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汽车行业零部件材料检测中,关于多溴联苯和多溴二苯醚检测标准引用最广的是欧盟IEC 62321-6:2015《电工产品中相关物质的测定-第6部分气相色谱/质谱联用测定多溴联苯和多溴二苯醚》和国标GB/T 30512-2014中的QC/T 944-2013《汽车材料中多溴联苯(PBBs)和多溴二苯醚(PBDEs)的检测方法》,而且国家强制标准GB 30512 也即将发布实施,因此,完善检测标准中关于定量分析的准确性非常值得探讨与研究,本次研究针对标准中未提到的同分异构体作为研究对象,从十种多溴二苯醚中选取其中典型的几种物质,对其多种同分异构体进行定量检测,研究得出同分异构体之间是否存在检测结果的差异,从而为更准确的检测多溴联苯与多溴二苯醚含量提供参考价值。 相似文献
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采用溴化衍生-气相色谱技术,建立了地表水中丙烯酰胺的分析方法。分别使用工作曲线和标准曲线对丙烯酰胺进行定量分析。实验结果表明:利用溴化衍生生成,β-二溴丙酰胺的工作曲线线性范围更宽,灵敏度更高。用乙酸乙酯萃取衍生物,萃取浓缩后进行气相色谱分析,方法检出限为0.03μg/L,工作曲线在0.20~10μg/L范围内具有良好的线性相关性。地表水样品的加标回收率为87.6%~97.8%,其相对标准偏差为2.03%~5.31%。 相似文献
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国内外燃煤电厂汞排放控制技术比较分析 总被引:1,自引:0,他引:1
概述了燃煤电厂汞排放的危害及汞迁移转化的规律;对国内外燃煤电厂的汞排放浓度情况进行了比较;指出汞排放控制技术的研究目前主要集中在燃烧前燃料脱汞、燃烧中脱汞和燃烧后烟气脱汞等方面;以美国运用较多的燃煤电厂炉前溴盐添加剂脱汞技术为案例进行分析,在煤里加入4ppm的溴,由于溴化添加剂产生的汞脱除率约64%,总汞控制率达80%,汞排放浓度约为2.6μg/m3;如果加入12ppm的溴,由于溴盐添加剂产生的汞脱除率约76%,总汞控制率可达88%,汞排放浓度约为1.56μg/m3。因此,溴盐添加剂脱汞技术对我国目前装备了SCR和湿法脱硫装置的燃煤电厂脱汞具有较大的参考价值。 相似文献
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据报道,我国今后农药使用趋势是: 1.目前大力推广使用的有9种:三环唑、富士一号、粉锈宁、特克多、水胺硫磷、混灭威、敌鼠钠盐、丁草胺、草甘膦。 2.近年内仍可继续用的有22种:井冈霉素、多菌灵、托布津、克瘟散、叶青双、叶枯宁、叶枯净、萎锈灵、克菌丹、乙磷铝、杀虫双、叶蝉散、速灭威、辛硫磷、乙酰、敌敌畏、二嗪农、乐果、氧化乐果、马拉松、二溴磷、倍硫膦。 3.逐步控制使用的有24种:百菌清、敌菌灵、401、甲胺磷、磷铵、久效磷、1605、3911、治螟灵、呋喃丹、杀虫胀、二氯苯醚菊酯、溴氰菊酯、氯氰菊酯、多虫畏、速灭杀丁、杀灭菊酯、溴甲 相似文献
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参考《化学农药环境安全评价试验准则》的相关内容,通过接触法和摄入法测定甲氰菊酯、高效氯氰菊酯、高效氯氟氰菊酯、溴氟菊酯4种拟除虫菊酯类杀虫剂对蜜蜂的毒性。结果表明,甲氰菊酯、高效氯氰菊酯、高效氯氟氰菊酯、溴氟菊酯对蜜蜂的接触毒性(24h LD50)分别为0.0501μg/只、0.0102μg/只、0.0129μg/只、0.0147μg/只,经口毒性(24h LC50)分别为7.8261mg/L、4.9163mg/L、5.9678mg/L、7.7875mg/L。根据有关评价标准,甲氰菊酯、高效氯氰菊酯、高效氯氟氰菊酯、溴氟菊酯4种拟除虫菊酯类杀虫剂对蜜蜂的毒性均为高毒,应禁止在蜜蜂活动区域使用。 相似文献
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本文采用熔融法制作含有镉(Cd)、汞(Hg)、溴(Br)、铬(Cr)、铅(Pb)等目标元素的标准样品,对定值、均匀性、稳定性引起的不确定度分量进行了分析和计算,并计算了标准样品的扩展不确定度。 相似文献
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Trametes versicolor decolorized 2000 mg L(-1) of the mono-azo substituted naphthalenic dye Amaranth with no dye sorption observed visually. The changes in the toxicity were assessed over a period of 30 d for the dye-treated viable culture, control (no dye added), and a boiled culture treated with dye, using the Microtox Acute Toxicity assay. Before dye addition, the culture filtrate had some toxicity, which increased after the dye addition. The toxicity of the dye-treated culture decreased during the treatment. The loss of toxicity occurred at the same time, with the loss of color suggesting that detoxification is associated with decoloration. The change in pH was due to natural metabolic processes and had a small effect on detoxification. Because the toxicity of the treatment was similar to that of the control at the end of the treatment, the effluent seems to be safe for release into the environment, potentially rendering this treatment suitable for industrial application. 相似文献
