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101.
Won-Seok Yang Jang-Soo Lee Se-Won Park Jae-Jun Kang Tanvir Alam Yong-Chil Seo 《Journal of Material Cycles and Waste Management》2016,18(3):509-516
To recycle polyurethane foam waste generated from electric appliance recycling centers for use as fuel in a gasification process, polyurethane solid refuse fuel fabricated as pellets was analyzed for the characteristics of elemental composition, proximate analysis, heating value, and thermo-gravimetric testing. It has a high heating value of 29.06 MJ/kg with a high content of combustibles, which could be feasibly used in any thermal process. However, the nitrogen content, of up to 7 %, was comparably higher than for other fuels such as coal, biomass, and refuse-derived fuel, and may result in the emission of nitrogenous pollutant gases of HCN and NH3. By conducting gasification experiments on polyurethane solid refuse fuel in a fixed-bed reactor, a syngas with a heating value of 9.76 kJ/m3 and high content of both H2 and CO were produced with good gasification efficiency; carbon conversion 54 %, and cold gas efficiency 60 %. The nitrogenous pollutant gases in syngas were measured at the concentrations of 160 ppm hydrogen cyanide and 40 ppm ammonia, which may have to be reduced using proper cleaning technologies prior to the commercialization of gasification technology for polyurethane waste. 相似文献
102.
103.
Samsul Alam Dwaipayan Sengupta Ramen Kumar Kole Anjan Bhattacharyya 《Environmental monitoring and assessment》2013,185(12):9819-9824
Laboratory experiment was conducted to understand the persistence behavior of tetraconazole in three soils of West Bengal (alluvial, red lateritic, and coastal saline) and also in water maintained at three different pH (4.0, 7.0, and 9.2) conditions. Processed soil samples (100 g) were spiked at two treatment doses: 2.5 μg/g (T1) and 5.0 μg/g (T2). Double distilled buffered water (200 ml) was spiked at two treatment doses: 1.0 μg/ml (T1) and 2.00 μg/ml (T2). The tetraconazole dissipation followed first-order reaction kinetics and the residual half-life (T 1/2) values in soil were found to be in the range of 66.9–77.2 days for T1 and 73.4–86.0 days for T2. The persistence increased in the order red lateritic > new alluvial > coastal saline. Interestingly, the red lateritic soil exhibited the lowest pH (5.56) and organic carbon (0.52 %) content as compared to other two soils. However, the dissipation of tetraconazole in case of water was not pH dependant. The T 1/2 values in water were in the range of 94 to 125 days. The study indicated the persistent nature of tetraconazole in soil and water. 相似文献
104.
M.Anwar H.Khan M.M.Nazmul Hoque S.Shamsul Alam M.J.Ashfold Graham Nickless Dudley E.Shallcross 《环境科学学报(英文版)》2011,23(1)
Night-time OH levels have been determined for UK urban surface environments using two methods,the decay and steady state approximation methods.Measurement data from the UK National Environmental Technology Centre archive for four urban sites(Bristol,Harwell,London Eltham and Edinburgh) over the time period of 1996 to 2000 have been used in this study.Three reactive alkenes,namely isoprene,1,3-butadiene and trans-2-pentene were chosen for the calculation of OH levels by the decay method.Hourly measurements o... 相似文献
105.
Composite samples of unhatched and physically unaltered loggerhead sea turtle, Caretta caretta, eggs collected from 20 nests along northwest Florida were analyzed for organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), and metals. Chemical analyses revealed that turtle eggs contained detectable amounts of metals, PAHs, and PCBs. Only one OCP, p,p'-DDD, was detected, and its presence was restricted to eggs from two nesting sites. None of the PCB concentrations exceeded the Food and Drug Administration's (FDA) action limit. Concentrations of dioxin-like PCB congeners, 105, 118, and 126, and total PCBs were also detected and are contributors to the toxic burden of loggerhead sea turtle eggs. Concentrations of PAHs, 1,2,5,6-dibenzanthracene, 1-methyl naphthalene, C1-naphthalene and naphthalene were variable at nesting sites. Comparison of mean metal burdens in eggs from different beaches suggested that no uniform geographic gradients exist. Presence of OCPs, PCBs, PAHs and metals and their additive or synergistic toxicity is a concern to loggerhead sea turtle eggs; however, additive or synergistic impacts for loggerhead sea turtles are largely undocumented. 相似文献
106.
