全文获取类型
收费全文 | 169篇 |
免费 | 3篇 |
国内免费 | 70篇 |
专业分类
安全科学 | 5篇 |
废物处理 | 11篇 |
环保管理 | 13篇 |
综合类 | 138篇 |
基础理论 | 11篇 |
污染及防治 | 57篇 |
评价与监测 | 7篇 |
出版年
2023年 | 1篇 |
2022年 | 6篇 |
2021年 | 5篇 |
2020年 | 2篇 |
2019年 | 8篇 |
2018年 | 6篇 |
2017年 | 2篇 |
2016年 | 2篇 |
2015年 | 6篇 |
2014年 | 8篇 |
2013年 | 12篇 |
2012年 | 18篇 |
2011年 | 14篇 |
2010年 | 7篇 |
2009年 | 13篇 |
2008年 | 17篇 |
2007年 | 13篇 |
2006年 | 20篇 |
2005年 | 10篇 |
2004年 | 12篇 |
2003年 | 13篇 |
2002年 | 7篇 |
2001年 | 11篇 |
2000年 | 6篇 |
1999年 | 2篇 |
1998年 | 4篇 |
1997年 | 5篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1994年 | 2篇 |
1993年 | 3篇 |
1992年 | 2篇 |
1991年 | 1篇 |
排序方式: 共有242条查询结果,搜索用时 890 毫秒
111.
人工湿地系统处理鸡粪污水的技术经济可行性 总被引:5,自引:0,他引:5
介绍了人工湿地系统的组合方式和工艺流程,污染物去除率的测定,生化反应动力学参数,投资和运行费用的分析等内容。经该系统处理后,污染物总的去除率,COD_(cr)为93.0%—98.2%,BOD_5为93.5%—99.6%,NH_3—N约为94%。其中,厌氧沟的设置,是系统的独创之处,经运行结果证明,它在整个系统中对有机污染物的去除起很大作用。 相似文献
112.
113.
114.
115.
采用厌氧-好氧序列间歇反应器-混凝沉淀组合工艺,处理碱法草浆造纸中段废水。结果表明,经8.0h厌氧搅拌处理和5.0h好氧曝气处理,进水CODcr为729.1-2239mg/L,出水CODCr小于550mg/L,CODCr去除率在66.2%-76.3%之间,再经混凝沉淀处理,出水CODCr小于200mg/L,色度小于50倍,满足国家造纸工业水污染物排放标准中的二级标准。 相似文献
116.
Lallai A Mura G Palmas S Polcaro AM Baraccani L 《Environmental science and pollution research international》2003,10(4):221-224
Olive mill wastewater contains some phenolic compounds that cause antibacterial activity of a kind that prevents biological treatment without previous dilution. Among these phenolic compounds, p-hydroxybenzoic acid (PHB) is considered to be one of the most representative. This work examines the biodegradation of PHB by aerobic microbial mixed cultures previously acclimatized to glucose, which was used as an easily biodegradable model compound. Microbial growth runs were carried out in a batch reactor in the PHB concentration range of 200-1000 mg/L. In all the runs the PHB proved to be completely degradable. The specific growth rates obtained were in the range of 0.16-0.35 l/h. Experimental runs showed that the functional relationship between the specific growth rate and PHB concentration was that proposed by Monod. The kinetic constants of the Monod equation (mu(max) and K(S)) and biomass yield coefficient (Y) were determined experimentally. With the parameter values thus obtained, a mathematical model that also takes account of the duration of the lag phase was employed to describe both the microbial growth and the consumption of PHB. The concentration values of the model fit well with the data obtained experimentally. 相似文献
117.
118.
结合近年来国内外学者关于好氧污泥颗粒化的研究成果,对影响好氧污泥颗粒化的影响因素进行了较为深入系统的分析,提出了适宜的运行控制条件及所需注意的问题。 相似文献
119.
Laboratory batch experiments have been performed with sediment and groundwater obtained from two sites in Denmark to study the aerobic biodegradation of vinyl chloride (VC) and cis-1,2-dichloroethylene (c-1,2-DCE) to assess the natural aerobic biodegradation potential at two sites. The experiments revealed that VC was degraded to below the detection limit within 204 and 57 days at the two sites. c-1,2-DCE was also degraded in the experiments but not completely. At the two sites 50% and 35% was removed by the end of the experimental period of 204 and 274 days. The removal of c-1,2-DCE seems to occur concomitantly with VC indicating that the biodegradation of c-1,2-DCE may depend on the biodegradation of VC. However, in both cases natural groundwater was mixed with sediment and consequently there may be other compounds (e.g. ammonium, natural organic compound etc.) that serves as primary substrates for the co-metabolic biodegradation of c-1,2-DCE. At one of the sites methane was supplied to try to enhance the biodegradation of VC and c-1,2-DCE. That was successful since the time for complete biodegradation of VC decreased from 204 days in the absence of methane to 84 days in the presence of methane. For c-1,2-DCE the amount that was biodegraded after 204 days increased from 50% to 90% as a result of the addition of methane. It seems like a potential for natural biodegradation exists at least for VC at these two sites and also to some degree for c-1,2-DCE. 相似文献
120.
Nuan Yang Guoqiang Zhan Tingting Wu Yanyan Zhang Qinrui Jiang Daping Li Yuanying Xiang 《环境科学学报(英文版)》2018,30(4):216-224
To investigate the effect of air-exposed biocathode(AEB) on the performance of singlechamber microbial fuel cell(SCMFC), wastewater quality, bioelectrochemical characteristics and the electrode biofilms were researched. It was demonstrated that exposing the biocathode to air was beneficial to nitrogen removal and current generation. In Test 1 of 95%AEB, removal rates of ammonia, total nitrogen(TN) and chemical oxygen demand(COD)reached 99.34% ± 0.11%, 99.34% ± 0.10% and 90.79% ± 0.12%, respectively. The nitrogen removal loading rates were 36.38 g N/m~3/day. Meanwhile, current density and power density obtained at 0.7 A/m3 and 104 m W/m~3 respectively. Further experiments on opencircuit(Test 2) and carbon source(Test 3) indicated that this high performance could be attributed to simultaneous biological nitrification/denitrification and aerobic denitrification, as well as bioelectrochemical denitrification. Results of community analysis demonstrated that both microbial community structures on the surface of the cathode and in the liquid of the chamber were different. The percentage of Thauera, identified as denitrifying bacteria, maintained at a high level of over 50% in water, but decreased gradually in the AEB. Moreover, the genus Nitrosomonas, Alishewanella, Arcobacter and Rheinheimera were significantly enriched in the AEB, which might contribute to both enhancement of nitrogen removal and electricity generation. 相似文献