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141.
乙烯撑二氨基苯磺酸生产中磺化废酸的处理 总被引:1,自引:0,他引:1
对乙烯撑二氨基苯磺酸生产过程中产生的磺化废酸采用浓缩法进行处理,得到的浓硫酸顺生产中使用。废酸浓缩装置的工艺简单,投资少,建设周期短,运行平稳,1年内即可收回投资,经济效益显著。该装置的建成投产,大大改善了周围环境,具有明显的环境效益。 相似文献
142.
The influence of zoonotic pathogens in animal manure on human health and well-being as a direct or indirect cause of human enteric illness is examined. Available international data are considered, but the study is focused on the developing situation in western Canada, where it is certain there will be further rapid growth in livestock numbers, particularly hogs. Major pathogens considered are Escherichia coli O157:H7, Salmonella, Campylobacter, Yersinia, Cryptosporidium, and Giardia. Canada is now the leading exporter of pork internationally, but recent increases in production contrast with constant domestic levels of pork consumption and declining levels of foodborne illness caused by pork. Effects of increased levels of manure production are not quantifiable in terms of effects on human health. The presence of major pathogens in manure and movement to human food sources and water are considered on the basis of available data. Survival of the organisms in soil, manure, and water indicate significant variability in resistance to environmental challenge that are characteristic of the organisms themselves. Generally, pathogens survived longer in environmental samples at cool temperatures but differences were seen in liquid and solid manure. Based on actual data plus some data extrapolated from cattle manure environments, holding manure at 25 degrees C for 90 d will render it free from the pathogens considered above. 相似文献
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寒冷地区化粪池具有水温低,处理效果差的特点,针对哈尔滨市幸福家园化粪池的水质情况进行了研究,为化粪池的改造和优化提供依据,并对化粪池问题和技术进行探讨。在化粪池前后的检查井处进行取样,每隔1个小时取一个样,总共取24小时,然后对CODtot、CODss、CODcol、CODdis、NH3-N、总氮、总磷、SS、VSS、pH、水温进行测定。水温在14~17度下,平均去除率分别是16.9%、47.2%、26.4%、-49.1%、-39.3%、7.5%、12.4%、59.3%和59.5%,可见,污水的可生化性有明显提高,但是对污染物的去除作用不大。研究结果对于全面评价寒冷地区化粪池的功能特征,进而为化粪池的取舍和改造提供技术的参考依据。 相似文献
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146.
Fate of polybrominated diphenyl ethers in the environment of the Pearl River Estuary, South China 总被引:1,自引:0,他引:1
Yu-Feng Guan O.S. Samuel Sojinu Eddy Y. Zeng 《Environmental pollution (Barking, Essex : 1987)》2009,157(7):2166-2172
Ninety-six riverine runoff samples collected at eight major outlets in the Pearl River Delta (PRD), South China, during 2005-2006 were analyzed for 17 brominated diphenyl ether (BDE) congeners (defined as Σ17PBDE). Fourteen and 15 congeners were detected, respectively, in the dissolved and particulate phases. These data were further used to elucidate the partitioning behavior of BDE congeners in riverine runoff. Several related fate processes, i.e. air-water exchange, dry and wet deposition, degradation, and sedimentation, within the Pearl River Estuary (PRE), were examined to estimate the inputs of Σ10PBDE (sum of the target BDE congeners, BDE-28, -47, -66, -85, -99, -100, -138, -153, -154, and -183) and BDE-209 from the PRD to the coastal ocean based on mass balance considerations. The results showed that annual outflows of Σ10PBDE and BDE-209 were estimated at 126 and 940 kg/year, respectively from the PRE to coastal ocean. Besides sedimentation and degradation, the majority of Σ10PBDE and BDE-209 discharged into the PRE via riverine runoff was transported to the coastal ocean. 相似文献
147.
废旧电路板与碳酸钙共热解脱卤的研究 总被引:4,自引:1,他引:3
采用热重分析仪和石英管式炉热解反应器,分别对以酚醛树脂为基板的废旧电路板和混合碳酸钙后的废旧电路板进行热解实验研究,着重考察了添加碳酸钙后的酚醛树脂基板废旧电路板热解特性及添加量不同对卤素脱除效果的影响。实验结果表明,碳酸钙的加入对废旧电路板的降解行为和热解油的基本组成没有明显的影响,但热解油的各组分含量有所差异;随着热解温度的提高或者CaCO3含量的增多,卤素可以更多地由有机卤向无机卤转变并束缚在固体残渣中,由此得到较好的脱卤效果。当60%PR-WPCBs与40%CaCO3共热解,热解油中的溴化物也减少了7.6% 。在600℃等量CaCO3与PR-WPCBs共热解时生成75.6%无机卤,其中70.62%束缚于固体残渣中,可见达到较好的脱卤效果。 相似文献
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149.
Ilker T. Telci Kijin Nam Jiabao Guan Mustafa M. Aral 《Journal of environmental management》2009,90(10):2987-2998
Typical tasks of a river monitoring network design include the selection of the water quality parameters, selection of sampling and measurement methods for these parameters, identification of the locations of sampling stations and determination of the sampling frequencies. These primary design considerations may require a variety of objectives, constraints and solutions. In this study we focus on the optimal river water quality monitoring network design aspect of the overall monitoring program and propose a novel methodology for the analysis of this problem. In the proposed analysis, the locations of sampling sites are determined such that the contaminant detection time is minimized for the river network while achieving maximum reliability for the monitoring system performance. Altamaha river system in the State of Georgia, USA is chosen as an example to demonstrate the proposed methodology. The results show that the proposed model can be effectively used for the optimal design of monitoring networks in river systems. 相似文献
150.