全文获取类型
收费全文 | 10388篇 |
免费 | 160篇 |
国内免费 | 1378篇 |
专业分类
安全科学 | 347篇 |
废物处理 | 487篇 |
环保管理 | 864篇 |
综合类 | 2839篇 |
基础理论 | 2067篇 |
环境理论 | 4篇 |
污染及防治 | 3147篇 |
评价与监测 | 690篇 |
社会与环境 | 1291篇 |
灾害及防治 | 190篇 |
出版年
2023年 | 84篇 |
2022年 | 248篇 |
2021年 | 212篇 |
2020年 | 135篇 |
2019年 | 144篇 |
2018年 | 267篇 |
2017年 | 301篇 |
2016年 | 333篇 |
2015年 | 319篇 |
2014年 | 523篇 |
2013年 | 902篇 |
2012年 | 572篇 |
2011年 | 593篇 |
2010年 | 464篇 |
2009年 | 537篇 |
2008年 | 582篇 |
2007年 | 573篇 |
2006年 | 488篇 |
2005年 | 417篇 |
2004年 | 361篇 |
2003年 | 369篇 |
2002年 | 339篇 |
2001年 | 356篇 |
2000年 | 319篇 |
1999年 | 220篇 |
1998年 | 208篇 |
1997年 | 158篇 |
1996年 | 138篇 |
1995年 | 155篇 |
1994年 | 125篇 |
1993年 | 111篇 |
1992年 | 105篇 |
1991年 | 74篇 |
1990年 | 90篇 |
1989年 | 65篇 |
1988年 | 54篇 |
1987年 | 43篇 |
1986年 | 52篇 |
1985年 | 48篇 |
1984年 | 53篇 |
1983年 | 38篇 |
1982年 | 48篇 |
1981年 | 43篇 |
1980年 | 44篇 |
1979年 | 46篇 |
1977年 | 32篇 |
1973年 | 33篇 |
1972年 | 40篇 |
1971年 | 32篇 |
1969年 | 31篇 |
排序方式: 共有10000条查询结果,搜索用时 375 毫秒
1.
Wang Chunbo Cai Qijia Li Yang Tian Cuicui Wu Xingqiang Huang Yuhong Xiao Bangding 《Environmental science and pollution research international》2021,28(31):42082-42092
Environmental Science and Pollution Research - A mechanical harvesting technology based on coupling flocculation with a rotary drum filter (RDF, 35-μm) was applied to remove cyanobacterial... 相似文献
2.
Petrov I. A. Shushpanov A. S. Golyukov A. S. Dvinskaya M. L. Kharuk V. I. 《Russian Journal of Ecology》2021,52(5):399-405
Russian Journal of Ecology - Climate change entails shifts in the ranges of woody plants along both latitudinal and altitudinal gradients in the boreal forest biome. In this study,... 相似文献
3.
Huang Ying Jiang Qiongji Yu Xubiao Gan Huihui Zhu Xia Fan Siyi Su Yan Xu Zhirui He Cunrui 《Environmental science and pollution research international》2021,28(37):51251-51264
Environmental Science and Pollution Research - Trace copper ion (Cu(II)) in water and wastewater can trigger peroxymonosulfate (PMS) activation to oxidize organic compounds, but it only works under... 相似文献
4.
Li Haoxin Huang Yuyan Yang Xiaojie Jiang Zhengwu Yang Zhenghong 《Journal of Material Cycles and Waste Management》2018,20(3):1701-1709
Journal of Material Cycles and Waste Management - This work aims to develop another approach to the management of magnesium slag (MS) via the production of Portland cement clinker. Thus, 0, 10, 20,... 相似文献
5.
采用大肠杆菌吸附-化学还原法,以大肠杆菌(ECCs)为模板、十六烷基三甲基溴化铵为保护剂、抗坏血酸为还原剂,由废含金催化剂制备金纳米线(AuNWs)。采用XRD,SEM,TEM等技术对AuNWs进行表征。研究了AuNWs对罗丹明6G(R6G)和4-巯基苯甲酸(4-MBA)的拉曼散射信号的增强效果。实验结果表明:在制备过程中加入微生物ECCs,可使金回收率提高约20百分点;当溶液pH小于4时,反应2 h后,有大量呈线状的AuNWs聚集沉降,金回收率可达99%1以上。表征结果显示,AuNWs呈多晶结构,晶格间距为0.23 nm。表面增强拉曼散射分析表明,AuNWs对R6G和4-MBA具有良好的拉曼光谱增强性能。 相似文献
6.
