2013年11月23日山东莱州4.6级地震序列初步分析

2013年11月23日山东省莱州市发生Ms4.6级地震,该地震发生在沂沭断裂带东侧.该地震序列类型为主余型,但是地震序列的h值小于1.根据地震的等震线长轴、震源机制解和地质资料分析认为发震断层呈NE向.该地震打破了华北地区6个月的ML4级地震平静,可能预示着华北地区中强地震活动复苏,拉开华北地区中强地震活动序幕,对华北地区6级地震具有指示意义.此外,该地震是1995年苍山Ms5.2级地震后,山东内陆地区发生的最大地震,引起了广泛的政府和社会关注,具有重要的社会影响.     

关于加强企业职业卫生与健康教育工作的实践和思考

通过对职业卫生与健康教育多方面的论述,指出：职业卫生与健康教育是企业科学管理体系的重要组成部分;强化职业卫生意识宣教,加强职业健康教育组织与管理,是控制或消除职业危害因素,保障职工身心健康,促进企业健康发展的重要动力因素。提出了企业加强职业卫生与健康教育工作的对策和途径。     

微波预处理和微生物联合煤炭脱硫技术初探

将微波技术应用于微生物法煤炭脱硫,研究了煤粉粒径、煤浆浓度、初始pH值、嗜酸氧化亚铁硫杆菌(Acidithiobacillus ferrooxidans)接种量、微波辐照时间、脱硫周期等因素对微波预处理和微生物联合脱硫效果的影响,同时以单纯Acidithiobacillus ferrooxidans煤炭脱硫作对照.在煤样粒径为200目(＜0.074 mm)、煤浆浓度为10%、初始pH为2.5、菌体接种量为10%、微波辐照时间3 min、脱硫周期4 d、温度30℃、摇床转速为160 r/min条件下,微波预处理和微生物联合作用对煤炭中全硫的脱除率可达51.3%.该结果表明,微波预处理和微生物联合煤炭脱硫技术可以大大缩短微生物脱硫周期.该研究结果可为开发新脱硫工艺提供参考.     

Investigation on solar photocatalytic degradation of various dyes in the presence of Er3+:YAlO3/ZnO–TiO2 composite

In this work, Er³⁺:YAlO₃/ZnO–TiO₂ and ZnO–TiO₂ composites were prepared by the ultrasonic dispersion and liquid boiling method. In succession, they were then characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Acid red B as a model dye compound was degraded under solar light irradiation to evaluate the photocatalytic activities of the Er³⁺:YAlO₃/ZnO–TiO₂ and ZnO–TiO₂ composites. We found that the photocatalytic activity of ZnO–TiO₂ composite can be enhanced by adding an appropriate amount of Er³⁺:YAlO₃. We reviewed influencing factors, such as Er³⁺:YAlO₃ content, heat-treated temperature and heat-treated time on the photocatalytic activity of the Er³⁺:YAlO₃/ZnO–TiO₂ composites. In addition, the effects of solar light irradiation time, dye initial concentration, Er³⁺:YAlO₃/ZnO–TiO₂ amount and solution acidity on the photocatalytic degradation of acid red B dye in aqueous solution were investigated in detail. Simultaneously, the degradation and comparison of other dyes such as methyl orange (MO), rhodamine B (RM-B), azo fuchsine (AF), congo red (CG-R) and methyl blue (MB) were also reviewed. In addition, we attempted to explore both the principle of possible excitation of Er³⁺:YAlO₃/ZnO–TiO₂ under solar light irradiation and the mechanism of photocatalytic degradation.     

