一维碳纳米管与金属氧化物材料研究

一维纳米结构是最吸引人的功能材料而被广泛关注.一维形态可以很容易地提高纳米结构的独特性能,使它们适合各种各样的应用程序,包括气体传感器、电致变色的设备、发光二极管、场发射器、超级电容器和纳米发电机.因此,目前已合成多种一维纳米结构形式的纳米棒、纳米线、纳米管、纳米带等.本文主要介绍了一维碳纳米管与金属氧化物的性质与研究现状,探讨两种材料的优缺点以期进行互补修饰合成新型复合材料.     

矿化垃圾生物反应床处理渗滤液技术

针对矿化垃圾筛分后<15mm组分性质进行研究,并以该组分为填料设计制造矿化垃圾生物反应床处理渗滤液,研究表明,矿化垃圾具有较大的吸附比表面积,较强的离子交换容量,较高的有机质含量,含有种类和数量可观的微生物种群可供生物降解作用,是很好的污水处理生物介质。工程应用表明:渗滤液经过三级矿化垃圾生物反应床串联处理后,CODCr和NH4+-N的总去除率达到90%和95%以上,可稳定达到国家二、三级渗滤液排放标准。     

现场安全监督是安全工作的核心

随着石油工业的发展和科学技术的进步,在油气开发和加工的生产中已形成了一套完善、先进的工艺技术,但在生产现场的安全管理方面仍存在着许多薄弱环节和诸多不安全因素.这些不安全因素将导致各类事故的发生,直接威胁着油田的安全生产.     

石化企业危险化学品重大危险源风险评估

阐述了定量风险评价的个人风险和社会风险指标,并从前期准备、资料数据搜集、危险辨识、失效频率分析、失效后果分析、风险计算和风险评估等环节对某石化企业液化气一级重大危险源进行了定量风险评估。评估结果显示该重大危险源的个人风险和社会风险值基本符合安监总局40号令的要求。     

Multilevel air quality evolution in Shenyang: Impact of elevated point emission reduction

Visibility observed at different altitudes is favorable to understand the causes of air pollution. We conducted 4-years of observations of visibility at 2.8 and 60 m and particulate matter(PM) concentrations from 2015 to 2018 in Shenyang, a provincial city in Northeast China. The results indicated that visibility increased with the increasing height in winter(especially at night), and decreased with height in summer(especially at the daytime). PM concentration exhibited opposite vertical variati...     

郑州大气氮氧化物污染与灰色分析

通过对郑州市大气中NOx的监测和分析，初步揭示了NOx变化的规律。同时，运用灰色关联度分析，定量地分析了影响郑州市NOx变化的因素。并建立了该市的NOx产生量的GM（1，1）预测模型。结果表明：（1）影响NOx污染的主要因子是家庭用气普及率；（2）NOx在大气中的浓度呈逐年下降的趋势，2002年预测值为0.043mg/m^3。     

云南剑川粗面斑岩-正长岩杂岩体的岩石学特征

分布在剑川县城西侧的一系列碱性浅成斑岩-深成岩体,不是彼此孤立而是一个具有成因联系的杂岩体.该杂岩体可分为四次岩浆侵入,其中第Ⅱ次剑川粗面斑岩并不是过去认为的粗面岩,而是一个超浅成侵入体,从中心到边部可分为两个岩相带,岩石以碱性系列为主,岩浆是深熔作用形成的.     

地下水中222Rn的液体闪烁测量法

本文介绍的测量地下水中~(222)Rn的液体闪烁法,具有简便、快速、灵敏、可靠等优点。该方法仅需水样10ml,制样时间不超过1min,探测限可达0.82Bq/L,能实现样品测量的自动化。它不需要特殊的测量装置,普通的商品液体闪烁计数器即可满足要求。是一种进行大规模地下水样中~(222)Rn浓度调查的,较为理想的方法。     

Comprehensive and high-resolution emission inventory of atmospheric pollutants for the northernmost cities agglomeration of Harbin-Changchun, China: Implications for local atmospheric environment management

Using a bottom-up estimation method, a comprehensive, high-resolution emission inventory of gaseous and particulate atmospheric pollutants for multiple anthropogenic sectors with typical local sources has been developed for the Harbin-Changchun city agglomeration (HCA). The annual emissions for CO, NOx, SO₂, NH₃, VOC_S, PM_2.5, PM₁₀, BC and OC during 2017 in the HCA were estimated to be 5.82 Tg, 0.70 Tg, 0.34 Tg, 0.75 Tg, 0.81Tg, 0.67 Tg, 1.59 Tg, 0.12 Tg and 0.26 Tg, respectively. For PM₁₀ and SO₂, the emissions from industry processes were the dominant contributors representing 54.7% and 49.5%, respectively, of the total emissions, while 95.3% and 44.5% of the total NH₃ and NOx emissions, respectively, were from or associated with agricultural activities and transportation. Spatiotemporal distributions showed that most emissions (except NH₃) occurred in November to March and were concentrated in the central cities of Changchun and Harbin and the surrounding cities. Open burning of straw made an important contribution to PM_2.5 in the central regions of the northeastern plain during autumn and spring, while domestic coal combustion for heating purposes was significant with respect to SO₂ and PM_2.5 emissions during autumn and winter. Furthermore, based on Principal Component Analysis and Multivariable Linear Regression model, air temperature, relative humidity, electricity and energy consumption, and the urban and rural population were optimized to be representative indicators for rapidly assessing the magnitude of regional atmospheric pollutants in the HCA. Such indicators and equations were demonstrated to be useful for local atmospheric environment management.     

日本“3·11”大地震对石化行业的启示

简要分析了日本“3·11”大地震后发生的2起炼油厂火灾事故,对日本在地震中的一些经验教训进行了总结,根据本次及近几年地震对石化企业的破坏情况,分析了地震中石化装置的薄弱环节,并提出对石化行业的启示。