全文获取类型
收费全文 | 185篇 |
免费 | 1篇 |
国内免费 | 61篇 |
专业分类
安全科学 | 12篇 |
废物处理 | 2篇 |
环保管理 | 16篇 |
综合类 | 143篇 |
基础理论 | 34篇 |
污染及防治 | 35篇 |
评价与监测 | 5篇 |
出版年
2023年 | 8篇 |
2022年 | 7篇 |
2021年 | 10篇 |
2020年 | 12篇 |
2019年 | 16篇 |
2018年 | 10篇 |
2017年 | 7篇 |
2016年 | 11篇 |
2015年 | 18篇 |
2014年 | 7篇 |
2013年 | 9篇 |
2012年 | 9篇 |
2011年 | 12篇 |
2010年 | 7篇 |
2009年 | 4篇 |
2008年 | 5篇 |
2007年 | 12篇 |
2006年 | 13篇 |
2005年 | 13篇 |
2004年 | 13篇 |
2003年 | 6篇 |
2002年 | 7篇 |
2001年 | 5篇 |
2000年 | 8篇 |
1999年 | 7篇 |
1998年 | 3篇 |
1997年 | 2篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1994年 | 2篇 |
1987年 | 1篇 |
排序方式: 共有247条查询结果,搜索用时 500 毫秒
101.
垃圾渗滤液浓度高、成分复杂,难以处理,常规生化处理方法存在缺点,碟管式反渗透(DTRO)是针对垃圾渗滤液的水质特点而设计的,出水水质好,受进水水质影响很小,在国外的垃圾渗滤液处理中应用广泛。在分析DTRO工艺特点的基础上,探讨了两级DTRO工艺流程、特点、机理和浓缩液的处理方法,并论述了DTRO运行参数对膜片性能的影响。掌握系统运行和膜清洗时各项参数对膜性能的影响趋势,优化预处理工艺对降低处理成本,指导同类工艺的优化操作具有一定的参考价值。 相似文献
102.
染料厂、农药厂、制药厂等工业都会产生含有高浓度苯胺的废水,处理苯胺废水的方法较多,本文通过实验的方式着重研究了膜萃取法处理高浓度苯胺废水,并通过分析实验结果得出了相应结论。 相似文献
103.
Ajay K. Manna Andrew R. Martin 《Environmental pollution (Barking, Essex : 1987)》2010,158(3):805-1394
Experimental investigations were carried out on removal of arsenic from contaminated groundwater by employing a new flat-sheet cross flow membrane module fitted with a hydrophobic polyvinylidenefluoride (PVDF) microfiltration membrane. The new design of the solar-driven membrane module in direct contact membrane distillation (DCMD) configuration successfully produced almost 100 per cent arsenic-free water from contaminated groundwater in a largely fouling-free operation while permitting high fluxes under reduced temperature polarization. For a feed flow rate of 0.120 m3/h, the 0.13 μm PVDF membrane yielded a high flux of 74 kg/(m2 h) at a feed water temperature of 40 °C and, 95 kg/m2 h at a feed water temperature of 60 °C. The encouraging results show that the design could be effectively exploited in the vast arsenic-affected rural areas of South-East Asian countries blessed with abundant sunlight particularly during the critical dry season. 相似文献
104.
以国内某浸没式MBR再生水工程为研究对象,在次临界通量及恒抽吸流量运行条件下,系统跨膜压差表现为早期短暂升高、中期平稳上升及后期快速升高的三阶段特征。扫描电子显微镜(SEM)观察证明MBR系统在三阶段的膜污染层具有不同的水力学结构。结合各阶段膜污染的理论分析,将临界跨膜压差值(TMP)作为膜系统体外维护清洗的控制点,实现膜系统的长期稳定运行。 相似文献
105.
An Ding Yingxue Zhao Zhongsen Yan Langming Bai Haiyang Yang Heng Liang Guibai Li Nanqi Ren 《Frontiers of Environmental Science & Engineering》2020,14(4):59
106.
综述了活性污泥法、膜生物反应器、人工湿地等国内外常见抗生素生化去除方法的优缺点与适用范围,通过工艺对比发现,膜生物反应器和人工湿地能有效去除污水中的抗生素,活性污泥法对抗生素的去除率不高,且选择性较强;污泥龄和水力停留时间对抗生素的去除率有着显著影响,多数情况下反应器的运行改进也能提高抗生素的去除效果。针对抗生素污染问题,提出了采取加强型的复合式处理工艺、开展分区研究、出台相关管理政策等建议。 相似文献
107.
Kayleigh Brown Avik J. Ghoshdastidar Jillian Hanmore James Frazee Anthony Z. Tong 《Waste management (New York, N.Y.)》2013,33(11):2188-2194
Compost leachate forms during the composting process of organic material. It is rich in oxidizable organics, ammonia and metals, which pose a risk to the environment if released without proper treatment. An innovative method based on the membrane bioreactor (MBR) technology was developed to treat compost leachate over 39 days. Water quality parameters, such as pH, dissolved oxygen, ammonia, nitrate, nitrite and chemical oxygen demand (COD) were measured daily. Concentrations of caffeine and metals were measured over the course of the experiment using gas chromatography – mass spectrometry (GC/MS) and inductively coupled plasma – mass spectrometry (ICP–MS) respectively. A decrease of more than 99% was achieved for a COD of 116 g/L in the initial leachate. Ammonia was decreased from 2720 mg/L to 0.046 mg/L, while the nitrate concentration in the effluent rose to 710 mg/L. The bacteria in the MBR system adjusted to the presence of the leachate, and increased 4 orders of magnitude. Heavy metals were removed by at least 82.7% except copper. These successful results demonstrated the membrane bioreactor technology is feasible, efficient method for the treatment of compost leachate. 相似文献
108.
HSMBR系统表现了对于COD高且稳定的去除效果。对于TN、TP,由于不排泥,污泥浓度的升高,并且填料内部的生物膜不断形成,以及在填料内部的污泥受曝气的扰动小,而变的较为密实,反应器内形成好氧、缺氧两种微环境并存,有利于系统对于TN、TP去除率的提高。 相似文献
109.
The technique that employs flash freezing and environmental scanning electron microscopy (ESEM) was utilised for detailed investigation of the fouling materials in a membrane bioreactor (MBR). The method involves the flash freezing of a wet sample in liquid nitrogen for 10 s to preserve its structure for direct ESEM observation with a high image resolution. ESEM images show that the sludge cake formed by simple filtration of the MBR bulk sludge has a highly porous, sponge-like structure with a fairly low resistance. However, the fouling layer attached to the membrane surface contains a thin gel layer under the main body of the sponge-like sludge cake, which is similar to that formed by filtration of a dispersion of biopolymer clusters (BPCs). It is apparent that BPCs tend to accumulate on the membrane surface, and the gel layer is largely responsible for the high filtration resistance of the cake layer on the fouled membranes. 相似文献
110.