全文获取类型
收费全文 | 305篇 |
免费 | 4篇 |
国内免费 | 23篇 |
专业分类
安全科学 | 11篇 |
废物处理 | 71篇 |
环保管理 | 69篇 |
综合类 | 98篇 |
基础理论 | 8篇 |
污染及防治 | 42篇 |
评价与监测 | 28篇 |
社会与环境 | 3篇 |
灾害及防治 | 2篇 |
出版年
2023年 | 4篇 |
2022年 | 4篇 |
2021年 | 6篇 |
2020年 | 10篇 |
2019年 | 2篇 |
2018年 | 4篇 |
2017年 | 8篇 |
2016年 | 8篇 |
2015年 | 7篇 |
2014年 | 38篇 |
2013年 | 22篇 |
2012年 | 13篇 |
2011年 | 10篇 |
2010年 | 6篇 |
2009年 | 8篇 |
2008年 | 15篇 |
2007年 | 26篇 |
2006年 | 19篇 |
2005年 | 18篇 |
2004年 | 16篇 |
2003年 | 16篇 |
2002年 | 11篇 |
2001年 | 13篇 |
2000年 | 7篇 |
1999年 | 10篇 |
1998年 | 9篇 |
1997年 | 2篇 |
1996年 | 2篇 |
1995年 | 3篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1989年 | 2篇 |
1988年 | 1篇 |
1987年 | 3篇 |
1982年 | 1篇 |
1978年 | 1篇 |
排序方式: 共有332条查询结果,搜索用时 62 毫秒
61.
Characterization and control of odorous gases at a landfill site: a case study in Hangzhou, China 总被引:4,自引:0,他引:4
Ying D Chuanyu C Bin H Yueen X Xuejuan Z Yingxu C Weixiang W 《Waste management (New York, N.Y.)》2012,32(2):317-326
Municipal solid waste (MSW) landfills are one of the major sources of offensive odors potentially creating annoyance in adjacent communities. At the end of May 2007, an odor pollution incident occurred at the Tianziling landfill site, Hangzhou, China, where the residents lodged complaints about the intense odor from the landfill, which drew a significant attention from the government. In this study, ambient air monitoring was conducted at the Tianziling landfill site. The main odor composition of the gas samples collected on June 1st 2007 and the reduction of various odorous gases from the samples collected on June 1st 2009 due to the applied odor control techniques were determined using gas chromatography-mass spectrometry (GC-MS). In addition, variations of primary odorous gaseous (NH3 and H2S) concentrations at different locations in the landfill site from July 2007 to June 2009 were also investigated by using classical spectrophotometric methods. Results showed that a total of 68 volatile compounds were identified among which H2S (56.58-579.84 μg/m3) and NH3 (520-4460 μg/m3) were the notable odor components contributing to 4.47-10.92% and 83.91-93.94% of total concentrations, respectively. Similar spatial and temporal shifts of H2S and NH3 concentrations were observed and were significantly affected by environmental factors including temperature, air pressure and wind direction. Odor pollution was worse when high temperature, high humidity, low air pressure, and southeast, northeast or east wind appeared. Moreover, the environmental sampling points of the dumping area and the leachate treatment plant were found to be the main odor sources at the Tianziling landfill site. The odor control technologies used in this project had a good mitigating effect on the primary odorous compounds. This study provides long-term valuable information concerning the characteristics and control of odors at landfill sites in a long run. 相似文献
62.
63.
64.
65.
北京某垃圾填埋区空气细菌浓度及粒径分布特征 总被引:3,自引:0,他引:3
以北京市某垃圾填埋区中作业区和覆盖区的空气细菌为主要研究对象,研究四个季节空气细菌浓度及粒径分布特征,得出了以下结论:垃圾填埋区作业区空气细菌浓度四季变化特征较覆盖区显著,且空气细菌浓度高于覆盖区。垃圾填埋区作业区和覆盖区四季的空气细菌粒子主要分布在前4级中,且在第Ⅵ级(<1.0μm)中分布比例最小,但分布规律不完全相同。秋季作业区最易感染人体的空气细菌浓度最高。垃圾填埋区作业区和覆盖区空气细菌中值直径最小值均出现在夏季,最大值均出现在冬季。 相似文献
66.
Variations in the chemical properties of landfill leachate 总被引:4,自引:0,他引:4
Landfill leachates were collected and their chemical properties analyzed once every two months over a ten-month period from
the Gin Drinkers' Bay (GDB) and Junk Bay (JB) landfills. The contents of solids, and inorganic and organic components fluctuated
considerably with time. In general, the chemical properties of the two leachates correlated negatively (P<0.05) with the amounts of rainfall prior to the sampling periods. However, magnesium and pH of the leachates remained relatively
constant with respect to sampling time. The JB leachate contained higher average contents of solids and inorganic and organic
matter than those of GDB with the exception of trace metals. Trace metals were present in the two leachates in trace quantities
(<1.0 mg/liter). The concentrations of average ammoniacal nitrogen were 1040 and 549 mg/liter, while chemical oxygen demand
(COD) values were 767 and 695 mg/liter for JB and GDB leachates, respectively. These results suggest that the leachates need
further treatment before they can be discharged to the coastal waters. 相似文献
67.
Charles R. Malone 《Environmental management》1990,14(1):25-32
The US Department of Energy (DOE) plans to conduct site characterization studies at Yucca Mountain, Nevada, to determine if
the location is a suitable site for a nuclear waste repository. In lieu of traditional environmental review in accordance
with the National Environmental Policy Act of 1969, the DOE is relying on an environmental assessment (EA) mandated by the
Nuclear Waste Policy Act of 1982 as the cornerstone of its environmental program for the Yucca Mountain Project. Because of
statutory restrictions, the EA is not based on comprehensive baseline information. Neither does it address fundamentals of
environmental analysis such as ecological integrity and assessment of cumulative impacts. Consequently, the present environmental
program for Yucca Mountain reflects decisions made without complete information and integrated environmental review. The shortcomings
of the program risk compromising the natural integrity of Yucca Mountain and invalidating future assessment of the ability
of a nuclear waste repository located at the site to protect the environment. Significant improvements are needed in the repository
siting program before it can serve as a model of how society can evaluate the long-term environmental consequences of advanced
technologies, as has been suggested. 相似文献
68.
陈垃圾特性分析及其适用性评价 总被引:5,自引:0,他引:5
对深圳市盐田区垃圾场处置工程陈垃圾特性进行了分析,结果表明,场内陈垃圾已基本腐熟,相对附近农田土壤,陈垃圾中的营养物质较高,接近但尚未完全达到农用垃圾肥标准,且铅含量超标2~3 倍,不宜进入食物链。但陈垃圾可用作市区绿化地带、公园、苗圃、林业等处的有机肥和垃圾填埋场封场工程的表层营养土 相似文献
69.
70.