全文获取类型
收费全文 | 1012篇 |
免费 | 10篇 |
国内免费 | 34篇 |
专业分类
安全科学 | 50篇 |
废物处理 | 84篇 |
环保管理 | 93篇 |
综合类 | 88篇 |
基础理论 | 154篇 |
环境理论 | 1篇 |
污染及防治 | 382篇 |
评价与监测 | 142篇 |
社会与环境 | 52篇 |
灾害及防治 | 10篇 |
出版年
2023年 | 27篇 |
2022年 | 131篇 |
2021年 | 101篇 |
2020年 | 39篇 |
2019年 | 44篇 |
2018年 | 57篇 |
2017年 | 65篇 |
2016年 | 61篇 |
2015年 | 26篇 |
2014年 | 40篇 |
2013年 | 125篇 |
2012年 | 46篇 |
2011年 | 56篇 |
2010年 | 41篇 |
2009年 | 28篇 |
2008年 | 26篇 |
2007年 | 27篇 |
2006年 | 21篇 |
2005年 | 11篇 |
2004年 | 15篇 |
2003年 | 9篇 |
2002年 | 8篇 |
2001年 | 7篇 |
2000年 | 8篇 |
1999年 | 5篇 |
1998年 | 1篇 |
1997年 | 2篇 |
1996年 | 1篇 |
1995年 | 5篇 |
1994年 | 5篇 |
1993年 | 1篇 |
1992年 | 2篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1985年 | 3篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1976年 | 1篇 |
1974年 | 1篇 |
1970年 | 1篇 |
1964年 | 1篇 |
1959年 | 1篇 |
排序方式: 共有1056条查询结果,搜索用时 15 毫秒
371.
372.
Groundwater contamination due to pesticide applications on agricultural lands is of great environmental concern. The mathematical
models help to understand the mechanism of pesticide leaching in soils towards groundwater. We developed a user-friendly model
called ArcPRZM-3 by integrating widely used Pesticide Root Zone Model version 3 (PRZM-3) using Visual Basic and Geographic
Information System (GIS) based Avenue programming. ArcPRZM-3 could be used to simulate pesticide leaching towards groundwater
with user-friendly input interfaces coupled with databases of crops, soils and pesticides. The outputs from ArcPRZM-3 could be
visualized in user-friendly formats of tables, charts and maps. In this study we evaluated ArcPRZM-3 model by simulating bentazon
leaching in soil towards groundwater. ArcPRZM-3 was applied to 37 sites in Woodru County, Arkansas, USA to observe the daily
average dissolved bentazon concentration for soybean, sorghum and rice at a depth of 1.8 m for a period of two years. Nineteen ranks
of bentazon leaching potential were obtained using ArcPRZM-3 for all sites having di erent soil and crop combinations. ArcPRZM-3
simulation results for bentazon were compatible with the field monitored data in term of relative ranking and trend, although some
uncertainties exist. This study indicated that macropore flow mechanism would be important in analyzing the e ect of irrigation on
groundwater contamination due to pesticides. Overall, ArcPRZM-3 could be used to simulate pesticide leaching towards groundwater
more e ciently and e ectively as compared to PRZM-3. 相似文献
373.
With the increasing demand for fossil based energy and implementation of progressively strict environmental pollution control
standards, treatment of a large amount of co-produced waters (CPWs) from fossil based energy production has become increasingly
important. Removal of bicarbonate with H2SO4 has been recently studied as a simple and cost-e ective method to decrease the alkalinity
of CPWs. The present work investigates the kinetics of the reaction between H2SO4 and NaHCO3, which could provide the base for
scaling-up the CPW treatment technology. Based on the measured quantity change of the CO2 gas generated from the reaction between
H2SO4 and NaHCO3 with time under specified initial reaction conditions, the reaction orders with respect to H2SO4 and NaHCO3 were
determined. Experiments were also conducted within the temperature of 15–30°C to find various global rate coe cients of the reaction
to calculate the activation energy and the pre-exponential factor of the empirical Arrhenius form of the bicarbonate removal reaction,
which are 197.7 kJ/mol and 3.13 1034 (mol??3:7 L3:7 sec??1), respectively. 相似文献
374.
Public perceptions and attitudes to biological risks: Saudi Arabia and regional perspectives 下载免费PDF全文
Saudi Arabia has experienced frequent occurrences of biological disasters due to a wide range of generator factors, including natural disasters and epidemics. A national survey (n=1,164) was conducted across 13 regions of Saudi Arabia to examine public perceptions to the risk of a biological disaster. The primary results reveal: (a) a degree of knowledge about biological threats such as SARS and H5N1 flu, despite the lack of individual experience with disasters; (b) age, gender, education and faith are positively related to the perception of biological risk; and (c) a number of important community resilience factors exist, including faith, education and willingness. This study concludes that the development of adapted resilience strategies in disaster management can be achieved through public education and training involving cooperation with official organisations and religious authorities in the country to increase public awareness, knowledge and skills in mitigating biological threats. 相似文献
375.
