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室内环境污染研究进展 总被引:14,自引:1,他引:14
介绍了室内环境污染问题的由来及危害、研究对象及内容,并对国内外在室内环境这一新兴学科领域所开展的研究工作进行了综述,同时指出了我国进行室内环境 污染系统研究的必要性。 相似文献
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环境激素污染研究进展及污染防治 总被引:14,自引:0,他引:14
环境激素具有类雌激素活性,能对生物和人体的内分泌机能造成影响;环境激素污染可导致各种生物的生殖功能下降和生殖器免疫力降低,并引起各种生理异常。本文对国内外环境重金属激素和有机激素的研究进行了综述,并总结了防治环境激素污染的主要技术手段,指出环境激素致毒生物化学机理研究、环境激素在环境介质中的迁移-转化-积累的行为研究、环境激素容量分析以及环境激素物质的进一步筛选是国际环境科学领域的重要研究方向和前沿领域。 相似文献
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室内空气污染物的净化 总被引:17,自引:1,他引:17
本文通过对造成室内空气污染的原因和现有净化技术的比较分析,提出采用高效空气过滤技术和浸渍活性炭吸附技术相结合的空气净化方法,一是项经济,有效的方法。 相似文献
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环境激素具有类雌激素活性 ,能对生物和人体的内分泌机能造成影响 ;环境激素污染可导致各种生物的生殖功能下降和生殖器免疫力降低 ,并引起各种生理异常。本文对国内外环境重金属激素和有机激素的研究进行了综述 ,并总结了防治环境激素污染的主要技术手段 ;指出环境激素致毒生物化学机理研究、环境激素在环境介质中的迁移 转化 积累的行为研究、环境激素容量分析以及环境激素物质的进一步筛选是国际环境科学领域的重要研究方向和前沿领域。 相似文献
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B. Gassner A. Wüthrich J. Lis G. Scholtysik M. Solioz 《Journal of environmental science and health. Part. B》2013,48(5):729-739
Abstract Following the application of permethrin or cyhalothrin to cattle for the control of ectoparasites, the occurrence and persistence of these chemicals was assessed on the animals and in their environment. The release of permethrin from ear tags containing 1g of the drug on cattle was followed for 65 days and lead to concentrations of 5 to 35 μg of permethrin per gram of hair on the shoulders. On the flanks of the animals, the corresponding values were 10 times lower. Across the 1.5 acre pasture, high concentrations of permethiin were measured at various locations and long after treatment: 6 μg/g on bark of a birch after one week, 5 μg/g on a pole of the fence after two weeks, 1 μg/g in grass from a resting site of the animal after six weeks, and 0.5 μg/g in bark of a pine tree after three month and two weeks after the animals had left the pasture. In similar assays, cyhalothrin applied to milk cows as a pour‐on preparation was monitored. One week following treatment with 0.2 g/animal, hair cut from the shoulders contained 5 μg/g of the insecticide, which disappeared with a half‐life of 12 days. Dust collected two weeks after the pour‐on treatment from the milk barn where the cows were milked twice daily contained 47 μg/g of cyhalothrin, which disappeared with a half‐life of 44 days. These results show that synthetic pyrethroids used on farm animals can be the source of widespread and persistent contamination. 相似文献
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模拟室内环境下掺杂TiO_2纳米晶体的光催化性能 总被引:1,自引:0,他引:1
采用环境测试舱模拟可见光下的室内环境,以甲醛气体的光催化降解为探针反应,评价了通过溶胶-凝胶法分别制备的8种(银Ag、铜Cu、铁Fe、钨W、铈Ce、镧La、硫S和氯C l)掺杂TiO2纳米晶体的光催化活性及对甲醛气体的去除效果。用X射线衍射、激光粒度分析和紫外-可见分光光谱表征了掺杂钠米TiO2的微晶尺寸、晶体结构与光学性能。结果表明,Cu掺杂可以提高TiO2对氧的吸附能力,减少纳米粒子表面光生电子与光生空穴的复合,使TiO2的光吸收带边发生红移且有利于对可见光的吸收,从而使Cu掺杂TiO2在模拟室内环境下光催化甲醛气体的能力得到明显提高。 相似文献
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模拟室内环境下掺杂TiO2纳米晶体的光催化性能 总被引:8,自引:0,他引:8
采用环境测试舱模拟可见光下的室内环境,以甲醛气体的光催化降解为探针反应,评价了通过溶胶-凝胶法分别制备的8种(银Ag、铜Cu、铁Fe、钨W、铈Ce、镧La、硫S和氯C1)掺杂TiO2纳米晶体的光催化活性及对甲醛气体的去除效果.用X射线衍射、激光粒度分析和紫外-可见分光光谱表征了掺杂钠米TiO2的微晶尺寸、晶体结构与光学性能.结果表明,Cu掺杂可以提高TiO2对氧的吸附能力,减少纳米粒子表面光生电子与光生空穴的复合,使TiO2的光吸收带边发生红移且有利于对可见光的吸收,从而使Cu掺杂TiO2在模拟室内环境下光催化甲醛气体的能力得到明显提高. 相似文献
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Hsu-Wen Hung G. Daniel Sheng Tsair-Fuh Lin Yuhong Su Cary T. Chiou 《Environmental pollution (Barking, Essex : 1987)》2009,157(11):2928-2932
Concentrations of organic contaminants in common productive soils based on the total soil mass give a misleading account of actual contamination effects. This is attributed to the fact that productive soils are essentially water-saturated, with the result that the soil uptake of organic compounds occurs principally by partition into the soil organic matter (SOM). This report illustrates that the soil contamination intensity of a compound is governed by the concentration in the SOM (Com) rather than by the concentration in whole soil (Cs). Supporting data consist of the measured levels and toxicities of many pesticides in soils of widely differing SOM contents and the related levels in in-situ crops that defy explanation by the Cs values. This SOM-based index is timely needed for evaluating the contamination effects of food crops grown in different soils and for establishing a dependable priority ranking for intended remediation of numerous contamination sites. 相似文献
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鉴于跨国界河流的极端敏感性和新形势下日益突出的水环境风险问题,为确保跨国界河流的水环境安全,全力维护我国与邻国边境地区稳定,开展跨国界河流水环境风险防控及环境应急能力建设迫在眉睫。目前,跨国界河流流域水环境存在的主要问题和短板包括水环境风险底数不清、风险防控与应急体系尚未建立、监控预警及应急监测能力薄弱及应急物资保障体系薄弱等。针对上述问题,建议全面开展跨国界河流突发性环境风险评估,建立“一河一策一图”水环境风险防控工程体系,提升跨国界河流水环境风险防控与环境应急能力,并建立跨国界河流水环境应急物资储备管理体系。 相似文献