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排序方式: 共有1091条查询结果,搜索用时 46 毫秒
911.
高浓度脱浆污水的湿式氧化法处理研究 总被引:1,自引:0,他引:1
介绍了采用湿式空气氧化法(WAO)对来自香港两个纺织工厂的脱浆污水进行处理的效果。所用装置为1台2L的高温高压釜。操作工况为:温度150 ̄290℃,氧分压0.375 ̄2.25MPa。在每个试验的不同过程中监测了pH值、COD、TOC的变化,以评估各个过程的转化效果。还研究了温度、氧分压及反应时间对处理效果的影响。对生化性很差的化学纤维脱浆污水,其COD、TOC去除率分别达到90%和80%。 相似文献
912.
Specific industrial processes and its waste characteristics should be known for proper management and control of the wastes produced from industries. Some industrial processes and waste characteristics are introduced to explain how to deal with the wastes for waste characterization. Evaluation methods of biodegradability of industrial wastewater were introduced in order for environmental engineers to be able to decide the proper treatment method of the industrial wastewaters. Industrial processes and characterization discussed in this section might be useful for the selection of suitable methods to prevent pollutant discharge from industrial processes. 相似文献
913.
Nguyen Thi Yen N. T. K. Oanh Lars Baetz Reutergardh Donald L. Wise Nguyen Thi Thu Lan 《Resources, Conservation and Recycling》1996,18(1-4)
An integrated investigation on wastewater characterization and the environmental effects from the COGIDO pulp and paper mill in Bien Hoa Industrial Estate, Vietnam, a chlorine bleached soda integrated pulp and paper mill operating without a chemical recovery system, on the receiving water body was conducted during the rainy and dry seasons in 1993 and 1995. The pollution load from the mill was very high in terms of BOD, COD and SS (CODm: 58.7 t/d; BOD: 33.3 t/d and SS: 25.1 t/d). The effluent toxicity was determined using four toxicity tests: the green micro-alga, Selenastrum capricornutum, Microtox (marine bacteria: Photobacterium phosphoreum), the duckweed, Lemna aequinoctialis, and fish (silver barb: Puntius gonionotus, and Tilapia: Tilapia nilotica). Selenastrum capricornutum was the most sensitive among the tested organisms. The mill toxicity emission rate (TER) was as high as 338 610 (Selenastrum test). The bleaching-pulp and semi-chemical pulp plants which contributed the largest pollution load to the total COGIDO effluent, therefore, were targeted for abatement measures. Physico-chemical parameters as well as qualitative and quantitative aquatic organism composition for the river water were established. The BOD5 and COD values exceeded the potable surface water standard by a factor of 2 to 4. The species diversity and abundance of the phytoplankton, zooplankton and zoobenthos were found to be lower (20–40%) than that of unpolluted rivers in Vietnam, whereas pollution-indicator species increased up to four times during the dry season 1995. 相似文献
914.
Peter N. Swift 《Environmental management》1993,17(1):83-97
The United States Department of Energy is developing the Waste Isolation Pilot Plant (WIPP) in southeastern New Mexico for
the disposal of transuranic wastes generated by defense programs. Because changes in climate during the next 10,000 years
(10 ka) may affect performance of the repository, an understanding of long-term climate variability is essential for evaluating
regulatory compliance.
Fluctuations in global climate corresponding to glaciation and deglaciation of the northern hemisphere have been regular in
both frequency and amplitude for at least 780 ka. Coolest and wettest conditions in the past have occurred at the WIPP during
glacial maxima, when the North American ice sheet reached its southern limit roughly 1200 km north of the WIPP and deflected
the jet stream southward. Average precipitation in southeastern New Mexico during the last glacial maximum 22-18 ka before
present (BP) was approximately twice that of the present. Driest conditions (precipitation approximately 90% of present) occurred
6.5-4.5 ka BP, after the ice sheet had retreated to its present location. Wet periods of unknown duration have occurred since
the retreat of the ice sheet, but none have exceeded glacial conditions. Global climate models suggest that anthropogenic
climate changes (i.e., warming caused by an increased greenhouse effect) will not result in an increase in precipitation at
the WIPP. The climate of the last glacial maximum is therefore suitable for use as a cooler and wetter limit for variability
during the next 10 ka. 相似文献
915.
本文介绍了采用WX型可调喷射器后可使炼油厂污水处理的传统浮选工艺流程大为简化。试运行结果表明:这项新措施既提高了浮选效果又降低了能耗,并且能够长周期平稳运行,从而提高了浮选后的水质,确保污水处理正常运行,同时经济效益可观。 相似文献
916.
以苛性法软化油田采出水用作锅炉给水的处理新工艺 总被引:1,自引:0,他引:1
在应用蒸汽开采重油(稠油)生产中,常因采出水不需回注而带来环境保护上的问题。较适宜的处置方法是将采出水处理后作为发生蒸汽的锅炉给水。而软化具高矿化度的采出水使其符合硬度指标要求极为严格的锅炉用水,是处理工艺中关键技术之一。本文对美国当前在这方面的一般处置方法作了综合性介绍,着重介绍了Belridge油田水软化处理厂采用苛性法和弱离子交换法这一新工艺的成功经验。 相似文献
917.
由于固井质量不合格或是套管破裂、错断引起的油井和水井套返污水,造成了吉林油田老油区普遍的环境污染。从1990年开始,通过反复的摸索和试验,提出并逐渐完善了两种切实可行的治理方法,即封堵剂法和封隔器法。实践证明,效果良好。 相似文献
918.
含硫污水处理方法综述 总被引:1,自引:1,他引:1
本文参考国内外文献及技术资料,较全面地论述了各种含硫污水处理方法的优缺点,供从事油气田污水处理的同志参考。 相似文献
919.
不合理地片面强调钻井废水的回用,是造成废水处理质量不高的重要原因之一。现在根据钻井生产的特点,分析讨论了钻井废水回用率合理控制的必要性,同时提出分阶段控制回用率的方法。现场实践证明,在这个方法实施的基础上,再加上一些有效的辅助措施,能有效地提高钻井废水达标率并减轻其对环境的污染。 相似文献
920.