Pesticide and PCB levels in fish from Alberta (Canada)

Pesticide and PCB analyses were completed on fat and muscle samples of 750 fish collected from 11 major lakes and rivers in Alberta. Although phenoxy and organophosphate residues were always below detectable limits, traces of chlorinated pesticides and their derivatives, particularly DDE, DDD and chlordane, were detected in most fat samples. Methoxychlor was frequently found in goldeye from the North Saskatchewan River but not recorded in fish from any other lake or river. Its presence in goldeye, a highly migratory species, was probably a result of biting-fly control programs in the Saskatchewan part of the river. PCB levels exceeded 25 mg/kg in the fat of several species from the North Saskatchewan River but were generally lower in the other systems. Analysis of 160 sediment samples from the North Saskatchewan River revealed no point source of PCB contamination, with residues always <0.01 mg/kg dry weight.     

生物组织中微量砷的石墨炉原子吸收法的测定

本文参考美国EPA测定生物组织中砷的样品前处理方法,利用石墨炉原子吸收法测定生物体中砷,并确定了一套完整的样品测定的质控措施,该方法保证了生物组织中砷测定的快速、准确、可靠。     

EM有效微生物技术在我国的应用研究进展

EM有效微生物技术自问世以来已经在世界各国的养殖、环保、种植等领域广泛应用，本文详细介绍了EM生物技术在我国环境保护、种植业、养殖业等方面的应用。     

生物环境条件对军用电工电子产品的影响研究

针对军用电工电子产品储存过程中存在生物环境条件的实际情况,介绍了主要影响因素霉菌生存的环境条件,详细分析了霉菌对电工电子产品的影响,为产品的选材、结构和设计提供依据,保证产品能在有大量霉菌存在的环境中安全可靠地运行。     

邻硝基对氯苯胺项目环评恶臭污染防治分析

在分析活性炭吸附法和生物洗涤塔对邻硝基对氯苯胺生产过程中产生的恶臭污染物质处理效果的基础上,提出了冷凝回收后生物洗涤塔处理的优化处理工艺,并进行了处理效果的实验论证,确认经该工艺处理后的氯苯类有机废气能够达标排放。