全文获取类型
收费全文 | 241篇 |
免费 | 4篇 |
国内免费 | 5篇 |
专业分类
安全科学 | 12篇 |
废物处理 | 28篇 |
环保管理 | 19篇 |
综合类 | 27篇 |
基础理论 | 26篇 |
污染及防治 | 94篇 |
评价与监测 | 29篇 |
社会与环境 | 13篇 |
灾害及防治 | 2篇 |
出版年
2023年 | 3篇 |
2022年 | 32篇 |
2021年 | 17篇 |
2020年 | 14篇 |
2019年 | 6篇 |
2018年 | 7篇 |
2017年 | 10篇 |
2016年 | 9篇 |
2015年 | 8篇 |
2014年 | 15篇 |
2013年 | 33篇 |
2012年 | 7篇 |
2011年 | 13篇 |
2010年 | 8篇 |
2009年 | 4篇 |
2008年 | 10篇 |
2007年 | 12篇 |
2006年 | 9篇 |
2005年 | 1篇 |
2004年 | 4篇 |
2003年 | 7篇 |
2002年 | 6篇 |
2000年 | 1篇 |
1999年 | 2篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1988年 | 2篇 |
1984年 | 1篇 |
1982年 | 1篇 |
1978年 | 1篇 |
1963年 | 1篇 |
排序方式: 共有250条查询结果,搜索用时 46 毫秒
61.
Mehmet Kanoglu Ibrahim Dincer Yunus A. Cengel 《Environment, Development and Sustainability》2009,11(5):971-988
In this paper, some key aspects and definitions of exergy are presented, and practical examples are given in order to highlight
its usefulness in design, analysis and performance improvement for various types of energy processes for better environment
and sustainable development. The relations between exergy, sustainability and environmental impact are illustrated to show
how improving the performance of the process through exergy efficiency affects the environmental impact and sustainable development.
Both exergy and energy efficiencies for various systems/processes are also studied for comparison purposes. 相似文献
62.
Long-term monitoring data show that hard coral cover on the Great Barrier Reef (GBR) has reduced by >70 % over the past century. Although authorities and many marine scientists were in denial for many years, it is now widely accepted that this reduction is largely attributable to the chronic state of eutrophication that exists throughout most of the GBR. Some reefs in the far northern GBR where the annual mean chlorophyll a (Chl a) is in the lower range of the proposed Eutrophication Threshold Concentration for Chl a (~0.2–0.3 mg m−3) show little or no evidence of degradation over the past century. However, the available evidence suggests that coral diseases and the crown-of-thorns starfish will proliferate in such waters and hence the mandated eutrophication Trigger values for Chl a (~0.4–0.45 mg m−3) will need to be decreased to ~0.2 mg m−3 for sustaining coral reef communities. 相似文献
63.
Usman Muhammad Murtaza Behzad Natasha Natasha Imran Muhammad Abbas Ghulam Amjad Muhammad Shahid Muhammad Ibrahim Sobhy M. Owens Gary Murtaza Ghulam 《Environmental monitoring and assessment》2022,194(2):1-30
Environmental Monitoring and Assessment - Few estuaries remain unaffected by water management and altered freshwater deliveries. The Caloosahatchee River Estuary is a perfect case study for... 相似文献
64.
Kardi Seyedeh Nazanin Ibrahim Norahim Rashid Noor Aini Abdul Darzi Ghasem Najafpour 《Environmental science and pollution research international》2019,26(21):21201-21215
Environmental Science and Pollution Research - One of the biggest challenges of using single-chamber microbial fuel cells (MFCs) that utilize proton-exchange membrane (PEM) air cathode for... 相似文献
65.
Patrick Manu Anush Poghosyan Ibrahim Mark Mshelia Samuel Tekena Iwo Abdul-Majeed Mahamadu Krzysztof Dziekonski 《International journal of occupational safety and ergonomics》2019,25(1):99-109
Purpose. Design for safety (DfS) of workers is amongst the prominent ways of tackling poor occupational safety and health performance in construction. However, in developing countries there is extremely limited research on DfS. This study thus makes an important contribution to the subject of DfS in developing countries by specifically examining the awareness and practice of DfS amongst architects within the construction sector of Nigeria. Materials and methods. A survey of architects, yielding 161 valid responses, was conducted. Results. While there is high awareness of the concept of DfS, the actual practice is low. Additionally, although there is high interest in DfS training, the engagement in DfS training is low. Significantly, awareness of DfS, training and education related to DfS, and membership of a design professional body have very limited bearing on the practice of DfS by architects. Conclusions. The findings are thus symptomatic of the prevalence of influential DfS implementation barriers within the construction sector. Industry stakeholders should seek to raise the profile of DfS practice within the sector. Furthermore, similar empirical studies in the construction sector of other developing countries would be useful in shedding light on the status of DfS in these countries. 相似文献
66.
Preparation and Properties of Carboxymethyl Cellulose (CMC)/Sodium alginate (SA) Blends Induced by Gamma Irradiation 总被引:1,自引:0,他引:1
Carboxymethyl Cellulose (CMC)/Sodium alginate (SA) blends have been prepared by casting solution method. The effect of different irradiation doses (2.5, 5, 10, 15, and 20 kGy) of gamma rays on the physical properties of the CMC/SA blend containing different ratios of SA (20, 30, and 40 %) such as gel fraction (%) and swelling (%) of CMC/SA blends were investigated. It was found that the gel fraction increases with increasing irradiation dose up to 20 kGy while the swelling of CMC/SA blend films tends to increase with increasing SA content and reduced with increasing irradiation doses. Mechanical and thermal properties of the blend films were improved when CMC content increased and with increasing irradiation dose up to 20 kGy. Morphology of the blend was examined by SEM, which indicates compatibility between CMC and SA. The blend rich in SA content possessed good antimicrobial activity against Gram +ve Bacteria (Bacillus subtilis). 相似文献
67.
