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排序方式: 共有1180条查询结果,搜索用时 31 毫秒
941.
Wang Wensheng Cheng Yongchun Tan Guojin Liu Ziyu Shi Chenglin 《Journal of Material Cycles and Waste Management》2018,20(3):1710-1723
Journal of Material Cycles and Waste Management - The objective of this study was to use two kinds of waste oil shale ash (OSA) as partial replacements of conventional mineral filler for evaluating... 相似文献
942.
Han Jingwen Hu Lin He Leqing Ji Kang Liu Yaqing Chen Can Luo Xiaomei Tan Ni 《Environmental science and pollution research international》2020,27(30):37313-37323
Environmental Science and Pollution Research - The preparation, characterization, and uranium (VI) adsorption properties of tri-amidoxime modified marine fungus material (ZZF51-GPTS-EDA-AM/ZGEA)... 相似文献
943.
944.
Shuguang Liu Bo Tan Chaomeng Dai Sha Lou An Tao Guihui Zhong 《Environmental science and pollution research international》2015,22(24):20101-20113
945.
946.
Ken Tan Zhenwei Wang Weiweng Chen Zongwen Hu Benjamin P. Oldroyd 《Die Naturwissenschaften》2013,100(3):245-248
An ‘I see you’ (ISY) prey–predator signal can co-evolve when such a signal benefits both prey and predator. The prey benefits if, by producing the signal, the predator is likely to break off an attack. The predator benefits if it is informed by the signal that the prey is aware of its presence and can break off what is likely to be an unsuccessful and potentially costly hunt. Because the signal and response co-evolve in two species, the behaviour underlying an ISY signal is expected to have a strong genetic component and cannot be entirely learned. An example of an ISY signal is the ‘shimmering’ behaviour performed by Asian hive bee workers in the presence of their predator Vespa velutina. To test the prediction that bee–hornet signalling is heritable, we let honey bee workers of two species emerge in an incubator so that they had never been exposed to V. velutina. In Apis cerana, the shimmering response developed 48 h post-emergence, was strong after 72 h and increased further over 2 weeks. In contrast, A. mellifera, which has evolved in the absence of Asian hornets, did not produce the shimmering signal. In control tests, A. cerana workers exposed to a non-threatening butterfly did not respond with the shimmering signal. 相似文献
947.
预氧化技术是随着油田污水处理的需要发展起来的一种新技术。预氧化的目的就是把二价铁离子转化为三价铁,并在后期通过添加化学药剂沉淀出来,从而提高水质稳定性,降低后续处理过程的结垢现象。目前采用的预氧化技术主要有两种:化学预氧化和电化学预氧化。详细介绍预氧化技术,并通过与传统工艺技术的对比总结了预氧化技术的特点;分析了两种预氧化技术的异同;并通过这两种技术在油田的实际应用情况对它们的应用水质、运行管理、加药情况等方面进行了对比研究,总结了两种技术的优缺点及适用水质,并对该技术以后的推广应用提出相应建议。 相似文献
948.
基于DOC+CDPF后处理技术的公交车实际道路颗粒物排放特性 总被引:2,自引:1,他引:1
利用车载排放测试系统,对柴油公交车安装氧化催化转化器(DOC)+催化型颗粒捕集器(CDPF)前后的实际道路工况颗粒物排放特性进行了研究。安装DOC+CDPF前后,稳态工况下,颗粒物数量排放(PN)、质量排放(PM)分别在车速为25,30 km/h降幅最大;瞬态工况下,随着加速度的增加,PN、PM排放率降幅逐渐增大;颗粒粒径分布规律不同,安装前呈单峰或双峰分布,而安装后呈三峰分布,粒径124.1 nm左右降幅最大。 相似文献
949.
环境监管能力是环境保护工作开展的重要支撑和保障,"十一五"以来环境监管能力建设取得显著成效。面对未来日趋严峻的环保形势,"十二五"期间国家环境监管能力建设需求尤为突出。本文从"十二五"环境监管能力建设的阶段特点和需求出发,明确以加强顶层设计、强化协调推进、强调集成效应原则的基本思路,研究提出环境监管各领域建设的重点。 相似文献
950.
Jingwen Xu Yongguang Yin Zhiqiang Tan Bowen Wang Xiaoru Guo Xia Li Jingfu Liu 《环境科学学报(英文版)》2019,31(4):109-117
Biochar is extensively used as an effective soil amendment for environmental remediation. In addition to its strong contaminant sorption capability, biochar also plays an important role in chemical transformation of contaminant due to its inherent redox-active moieties. However, the transformation efficiency of inorganic contaminants is generally very limited when the direct adsorption of contaminants on biochar is inefficient. The present study demonstrates the role of Fe ion as an electron shuttle to enhance Cr(VI) reduction by biochars. Batch experiments were conducted to examine the effects of Fe(III) levels, pyrolysis temperature of biochar, initial solution pH, and biochar dosage on the efficiency of Cr(VI) removal. Results showed a significant enhancement in Cr(VI) reduction with an increase in Fe(III) concentration and a decrease of initial pH. Biochar produced at higher pyrolysis temperatures (e.g., 700°C) favored Cr(VI) removal, especially in the presence of Fe(III), while a higher biochar dosage proved unfavorable likely due to the agglomeration or precipitation of biochar. Speciation analysis of Fe and Cr elements on the surface of biochar and in the solution further confirmed the role of Fe ion as an electron shuttle between biochar and Cr(VI). The present findings provide a potential strategy for the advanced treatment of Cr(VI) at low concentrations as well as an insight into the environmental fate of Cr(VI) and other micro-pollutants in soil or aqueous compartments containing Fe and natural or engineered carbonaceous materials. 相似文献