共查询到20条相似文献,搜索用时 15 毫秒
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《环境科学文摘》2005,(4)
X591200502141纳滤膜分离技术处理放射性污染废水的试验研究/侯立安…(第二炮兵工程设计研究院)∥给水排水/中国建筑设计研究院.-2004,30(10).-47~49环图TU-2X591200502142自然条件下切尔诺贝利燃料颗粒在土壤中的分解动力学=Kinetics of dissolution of Chernobyl fuel parti-cles in soil in natural conditions[刊,英]/V.A.Kash-parov…∥J.Environ.Radioactivity.-2004,72(3).-335~353国图利用在切尔诺贝利核电站50km区域内于1995年至1997年间收集的土壤中90Sr物种形成的数据,研究了在自然环境条件下燃料颗粒分解的动力学。在大量… 相似文献
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Photochemically enhanced degradation of phenol using heterogeneous Fenton-type catalysts 总被引:8,自引:0,他引:8
The degradation of phenol was carriced out using heterogeneous Fenton-type catalysts in the presence of H2O2 and UV.Catalysts were prepared by exchanging and immobilizing Fe^2 in zeolite 13X,silica gel or Al2O3.The concentration of phenol solution was 100mg/L.The amount of H2O2 added was the stoichiometric amount of H2O2 required for the total oxidation of phenol.Under the irradiation of medium pressure light(300W)phenol was mineralized within 1 h in the presence of Fe^2 /zeolite 13X.The COD removal rate was enhanced in the presence of Fe^2 /zeolite 13X compared to that of Fe^2 /silica gel of Fe^2 /Al2O3.Analogous homogenous photo-Fenton reaction with equivalent Fe^2 was also carried out to evaluate the catalysis efficiency of Fe^2 /zeolite 13X.Results showed that the COD removal rate was near to that of homogeneous Fenton,while heterogeneous Fe^2 /zeolite 13X catalyst coule be recycled. 相似文献
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《环境科学文摘》1999,(6)
X830.2 9903633用于测定污泥和沉积物中有机氯化合物的兼有GC一MS的自动超临界流体萃取法一AutomatedSFE eombined with GC一MS for the determinationofo塔anoehlorine eompounds in sludge and sedi-ment仁刊,英〕/R.J.Trigg…// Intern.J.Environ.Anal.Chem.一1998,70(1/4)一47一58 环信6159X831 X33 9903634巴西里约热内卢室内外空气污染物的分布:海边办公室内空气质量的推断=压stribotion of indoorand outdoor air Pollutants in Rio de Janeiro,Brazil:implieotions to indoor air quality in bayside offiees[刊,英〕/L… 相似文献
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《环境科学学报(英文版)》2017,29(12):163-165
<正>In celebration of the 30th anniversary of Journal of Environmental Sciences(JES),a special JES symposium was held at the 9th National Conference son Environmental Chemistry(NCEC),in Hangzhou,China,on October 19-22,2017.More than 6100registrants participated in the conference.Co-organized by Professor X.Chris Le of the University of Alberta,Canada,Professor Guibin Jiang(Liu et al.,2016b)of the Research Center 相似文献
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《环境科学文摘》2005,(4)
X83200502436运用种的形成和同位素稀释技术来研究环境中砷的迁移=Coupling speciation andisotope dilutiontech-niques to study arsenic mobilization in the environment[刊,英]/Rebecca E.Hamon…∥Environ.Sci.&Technol..-2004,38(6).-1794~1798国图X83200502437关于使用典型表面进行干沉积机理的研究-Ⅱ.对气体状和粒状物质在酸性和碱性水面、水面、干面上的沉积过程进行分级=代理表面を用いた乾性沈着机构の研究-Ⅱ.酸性およびアルカリ性水面,水面,乾き面によるガス状および粒子物质の沈着过程の分画[刊,日]/下原孝章…∥大气环… 相似文献
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《环境科学文摘》2002,(4)
X51 2()0202088西安市燃煤中铅的排放量及其环境效应/雏昆利(中科院地理科学与资源研究所)…//环境科学/中科院生态环境研究中心一2(X)2,23(1)一123-125环图X一5XslZ(X犯仪犯89美国切萨皮克湾大气中的多抓联苯和颗粒有机及元素碳二Polychiorinatedbi帅enylsand拌Lrticulateor-ganlc/elementale公比n in the ati”OSphere of Chesa详akeBav,usA〔刊,英]/ P .A.B~iak…// Atmos.Envi-mn.一2(X)l,35(32)一5肠3一5677环图6161X512(X)双犯仪刃用一般环境浓度计算东京都内有害化学物质的总排放量=一般环境浓度奋用‘、九有害化学物质刃都… 相似文献
