全文获取类型
收费全文 | 384篇 |
免费 | 19篇 |
国内免费 | 137篇 |
专业分类
安全科学 | 23篇 |
废物处理 | 26篇 |
环保管理 | 30篇 |
综合类 | 185篇 |
基础理论 | 81篇 |
污染及防治 | 137篇 |
评价与监测 | 19篇 |
社会与环境 | 19篇 |
灾害及防治 | 20篇 |
出版年
2024年 | 1篇 |
2023年 | 8篇 |
2022年 | 23篇 |
2021年 | 20篇 |
2020年 | 18篇 |
2019年 | 21篇 |
2018年 | 24篇 |
2017年 | 13篇 |
2016年 | 16篇 |
2015年 | 24篇 |
2014年 | 43篇 |
2013年 | 43篇 |
2012年 | 19篇 |
2011年 | 42篇 |
2010年 | 16篇 |
2009年 | 26篇 |
2008年 | 21篇 |
2007年 | 23篇 |
2006年 | 28篇 |
2005年 | 24篇 |
2004年 | 7篇 |
2003年 | 13篇 |
2002年 | 9篇 |
2001年 | 8篇 |
2000年 | 9篇 |
1999年 | 5篇 |
1998年 | 4篇 |
1997年 | 9篇 |
1996年 | 6篇 |
1995年 | 4篇 |
1994年 | 3篇 |
1993年 | 3篇 |
1992年 | 2篇 |
1991年 | 1篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1988年 | 1篇 |
排序方式: 共有540条查询结果,搜索用时 15 毫秒
61.
Ma Huimin Di Danyang Li Lin Zhang Wei Wang Jianmei 《Environmental geochemistry and health》2022,44(9):2905-2918
Environmental Geochemistry and Health - Effective supply of environmental public services (EPS) is important to guarantee the mitigation of residential pollution exposure risk. This study analyzes... 相似文献
62.
63.
A major, often unrecognized variable regulating plant growth in semi-closed environment is air contaminant. The vapor of propylene glycol (PG), which was used as coolant in growth chambers, has been found to be toxic to corn (Zea mays L.) and soybean (Glycine max L.) plants. PG solution leaked from a valve packing system and volatilized to vapor, which was trapped in a semi-closed growth chamber. Symptoms of leaf edge chlorosis, later developing into necrosis, were observed on the third day of emergence or on the third day after moving healthy plants into the chamber. For young soybean plants, symptoms were slightly different from those observed in corn plants; the chlorosis symptoms were not uniformly distributed on all leaves. Some soybean leaves curled up and others had white spots. This problem was identified by using a portable photoionization detector to obtain instantaneous readings of total volatile organic compound concentrations inside the chambers. The presence of PG in selected chambers was verified using sample collection with solid phase microextraction (SPME) followed by analysis with multi-dimensional gas chromatography mass spectrometry (MD-GC-MS). This information is pertinent to researchers who use controlled environment to grow plants. 相似文献
64.
65.
介绍了侧联式球磨机噪声产生原理及其噪声控制方法,选择了制作局部式隔声罩的噪声控制设计和装置结构.在中国铝业中州分公司热电厂球磨机上应用,取得了很好的隔声效果. 相似文献
66.
东京根霉对重金属Cr^3+、Mn^2+和Zn^2+的吸附研究 总被引:5,自引:0,他引:5
张建梅 《环境污染治理技术与设备》2006,7(8):64-68
利用固定化发酵中产生的废菌体——东京根霉(Rhizopustonkinesis)去除废水中Cr^3+、Mn^2+和Zn^2+,研究了预处理、pH、温度、金属离子初始浓度、吸附时间等条件对吸附量的影响。结果表明,用NaOH浸泡4—6h、在pH=5—6,温度25-35℃时吸附效果最好,用Langmuir、Freundlich和Temkin方程对其吸附等温线进行拟合,相关性都比较好;用不同的吸附动力学方程描述东京根霉吸附金属离子的最优和最次模型分别为Elovich方程和一级扩散方程,双常数方程和抛物线扩散方程拟合介于前二者之间。 相似文献
67.
The characteristics of dissolved organic matter (DOM) and bromide ion concentration have a significant influence on the formation of disinfection by-products (DBPs). In order to identify the main DBP precursors, DOM was divided into five fractions based on molecular weight (MW), trihalomethane formation potential and haloacetic acid formation potential were determined for fractions, and the change in contents of different fractions and total DBPs during treatment processes (pre-chlorination, coagulation, sand filtration, disinfection) were studied. Moreover, the relationship between bromide concentration and DBP generation characteristics in processes was also analyzed. The results showed that the main DBP precursors were the fraction with MW < 1 kDa and fraction with MW 3−10 kDa, and the DBP''s generation ability of lower molecular weight DOM (< 10 kDa) was higher than that of higher molecular weight DOM. During different processes, pre-chlorination and disinfection had limited effect on removing organics but could alter the MW distribution, and coagulation and filtration could effectively remove organics with higher MW. For DBPs, trihalomethanes (THMs) were mainly generated in pre-chlorination and disinfection, while haloacetic acids (HAAs) were mostly generated during pre-chlorination; coagulation and sand filtration had little effect on THMs but resulted in a slight removal of HAAs. In addition, the results of ANOVA tests suggested that molecular sizes and treatment processes have significant influence on DBP formation. With increasing bromide concentration, the brominated DBPs significantly increased, but the bromine incorporation factor in the processes was basically consistent at each concentration. 相似文献
68.
69.
Xinye Wang Yaji Huang Miaomiao Niu Yongxing Wang Changqi Liu 《Journal of Material Cycles and Waste Management》2016,18(2):287-295
The thermodynamic equilibrium of trace lead during the waste incineration was calculated on the basis of the minimization of the total Gibbs energy. The effect of incineration condition and MSW components on Pb distribution was investigated mainly in the view of the interaction of related elements. In the oxygen-rich condition, incineration temperature affects Pb distribution by the interaction of Cl, Ca and Na. In the fuel-rich condition, incineration temperature affects Pb distribution directly by the thermal transition of PbS(s) to PbCl(g) and the thermal transition of PbCl(g) to Pb(g). Air ratio has significant effect on Pb distribution by the interaction of H, O and Cl. The liberated Cl in oxidizing condition is far less than that in reducing condition. Na has the top priority to bond with Cl, than Ca only at low temperature and H only at high temperature, so the effect of Cl on Pb distribution depends on the content of Na and Ca. S promotes Pb volatilization by the interaction with Na in oxygen-rich and chlorine-poor condition and depresses Pb volatilization by the formation of PbS(s) directly without interaction with other elements in fuel-rich condition. 相似文献
70.