全文获取类型
收费全文 | 253篇 |
免费 | 4篇 |
国内免费 | 116篇 |
专业分类
安全科学 | 1篇 |
废物处理 | 10篇 |
环保管理 | 25篇 |
综合类 | 171篇 |
基础理论 | 70篇 |
污染及防治 | 78篇 |
评价与监测 | 17篇 |
社会与环境 | 1篇 |
出版年
2023年 | 17篇 |
2022年 | 31篇 |
2021年 | 17篇 |
2020年 | 17篇 |
2019年 | 34篇 |
2018年 | 24篇 |
2017年 | 9篇 |
2016年 | 17篇 |
2015年 | 14篇 |
2014年 | 10篇 |
2013年 | 19篇 |
2012年 | 13篇 |
2011年 | 24篇 |
2010年 | 5篇 |
2009年 | 13篇 |
2008年 | 26篇 |
2007年 | 8篇 |
2006年 | 10篇 |
2005年 | 6篇 |
2004年 | 2篇 |
2003年 | 13篇 |
2002年 | 6篇 |
2001年 | 12篇 |
2000年 | 6篇 |
1999年 | 2篇 |
1998年 | 2篇 |
1997年 | 6篇 |
1996年 | 2篇 |
1994年 | 3篇 |
1993年 | 2篇 |
1992年 | 3篇 |
排序方式: 共有373条查询结果,搜索用时 31 毫秒
291.
论生物监测室的建设与管理——微生物分析室部分 总被引:1,自引:1,他引:0
本文依据微生物学实验的基本规范,针对市、县环境监测站的特点,结合笔者十多年的工作体会,对生物监测室的微生物分析室的建设与管理,进行了较系统全面的论述,并提出了几个值得探讨的问题。 相似文献
292.
Guangjiao Chen Lan Lin Ying Wang Zikun Zhang Wenzhi Cao Yanlong Zhang 《Frontiers of Environmental Science & Engineering》2023,17(8):103
293.
Bing Zhang Chenxiang Sun Huimin Lin Wei Liu Wentao Qin Tan Chen Ting Yang Xianghua Wen 《Frontiers of Environmental Science & Engineering》2023,17(10):122
294.
微生物絮凝剂的现状与前景分析 总被引:26,自引:2,他引:26
综述了传统絮凝剂在水处理中存在的缺陷以及微生物絮凝剂在水处理中的优越性,对微生物絮凝剂可能在将来取代或部分取代传统的无机及有机高分子絮凝剂作了科学的分析,并针对现今微生物絮凝剂发展的不足指出了今后的发展趋势。 相似文献
295.
Molecular characterisation of the dissolved organic matter of wastewater effluents by MSSV pyrolysis GC-MS and search for source markers 总被引:3,自引:0,他引:3
Microscale sealed vessel pyrolysis (MSSVpy) was used to characterise the hydrophobic (HPO) and colloid (COL) fractions of dissolved organic matter (DOM) from the effluents (EFFs) of two waste water treatment plants (WWTPs) and several primary source waters (SWs). The EFFs showed a large range of anthropogenically sourced organics - including the metabolites of industrial chemicals (e.g., dioxanes, n- and sec-alkyl substituted benzenes and long chain alkyl phenols), pharmaceuticals (e.g., N- and S-heterocycles) and human waste (e.g., S- and N-organics, steranes/sterenes) - as well as high concentrations of alkyl aromatic and N-organic products (e.g., alkyl indoles, carbazoles and β-carbolines) attributed to the treatment biota. Some anthropogenic chemicals are potentially toxic at even trace levels, whilst the N-organics may be precursors for toxic N-disinfection by-products. Much lower concentrations of just a few of the anthropogenic and N-organic products were detected by more traditional flash pyrolysis (Flash-py) of the EFF samples, reflecting the higher sensitivity of MSSVpy to many chemical functionalities. Few of these products were detected in the corresponding MSSVpy analysis of the SWs, but these samples did show relatively high abundances of lignin (e.g., alkylphenols) and carbohydrate (e.g., furans) derived products. Their lower EFF abundances are consistent with efficient removal by the water treatment procedures applied. Conversely, the detection of the anthropogenics in the treated EFFs reflects their general resistance to treatment. Their occurrence in the HPO fractions isolated by XAD resin separation suggests a potential relationship with the structurally stable macromolecular fraction of the DOM. 相似文献
296.