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泵站树状给水管网流量具有随机性,而这种随机性变化会直接影响管网的建设费用和动力费用.针对这-特点,应用随机规划原理,建立泵站树状给水管网机会约束模型,编写基于随机模拟的遗传算法程序求解该模型.机会约束模型能较客观地反映该管网的实际工况,使优化设计结果更符合实际. 相似文献
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城镇化是推动我国经济社会发展的重要动力,在高速发展的同时,带来大量污染排放,威胁乡村环境质量与可持续发展。在对乡村生态环境问题剖析的基础上,从战略、实施、方式等层面探索解决思路,围绕科学规划、发展方式、基础建设、管理机制、宣传教育等方面分析关键点,加强乡村环境保护,保障城镇化建设健康发展,为促进农村农业持续发展提供持久动力。 相似文献
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Günay Kocasoy 《Environmental management》1989,13(4):469-475
The increase in the number of tourists visiting a coast is desired by most of the countries for economic reasons. However, this increase in tourism may cause pollution of the sea. This can be only avoided by proper planning and by predicting the carrying capacity of the coast in terms of sea pollution. This is especially important for developing countries where part of the wastewater is discharged without any treatment into the sea.In the present study the beaches were classified according to their use — and consequently the amount of waste discharged into the sea — into four groups: (1) coasts that are used only for swimming and recreational purposes; (2) coasts used simultaneously for dwelling, swimming, and recreational purposes; (3) coasts along which only dwellings exist; and (4) natural and man-made harbors, i.e., coasts used as shelters. During the survey,40,320 observations were made between December 1985 and February 1988 to determine the effect of the number of tourists on seawater quality. The results obtained were analyzed by a multilinear regression program to obtain an empirical equation giving the extent of the sea pollution in terms of coliform concentration as a function of population density and some other environmental factors.The equations derived in this study enable the determination of the carrying capacity of a beach in terms of pollution as well as the expected degree of pollution corresponding to a given population density. Furthermore, it allows the prediction of the extra carrying capacity that can be obtained by improving the waste-disposal conditions. 相似文献
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阐释了信息产业专门化街区的内涵,结合对合肥市黄山路信息产业专门化街区构成要素的分类及其邻近度的分析,分别从空间结构演化、景观演化、功能演化三方面阐述了合肥市黄山路由"电子一条街"向"信息产业专门化街区"的总体演化阶段,探讨了信息产业专门化街区的未来发展趋势。 相似文献
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燃煤二氧化硫控制技术应用概况 总被引:1,自引:0,他引:1
由燃煤引起的二氧化硫污染已成为大气环境中最主要的污染因子。为解决这个问题,我国结合国外的技术成果,进行了各种脱硫技术的研究。介绍了各种治理技术应用情况,并结合实际经验对其中应注意的问题给予评述。 相似文献