全文获取类型
收费全文 | 670篇 |
免费 | 5篇 |
国内免费 | 19篇 |
专业分类
安全科学 | 18篇 |
废物处理 | 48篇 |
环保管理 | 62篇 |
综合类 | 38篇 |
基础理论 | 100篇 |
污染及防治 | 260篇 |
评价与监测 | 122篇 |
社会与环境 | 41篇 |
灾害及防治 | 5篇 |
出版年
2023年 | 15篇 |
2022年 | 65篇 |
2021年 | 67篇 |
2020年 | 18篇 |
2019年 | 26篇 |
2018年 | 32篇 |
2017年 | 35篇 |
2016年 | 37篇 |
2015年 | 31篇 |
2014年 | 32篇 |
2013年 | 84篇 |
2012年 | 24篇 |
2011年 | 44篇 |
2010年 | 35篇 |
2009年 | 22篇 |
2008年 | 21篇 |
2007年 | 14篇 |
2006年 | 14篇 |
2005年 | 11篇 |
2004年 | 10篇 |
2003年 | 5篇 |
2002年 | 4篇 |
2001年 | 10篇 |
2000年 | 1篇 |
1999年 | 5篇 |
1998年 | 1篇 |
1997年 | 2篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1991年 | 1篇 |
1990年 | 2篇 |
1989年 | 2篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1985年 | 3篇 |
1983年 | 1篇 |
1982年 | 3篇 |
1981年 | 2篇 |
1980年 | 2篇 |
1979年 | 3篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1972年 | 1篇 |
1964年 | 1篇 |
1963年 | 1篇 |
排序方式: 共有694条查询结果,搜索用时 343 毫秒
131.
Natural muds used as or in cosmetics may expose consumers to toxic metals and elements via absorption through the skin, inhalation
of the dried product, or ingestion (by children). Despite the extensive therapeutic and cosmetic use of the Dead Sea muds,
there apparently has been no assessment of the levels of such toxic elements as Pb, As, or Cd in the mud and mud-based products.
Inductively coupled plasma mass spectrometry analysis of eight toxic elements in samples collected from three black mud deposits
(Lisan Marl, Pleistocene age) on the eastern shore of the Dead Sea in Jordan revealed no special enrichment of toxic elements
in the mud. A similar analysis of 16 different commercial Dead Sea mud cosmetics, including packaged mud, likewise revealed
no toxic elements at elevated levels of concern. From a toxic element standpoint, the Dead Sea black muds and derivative products
appear to be safe for the consumer. Whatever the therapeutic benefits of the mud, our comparison of the elemental fingerprints
of the consumer products with those of the field samples revealed one disturbing aspect: Dead Sea black mud should not be
a significant component of such items as hand creams, body lotions, shampoo, and moisturizer. 相似文献
132.
Municipal solid waste management in Indian cities - A review 总被引:2,自引:0,他引:2
Municipal solid waste management (MSWM) is one of the major environmental problems of Indian cities. Improper management of municipal solid waste (MSW) causes hazards to inhabitants. Various studies reveal that about 90% of MSW is disposed of unscientifically in open dumps and landfills, creating problems to public health and the environment. In the present study, an attempt has been made to provide a comprehensive review of the characteristics, generation, collection and transportation, disposal and treatment technologies of MSW practiced in India. The study pertaining to MSWM for Indian cities has been carried out to evaluate the current status and identify the major problems. Various adopted treatment technologies for MSW are critically reviewed, along with their advantages and limitations. The study is concluded with a few fruitful suggestions, which may be beneficial to encourage the competent authorities/researchers to work towards further improvement of the present system. 相似文献
133.