Effects of petroleum contamination on soil microbial numbers, metabolic activity and urease activity 总被引:2,自引:0,他引:2
Guo H Yao J Cai M Qian Y Guo Y Richnow HH Blake RE Doni S Ceccanti B 《Chemosphere》2012,87(11):1273-1280
The influence of petroleum contamination on soil microbial activities was investigated in 13 soil samples from sites around an injection water well (Iw-1, 2, 3, 4) (total petroleum hydrocarbons (TPH): 7.5-78 mg kg−1), an oil production well (Op-1, 2, 3, 4, 5) (TPH: 149-1110 mg kg−1), and an oil spill accident well (Os-1, 2, 3, 4) (TPH: 4500-34 600 mg kg−1). The growth rate constant (μ) of glucose stimulated organisms, determined by microcalorimetry, was higher in Iw soil samples than in Op and Os samples. Total cultivable bacteria and fungi and urease activity also decreased with increasing concentration of TPH. Total heat produced demonstrated that TPH at concentrations less than about 1 g kg−1 soil stimulated anaerobic respiration. A positive correlation between TPH and soil organic matter (OM) and stimulation of fungi-bacteria-urease at low TPH doses suggested that TPH is bound to soil OM and slowly metabolized in Iw soils during OM consumption. These methods can be used to evaluate the potential of polluted soils to carry out self-bioremediation by metabolizing TPH. 相似文献
297.
Littlefield-Wyer JG Brooks P Katouli M 《Environmental pollution (Barking, Essex : 1987)》2008,153(2):393-400
We investigated changes in biomass, biochemical fingerprints, fatty acid methyl ester (FAME) profile and functional status of the natural aquatic microbial communities upon impact of an Atradex pulse. The Atradex was applied to microcosm tanks at concentrations ranging from 24.5microgL(-1) to 245mgL(-1). The biomass of all microbial communities declined to a minimum level on day 4 with the effect being more pronounced in treated groups. Similarity between microbial communities also decreased on day 4 with the greatest change occurring at a concentration of 245mgL(-1) Atradex. After 8 days exposure to Atradex, microbial communities in all treated groups (except tanks spiked with 245mgL(-1) Atradex) recovered and showed similar metabolic fingerprints and FAME profiles to those of controls. Our results indicate that exposure to an Atradex pulse at concentration above 245mgL(-1), may irreversibly change the structure and functional status of aquatic microbial communities. 相似文献
298.
Microbial and plant ecology of a long-term TNT-contaminated site 总被引:1,自引:0,他引:1
The contamination of the environment with explosive residues presents a serious ecological problem at sites across the world, with the highly toxic compound trinitrotoluene (TNT) the most widespread contaminant. This study examines the soil microbial community composition across a long-term TNT-contaminated site. It also investigates the extent of nitroaromatic contamination and its effect on vegetation. Concentrations of TNT and its metabolites varied across the site and this was observed to dramatically impact on the extent and diversity of the vegetation, with the most heavily contaminated area completely devoid of vegetation. Bryophytes were seen to be particularly sensitive to TNT contamination. The microbial population experienced both a reduction in culturable bacterial numbers and a shift in composition at the high concentrations of TNT. DGGE and community-level physiological profiling (CLPP) revealed a clear change in both the genetic and functional diversity of the soil when soil was contaminated with TNT. 相似文献
299.
中国微生物絮凝剂的生产研究现状 总被引:4,自引:2,他引:2
微生物絮凝剂具有降解性能好、应用广泛、成本低、操作简单及不会导致二次污染等优点,正日益引起人们的广泛重视.综述了微生物絮凝剂的开发研究状况,系统介绍了微生物絮凝剂的培养条件、产絮凝微生物生长的影响因素以及中国目前利用废水生产微生物絮凝剂的现状,并指出了微生物絮凝剂生产的现存问题和发展方向. 相似文献
300.