全文获取类型
收费全文 | 5066篇 |
免费 | 39篇 |
国内免费 | 14篇 |
专业分类
安全科学 | 74篇 |
废物处理 | 277篇 |
环保管理 | 295篇 |
综合类 | 1190篇 |
基础理论 | 902篇 |
环境理论 | 4篇 |
污染及防治 | 1550篇 |
评价与监测 | 448篇 |
社会与环境 | 256篇 |
灾害及防治 | 123篇 |
出版年
2023年 | 47篇 |
2022年 | 139篇 |
2021年 | 173篇 |
2020年 | 97篇 |
2019年 | 60篇 |
2018年 | 179篇 |
2017年 | 123篇 |
2016年 | 229篇 |
2015年 | 119篇 |
2014年 | 279篇 |
2013年 | 447篇 |
2012年 | 318篇 |
2011年 | 281篇 |
2010年 | 213篇 |
2009年 | 160篇 |
2008年 | 258篇 |
2007年 | 386篇 |
2006年 | 355篇 |
2005年 | 197篇 |
2004年 | 126篇 |
2003年 | 160篇 |
2002年 | 117篇 |
2001年 | 77篇 |
2000年 | 53篇 |
1999年 | 37篇 |
1998年 | 16篇 |
1997年 | 15篇 |
1996年 | 15篇 |
1995年 | 25篇 |
1994年 | 21篇 |
1993年 | 12篇 |
1992年 | 9篇 |
1990年 | 10篇 |
1989年 | 9篇 |
1982年 | 11篇 |
1970年 | 8篇 |
1967年 | 8篇 |
1966年 | 11篇 |
1965年 | 16篇 |
1964年 | 29篇 |
1963年 | 13篇 |
1962年 | 17篇 |
1961年 | 14篇 |
1960年 | 14篇 |
1959年 | 31篇 |
1958年 | 33篇 |
1957年 | 21篇 |
1956年 | 19篇 |
1955年 | 18篇 |
1954年 | 9篇 |
排序方式: 共有5119条查询结果,搜索用时 15 毫秒
861.
Fernández-Landero Sandra Giráldez Inmaculada Fernández-Caliani Juan Carlos 《Environmental geochemistry and health》2021,43(10):4251-4264
Environmental Geochemistry and Health - Chestnut soils developed over mineralized areas of southwestern Spain are characterized by high baseline concentrations of geogenic trace elements, notably... 相似文献
862.
Andráš Peter Dadová Jana Romančík Roman Borošová Daniela Midula Pavol Dirner Vojtech 《Environmental geochemistry and health》2021,43(9):3675-3681
Environmental Geochemistry and Health - The abandoned Malachov deposit belongs among the most important historic Hg deposits in the world. The soil, groundwater, surface water, plants, and animals... 相似文献
863.
864.
865.
866.
867.
868.
Paula?Adánez SanjuánEmail author Belinda?Flem Juan?F.?Llamas Borrajo Juan?Locutura Rupérez Angel?Garcia Cortés 《Environmental geochemistry and health》2016,38(2):449-468
Changes in the principal sources of Pb in overbank sediment profiles have been documented for two Spanish areas by using Pb isotopes and Pb concentrations. These locations (Madrid and Tinto–Odiel basin) represent two of the most contaminated regions in Spain. The Community of Madrid is characterized by heavy industrial and urban activity, focused mainly in Madrid City. The Tinto–Odiel basin drains the Iberian Pyrite Belt, which hosts many polymetallic massive sulphides and is heavily affected by mining activities in their headwaters. It has been proven that the influence of anthropogenic activity is reflected in these overbank deposits by variations in Pb concentrations that, in general, correlate with shifts in the 206Pb/207Pb ratio. Rivas profile (downstream of Madrid) was found to be the most anthropogenically influenced site. The sediments within this profile which were recently deposited (170 ± 40 years BP) have the least radiogenic signatures. 206Pb/207Pb ratios ranged between 1.1763 and 1.1876 indicating significant contributions of anthropogenic Pb. In contrast, profiles upstream of Madrid possess an average 206Pb/207Pb ratio of 1.2272. It is difficult to clearly identify the most prominent source as the sediments appear to be characterized by an input from several sources. The floodplain profiles in the Tinto–Odiel basin exhibit uniform 206Pb/207Pb ratios ranging from 1.1627 (Odiel river) to 1.1665 (Tinto river). These ratios are similar to the ones possessed by sulphide ores in the area and differ from the ratios of other nonmineralized formations in the basin, indicating that mining activities are the primary, if not sole, source of Pb to the sediments. 相似文献
869.
R. Stakėnienė K. Jokšas A. Galkus E. Raudonytė-Svirbutavičienė 《Chemistry and Ecology》2016,32(4):357-377
A total of 22 bottom surface sediment samples were collected from Klaip?da Harbour, Lithuania (Baltic Sea). Sediment parameters, such as grain size and concentrations of total organic carbon, aliphatic hydrocarbons (ALHs) and polycyclic aromatic hydrocarbons (PAHs), were determined. Hydrocarbon contamination levels in the sediments were estimated based on classifications provided in the literature, and potential biological effects were assessed based on the effects range low–effects range median values of the Sediment Quality Guidelines and on the total toxic benzo(a)pyrene equivalent. The results demonstrated that concentrations of PAHs and total aliphatic hydrocarbons in the sediments varied between 1.6 and 5456?ng?g?1 d.w. and 6.9 and 727?μg?g?1 d.w., respectively. In most cases, the concentrations of ALHs and PAHs in the sediments indicated low to moderate levels of pollution and were not observed to have any significant adverse effects on living biota. To determine possible sources of hydrocarbons, hydrocarbon compositions were analysed, and ALHs’ and PAHs’ specific diagnostic ratios were calculated. According to the results, the Klaip?da Harbour bottom sediments were dominated by PAHs of pyrogenic origin, whereas the origin of ALHs was mixed, that is, anthropogenic with a biogenic (aquatic and terrestrial) input. 相似文献
870.
Morton-Bermea Ofelia Beramendi-Orosco Laura Martínez-Reyes Ángeles Hernández-Álvarez Elizabeth González-Hernández Galia 《Environmental geochemistry and health》2016,38(1):195-202
Environmental Geochemistry and Health - Tree rings may be used as indicators of contamination events providing information on the chronology and the elemental composition of the contamination. In... 相似文献