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931.
Jiao Fengchao Ren Lijun Wang Xu Liu Wenjie 《Environmental science and pollution research international》2017,24(17):15001-15011
Environmental Science and Pollution Research - The spatial–temporal changing characteristics and potential ecological risk combined with local policies and industrial status were analyzed.... 相似文献
932.
Yong Jiang Henglong Xu Xiaozhong Hu Alan Warren Weibo Song 《Environmental science and pollution research international》2013,20(8):5272-5280
Ciliated protozoa (ciliates) play important ecological roles in coastal waters, especially regarding their interaction with environmental parameters. In order to increase our knowledge and understanding on the functional structure of ciliate communities and their relationships to environmental conditions in marine ecosystems, a 12-month study was carried out in a semi-enclosed bay in northern China. Samples were collected biweekly at five sampling stations with differing levels of pollution/eutrophication, giving a total of 120 samples. Thirteen functional groups of ciliates (A–M) were defined based on their specific spatio-temporal distribution and relationships to physico-chemical parameters. Six of these groups (H–M) were the primary contributors to the ciliate communities in the polluted/eutrophic areas, whereas the other seven groups (A–G) dominated the communities in less polluted areas. Six groups (A, D, G, H, I and K) dominated during the warm seasons (summer and autumn), with the other seven (B, C, E, F, J, L and M) dominating in the cold seasons (spring and winter). Of these, groups B (mainly aloricate ciliates), I (aloricate ciliates) and L (mainly loricate tintinnids) were the primary contributors to the communities. It was also shown that aloricate ciliates and tintinnids represented different roles in structuring and functioning of the communities. The results suggest that the ciliate communities may be constructed by several functional groups in response to the environmental conditions. Thus, we conclude that these functional groups might be potentially useful bioindicators for bioassessment and conservation in marine habitats. 相似文献
933.
介绍了锦州东港电力有限公司地震台多年来应用超低频电磁信息探索地震前兆所总结出的异常形态分别与远震、近震、地方震的对应实例,揭示了ULF电磁波异常与将要发生地震映震的一些初步规律,说明了电磁波是地震短临预报的好方法。 相似文献
934.
935.
936.
ClO2治理医院污水性能参数的研究 总被引:7,自引:0,他引:7
研究了ClO2作为消毒剂在去除医院污水中总大肠菌群数(CFU)时的性能参数.实验结果表明,ClO2加入量为5-8 mg/L、温度为20-30℃、接触时间为30-60min、pH为7.8-8.5、填料为组合型,是ClO2去除CFU的最优参数,可使污水中CFU降至500个/L,达到国家一级排放标准(GB8978-1996).同时,分析了各参数对CFU去除率的影响. 相似文献
937.
紫外-Fenton试剂的作用机理及在废水处理中的应用 总被引:29,自引:0,他引:29
本文研究了紫外光、铁离子对过氧化氢的催化分解作用.证实了紫外光和铁离子对过氧化氢的催化分解存在协同效应,并通过研究三价铁离子与紫外光的相互作用,探讨了协同效应产生的机理.UV-Fenton试剂对硝基苯、十二烷基苯磺酸钠(DBS)模拟废水的处理结果表明:将紫外光引入Fenton试剂可大大提高Fen-ton试剂的氧化性能,对生物难降解或难化学氧化的有机污染物具有良好的处理效果. 相似文献
938.
突发性藻类污染常常伴随着藻类的肆意滋生,从而严重影响着水厂的正常运行,更加威胁着居民用水的水质安全。采用弹性填料生物接触氧化工艺处理含藻原水,分析考察了不同水力停留时间、气水比和藻类浓度条件下反应器对藻类去除效果的影响。结果表明,最佳HRT为1.0 h,最佳气水比为1.2:1;采用最佳工艺条件处理叶绿素a(Chl-a)为70 mg/m3的高藻原水时,Chl-a、CODMn和NH4+-N的去除率分别达到65.48%、47.81%和70.54%,且CODMn和NH4+-N的出水浓度能够达到东深供水工程处理目标。说明在该最佳工艺条件下,原水中藻类能够被有效地控制和去除,出水水质稳定,工艺适应性强。 相似文献
939.
This paper, based on the autonomy concept, continues to investigate hierarchical forms and spatial structure of ecosystems. The former can lead to limits for the selection of the component parts of an ecosystem and a distinction between its endogenous and exogenous variables; and the latter can be lead to a hypothesis of the space of an ecosystem: the space of an ecosystem = its habitat area + supporting area + impact area, and two characteristics of ecosystems, space-overlapping and the area of ecosystem space, have been further studied referring to human activities. 相似文献
940.
Asadyar Leila Xu Cheng-Yuan Wallace Helen M. Xu Zhihong Reverchon Frédérique Bai Shahla Hosseini 《Environmental science and pollution research international》2021,28(6):6684-6690
Environmental Science and Pollution Research - Biochar has strong potential to improve nitrogen (N) use efficiency in both agricultural and horticultural systems. Biochar is usually co-applied with... 相似文献