全文获取类型
收费全文 | 368篇 |
免费 | 17篇 |
国内免费 | 101篇 |
专业分类
安全科学 | 18篇 |
废物处理 | 27篇 |
环保管理 | 50篇 |
综合类 | 191篇 |
基础理论 | 62篇 |
污染及防治 | 91篇 |
评价与监测 | 15篇 |
社会与环境 | 11篇 |
灾害及防治 | 21篇 |
出版年
2023年 | 4篇 |
2022年 | 22篇 |
2021年 | 13篇 |
2020年 | 20篇 |
2019年 | 11篇 |
2018年 | 15篇 |
2017年 | 14篇 |
2016年 | 26篇 |
2015年 | 20篇 |
2014年 | 28篇 |
2013年 | 36篇 |
2012年 | 29篇 |
2011年 | 41篇 |
2010年 | 29篇 |
2009年 | 21篇 |
2008年 | 26篇 |
2007年 | 23篇 |
2006年 | 15篇 |
2005年 | 12篇 |
2004年 | 7篇 |
2003年 | 10篇 |
2002年 | 8篇 |
2001年 | 11篇 |
2000年 | 11篇 |
1999年 | 9篇 |
1998年 | 3篇 |
1997年 | 5篇 |
1996年 | 6篇 |
1995年 | 4篇 |
1993年 | 5篇 |
1990年 | 2篇 |
排序方式: 共有486条查询结果,搜索用时 15 毫秒
101.
102.
Yong Geng Wan-xia Ren Bing Xue Tsuyoshi Fujita Feng-ming Xi Ye Liu Mei-ling Wang 《Journal of Material Cycles and Waste Management》2013,15(3):310-320
Medical waste management is of great importance due to its potential environmental and public health risks, especially in developing countries where both financial and technological resources on medical waste management are still lacking. Although many studies have focused on country-scaled medical waste management, few have paid close attention to regional (city-scale) management, particularly in China. This paper fills such a gap by employing a case study approach. Due to its representative nature, Shenyang was selected as the case study. After a review of China’s medical waste management, an empirical study in Shenyang was conducted in order to analyze the current state as well as identify key challenges on regional medical waste management. Based upon the local realities and aiming to better manage medical wastes, an integrated medical waste management framework is developed. Such a platform encourages the establishment of a specific medical waste management authority, a city scaled capacity building program on improving the general public’s awareness, an information platform, application of state-of-the-art technologies, as well as creation of an effective financial system. The combination of such initiatives can significantly improve the overall eco-efficiency of medical waste management at the regional level and should be promoted to other developing cities. 相似文献
103.
混凝法去除城市生活污水中抗性基因 总被引:2,自引:0,他引:2
采用聚合氯化铝(PACl)和聚合硫酸铁(PFS)混凝处理城市生活污水(格栅出水和二级出水),考察混凝剂投加量、pH值对污水中抗生素抗性基因(ARGs)的去除率影响。结果表明,随着PACl和PFS投加量的增加,污水中目标基因的去除率先升高后降低;在pH 3~10的范围内,PACl对目标基因的去除效果随pH值的增加而降低,PFS对目标基因的去除随着pH值的增加先升高后降低。对于格栅出水,PACl和PFS的最佳投加量为400 mg/L,基因的去除率分别达到2.33~2.97 log和0.98~2.11 log,对于二级出水,PACl和PFS的最佳投加量分别为200 mg/L和150 mg/L,基因的去除率分别为1.85~2.64 log、1.81~2.46 log;混凝去除最优pH条件分别为pH=3(投加PACl)及pH=5~6(投加PFS)。PACl的处理效果优于PFS。 相似文献
104.
在经典的DEA模型的基础上进行了修正,采用四阶段DEA模型,旨在剔除环境控制变量对效率测度结果的影响.同时,在DEA模型的基础上引入Malmquist指数分析法,以弥补DEA模型无法测度面板数据的缺陷.选取了2012年-2014年A股节能环保上市公司的面板数据,测度了样本的融资效率及三年的融资效率变化情况,结果表明:资源循环利用行业的融资效率最高,其次是环保行业,融资效率最低的是节能行业.样本企业总体的融资效率每年都在增长,但增长速度开始放缓. 相似文献
105.
106.
概括了邳州近三年环境信访的基本情况,并对其特点和原因进行了分析,探讨了做好邳州环境信访工作的措施和几点建议. 相似文献
107.
Kangwei Li Chao Lin Chunmei Geng Stephen White Linghong Chen Zhier Bao Xin Zhang Yanyun Zhao Lixia Han Wen Yang Merched Azzi 《环境科学学报(英文版)》2020,32(9):14-22
A new state-of-the-art indoor smog chamber facility(CAPS-ZJU) has been constructed and characterized at Zhejiang University,which is designed for chemical mechanism evaluation under well-controlled conditions.A series of characterization experiments were performed to validate the well-established experimental protocols,including temperature variation pattern,light spectrum and equivalent intensity(JNO2),injection and mixing performance,as well as gases and particle wall loss.In additi... 相似文献
108.
The current state of concentrations of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) in China is presented. While products that are known to degrade to either PFOS or PFOA have been used in China, concentrations in environmental media have been reported to be relatively low across China. Greater concentrations of PFOS and PFOA were observed in southern and eastern China than in other areas of China. Concentrations of PFOS and PFOA were relatively great in the Huangpu River, with concentrations of 20.5 ng l?1 and 1590 ng l?1, respectively. Surface waters of Dongguan and Shanghai were more contaminated by PFOS and PFOA than that of other cities. Dongguan was the only city in China in which PFOS value in surface water exceeded the water quality criterion, while PFOA concentration in Shanghai was 152 ng l?1. Similar to other contaminants, point-source pollution was also the common pattern of PFOS and PFOA contamination. Concentrations of PFOS in human blood in China were relatively greater in China than other countries, with drinking water contamination given as the most likely source. Concentrations of PFOS in human blood have increased from the 1980s to the 2000s, while such a trend was not observed for PFOA. 相似文献
109.
Mahsa Kheirandish Chunjiang An Zhi Chen Xiaolong Geng Michel Boufadel 《Frontiers of Environmental Science & Engineering》2022,16(5):61
110.