Farenhorst A Reimer M Londry K Saiyed I 《Journal of environmental science and health. Part. B》2006,41(5):509-522
The application of municipal biosolid or liquid hog manure to agricultural soils under laboratory conditions at 20 degrees C influenced the fate of the herbicide 2,4-D [2,4-(dichlorophenoxy)acetic acid] in soil. When 2,4-D was added to soil at agronomic rates immediately after the addition of manure or biosolids to a coarse-textured soil, the percentage of 2,4-D mineralized at 100 days was about 47% for both treatments, compared to only 31% for control soils without amendments. The enhanced 2,4-D mineralization as a result of amendment addition was due to an increased heterotrophic microbial activity, with the greatest increases in soil respiration occurring for soils amended with biosolids. When additions of 2,4-D were delayed for one, two, or four weeks after the amendments were applied, the additions of amendments generally reduced 2,4-D mineralization in soil, particularly for manure, indicating that the effect of amendments on enhancing soil microbial activities diminished over time. In contrast, the mineralization of 2,4-D in control soils was less dependent on when 2,4-D was applied in relation to pre-incubations of soil for zero, one, two, or four weeks. The effect of manure on decreasing 2,4-D mineralization in specific soils was as large as the effect of soil texture on differences in 2,4-D mineralization across soils. Because manure was not found to impact 2,4-D sorption by soil, it is possible that 2,4-D mineralization decreased because 2,4-D transformation products were strongly sorbed onto organic carbon constituents in manure-amended soils and were therefore less accessible to microorganisms. Alternatively, microorganisms were less likely to metabolize the herbicide because they preferentially consumed the type of organic carbon in manure that is a weak sorbent for 2,4-D. 相似文献
68.
Heavy metal removal and cyanide destruction in the metal plating industry: an integrated approach from egypt 总被引:1,自引:0,他引:1
Wastewater produced from a metal plating is a major environmental problem. Industrial auditing revealed that the main source
of pollution mainly originated from rinsing water. The characterization of final effluent showed that it is highly contaminated
with hazardous heavy metals and cyanide. The concentration of copper, hexavalent chromium, nickel, and cyanide in the rinsing
water of metal plating department was 14.8, 40.9, 13.3, and 19 mg/l, respectively. The concentration of cyanide and zinc from
the galvanizing department reached 60 and 80 mg/l. The remediation scheme included the application of in-plant control measures
via changing the rinsing process followed by the destruction of cyanide and reduction of hexavalent chromium bearing wastes.
The pretreated wastes were then mixed with other industrial wastes prior to a combined chemical coagulation-sedimentation
using lime and/or lime in combination with ferric chloride. The results indicated that, after applying the waste minimization
measures alone at the source, prior to final treatment of industrial waste, removal rates of cyanide, copper, nickel, and
chromium concentrations were 23.2%, 14.9%, 32.3%, and 55.3%, respectively in the rinse water from metal plating department.
Furthermore, the removal rates of cyanide and zinc in the galvanizing department reached 59.7% and 24.3. The integrated control
measures and treatment scheme led to more than 99% removal of copper, nickel, chromium, and zinc, while the complete removal
of cyanide was achieved in the final effluent. 相似文献
69.
Bani I 《Disasters》2007,31(Z1):S139-S149
This paper uses a public health approach to examine briefly: (a) the progress of universal salt iodisation (USI) in Sudan; (b) the roles of the main actors involved; and (c) the main issues around accelerating USI. The literature, especially that coming from the UN agencies, is analysed and experiences from the recently revitalised USI programme, and related relevant meetings, are distilled. In Sudan the prevalence of goitre is 22 per cent. It is assumed that productivity among the people affected is reduced by 5-25 per cent. Little apparent progress has been made with USI. The Government of Sudan, UN multilateral agencies, international consultative groups, bilateral agencies, global and national non-governmental organisations and, increasingly, the private sector must work together to find innovative approaches to increase awareness of the broader social, public health and nutritional contexts, and to advocate for increased national nd international funding. 相似文献
70.
In urban cities, the environmental services are the responsibility of the public sector, where piped water supply is the norm
for urban household. Likewise, in Beirut City (capital of Lebanon) official water authorities are the main supplier of domestic
water through a network of piping system that leaks in many areas. Beirut City and its suburbs are overpopulated since it
is the residence of 1/3 of the Lebanese citizens. Thus, Beirut suffers deficiency in meeting its water demand. Water rationing,
as a remedial action, is firmly established since four decades by the Lebanese Water Authorities. Consumers resorted then
to private wells to supplement their domestic water needs. Consequently, household water quality is influenced by external
factors relating to well water characteristics and internal factors depending on the types of the pipes of the distribution
network and cross connections to sewer pipes. These factors could result in chemical and microbial contamination of drinking
water. The objective of this study is to investigate domestic water quality variation in Beirut City emerging form the aforementioned
factors. The presented work encircles a typical case study of Beirut City (Ras Beirut). Results showed deterioration pattern
in domestic water quality. The predicted metal species and scales within the water pipes of distribution network depended
on water pH, hardness, sulfate, chloride, and iron. The corrosion of iron pipes mainly depended on Mg hardness. 相似文献