全文获取类型
收费全文 | 73篇 |
免费 | 1篇 |
国内免费 | 26篇 |
专业分类
安全科学 | 4篇 |
废物处理 | 4篇 |
环保管理 | 6篇 |
综合类 | 40篇 |
基础理论 | 13篇 |
污染及防治 | 29篇 |
评价与监测 | 2篇 |
社会与环境 | 2篇 |
出版年
2022年 | 3篇 |
2021年 | 1篇 |
2020年 | 2篇 |
2019年 | 5篇 |
2018年 | 3篇 |
2017年 | 4篇 |
2016年 | 6篇 |
2015年 | 4篇 |
2014年 | 3篇 |
2013年 | 7篇 |
2012年 | 15篇 |
2011年 | 9篇 |
2010年 | 4篇 |
2009年 | 3篇 |
2008年 | 6篇 |
2007年 | 5篇 |
2006年 | 2篇 |
2005年 | 1篇 |
2003年 | 3篇 |
2001年 | 1篇 |
2000年 | 2篇 |
1998年 | 4篇 |
1997年 | 4篇 |
1996年 | 1篇 |
1991年 | 1篇 |
1979年 | 1篇 |
排序方式: 共有100条查询结果,搜索用时 227 毫秒
51.
52.
53.
Wang Yaya Zang Bing Liu Yu Li Guoxue 《Journal of Material Cycles and Waste Management》2018,20(1):461-468
Journal of Material Cycles and Waste Management - The KW from Chaoyang District was mainly treated by incineration at present. The main purpose of this study was to analysis whether the properties... 相似文献
54.
Chen YW Wang JM Zang CL Huang Q Liu MQ Zhu SM Shen SB 《Water environment research》2012,84(2):128-133
In this study, a cascade of anoxic and oxic fluidized bed biofilm reactors system was carried out to treat synthetic municipal wastewater. The parameters of the influent flow rates and C/N ratios were discussed. System performance was acceptable for chemical oxygen demand (COD), ammonia, and total nitrogen removal. A decrease of ammonia and total nitrogen removal efficiencies, however, was observed when the influent flow rates increased to 5.04 and 6.12 1 h(-1). Total nitrogen removal decreased at the influent C/N ratio of 3:1. The measured ratios of COD reduction in the anoxic column to nitrogen removal through nitrification-denitrification were 3.7, 3.5, 3.3, and 3.1 g COD/g(-1) N on average when the influent C/N ratios changed from 6:1 to 3:1. The observed sludge yield (Yobs) was 0.169 g VSS g COD(-1) because of perfect denitrification in the anoxic column and the relatively long solids retention time. 相似文献
55.
以调查问卷的统计结果为参考,运用定性分析和定量分析两种方法,结合学生在学习过程中存在的课程内容繁杂、识记困难等问题,从课程的特点和高职学生的特征出发,提出课程在教学过程中可通过就业驱动、多媒体手段、现场展示、案例分析、校外实践、网络化教学等方法来提高学生的学习兴趣和应用能力。 相似文献
56.
Airborne concentrations of PAH in the vicinity of the source region with open‐air burning of metal scraps were measured between February, 1992 and November, 1993. The activity of open‐air burning decreased significantly since 1993 due to prohibition regulation. Both gaseous phase and particle‐bound PAH were measured at five sampling sites, which included one reference sampling site far away from the source region. Both values of gaseous and particle‐bound PAH concentrations, which were measured in the vicinity of source region, decreased clearly during the two years monitoring period. It shows that the uncontrolled open‐air burning of metal scraps was a significant emission source of airborne PAH in the study area. The profiles of various species of PAH were also compared. A large decrease in benzo(a)pyrene was observed in the source region. 相似文献
57.
生态文明是以人与自然协调发展为核心的观念。旅游业可持续发展中面临着“旅游景区”开发过程中的盲目性、生态旅游发展过程中的盲目性、文物古迹修缮过程中的盲目性,以及国民生态意识淡薄、旅游行为非生态化等问题。构建生态文明的旅游观,是旅游业摆脱困境,实现可持续发展的根本保证。 相似文献
58.
连环湖阿木塔泡沉积物中重金属形态及其对环境影响分析 总被引:3,自引:0,他引:3
采用了BCR三步提取法,对连环湖阿木塔泡AMT岩芯沉积物中的Mn、Cr、Cu、Fe、Ni、Pb和Zn等7种重金属元素的化学形态进行了分析。结果表明:Cr、Cu、Fe、Ni、Pb、zn元素以残渣态为主,Mn元素以可交换态及碳酸盐结合态为主。Cr、Cu、Ni、Pb的有机物及硫化物结合态、Fe—Mn氧化物结合态含量较高,Zn的有机物及硫化物含量较高。其中,Mn、Cr、Ni和Pb对环境产生危害的可能性最大,对这几元素应该予以足够的关注。 相似文献
59.
Mutagenicity of surface water in Lake Taihu was monitored by genotoxicological methods. The goal is to determine the situation concerning the contamination by mutagens, their distribution in the lake, and the potential effect on public health. In this study, the micronucleus test of Vicia faba root tip, a standard monitoring technique now in China, was carried out to make a preliminary screening of environmental mutagens in 39 representative sites of the lake. Highly significant differences in MCN permillage (average number of micronuclei per 1000 cells) and PI (pollution index) values were found among these sites. From the results, a rough distribution of the contamination could be obtained: mainly concentrated in the north-west area of the lake from several tributaries flowing into the lake. In order to provide further evidence, organic extracts from four entrances and one outlet of the five major tributaries were examined by the micronucleus test of human peripheral lymphocytes. The results were in accord with those of the micronucleus tests using Vicia faba. The tests also revealed that the intensity and mechanism of the pollutants were diverse in the different sources. 相似文献
60.