Kinetic adsorption of application of carbon nanotubes for Pb(Ⅱ) removal from aqueous solution 总被引:2,自引:0,他引:2
Nassereldeen A Kabbashi Muataz A Atieh Abdullah Al-Mamun Mohamed E S Mirghami MD Z Alam Noorahayu Yahya 《环境科学学报(英文版)》2009,(4)
The capability of carbon nanotubes (CNTs) to adsorb lead (Pb) in aqueous solution was investigated. Batch mode adsorption experiment was conducted to determine the effects of pH, agitation speed, CNTs dosage and contact time. The removal of Pb(Ⅱ) reached maximum value 85% or 83% at pH 5 or 40 mg/L of CNTs, respectively. Higher correlation coeffcients from Langmuir isotherm model indicates the strong adsorptions of Pb(Ⅱ) on the surface of CNTs (adsorption capacity Xm = 102.04 mg/g). The results indicates tha... 相似文献
107.
Rashidul Alam Mubarak A. Khan Ruhul A. Khan Sushanta Ghoshal M. I. H. Mondal 《Journal of Polymers and the Environment》2008,16(3):213-219
Chitosan films were prepared from dried prawn shell via chitin and then tensile properties like tensile strength (TS) and
elongation at break (Eb) of the films were evaluated. Six formulations were developed using methyl methacylate (MMA) monomer
and aliphatic urethane diacrylate oligomer (M-1200) in methanol along with photoinitator (Darocur-1664). Then the films were
soaked in the formulations and irradiated under UV radiation at different doses for the improvement of physico-mechanical
properties of chitosan films. The cured films were characterized by measuring TS, Eb, polymer loading (PL), water absorption
and gel content properties. The formulation containing 43% MMA and 15% oligomer in methanol solution showed the best performance
at 20th UV pass for 4 min soaking time. 相似文献
108.
Alam Md. Asraful Wan Chun Tran Dang Thuan Mofijur M. Ahmed Shams Forruque Mehmood Muhammad Aamer Shaik Feroz Vo Dai-Viet N. Xu Jingliang 《Environmental Chemistry Letters》2022,20(2):1153-1168
Environmental Chemistry Letters - Microalgae are photosynthetic cell factories of global interest for fuels, food, feed, bioproducts, carbon sequestration, waste mitigation, and environmental... 相似文献
109.
Billah Md Masum Bhuiyan Md Khurshid Alam Islam Mohammad Ahsanul Das Jewel Hoque ATM Rafiqul 《Environmental science and pollution research international》2022,29(11):15347-15363
Environmental Science and Pollution Research - Coastal wetlands including salt marshes are among the most productive ecosystems on Earth. They are known for improving the quality of coastal water... 相似文献
110.
Aftab Alam Khan 《Environmental Hazards》2018,17(4):276-291
ABSTRACTEarthquakes occur in and around active lithospheric-plate margins that are located both in diverging and converging plate-settings. New fault rupture or old active fault reactivation can cause ground shaking, land deformation, land subsidence, landslides, and mass avalanches. The relevant locations of major risk centres around the world are well known. However, the parameters such as trend, pattern, frequency and magnitude are highly variable and very difficult to determine and predict. One result is that many fundamental and universal scientific achievements for mitigating earthquake hazard have often failed in protecting and safe-guarding human life and property. Although naturally occurring events cannot be prevented nevertheless loss of life and property damage could be minimized if an integrated effort and using the wisdom of the relevant professionals are practiced. A paradigm shift of the culture from post-disaster relief and rehabilitation to pre-disaster preparation and practice would reduce the level of destruction from an impending earthquake. Requisite pre-disaster physical planning and appropriate building measures, and pre- and post-disaster risk management should give special attention to public awareness programmes for loss mitigation. However, the fundamental requirement for such achievement is dedicated approach and commitment from the planner, practitioners and end-users of risk mitigation actions. 相似文献