全文获取类型
收费全文 | 719篇 |
免费 | 7篇 |
国内免费 | 33篇 |
专业分类
安全科学 | 10篇 |
废物处理 | 39篇 |
环保管理 | 41篇 |
综合类 | 51篇 |
基础理论 | 102篇 |
污染及防治 | 415篇 |
评价与监测 | 57篇 |
社会与环境 | 40篇 |
灾害及防治 | 4篇 |
出版年
2023年 | 30篇 |
2022年 | 152篇 |
2021年 | 142篇 |
2020年 | 47篇 |
2019年 | 48篇 |
2018年 | 40篇 |
2017年 | 52篇 |
2016年 | 45篇 |
2015年 | 25篇 |
2014年 | 37篇 |
2013年 | 36篇 |
2012年 | 21篇 |
2011年 | 19篇 |
2010年 | 7篇 |
2009年 | 9篇 |
2008年 | 10篇 |
2007年 | 9篇 |
2006年 | 6篇 |
2005年 | 6篇 |
2004年 | 3篇 |
2003年 | 3篇 |
2000年 | 2篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1994年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1985年 | 1篇 |
1974年 | 1篇 |
排序方式: 共有759条查询结果,搜索用时 265 毫秒
381.
High-surface-area mesoprous powders of γ-Al2O3 doped with Cu2+, Cr3+, and V3+ ions were prepared via a modified sol-gel method and were investigated as catalysts for the oxidation of chlorinated organic compounds. The composites retained high surface areas and pore volumes comparable with those of undoped γ-Al2O3 and the presence of the transition metal ions enhanced their surface acidic properties. The catalytic activity of the prepared catalysts in the oxidation of 1,2-dichloroethane (DCE) was studied in the temperature range of 250-400℃. The catalytic activity and product selectivity were strongly dependent on the presence and the type of dopant ion. While Cu2+- and Cr3+-containing catalysts showed 100% conversion at 300℃ and 350℃, V3+-containing catalyst showed considerably lower conversion. Furthermore, while the major products of the reactions over γ-alumina were vinyl chloride (C2H3Cl) and hydrogen chloride (HCl) at all temperatures, Cu- and Cr-doped catalysts showed significantly stronger capability for deep oxidation to CO2. 相似文献
382.
Yin Liu Matthias C. Rillig Quan Liu Jingjing Huang Muhammad Amjad Khan Xiaohui Li Qin Liu Qingqing Wang Xuesong Su Linyi Lin Yang Bai Genmao Guo Yi Huang Yong Sik Ok Shan Hu Junfeng Wang Honggang Ni Qing Huang 《Frontiers of Environmental Science & Engineering》2023,17(9):110
383.
Gauba N Mahmooduzzafar Siddiqi TO Umar S Iqbal M 《Journal of environmental biology / Academy of Environmental Biology, India》2007,28(2):303-306
The effect of mercury (Hg) on the biochemical parameters of Lycopersicon esculentum Mill leaf was studied. Application of mercuric chloride in varying concentrations (0.5, 1.0, 1.5 and 2.0 mM HgCl2 kg(-1) sand) caused significant reduction that went up to 89% and 72% chlorophyll a and chlorophyll b contents respectively (at flowering stage), 69% in carotenoid content, 64% in total soluble protein content and 91% in nitrate reductase activity (all at post-flowering stage). The amounts of nitrate and proline increased maximally (151% and 143% respectively) at the flowering stage, whereas total soluble sugar enhanced by 57% at the post-flowering stage. Changes observed in most of the parameters, were concentration dependent. Such studies seem to be able to discover suitable bioindicators of heavy metal pollution. 相似文献
384.
Environmental factors and its influence on human health in BRICS: implications for human development
Wang Wenxin Hafeez Muhammad Jiang Hong Ahmad Waseem Badar Hammad Salahodjaev Raufhon 《Environmental science and pollution research international》2023,30(9):22509-22519
Environmental Science and Pollution Research - BRICS economies are facing severe environmental issues that exert a detrimental impact on human health. The analysis intends to examine the impact of... 相似文献
385.
Imran Muhammad Islam Azhar Ul Tariq Muhammad Adnan Siddique Muhammad Hussnain Shah Noor Samad Khan Zia Ul Haq Amjad Muhammad Din Salah Ud Shah Ghulam Mustafa Naeem Muhammad Asif Nadeem Muhammad Nawaz Muhammad Rizwan Muhammad 《Environmental science and pollution research international》2019,26(24):24489-24502
Environmental Science and Pollution Research - The present study aims at evaluating the batch scale potential of cotton shell powder (CSP), Moringa oleifera leaves (ML), and magnetite-assisted... 相似文献
386.
Mumtaz Shumaila Ali Shaukat Khan Rida Shakir Hafiz Abdullah Tahir Hafiz Muhammad Mumtaz Samiara Andleeb Saiqa 《Environmental science and pollution research international》2020,27(9):8953-8964
Environmental Science and Pollution Research - Due to industrial and urban sewage, the metal contaminations in aquatic and terrestrial environments are increasing day by day, especially in... 相似文献
387.
Naqvi Syed Asif Ali Shah Syed Ale Raza Mehdi Muhammad Abuzar 《Environmental science and pollution research international》2020,27(34):42830-42849
Environmental Science and Pollution Research - This study quantifies the effect of real income, financial development, trade openness, and renewable energy consumption on the ecological footprint... 相似文献
388.
Faheem Du Jiangkun Kim Sang Hoon Hassan Muhammad Azher Irshad Sana Bao Jianguo 《Environmental science and pollution research international》2020,27(30):37286-37312
Environmental Science and Pollution Research - The advanced oxidation processes (AOPs), especially sulphate radical (SO4•−)–based AOPs (SR-AOPs), have been considered more... 相似文献
389.
Kongbuamai Nattapan Zafar Muhammad Wasif Zaidi Syed Anees Haider Liu Yun 《Environmental science and pollution research international》2020,27(32):40171-40186
Environmental Science and Pollution Research - This paper investigates the impact of economic growth, energy consumption, tourism, trade openness, and population density on the ecological... 相似文献
390.
Muhammad Yar Khuhawar Rafi O. Zaman Brohi Taj Muhammad Jahangir Muhammad Farooque Lanjwani 《Environmental monitoring and assessment》2018,190(8):492
Seven representative sampling stations were selected from Indus Delta comprising of (1) Keti Bander, (2) Darya Peer, (3) Kharo Chanr, (4) Jati, (5) Shah Bander, (6) Nariri Dhand and (7) Left Bank Outfall Drain (LBOD) near Rupa Mari. The sampling scheme was repeated seven times during 2014–2015 for 1 year. The samples were analysed for temperature, conductivity, pH, hardness, chloride, alkalinity, dissolved oxygen, biological oxygen demand, chemical oxygen demand, sulphate, orthophosphate-P, nitrite-N, nitrate-N, Na, K, Fe, Ni, Cr, Co, Cd, Zn, Cu, Pb and As. The analysis was carried out using standard analytical procedures. A number of parameters crossed the WHO permissible limits and water quality guidelines for aquatic life and indicated pollution within coastal region. Coefficient of correlation (r) among physicochemical parameters and metal ions were examined and a number of parameters did not correlate positively and did not indicate natural origin and may indicate their presence due to human activity. The samples were examined for cluster analysis, and principal component analysis. The samples also indicated the presence of Presumptive Coliform, Faecal coliform and E. coli. 相似文献