废铁屑生产聚合硫酸铁实验研究

文章介绍了聚合硫酸铁的制备，并用不同的原料合成了几种聚合硫酸铁产品，讨论了影响产品性能的因素。同时，将它们用于给水处理和污水处理，取得了较为理想的结果。     

动车组突发事故应急处置现状及对策研究

本文分析了我国铁路突发事件及应急管理的现状,以京哈上行线汽车侵限与D8次旅客列车碰撞事故应急处置为研究对象,研究了动车突发事故及应急处置特点,分析了目前动车组应急管理过程存在的问题,提出了加强预警机制、完善应急预案、增加应急培训演练等提高动车碰撞突发事故应急处置效率的措施。     

太湖地区不同土地利用影响下水稻土重金属有效性库变化

在太湖地区调查选择了乡镇工业环境、集约化农业丰产方及长期肥料试验地等几种人类农业利用类型和环境影响的地块,采集水稻土耕层样本作若干重金属的有效性库分析.结果表明,各种环境和利用影响下太湖地区水稻土重金属有效性库都存在升高的趋势,其程度介于30%至200%,且以表层最为突出.近工业区环境和长期单施化肥下这种有效性库变化最为剧烈,其土壤Cu、Pb有效性库分别达到7.96～2.15 mg·kg^-1、24.7～3.47mg·kg^-1和8.34～4.42 mg·kg、9.01～4.95 mg·kg^-1.这种有效性升高伴随着总量的积累趋势可能是太湖地区土壤环境质量演变的当前特点,这必须在本地区农业与食物安全中备加关注.     

深圳湾沉积物中重金属污染累积过程

通过测定深圳湾沉积物柱样中重金属的含量,分析重金属浓度的剖面分布情况,并结合²¹⁰Pb的测年资料,高分辨率地研究重金属的污染历史,并分析其污染的累积过程结果表明:深圳湾沉积物中重金属的浓度相对较低,但Pb、Cu、Zn等已明显受到人类污染源的影响;近20年深圳经济的快速发展,以及20世纪60～70年代香港经济的崛起时期,对深圳湾沉积物重金属污染累积有显著的贡献.     

晚中新世以来帕米尔高原生长过程及其与塔里木盆地气候变化可能的联系

帕米尔高原是我国极端干旱区——塔里木盆地的西部边界,也是青藏高原西部构造结所处的位置,所以,它的构造演化过程对于研究青藏高原生长过程及塔里木盆地的干旱化历史具有重要的意义。本文通过帕米尔高原东北部正断裂活动的空间展布、活动性质及运动时代的分析,结合最近构造观测结果,提出帕米尔高原在晚中新世已经隆升到了能够影响西风气流通过的高度。尽管高原在晚中新世已经存在东西向的拉张应力,木吉-塔什库尔干谷地可能最终形成于早-中更新世。这一事件奠定了作为喜马拉雅山到南天山之间过渡的帕米尔高原的现今地貌形态及塔里木盆地的气候特征背景。本文结合西昆仑北部及南天山的古地理演化及构造运动证据分析,提出帕米尔高原晚中新世以来的构造地貌演化可能是塔里木盆地晚中新世干旱化加剧的主要原因,中更新世气候代用指标解释复杂性可能也与此密切相关,全球变冷和特提斯海西退可能对晚中新世以来的气候变化也有一定的贡献。     

Monitoring atmospheric nitrous oxide background concentrations at Zhongshan Station, east Antarctica

At present,continuous observation data for atmospheric nitrous oxide(N_2O) concentrations are still lacking,especially in east Antarctica.In this paper,nitrous oxide background concentrations were measured at Zhongshan Station(69°22′25″S,76°22′14″E),east Antarctica during the period of 2008–2012,and their interannual and seasonal characteristics were analyzed and discussed.The mean N_2O concentration was 321.9 n L/L with the range of 320.5–324.8 n L/L during the five years,and it has been increasing at a rate of 0.29% year-1.Atmospheric N_2O concentrations showed a strong seasonal fluctuation during these five years.The concentrations appeared to follow a downtrend from spring to autumn,and then increased in winter.Generally the highest concentrations occurred in spring.This trend was very similar to that observed at other global observation sites.The overall N_2O concentration at the selected global sites showed an increasing annual trend,and the mean N_2O concentration in the Northern Hemisphere was slightly higher than that in the Southern Hemisphere.Our result could be representative of atmospheric N_2O background levels at the global scale.This study provided valuable data for atmospheric N_2O concentrations in east Antarctica,which is important to study on the relationships between N2 O emissions and climate change.