7.
Estimating Remediation and Contaminant Respiration Emissions for Alternatives Comparisons at Petroleum Spill Sites 下载免费PDF全文
Greenhouse gas emissions assessments for site cleanups typically quantify emissions associated with remediation and not those from contaminant biodegradation. Yet, at petroleum spill sites, these emissions can be significant, and some remedial actions can decrease this additional component of the environmental footprint. This article demonstrates an emissions assessment for a hypothetical site, using the following technologies as examples: excavation with disposal to a landfill, light nonaqueous‐phase liquid (LNAPL) recovery with and without recovered product recycling, passive bioventing, and monitored natural attenuation (MNA). While the emissions associated with remediation for LNAPL recovery are greater than the other considered alternatives, this technology is comparable to excavation when a credit associated with product recycling is counted. Passive bioventing, a green remedial alternative, has greater remedial emissions than MNA, but unlike MNA can decrease contaminant‐related emissions by converting subsurface methane to carbon dioxide. For the presented example, passive bioventing has the lowest total emissions of all technologies considered. This illustrates the value in estimating both remediation and contaminant respiration emissions for petroleum spill sites, so that the benefit of green remedial approaches can be quantified at the remedial alternatives selection stage rather than simply as best management practices. ©2015 Wiley Periodicals, Inc. 相似文献
8.
通过实验考察了酸性条件下纳米铁催化分解高氯酸盐过程中的影响因素,对其分解的动力学进行了研究,并对纳米铁催化剂结构及微观形貌进行SEM、EDS和XRD表征分析。利用阿仑尼乌斯方程和幂指数方程拟合反应动力学方程,获得了高氯酸盐分解动力学方程Ct=C0exp{-0.03773exp(-201.65/T)[H]0.191t},理论的计算值与实验值吻合较好,误差在15%以内。 相似文献
9.
V. Vijayasree Hebsy Bai S. Naseema Beevi Thomas Biju Mathew Thomas George George Xavier 《Environmental monitoring and assessment》2015,187(5):299
Dissipation and decontamination of chlorantraniliprole (Coragen 18.5 SC) in brinjal and okra fruits were studied following field application at single and double doses of 30 and 60 g ai ha?1, and the residues of the insecticide was estimated using LC-MS/MS. Initial residues of chlorantraniliprole at single and double doses on the fruits of brinjal were 0.72 and 1.48 mg kg?1, while on okra fruits, the residues were 0.48 and 0.91 mg kg?1, respectively. The residues reached below detectable level of 0.01 mg kg?1 on the 10th day. Half-life of chlorantraniliprole at 30 and 60 g ai ha?1 on brinjal was 1.58 and 1.80 days with the calculated waiting period of 0.69 and 2.38 days, whereas on okra, the values were 1.60 and 1.70 and 0 and 1.20 days, respectively. The extent of removal of chlorantraniliprole using simple decontaminating techniques at 2 h and 3 days after spraying was 40.99–91.37 % and 29.85–89.12 %, respectively, from brinjal fruits and 47.78–86.10 % and 41.77–86.48 %, respectively, from okra fruits. 相似文献
10.
The effects of Cu2+, Cd2+, and Ni2+ at low and high concentrations (0.025 and 0.25 mg/ml) on the accumulation capacity, the state of the pigment complex, and photosynthesis rate have been studied in model experiments with three floating hydrophytes (Hydrocharis morsus-ranae L., Lemna gibba L., and Potamogeton natans L.) and four submerged hydrophytes (Elodea canadensis Michx., Lemna trisulka L., Ceratophyllum demersum L., and Potamogeton lucens L.). Copper and cadmium are especially toxic at the concentrations studied. The effect of Cu2+ was the strongest in hydatophytes, and the effect of Cd2+, in pleustophytes. It is hypothesized that the differences between hydrophytes with respect to accumulation of metals and decrease in photosynthesis rate may cause predominant elimination of submerged species. Therefore, changes in the species structure of hydrophyte communities may be expected in waters polluted with metals. 相似文献