全文获取类型
收费全文 | 356篇 |
免费 | 20篇 |
国内免费 | 127篇 |
专业分类
安全科学 | 99篇 |
废物处理 | 7篇 |
环保管理 | 27篇 |
综合类 | 191篇 |
基础理论 | 59篇 |
污染及防治 | 69篇 |
评价与监测 | 16篇 |
社会与环境 | 18篇 |
灾害及防治 | 17篇 |
出版年
2024年 | 14篇 |
2023年 | 25篇 |
2022年 | 24篇 |
2021年 | 12篇 |
2020年 | 6篇 |
2019年 | 8篇 |
2018年 | 17篇 |
2017年 | 13篇 |
2016年 | 10篇 |
2015年 | 22篇 |
2014年 | 20篇 |
2013年 | 12篇 |
2012年 | 40篇 |
2011年 | 44篇 |
2010年 | 16篇 |
2009年 | 24篇 |
2008年 | 26篇 |
2007年 | 28篇 |
2006年 | 27篇 |
2005年 | 18篇 |
2004年 | 8篇 |
2003年 | 14篇 |
2002年 | 10篇 |
2001年 | 11篇 |
2000年 | 2篇 |
1999年 | 9篇 |
1998年 | 6篇 |
1997年 | 6篇 |
1996年 | 2篇 |
1995年 | 4篇 |
1994年 | 4篇 |
1993年 | 3篇 |
1992年 | 1篇 |
1991年 | 3篇 |
1990年 | 1篇 |
1989年 | 4篇 |
1988年 | 2篇 |
1987年 | 1篇 |
1986年 | 4篇 |
1985年 | 1篇 |
1984年 | 1篇 |
排序方式: 共有503条查询结果,搜索用时 46 毫秒
121.
介绍了乐昌铅锌矿通风安全管理的成功经验.该矿南采区进回风巷道长,通风困难,风量不足,空气很差,通过矿领导和工程技术人员的实地考察、准确计算、技术经济分析、方案比较,采用在南采区回风巷中安装辅助通风机的方式,成功地解决了南采区的通风困难问题. 相似文献
122.
化学工业园区重大事故场外应急预案编制技术研究 总被引:1,自引:0,他引:1
阐述化学工业园区重大事故场外应急预案编制的技术路线;把编制过程分为调查评估、制度设计、预案编写3阶段,其中调查评估是基础,制度设计是关键;指出危险源辨识、脆弱性分析、应急资源评估、应急组织架构及其职责确定、应急救援运行机制设计等是化学工业园区重大事故场外应急预案编制的工作要点;提出"基本预案+应急功能程序+支持附件"的化学工业园区重大事故场外应急预案结构模式。该编制技术对促进化学工业园区重大事故场外应急预案的科学化、规范化和可操作性具有指导意义。 相似文献
123.
Haoji Wang Yue Su Yangzheng Liu Fei Xie Xingjun Zhou Ruihong Yu Changwei Lü Jiang He 《环境科学学报(英文版)》2024,(4):74-87
As a vital type of light-absorbing aerosol, brown carbon(BrC) presents inherent associations with atmospheric photochemistry and climate change. However, the understanding of the chemical and optical properties of BrC is limited, especially in some resource-dependent cities with long heating periods in northwest China. This study showed that the annual average abundances of Water-soluble BrC(WS-BrC) were 9.33±7.42 and 8.69±6.29 μg/m3in Baotou and Wuhai and the concentrations, absorpti... 相似文献
124.
Gao B Liu WB Jia LY Xu L Xie J 《Journal of environmental science and health. Part. B》2011,46(3):257-263
In this study, an Alcaligenes sp. strain DG-5 that can effectively degrade dichlorodiphenyltrichloro-ethanes (DDTs) under aerobic conditions was isolated from DDTs-contaminated sediment. Various factors that affect the biodegradation of DDTs by DG-5 were investigated. About 88 %, 65 % and 45 % of the total DDTs were consumed within 120 h when their initial concentrations were 0.5, 5 and 15 mg L?1, respectively. However, almost no degradation was observed when their concentration was increased to 30 mg L?1, but the addition of nutrients significantly improved the degradation, and 66 % and 90 % of the total DDTs were degraded at 336 h in the presence of 5 g L?1 peptone and yeast extract, respectively. Moreover, the addition of 20 mM formate also enhanced the ability of DG-5 to transform DDTs, and its DDT transformation capacity (T(c)) value was increased by 1.8 - 2.7 fold for the pure (p,p'-DDT or o,p'-DDT only) and mixed systems (p,p'-DDT, o,p'-DDT, p,p'-DDD and p,p'-DDE). Furthermore, it was found that competitive inhibition in the biodegradation by DDT compounds occurred in the mixed system. 相似文献
125.
Xie X Zhou Q Lin D Guo J Bao Y 《Environmental science and pollution research international》2011,18(4):566-575
Introduction
More attention has been paid to tetracycline contamination in view of its rapid increasing concentration in the environment. Therefore, it is important to set up rapid, simple, and accurate methods for monitoring tetracycline ecotoxicity. 相似文献126.