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Xiaofei Qin Xijuan Xi Zhongzhi Yang Shishuai Yan Yaxian Zhao Rongguo Wei Yan Li Mi Tian Xingru Zhao Zhanfen Qin Xiaobai Xu 《环境科学学报(英文版)》2010,22(5):744-751
Decabromodiphenyl ether (decaBDE), as a flame retardant, is widely produced and used. To study the thyroid disruption by technical
decaBDE at low concentrations, Xenopus laevis tadpoles were exposed to technical decaBDE mixture DE-83R (1–1000 ng/L) in
water from stage 46/47 (free swimming larvae, system of Nieuwkoop and Faber) to stage 62. DE-83R at concentration of 1000 ng/L
significantly delayed the time to metamorphosis (presented by forelimb emergence, FLE). Histological examination showed that DE-
83R at all tested concentrations caused histological alterations – multilayer follicular epithelial cell and markedly increased follicle size
accompanied by partial colloid depletion and increase in the peripheral colloid vacuolation, in thyroid glands. All tested concentrations
of DE-83R also induced a down-regulation of thyroid receptor mRNA expression. These results demonstrated that technical decaBDE
disrupted the thyroid system in X. laevis tadpoles. Analysis of polybrominated diphenyl ethers (PBDEs) (sum of 39 congeners) in X.
laevis indicated that mean concentrations of total PBDEs in X. laevis exposed to 1, 10, 100, 1000 ng/L were 11.0, 128.1, 412.1, 1400.2
ng/g wet weight, respectively. Considering that PBDEs burden of X. laevis tadpoles was close to PBDEs levels in amphibians as reported
in previous studies, our study has raised new concerns for thyroid disruption in amphibians of technical decaBDE at environmentally
relevant concentrations. 相似文献
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《环境科学文摘》2005,(4)
X142200501911在水圈和陆地上利用129Ⅰ/127Ⅰ做为生物地球化学过程和水动力过程的一个新的环境示踪物及地质年代计:有机碘的主要地位=129Ⅰ/127Ⅰas anewenvironmental tracer or geochronometer for biogeo-chemical or hydrodynamic processes in the hydrosphereand geosphere:the central role of organo-iodine[刊,英]/Peter H.Santschi…∥Sci.Total Environ..-2004,321(1/3).-257~271国图X144200501912菲对土壤酶活性的影响/宫璇(中科院沈阳应用生态研究所)…∥农业环境科学学报/中国农业生态环保协会.-2004,23(5).-981~984环图… 相似文献
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In order to study the differences in algae species and their biomass in water bodies in a region, three reservoirs and two lakes at the center of Guanzhong Plain were chosen to identify algae functional groups, measure biomass, and assess water quality, from January2013 to December 2014. The water bodies represented different trophic levels: one oligotrophic, three mesotrophic, and one eutrophic. Based on the Reynolds' functional groups, they had 10 groups in common—B, P, D, X1, M, MP, F, S1, J, and G, but the algae biomasses and proportions were different. In the oligotrophic reservoir, functional group B reached a peak biomass of 576 × 10~4 L~(-1), which accounted for 31.27%. In the eutrophic lake,functional group D reached a peak biomass of 3227 × 10~4 L~(-1), which accounted for only13.38%. When samples collected from other water bodies with similar trophic levels were compared, we found differences in the algae species functional groups. The potential reasons for the differences in algae functional group characteristics in the different water bodies in the region were water temperature and nutritional states. 相似文献