Effects of mercury contaminated rice from typical chemical plant area in China on nitric oxide changes and c-fos expression of rats brain

IntroductionMercury(Hg) ,asoneoftheprioritypollutantandhottopicinthefrontofenvironmentalresearchinmanycountries ,hasbeenpaidhigherattentionintheworldsincethemiddleoflastcentury .Chinaisthethirdlargestmercuryproducer,GuizhouProvince(2 4°3 0′— 2 9°13′N     

陈垃圾特性分析及其适用性评价

对深圳市盐田区垃圾场处置工程陈垃圾特性进行了分析，结果表明，场内陈垃圾已基本腐熟，相对附近农田土壤，陈垃圾中的营养物质较高，接近但尚未完全达到农用垃圾肥标准，且铅含量超标２～３ 倍，不宜进入食物链。但陈垃圾可用作市区绿化地带、公园、苗圃、林业等处的有机肥和垃圾填埋场封场工程的表层营养土     

Electrochemical reduction characteristics and mechanism of nitrobenzene compounds in the catalyzed Fe-Cu process

The reduction of the nitrobenzene compounds （NBCs） by the catalyzed Fe-Cu process and the relationship between the electrochemical reduction characteristics of NBCs at copper electrode and reduction rate were studied in alkaline medium（pH=11）. The catalyzed Fe-Cu process was found more effective on degradation of NBCs compared to Master Builder＇s iron. The reduction rate by the catalyzed Fe-Cu process decreased in the following order： nitrobenzene 〉4-chloro-nitrobenzene ≥m-dinitrobenzene ：〉 4-nitrophenol ≥2,4-dinitrotoluene 〉2-nitrophenol. The reduction rate by Master Builder＇s iron decreased in the following order： m-dinitrobenzene ≥4-chloro-nitrobenzene 〉4-nitrophenol 〉2,4-dinitrotoluene ≈nitrobenzene 〉2-nitrophenol. NBCs were reduced directly on the surface of copper rather than by the hydrogen produced at cathode in the catalyzed Fe-Cu process. The reduction was realized by the hydrogen produced at cathode and Fe（OH）2 in Master Builder＇s iron, It is an essential difference in reaction mechanisms between these two technologies. For this reason, the reduction by the catalyzed Fe-Cu depended greatly on NBC＇s electron withdrawing ability.     

用镍矿渣生产建筑砌块研究

以碱激发磨细镍矿渣作为胶结材料，用破碎后的镍矿渣作为集料，研究了镍矿渣含量为９４％，抗压强度达２８９ＭＰａ的镍矿渣建筑砌块。该种建筑砌块的研制成功，为镍矿渣的处理，开辟了一条途径。     

Managing international collaboration for the development and application of environmental technologies: opportunities for China & other Asia Pacific countries

Increased international cooperation in the field of contaminated site management has resulted in the formation of numerous networks and fora. The key benefits of increased co-operation are perceived to be in the reduction of duplication in efforts, particularly related to industry, in the co-ordination of contaminated site research, policy development and information dissemination. The paper introduces and briefly discusses key networks and collaborative projects currently in operation throughout the world relating to contaminated site management. The experience shared within these groups should prove useful to the application of such environmental problems in China and the Asia-Pacific region.     

镁渣配料煅烧硅酸盐水泥熟料的研究

研究了镁渣矿物组成和镁渣配料煅烧硅酸盐水泥熟料的反应动力在数和物理性能。结果表明：镁渣的主要矿物组成为γ－Ｃ２Ｓ、β－Ｃ２Ｓ、ＭｇＯ、ＣＦ、Ｃ２Ｆ、ＦｅＯ、ＣａＦ２等，并且镁渣可降低熟料形成反应表观活化能，加速熟料矿物的形成，提高熟料的强度。     

利用含铅粉尘制铬黄颜料的研究

针对显像管玻壳粉尘的特点，提出了采用盐酸热循环浸取铅，冷析氯化铅产品，实现铅尘无害化的方法；并解决了由氯化铅生产铬黄颜料的技术关键。采用该技术处理此类粉尘不但具有良好的环境效益，而且经济效益显著。     

鞍山市电厂燃煤锅炉灰渣的资源化利用途径

在简要介绍机电厂产生灰渣的机理、旋风锅炉除尘固硫工艺流程以及国内锅炉灰渣的利用现状的基础上，以鞍山热电新材股份有限公司灰渣利用现状为例介绍河分析了燃煤锅炉灰渣的资源化利用情况。按该厂炉渣产生量3．5t/a估算循环利用年均获利可达62．5万元，其经济效益显著。     

Influence of form and quantity of chromium on the development and survival of two silkworm (Bombyx mori L.) races

IntroductionThediversityamonginsectlifehistoriesmakesitdifficulttocomparetheeffectofachemical(orfactor)onthedevelopmentoftheseorganisms.Thediversityofbioassaysrangesfromthepopulationleveltothemolecularlevelandfrominvivotoinvitrostudies(Zhang ,1 993 ) .Differentparametershavebeenusedtostudyinsectgrowthinhibitionofmanychemicals.Forexample ,LD50 (thedosewhichcauses50 %mortalityinapopulation)iscommonlyusedtodeterminetheactivityofchemicalsthathaveacutetoxicity .Itcannotbeusedtothosechemicalsthatd…     

物元分析法在大气监测优化布点中的应用

探讨了物元分析法在大气监测优化布点中的应用，获得了符合实际情况的优选闰，证明该法简便实用。为学趺同监测部门科学合理地设置大气监测点位提供了有益的参考。