全文获取类型
收费全文 | 270篇 |
免费 | 0篇 |
国内免费 | 5篇 |
专业分类
安全科学 | 15篇 |
废物处理 | 19篇 |
环保管理 | 53篇 |
综合类 | 26篇 |
基础理论 | 55篇 |
污染及防治 | 78篇 |
评价与监测 | 19篇 |
社会与环境 | 10篇 |
出版年
2022年 | 7篇 |
2021年 | 5篇 |
2020年 | 3篇 |
2019年 | 6篇 |
2018年 | 10篇 |
2017年 | 4篇 |
2016年 | 8篇 |
2015年 | 5篇 |
2014年 | 5篇 |
2013年 | 24篇 |
2012年 | 15篇 |
2011年 | 8篇 |
2010年 | 14篇 |
2009年 | 9篇 |
2008年 | 6篇 |
2007年 | 8篇 |
2006年 | 20篇 |
2005年 | 10篇 |
2004年 | 8篇 |
2003年 | 7篇 |
2002年 | 10篇 |
2001年 | 7篇 |
2000年 | 7篇 |
1999年 | 4篇 |
1998年 | 4篇 |
1997年 | 3篇 |
1996年 | 4篇 |
1995年 | 4篇 |
1994年 | 4篇 |
1993年 | 2篇 |
1992年 | 4篇 |
1990年 | 6篇 |
1989年 | 2篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1985年 | 2篇 |
1984年 | 3篇 |
1982年 | 3篇 |
1981年 | 6篇 |
1980年 | 2篇 |
1979年 | 3篇 |
1978年 | 1篇 |
1975年 | 1篇 |
1973年 | 2篇 |
1971年 | 1篇 |
1966年 | 1篇 |
1961年 | 1篇 |
1957年 | 1篇 |
1955年 | 1篇 |
排序方式: 共有275条查询结果,搜索用时 15 毫秒
151.
Brown RW Gonzales C Hooper MJ Bayat AC Fornerette AM McBride TJ Longoria T Mielke HW 《Environmental geochemistry and health》2008,30(6):541-547
Residential lead (Pb) contamination, resulting from decades-long use of leaded gasoline and lead-based paint, is likely to
be present in soils in most urban areas. A screening level sampling effort demonstrated that Lubbock, Texas, USA, like other
cities of its age and size, has areas of elevated soil Pb. This effort was based on soil sampling performed on residential,
commercial and thoroughfare properties. The focus of this study was to investigate that component of soil contamination due
to combustion of leaded gasoline. Soils were collected from the 1–2 cm surface layer from street-side property borders, well
away from buildings that might lead to soil contamination from leaded paint chips. All samples were analyzed for Pb after
a 1 M HNO3 mild extraction to determine the amount of bioavailable Pb. Two of three transects through the city demonstrated significant
trends of decreasing Pb concentrations with distance from the city center, paralleling a decrease in developed property age.
Peak soil Pb concentrations outside city development was 4.9 ± 0.6 mg/kg while the median concentration for the city was 35.4 mg/kg.
Peak soil Pb concentrations in the city center ranged from 90.0 to 174.0 mg/kg and decreased exponentially to 6.0–9.0 mg/kg
at the furthest terminus of the residential transects. 相似文献
152.
Recio-Sánchez Gonzalo Tighe-Neira Ricardo Alvarado Claudia Inostroza-Blancheteau Claudio Benito Noelia García-Rodríguez Alba Marcos Ricard Pesenti Héctor Carmona Erico R. 《Environmental science and pollution research international》2019,26(15):15115-15123
Environmental Science and Pollution Research - In the present work, silver nanoparticles (AgNPs) synthetized with Cryptocarya alba (Peumo) leaf extract were studied. The fabrication method was... 相似文献
153.
Ray C. Whittemore John Beebe 《Journal of the American Water Resources Association》2000,36(3):493-499
ABSTRACT: Better Assessment Science Integrating Point and Non‐point Sources (BASINS) is a geographic‐based watershed assessment tool developed by EPA's Office of Water to help states more efficiently target and evaluate water‐bodies that are not meeting water quality standards. BASINS (EPA, 1996a, 1998) brings together data on water quality and quantity, land uses, point source loadings, and other related spatial data with supporting nonpoint and water quality models at a quicker and more effective pace. EPA developed BASINS, to better integrate point and nonpoint source water quality assessments for the Nation's 2100+ watersheds. In its zeal to achieve this endpoint, EPA has initiated a simplistic approach that was expected to grow through scientific enhancements as TMDL developers become more familiar with modeling requirements. BASINS builds upon federal databases of water quality conditions and point source loadings for numerous parameters where quality assurance is suspect in some cases. Its design allows comprehensive assessments and modeling in typical Total Maximum Daily Load (TMDL) computations. While the TMDL utility is the primary reason BASINS was developed, other longer‐range water quality assessments will become possible as the Agency expands the suite of assessment models and databases in future releases. The simplistic approach to modeling and user‐friendly tools gives rise, however, to technical and philosophical concerns related to default data usage. Seamless generation of model input files and the failure of some utilities to work properly suggest to NCASI that serious problems may still exist and prompts the need for a more rigorous peer‐review. Furthermore, sustainable training becomes paramount, as some older modelers will be unfamiliar with Geographic Information System (GIS) technology and associated computer skills. Overall, however, BASINS was judged to be an excellent beginning tool to meet the complex environmental modeling needs in the 21st Century. 相似文献
154.
