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71.
催化超临界水氧化废水处理技术的研究进展 总被引:5,自引:0,他引:5
简要介绍了作为反应介质的超临界水的物化性质及超临界水氧化的特点 ,阐述了催化超临界水氧化的一般工艺流程并分析了其过程的影响因素及各影响因素的相互关系 ,归纳了超临界水氧化的催化机理、动力学、水对多相催化反应的影响以及催化剂的研究进展 ,探讨了该项技术发展的前景与趋势 相似文献
72.
近岸海域污染与生态保护 总被引:2,自引:0,他引:2
1近岸海域被污染的状况2近岸海域被污染的恶果3近岸海域污染源分析4改善海洋水质 ,重在保护生态环境我国的近岸海域严重受到氮和磷的污染 ,直接导致海水的富营养化。1996年由荷兰、英国等3家国际咨询公司完成的世界银行《杭州湾环境研究项目》 ,对长江口、杭州湾及舟山渔场地区大范围河口海域作了详细调查后得出结论为 ,“研究海域处于氮磷过营养的状况 ,在长江、杭州湾和舟山群岛的所有近岸海域 ,氮、磷浓度均大大超了海水四类标准 ;油类污染呈块状分布 ,浓度超过国家二类海水水质标准和国际上的影响评价临界值。”1997年底 ,… 相似文献
73.
阐述了高强度埋纱绿色包装袋纸是纸/塑复合或塑/塑复膜的污染环境包装材料的替代产品,生产流水线由5项专利技术为基础构成,生产原料来源充足,体现资源循环利用,生产企业经济效益显著,产品具有撕裂度,抗张强度高,抗水防潮,耐热,牢固度好,破包率低,指出产品可为国家节约大批木材,对保护森林资源贡献巨大,产品生产过程中不对环境造成污染。 相似文献
74.
Decision analysis on fire safety design based on evaluating building fire risk to life 总被引:3,自引:0,他引:3
This study presents a framework of decision analysis on fire safety design alternatives based on evaluating building fire risk to life. A probabilistic risk assessment method for occupant life is presented with consideration of some uncertainties of evacuation process and fire development at first. For occupant evacuation time assessment, occupant pre-movement time is characterized by normal distribution. For onset time to untenable conditions assessment, its uncertainty is considered as probability distribution according to the range of design fires. Based on event tree technique, probable fire scenarios are analyzed with consideration of the effect of fire protection systems, employees extinguishing, etc. It is difficult to make a precise assessment on probability and consequence of every fire scenario, but their lower bound and upper bound can be achieved based on statistical data. Therefore, Supersoft Decision Theory [Malmnäs, P.E., 1995. Methods of Evaluation in Supersoft Decision Theory. Department of Philosophy, Stockholm University, 365 Stockholm; Johansson, H., Malmnäs, P.E., 2000. Application of supersoft decision theory in fire risk assessment. Journal of Fire Protection Engineering 14, 55–84] that allows decision maker to utilize vague statement is utilized to integrate with risk assessment to make decision on different fire safety design alternatives. To express how to make decision on different fire safety design alternatives based on evaluating building fire risk to life, two hypothetical fire safety design alternatives for a commercial building are presented. 相似文献
75.
Yuanying Hu Ruofei Hu Qingzeng Zhu Jinhua Zhan Hui Liu Bingjian Yao 《Environmental Chemistry Letters》2012,10(3):275-280
This report shows an improved selective extraction of the 3,3??-dichlorobenzidine pollutant using molecularly imprinted polysiloxane microspheres (MIPS). 3,3??-Dichlorobenzidine and degradation products are of environmental concern due to their carcinogenic nature. Environmental samples containing 3,3??-dichlorobenzidine are very complex, and the concentration of 3,3??-dichlorobenzidine is usually very low. Current analysis of 3,3??-dichlorobenzidine in environmental matrices often requires cleanup and preconcentration steps that are complex and time-consuming. Therefore, we designed an improved analytical technique. MIPS were synthesized by covalent imprinting. MIPS were characterized by Fourier-transform infrared spectroscopy, nuclear magnetic resonance and transmission electron microscopy. MIPS size ranges from 150 to 250?nm. Adsorption capacity and recognition selectivity toward 3,3??-dichlorobenzidine were studied using ultraviolet spectroscopy and high-performance liquid chromatography. Compared with non-imprinted polysiloxane microspheres, results show that the amount of 3,3??-dichlorobenzidine adsorbed by MIPS is greater by a factor of ten. The binding capacity of MIPS for 3,3??-dichlorobenzidine is seven times larger than diphenylamine. MIPS exhibits high affinity to 3,3??-dichlorobenzidine and can be used for the selective extraction of 3,3??-dichlorobenzidine. 相似文献
76.
77.
Maria Knight Lapinski Rain Wuyu Liu John M. Kerr Jinhua Zhao Tsering Bum 《Environmental Communication: A Journal of Nature and Culture》2019,13(5):664-680
Interpersonal communication can influence the decisions people make about engaging in conservation behaviours. In-depth interviews with Tibetan pastoralists serve as the basis for examining interpersonal communication patterns and sources of interpersonal influence about grassland conservation behaviours. Herding and family groups are key collectives; salient sources of information vary across types of information. Salient individuals are those with credibility and means control: community leaders, elders, veterinarians, and government officials. Explicit information about conservation comes from religious leaders. The findings have significant implications for understanding the function and nature of interpersonal influence in unique population groups regarding conservation actions. 相似文献
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80.
Lingfen Kong Shaoyuan Zhu Lusheng Zhu Hui Xie Kunchang Su Tongxiang Yan Jun Wang Jinhua Wang Fenghua Wang Fengxia Sun 《环境科学学报(英文版)》2013,25(11):2257-2264
The recently discovered endosulfan-degrading bacterial strain Alcaligenesfaecalis JBW4 was isolated from activated sludge. This strain is able to use endosulfan as a carbon and energy source. The optimal conditions for the growth of strain JBW4 and for biodegradation by this strain were identified, and the metabolic products of endosulfan degradation were studied in detail. The maximum level of endosulfan biodegradation by strain JBW4 was obtained using broth at an initial pH of 7.0, an incubation temperature of 40℃ and an endosulfan concentration of I00 mg/L. The concentration of endosulfan was determined by gas chromatography. Strain JBW4 was able to degrade 87.5% of α-endosulfan and 83.9% of β-endosulfan within 5 days. These degradation rates are much higher than the previously reported bacterial strains. Endosulfan diol and endosulfan lactone were the major metabolites detected by gas chromatography-mass spectrometry; endosulfan sulfate, which is a persistent and toxic metabolite, was not detected. These results suggested that A. faecalis JBW4 degrades endosulfan via a non-oxidative pathway. The biodegradation of endosulfan by A. faecalis is reported for the first time. Additionally, the present study indicates that strain JBW4 may have potential for the biodegradation of endosulfan residues. 相似文献