes, Synergistetes and so on. Proteobacteria （77.66%） was the dominant microbial population, followed by Firmicutes （12.23%） and Chlorobi （2.71%）.     

日用陶瓷实施清洁生产技术的评价

清洁生产是一个系统工程 ,是对生产全过程以及产品的整个生命周期采取污染预防的综合措施。采用LCA的方法对日用陶瓷生产过程进行全面分析与评价 ,并提出了实施清洁生产的途径。     

Possible linkages between lignite aquifers, pathogenic microbes, and renal pelvic cancer in northwestern Louisiana, USA

In May and September, 2002, 14 private residential drinking water wells, one dewatering well at a lignite mine, eight surface water sites, and lignite from an active coal mine were sampled in five Parishes of northwestern Louisiana, USA. Using a geographic information system (GIS), wells were selected that were likely to draw water that had been in contact with lignite; control wells were located in areas devoid of lignite deposits. Well water samples were analyzed for pH, conductivity, organic compounds, and nutrient and anion concentrations. All samples were further tested for presence of fungi (cultures maintained for up to 28 days and colonies counted and identified microscopically) and for metal and trace element concentration by inductively-coupled plasma mass spectrometry and atomic emission spectrometry. Surface water samples were tested for dissolved oxygen and presence of pathogenic leptospiral bacteria. The Spearman correlation method was used to assess the association between the endpoints for these field/laboratory analyses and incidence of cancer of the renal pelvis (RPC) based on data obtained from the Louisiana Tumor Registry for the five Parishes included in the study. Significant associations were revealed between the cancer rate and the presence in drinking water of organic compounds, the fungi Zygomycetes, the nutrients PO₄ and NH₃, and 13 chemical elements. Presence of human pathogenic leptospires was detected in four out of eight (50%) of the surface water sites sampled. The present study of a stable rural population examined possible linkages between aquifers containing chemically reactive lignite deposits, hydrologic conditions favorable to the␣leaching and transport of toxic organic compounds from the lignite into the groundwater, possible microbial contamination, and RPC risk.     

Association between short-term exposure to ambient air pollution and hospital admissions for transient ischemic attacks in Beijing,China

Environmental Science and Pollution Research - Numerous studies have examined the associations between air pollution and stroke. However, little is known about the associations between air...     

宁波盆地白垩系古地磁特征兼论馆头组朝川组和方岩组的层位归属

浙东宁波盆地白垩纪陆相火山岩系,经古地磁研究表明,以往认为时代属于早白垩世早期的馆头组,晚期朝川组和晚白垩世早期的方岩组均呈正向磁化,平均磁化方向基本一致。据绝对年龄和古生物旁证,磁化时间属白垩纪中期正向极性超时。因此,馆头组的层位应作相应的提高,从白垩系下部上升到白垩系中部;朝川组随之位于其上。方岩组纳入白垩系中部,在馆头组之下还应有一套以正负极性交迭为特征的白垩纪早期沉积物。从而对以往所谓的上侏罗统磨石山群的时代提出疑问。从古地磁方向特征的规律,支持了白垩系三分说。