Concerns over increased phosphorus (P) application with nitrogen (N)-based compost application have shifted the trend to P-based composed application, but focusing on one or two nutritional elements does not serve the goals of sustainable agriculture. The need to understand the nutrient release and uptake from different composts has been further aggravated by the use of saline irrigation water in the recent scenario of fresh water shortage. Therefore, we evaluated the leachability and phytoavailability of P, N, and K from a sandy loam soil amended with animal, poultry, and sludge composts when applied on a total P-equivalent basis (200 kg ha(-1)) under Cl(-) (NaCl)- and SO4(2-) (Na2SO4)-dominated irrigation water. Our results showed that the concentration of dissolved reactive P (DRP) was higher in leachates under SO(4)(2-) than Cl(-) treatments. Compost amendments differed for DRP leaching in the following pattern: sludge > animal > poultry > control. Maize (Zea mays L.) growth and P uptake were severely suppressed under Cl(-) irrigation compared with SO4(2-) and non-saline treatments. All composts were applied on a total P-equivalent basis, but maximum plant (shoot + root) P uptake was observed under sludge compost amendment (73.4 mg DW(-1)), followed by poultry (39.3 mg DW(-1)), animal (15.0 mg DW(-1)), and control (1.2 mg DW(-1)) treatment. Results of this study reveal that irrigation water dominated by SO4(2-) has greater ability to replace/leach P, other anions (NO3(-)), and cations (K+). Variability in P release from different bio-composts applied on a total P-equivalent basis suggested that P availability is highly dependent on compost source. 相似文献
134.
Organic matter has long been recognized as the main sorbent phase in soils for hydrophobic organic compounds (HOCs). In recent times, there has been an increasing realization that not only the amount, but also the chemical composition, of organic matter can influence the sorption properties of a soil. Here, we show that the organic carbon-normalized sorption coefficient (K(OC)) for diuron is 27-81% higher in 10 A11 horizons than in 10 matching A12 horizons for soils collected from a small (2ha) field. K(OC) was generally greater for the deeper (B) horizons, although these values may be inflated by sorption of diuron to clays. Organic matter chemistry of the A11 and A12 horizons was determined using solid-state 13C nuclear magnetic resonance (NMR) spectroscopy. K(OC) was positively correlated with aryl C (r2=0.59, significance level 0.001) and negatively correlated with O-alkyl C (r2=0.84, significance level <0.001). This is only the second report of correlations between whole soil K(OC) and NMR-derived measures of organic matter chemistry. We suggest that this success may be a consequence of limiting this study to a very small area (a single field). There is growing evidence that interactions between organic matter and clay minerals strongly affect K(OC). However, because the soil mineralogy varies little across the field, the influence of these interactions is greatly diminished, allowing the effect of organic matter chemistry on K(OC) to be seen clearly. This study in some way reconciles studies that show strong correlations between K(OC) and the chemistry of purified organic materials and the general lack of such correlations for whole soils. 相似文献
135.
In the present experiment the seeds of Cicer arietinum (L.) cv. Uday were inoculated with specific Rhizobium grown in sandy loam soil and were allowed to grow for 15 days. At this stage, the seedlings were supplied with 0, 50, 100 or 150 microM of cadmium in the form of cadmium chloride and sprayed with 0.01 microM of 28-homobrassinolide (HBL) at 30-day stage. The data indicated that plant fresh and dry mass, number of nodules, their fresh and dry mass, leghemoglobin content, nitrogen and carbohydrate content in the nodules, leaf chlorophyll content, nitrate reductase and carbonic anhydrase activities decreased proportionately with the increasing concentrations of cadmium but the content of proline and the activities of catalase, peroxidase and superoxide dismutase increased. The ill effect, generated by cadmium, was overcome if the stressed plants were sprayed with HBL. 相似文献
136.
