中国SO_2排放对日本SO_2浓度及硫沉降的影响

利用相关文献及来自酸沉降网的中、日两国各观测站点的SO2监测资料,分析了近十年来中国SO2的污染现状、趋势及排放量对下风向日本各观测站点SO2浓度及硫沉降量的影响。结果表明,通过文献分析可知,2001—2009中国的SO2年均质量浓度分布在40~50μg/m3,总体呈下降趋势;中国部分城市的SO2年均浓度与中国SO2排放量的相关性总体高于日本各观测站点的SO2年均浓度与中国SO2排放量的相关性,中国的SO2排放对日本各观测站点的SO2年均浓度影响总体较小;情景模拟分析发现,中国SO2排放量对日本各观测站点SO2年均浓度的贡献率在7.5%~44.0%,平均贡献率为22.6%;中国SO2排放量对日本各观测站点硫沉降的贡献率在8%~41%,平均贡献率为22.1%。     

2,4-dichlorophenoxyacetic acid (2,4-D) micropollutant herbicide removing from water using granular and powdered activated carbons: a comparison applied for water treatment and health safety

Abstract

Activated carbons are well-known porous materials as an effective adsorbent used for the removal of emerging contaminants, such as herbicides, which are increasingly present in water bodies. Most water treatment plants, specially in Brazil, are unable to completely remove such contaminants by the conventional process and advanced treatment using activated carbons is required. The aim of this paper was to verify the influence of the activated carbons granulometry and specific surface area on the 2,4-dichlorophenoxyacetic acid (2,4-D) herbicide removal efficiency using distilled-deionized water and filtered water collected from a conventional Water Treatment Plant. Commercial activated carbons samples used in this work were obtained from two different manufacturers. Activated carbons were analyzed by the specific surface area, pore size and volume distribution, nuclear magnetic resonance, infrared and x-ray spectroscopy, moisture, volatile matter and ash contents. Batch adsorption isotherms experiments were used and performed by Langmuir and Freundlich models. Granular and powdered activated carbons removed over 99% of 2,4-D in distilled water and near to 99% using filtered water. The activated carbons evaluated in this work presented high performance and played a key role in water treatment by removing 2,4-D herbicide, ensuring the protection of human health and the ecosystem.     

油气长输管道安全评价方法--肯特法简介

为了客观地评价油气长输管线的安全性,采用肯特(KENT)危险指数评价法来确定管线不同分段的危险程度,定量计算其险指数,实例.     

Photooxidation of hydrochlorofluocarbons and hydrofluorocarbons initiated by OH radicals

ＰｈｏｔｏｏｘｉｄａｔｉｏｎｏｆｈｙｄｒｏｃｈｌｏｒｏｆｌｕｏｃａｒｂｏｎｓａｎｄｈｙｄｒｏｆｌｕｏｒｏｃａｒｂｏｎｓｉｎｉｔｉａｔｅｄｂｙＯＨｒａｄｉｃａｌｓ￥ＺｈｏｎｇＪｉｎｘｉａｎ；ＭｕＹｕｊｉｎｇ；ＹａｎｇＷｅｎｘｉａｎｇ（ＲｅｓｅａｒｃｈＣ...     

输油管线反打孔盗油抢修施工中的HSE管理初探

笔者就长输原油管道反打孔盗油抢修施工中如何进行HSE管理提出自己的看法，建议从5个方面重点考虑，并对此5个方面中应当注意的事项一一说明。     

光致发光材料的安全问题探讨

本文对光致发光材料的安全问题进行了初步探讨，硫化物型的发光材料性能不稳定，在生产和使用中应注意安全的防护，新型稀土发光的材料性能稳定，余辉时间长，亮度高，对人安全无毒。     

Thermal and spectroscopic studies on sorption of nickel(II) ion on protonated baker's yeast

Protonated form (Hy) of yeast was subjected to thermal analysis (TGA and DTG) in the temperature range 60–800 °C. Chemically bound water volatilizes around 200 °C and the matrix undergoes extensive oxidative decomposition at 450 °C, the weight loss reaching 75% at 800 °C. The sorption capacity of the matrix for nickel(II) ion increases on heat treatment from 60 to 200 °C (from 16.9 to 25.0 mg/g), but was reduced on heating to higher temperatures at an initial nickel(II) ion concentration of 1200 mg/g. The FTIR spectra of Hy and nickel(II) ion saturated yeast, indicated that biosorption occurs on the sugar and nucleic acid regions, possibly involving –COOH and –NH groups.     

Renewable resources in an endogenously growing economy: balanced growth and transitional dynamics

We introduce a renewable resource sector into an endogenous growth model of a small economy, deriving the transitional dynamic equilibrium. The model generates a long-run equilibrium in which a resource sector of limited size can coexist with constant ongoing growth elsewhere. The key feature of the model is the allocation of labor between harvesting the resource and its use in the final output sector. This naturally generates the empirically observed negative relationship between resource abundance and growth. We examine both the dynamic and long-run responses of the economy to various shocks pertaining to technological production conditions and resource sector parameters.     

雪峰山东段-连云山杂岩区域变质特征及岩石圈深部作用信息

通过对新近发现的连云山杂岩空间分布特征、岩相学、变质作用期次等的深入研究，表明它们经历了五期变质作用，即吕梁运动导致初始的埋藏变质作用以及随后深埋到33km深度的近高压绿片岩相变质作用和角闪岩相作用。此后因基性岩浆多次底侵和基底活化，连云山杂岩在晋宁期和燕山期遭受过多期次的局部高角闪岩相的变质作用，最后随湘东北盆－岭构造的形成和发展而进入退变质阶段，整个过程为近顺时针方向演化的P－T轨迹。其P－Ttd轨迹揭示了湘东北地区壳幔间相互作用过程和热历史演变。