Xiao-jun Wang Jian-yun Zhang Shamsuddin Shahid Amgad ElMahdi Rui-min He Xin-gong Wang Mahtab Ali 《Mitigation and Adaptation Strategies for Global Change》2012,17(1):65-75
Yellow River, is designated as “the cradle of Chinese civilization” and played a key role not only in the country’s economic
development but also in the historic and cultural identity of the Chinese people. With the rapid economic development and
population growth, water demand for industry and households has increased significantly in the Yellow River basin; this has
caused an increasing gap between water supply and demand. Competing water demands triggered conflicts between disparate water
users on different scales such as the rich and the poor, or between different sectors and regions, such as domestic and agriculture,
agriculture and industry, upstream and downstream, rural and urban areas, etc. Ensuring equity in water supply for conflicting
water users is one of the major challenges that facing water managers and in particular water management in the Yellow River
basin. In this paper, a method has been developed to calculate the Gini coefficient of water use as an indicator to measure
the equality in domestic water supply. A dual domestic water use structure model is employed for this purpose. The developed
method is subsequently applied to assess the equality in domestic water supply in the Yellow River. Data of population growth,
domestic water use and economic development over the time period 1999-2006 are used to calculate the Gini coefficient of water
use over the same length of period. The result shows a decreasing trend in Gini coefficient of domestic water use in the Yellow
River basin after 2001 which means domestic water use is becoming more and more equitable in the basin. The study justifies
that the Gini coefficient of water use can be used and recommended as a useful tool for the water management especially in
the context of global change. 相似文献
376.
nSiO_2纳米颗粒是一种广泛应用的工程纳米材料,为增加其对水溶液中Cd~(2+)的吸附性能,采用接枝改性的方法制备出乙二胺四乙酸(EDTA)改性nSiO_2纳米颗粒(EDTA-nSiO_2),并用透射电镜、氮气吸附-解吸、红外光谱和差热分析等手段对其进行了结构表征,同时以其为吸附剂,通过批处理实验法探讨了体系pH、吸附时间、温度、离子强度等因素对Cd~(2+)吸附的影响,并结合X射线能谱(XPS)分析对其吸附机制进行了分析.结果表明,以EDTA为改性剂,可以成功制备出稳定性良好的EDTA-nSiO_2纳米颗粒,其对Cd~(2+)的吸附受体系p H控制;nSiO_2对Cd~(2+)的吸附量较小,EDTA改性可增加nSiO_2对Cd~(2+)的吸附作用,随着p H的升高,Cd~(2+)的吸附效果逐渐增强,在p H大于4.0后逐渐趋于稳定.EDTA-nSiO_2对Cd~(2+)的吸附速率较快,可在1 h内达到吸附平衡.EDTA-nSiO_2对Cd~(2+)的吸附为吸热的自发过程,吸附等温线可用Langmuir模型描述.NaCl浓度增加会导致Cd~(2+)的吸附量下降,当体系Na Cl浓度从0增加到100 mmol·L~(-1),Cd~(2+)的最大吸附量从0.433 mmol·g-1降低至0.294mmol·g-1.0.1 mol·L~(-1)HCl是较为合适的吸附剂再生液,Cd~(2+)洗脱率约94.36%.结合pH、温度、离子强度、再生和XPS分析结果,可以推测出EDTA-nSiO_2对Cd~(2+)的吸附是包含有简单的物理吸附和离子交换过程,并以化学络合为主的吸附过程.EDTA-nSiO_2是一种对水体Cd~(2+)具有较好吸附能力的工程纳米材料吸附剂. 相似文献
377.
Dzumbira Walter Ali Nisar Duanmu Chuansong Yang Yong Khan Adnan Ali Farman Bilal Muhammad Aleya Lotfi Iqbal Hafiz M. N. 《Environmental science and pollution research international》2022,29(4):4822-4842
Environmental Science and Pollution Research - Metal–organic frameworks (MOFs) are a polymer hybrid family of compounds comprising metal ions that have been deliberately incorporated in... 相似文献
378.
Khan Anoar Ali Mukherjee Shraboni Mondal Madhumanti Boddu Sumalatha Subbaiah Tondepu Halder Gopinath 《Environmental science and pollution research international》2022,29(41):61856-61869
Environmental Science and Pollution Research - The current investigation focuses on a systematic study of application of two dried algal biomass (i.e., Nostoc sp. and Turbinaria vulgaris) in... 相似文献
379.
Irfan Muhammad Dawar Khadim Fahad Shah Mehmood Imran Alamri Saud Siddiqui Manzer H. Saud Shah Khattak Jabar Zaman Khan Ali Shamsher Hassan Shah Nawaz Taufiq Hammad Hafiz Mohkum Banout Jan Nasim Wajid 《Environmental science and pollution research international》2022,29(25):37676-37684
Environmental Science and Pollution Research - Biochar remediation efficiency could be enhanced through numerous treatments such as acids treatment. Still, there has little work done on... 相似文献
380.
Islam Md.Monirul Ali Md.Idris Ceh Brian Singh Sanjeet Khan Muhammad Kamran Dagar Vishal 《Environmental science and pollution research international》2022,29(23):34231-34247
Environmental Science and Pollution Research - Energy consumption for sustainable development has become a crucial issue in recent years. The anthropogenic effects of traditional energy sources... 相似文献