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排序方式: 共有127条查询结果,搜索用时 31 毫秒
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Severyn Salis Cecilia Testa Paola Roncada Sara Armorini Nicola Rubattu Angelo Ferrari 《Journal of environmental science and health. Part. B》2017,52(9):699-709
The occurrence of pesticides intended for non-agricultural use was investigated in 206 dust samples drawn from vacuum-cleaner bags from residential flats in Italy. The multi-residue analysis targeted on 95 different active principles was performed with UPLC-MS/MS, with a Limit of Quantification (LOQ) of 0.008 μg/g dry weight. The results indicated the presence of imidacloprid (IMI) and carbendazim (CARB) in 30% and 26% of the samples, with a mean and P95 concentration between 1.6 and 39 and between 0.08 and 4.9 μg/g, respectively. Combined presence of two biocides was noted in 19.4% samples, of three biocides in 9.2% samples, of four biocides in 3.4% samples, and of five and six biocides in 0.5% and 1% samples, respectively. According to the estimated dust intake in infants/toddlers aged 6–24 months (16–100 mg d?1) and cats (200 mg d?1), it was possible to obtain risk characterization with respect to the Acceptable Daily Intake (ADI) for IMI of 0.060 mg/kg body weight (bw) proposed by the European Food Safety Authority (EFSA) and the chronic Population Adjusted Dose (cPAD) of 0.019 mg/kg bw d?1 by US-EPA. Under the worst-case scenario, the presence of IMI in dust indicates potential exceedance of the cPAD in kittens, to be considered as sentinel also accounting for combined exposure. This study highlights the relevance of consumer empowerment about the responsible use of pesticides as biocidal products in indoor environment. 相似文献
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家蝇幼虫的综合开发利用 总被引:9,自引:0,他引:9
家蝇幼虫的利用前景十分广阔,本文主要介绍了家蝇幼虫在动物饲料、食用、几丁质、抗菌物质以及凝集素等方面的开发利用 相似文献
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黄土高原住区生活垃圾处理与资源化研究 总被引:4,自引:0,他引:4
以延安市为示范点对黄土高原住区生活垃圾的处理与资源化进行了研究。在对目前延安市生活垃圾特点和处理与资源化现状进行调查和分析的基础上 ,提出了以垃圾分类收集为关键 ,分别进行卫生填埋和焚烧的生活垃圾处理系统 ,并对卫生填埋和焚烧工艺的重要部分进行了设计 相似文献
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对一起网点房较大火灾调查的实际案例进行分析,说明了现场勘验工作对火灾认定的重要性。根据事故调查过程,分析了此类火灾的成因及预防措施,进城务工、经商人员安全防范意识薄弱,逃生自救知识缺乏是造成火灾严重后果的重要因素。并对调查工作中的经验进行总结和介绍。 相似文献
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V. Blazy A. de Guardia J.C Benoist M. Daumoin M. Lemasle D. Wolbert S. Barrington 《Waste management (New York, N.Y.)》2014,34(7):1125-1138
Compost sustainability requires a better control of its gaseous emissions responsible for several impacts including odours. Indeed, composting odours have stopped the operation of many platforms and prevented the installation of others. Accordingly, present technologies collecting and treating gases emitted from composting are not satisfactory and alternative solutions must be found. Thus, the aim of this paper was to study the influence of composting process conditions on gaseous emissions. Pig slaughterhouse sludge mixed with wood chips was composted under forced aeration in 300 L laboratory reactors. The process conditions studied were: aeration rate of 1.68, 4.03, 6.22, 9.80 and 13.44 L/h/kg of wet sludge; incorporation ratio of 0.55, 0.83 and 1.1 (kg of wet wood chips/kg of wet sludge), and; bulking agent particles size of <10, 10 < 20 and 20 < 30 mm. Out-going gases were sampled every 2 days and their composition was analysed using gas chromatography coupled with mass spectrometry (GC–MS). Fifty-nine compounds were identified and quantified. Dividing the cumulated mass production over 30 days of composting, by odour threshold, 9 compounds were identified as main potential odour contributors: hydrogen sulphide, trimethylamine, ammonia, 2-pentanone, 1-propanol-2-methyl, dimethyl sulphide, dimethyl disulphide, dimethyl trisulphide and acetophenone. Five gaseous compounds were correlated with both aeration rate and bulking agent to waste ratio: hydrogen sulphide, trimethylamine, ammonia, 2-pentanone and 1-propanol-2-methyl. However, dropping the aeration rate and increasing the bulking agent to waste ratio reduced gaseous odour emissions by a factor of 5–10, when the required threshold dilution factor ranged from 105 to 106, to avoid nuisance at peak emission rates. Process influence on emissions of dimethyl sulphide, dimethyl disulphide, dimethyl trisulphide were poorly correlated with both aeration rate and bulking agent to waste ratio as a reaction with hydrogen sulphide was suspected. Acetophenone emissions originated from the wood chips. Olfactory measurements need to be correlated to gaseous emissions for a more accurate odour emission evaluation. 相似文献
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