A pilot biotrickling filter (BTF) packed with ZX02 fibrous balls as packing material was tested for the treatment of ammonia (NH3) released from a composting plant of dairy manure. In order to investigate the effects of three compost aeration modes (mode Co-I, Co-II and In-II) on the NH3 removal efficiency, a field experiment was continuously carried out for more than eight months. The results demonstrated that under the intermittent aeration mode (In-II), the NH3 removal efficiency reached 99.2 ± 0.1% when the inlet NH3 concentration was 7.5-32.3 mg m−3 (9.8-42.5 ppmv). The maximum and critical elimination capacity of the biotrickling filter was 22.6 and 4.9 g NH3 m−3 h−1, respectively. The effluent concentration of NH3 was lower than 1.0 mg m−3, which meets the first class discharge standards of GB14554-93. When the concentration of free ammonia in the trickling liquid was varied from 0.1 to 0.4 mg L−1, the nitrification yield was between 47.9% and 103.8%. In addition, the optimum liquid tricking velocity (LTV) of the biotrickling filter was 0.5 m3 m−2 h−1 for low inlet concentrations and 2.2 m3 m−2 h−1 for high inlet concentrations. Therefore, the use of the biotrickling filter for the compost under the third aeration mode (In-II) yielded an effective optimum NH3 removal and reduced the nitrogen loss in the compost. 相似文献
127.
Amines have been considered as promising candidates for post-combustion CO2 capture. A mechanistic understanding for the chemical processes involved in the capture and release of CO2 is important for the rational design of amines. In this study, the structural effects of amines on the kinetic competition among three typical products (carbamates, carbamic acids and bicarbonate) from amines + CO2 were investigated, in contrast to previous thermodynamic studies to tune the reaction of amines with CO2 based on desirable reaction enthalpy and reaction stoichiometry. We used a quantum chemical method to calculate the activation energies (Ea) for the reactions of a range of substituted monoethanolamines with CO2 covering three pathways to the three products. The results indicate that the formation of carbamates is the most favorable, among the three considered products. In addition, we found that the Ea values for all pathways linearly correlate with pKa of amines, and more importantly, the kinetic competition between carbamate and bicarbonate absorption pathways varies with pKa of the amines, i.e. stronger basicity results in less difference in Ea. These results highlight the importance of the consideration of kinetic competition among different reaction pathways in amine design. 相似文献
128.
Hua Wang Yun Zhu Carey Jang Che-Jen Lin Shuxiao Wang Joshua S. Fu Jian Gao Shuang Deng Junping Xie Dian Ding Xuezhen Qiu Shicheng Long 《环境科学学报(英文版)》2015
Due to the increasingly stringent standards, it is important to assess whether the proposed emission reduction will result in ambient concentrations that meet the standards. The Software for Model Attainment Test—Community Edition (SMAT-CE) is developed for demonstrating attainment of air quality standards of O3 and PM2.5. SMAT-CE improves computational efficiency and provides a number of advanced visualization and analytical functionalities on an integrated GIS platform. SMAT-CE incorporates historical measurements of air quality parameters and simulated air pollutant concentrations under a number of emission inventory scenarios to project the level of compliance to air quality standards in a targeted future year. An application case study of the software based on the U.S. National Ambient Air Quality Standards (NAAQS) shows that SMAT-CE is capable of demonstrating the air quality attainment of annual PM2.5 and 8-hour O3 for a proposed emission control policy. 相似文献
129.
To better understand the diversity of metal resistance genetic determinant from microbes that survived atmetal tailings in northwest of China, a highly elevated level of heavymetal containing region, genomic analyses was conducted using genome sequence of three native metal-resistant plant growth promoting bacteria (PGPB). It shows that: Mesorhizobium amorphae CCNWGS0123 contains metal transporters from P-type ATPase, CDF (Cation Diffusion Facilitator), HupE/UreJ and CHR (chromate ion transporter) family involved in copper, zinc, nickel as well as chromate resistance and homeostasis. Meanwhile, the putative CopA/CueO system is expected to mediate copper resistance in Sinorhizobium meliloti CCNWSX0020 while ZntA transporter, assisted with putative CzcD, determines zinc tolerance in Agrobacterium tumefaciens CCNWGS0286. The greenhouse experiment provides the consistent evidence of the plant growth promoting effects of these microbes on their hosts by nitrogen fixation and/or indoleacetic acid (IAA) secretion, indicating a potential in-site phytoremediation usage in themining tailing regions of China. 相似文献
130.
Yun Zhu Yanwen Lao Carey Jang Chen-Jen Lin Jia Xing Shuxiao Wang Joshua S. Fu Shuang Deng Junping Xie Shicheng Long 《环境科学学报(英文版)》2015
This article describes the development and implementations of a novel software platform that supports real-time, science-based policy making on air quality through a user-friendly interface. The software, RSM-VAT, uses a response surface modeling (RSM) methodology and serves as a visualization and analysis tool (VAT) for three-dimensional air quality data obtained by atmospheric models. The software features a number of powerful and intuitive data visualization functions for illustrating the complex nonlinear relationship between emission reductions and air quality benefits. The case study of contiguous U.S. demonstrates that the enhanced RSM-VAT is capable of reproducing the air quality model results with Normalized Mean Bias < 2% and assisting in air quality policy making in near real time. 相似文献