Role of plant growth promoting rhizobacteria in the remediation of metal contaminated soils 总被引:2,自引:0,他引:2
Mohammad Saghir Khan Almas Zaidi Parvaze Ahmad Wani Mohammad Oves 《Environmental Chemistry Letters》2009,7(1):1-19
Pollution of the biosphere by the toxic metals is a global threat that has accelerated dramatically since the beginning of
industrial revolution. The primary source of this pollution includes the industrial operations such as mining, smelting, metal
forging, combustion of fossil fuels and sewage sludge application in agronomic practices. The metals released from these sources
accumulate in soil and in turn, adversely affect the microbial population density and physico-chemical properties of soils,
leading to the loss of soil fertility and yield of crops. The heavy metals in general cannot be biologically degraded to more
or less toxic products and hence, persist in the environment. Conventional methods used for metal detoxification produce large
quantities of toxic products and are cost-effective. The advent of bioremediation technology has provided an alternative to
conventional methods for remediating the metal-poisoned soils. In metal-contaminated soils, the natural role of metal-tolerant
plant growth promoting rhizobacteria in maintaining soil fertility is more important than in conventional agriculture, where
greater use of agrochemicals minimize their significance. Besides their role in metal detoxification/removal, rhizobacteria
also promote the growth of plants by other mechanisms such as production of growth promoting substances and siderophores.
Phytoremediation is another emerging low-cost in situ technology employed to remove pollutants from the contaminated soils.
The efficiency of phytoremediation can be enhanced by the judicious and careful application of appropriate heavy-metal tolerant,
plant growth promoting rhizobacteria including symbiotic nitrogen-fixing organisms. This review presents the results of studies
on the recent developments in the utilization of plant growth promoting rhizobacteria for direct application in soils contaminated
with heavy metals under a wide range of agro-ecological conditions with a view to restore contaminated soils and consequently,
promote crop productivity in metal-polluted soils across the globe and their significance in phytoremediation. 相似文献
137.
Sustainable technologies for on-site domestic wastewater treatment: a review with technical approach
Sharma Meena Kumari Tyagi Vinay Kumar Singh Nitin Kumar Singh Surya Pratap Kazmi Absar Ahmad 《Environment, Development and Sustainability》2022,24(3):3039-3090
Environment, Development and Sustainability - The rapid population growth has rendered the centralized sewerage systems a non-realistic option in sparsely populated areas, particularly in... 相似文献
138.
Soleymanfar Vahid Reza Makui Ahmad Taleizadeh Ata Allah Tavakkoli-Moghaddam Reza 《Environment, Development and Sustainability》2022,24(4):5317-5343
Environment, Development and Sustainability - In this work, a new model is developed to determine optimum sustainable economic order quantity (EOQ) and economic production quantity (EPQ) values for... 相似文献
139.
Weimin Zhu Chishti Muhammad Zubair Rehman Abdul Ahmad Manzoor 《Environment, Development and Sustainability》2022,24(4):4786-4809
Environment, Development and Sustainability - The prior empirical research focuses on examining only the procyclical impact of innovation on carbon emissions (CO2e), in the majority of cases, for... 相似文献
140.
气提式三重循环生物膜反应器处理制药废水中的甾体雌激素 总被引:1,自引:0,他引:1
为验证气提式三重循环生物膜反应器处理甾体雌激素的效能,建立了一套SPE/HPLC/MS/MS分析方法,对反应器进、出水中的甾体雌激素--甾酮(E1),17β-雌二醇(E2),雌三醇(E3)以及17α-乙炔基雌二醇(EE2)进行检测.该方法的加标回收率为88%~103%,精密度为4%~9%.该方法对E1,E2,E3和EE2的进水定量限(LOQ)分别为0.7,0.8,0.9和0.5 ng/L;对出水的定量限分别为2.0,1.0,2.0和 1.0 ng/L.CODCr和氨氮容积负荷最高为7.5和1.6 kg/(m3·d),出水依然能够保持稳定.进水pH稳定在9.0~10.5,而反应器的pH一直稳定在9.0以下,体系对pH变化造成的冲击比较适应.同时,反应器内形成了稳定的NO2--N积累,CODCr和氨氮的去除率分别达到了70%和73%. 相似文献