155.
Dipa Ray Papri Roy Suparna Sengupta Siba Prasad Sengupta Amar K. Mohanty Manjusri Misra 《Journal of Polymers and the Environment》2009,17(1):49-55
Starch/Poly(vinylalcohol) blends in two different ratios (60:40 and 50:50) were prepared with glycerol as a plasticizer. Films
were cast by a solution casting method. One set of films were filled with 10 wt% of bentonite clay and another set of films
were crosslinked with epichlorohydrin in an alkaline medium. The prepared film samples were characterized with dynamic mechanical
analysis (DMA) and thermogravimetric analysis (TGA). The presence of clay and crosslinking with epichlorohydrin was found
to have considerable effect on the dynamic mechanical properties and thermal stability of the films. Intercomponent H-bonding
between starch, Poly(vinylalcohol) and glycerol enhanced the thermal stability of the films. But incorporation of clay and
crosslinking with epichlorohydrin enhanced the steric crowding and lowered the thermal stability of the films. 相似文献
156.
As a basic means to control odorants released from a landfill leachate treatment station (LLTS), effluents venting from this station were treated via incineration with methane rich landfill gas (at 750 °C). A list of the key offensive odorants covering 22 chemicals was measured by collecting those gas samples both before and after the treatment. Upon incineration, the concentration levels of most odorants decreased drastically below threshold levels. The sum of odorant intensities (SOIs), if compared between before and after incineration, decreased from 6.94 (intolerable level) to 3.45 (distinct level). The results indicate that the thermal incineration method can be used as a highly efficient tool to remove most common odorants (e.g., reduced sulfur species), while it is not so for certain volatile species (e.g., carbonyls, fatty acids, etc.). 相似文献
157.
Swapan Kumar Ghosh Sujoy Pal Sumanta Ray 《Environmental science and pollution research international》2013,20(7):4339-4355
Plastic is a broad name given to the different types of organic polymers having high molecular weight and is commonly derived from different petrochemicals. Plastics are generally not biodegradable or few are degradable but in a very slow rate. Day by day, the global demand of these polymers is sharply increasing; however, considering their abundance and potentiality in causing different environmental hazards, there is a great concern in the possible methods of degradation of plastics. Recently, there have been some debates at the world stage about the potential degradation procedures of these synthetic polymers and microbial degradation has emerged as one of the potential alternative ways of degradation of plastics. Alternatively, some scientists have also reported many adverse effects of these polymers in human health, and thus, there is an immediate need of a potential screening of some potential microbes to degrade these synthetic polymers. In this review, we have taken an attempt to accumulate all information regarding the chemical nature along with some potential microbes and their enzymatic nature of biodegradation of plastics along with some key factors that affect their biodegradability. 相似文献
158.
Conservation of Coral Reefs after the 1998 Global Bleaching Event 总被引:17,自引:0,他引:17
159.
Emilie-Jane Ens Peter Cooke Ray Nadjamerrek Seraine Namundja Victor Garlngarr Dean Yibarbuk 《Environmental management》2010,45(4):751-758
Aboriginal land managers have observed that feral Asian water buffalo (Bubalis bubalis Lydekker) are threatening the ecological and cultural integrity of perennial freshwater sources in Arnhem Land, Australia.
Here we present collaborative research between the Aboriginal Rangers from Warddeken Land Management Limited and Western scientists
which quantified the ground-level impacts of buffalo on seven perennial freshwater springs of the Arnhem Plateau. A secondary
aim was to build the capacity of Aboriginal Rangers to self-monitor and evaluate the ecological outcomes of their land management
activities. Sites with high buffalo abundance had significantly different ground, ground cover, and water quality attributes
compared to sites with low buffalo abundance. The low buffalo abundance sites were characterized by tall herbaceous vegetation
and flat ground, whereas wallows, bare ground, and short ungrazed grasses were indicators of sites with high buffalo abundance.
Water turbidity was greater when buffalo abundance was high. The newly acquired monitoring skills and derived indicators of
buffalo damage will be used by Aboriginal Rangers to assess the ecological outcomes of their future buffalo control efforts
on the Arnhem Plateau. 相似文献
160.
Ray RC 《Journal of environmental biology / Academy of Environmental Biology, India》2004,25(4):489-495
The fungi Botryodiplodia theobromae and Rhizopus oryzae produce extracellular amylase when grown on a liquid medium containing 2% (WN) soluble starch or cassava starch residue(CSR) (as starch equivalent), a waste generated after extraction of starch from cassava, as the sole carbon source. Using CSR as the sole carbon source, the highest amylase activity of 3.25 and 3.8 units (mg, glucose released x ml(-1) x h(-1)) were obtained in shake flask cultures during the late stationary phase of growth of B. theobromae and R. oryzae, respectively. These values were slightly lower than the values obtained using soluble starch as the carbon source. Maximum enzyme synthesis in CSR incorporated medium occurred at the growth temperature of 30 degrees C and pH 6.0. Presence of inorganic NH4+ salts like ammonium acetate and ammonium nitrate in culture medium yielded more amylase than the other nitrogen sources. Amylase(s) production in the controlled environment of a Table-Top glass Jar Fermenter (2-L capacity) was 4.8 and 5.1 units for B. theobromae and R. oryzae, respectively using CSR as the carbon substrate. It is concluded that CSR, a cheap agricultural waste obtained after starch extraction from cassava could replace soluble starch as carbon substrate for commercial production of fungal amylase(s). 相似文献