全文获取类型
收费全文 | 731篇 |
免费 | 2篇 |
专业分类
安全科学 | 83篇 |
废物处理 | 29篇 |
环保管理 | 15篇 |
综合类 | 67篇 |
基础理论 | 86篇 |
污染及防治 | 304篇 |
评价与监测 | 100篇 |
社会与环境 | 48篇 |
灾害及防治 | 1篇 |
出版年
2023年 | 10篇 |
2022年 | 14篇 |
2021年 | 19篇 |
2020年 | 9篇 |
2019年 | 33篇 |
2018年 | 35篇 |
2017年 | 42篇 |
2016年 | 58篇 |
2015年 | 15篇 |
2014年 | 49篇 |
2013年 | 122篇 |
2012年 | 32篇 |
2011年 | 40篇 |
2010年 | 16篇 |
2009年 | 15篇 |
2008年 | 29篇 |
2007年 | 30篇 |
2006年 | 18篇 |
2005年 | 17篇 |
2004年 | 24篇 |
2003年 | 25篇 |
2002年 | 14篇 |
2001年 | 6篇 |
2000年 | 8篇 |
1999年 | 4篇 |
1997年 | 3篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1991年 | 2篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1984年 | 2篇 |
1982年 | 2篇 |
1979年 | 2篇 |
1973年 | 1篇 |
1968年 | 1篇 |
1967年 | 1篇 |
1965年 | 3篇 |
1964年 | 1篇 |
1963年 | 4篇 |
1962年 | 4篇 |
1961年 | 3篇 |
1960年 | 3篇 |
1959年 | 1篇 |
1958年 | 1篇 |
1938年 | 1篇 |
1931年 | 1篇 |
排序方式: 共有733条查询结果,搜索用时 62 毫秒
651.
Treatment of high-ammonium anaerobic digester supernatant by aerobic granular sludge and ultrafiltration processes 总被引:1,自引:0,他引:1
Agnieszka Cydzik-Kwiatkowska Magdalena Zielińska Katarzyna Bernat Irena Wojnowska-Baryła Tomasz Truchan 《Chemosphere》2013,90(8):2208-2215
Anaerobic sludge digester supernatant characterized by 569 mg TKN L?1, high color and a COD/N ratio of 1.4 was treated in granular sequencing batch reactors (GSBRs) followed by post-denitrification (P-D) and ultrafiltration (UF) steps. The use of granular sludge allowed for the oxidation of ammonium in anaerobic digester supernatant at all investigated GSBR cycle lengths of 6, 8 and 12 h. The highest ammonium removal rate (15 mg N g?1 VSS h?1) with removal efficiency of 99% was noted at 8 h.Since the GSBR effluent was characterized by a high concentration of nitrites, slowly-degradable substances and biomass, additional purification steps were applied. In P-D stage, the microbial activity of granular biomass in the GSBR effluent was implemented. The P-D was supported by external carbon source addition and the most advantageous variant comprised dosing of half of the theoretical acetate dose for nitrite reduction in the 3-h intervals. The use of the system consisting of the GSBR with 8 h, an optimal P-D variant and a UF for the treatment of anaerobic digester supernatant allowed for the 99%, 71% and 97% reductions of TKN, COD and color, respectively. 相似文献
652.
653.
654.
Katarzyna A. Wolny-Koładka 《Journal of environmental science and health. Part. B》2013,48(11):864-870
This study aimed to determine the susceptibility of Fusarium spp. strains isolated from cereals to selected heavy metals, fungicides and silver nanoparticles. The experiments were conducted using 50 Fusarium strains belonging to five species: F. graminearum, F. culmorum, F. oxysporum, F. sporotrichioides and F. avenaceum. The strains were found to be highly resistant to Pb2+ and Zn2+. Medium resistance to Cu2+ and Mn2+ and low resistance to Cd2+ and Fe3+ was also observed. Among the tested fungicides, formulations containing azoxystrobin, prochloraz and tebuconazole proved to be the most effective in inhibiting the growth of fungi, as they affected fungal growth in each of the applied doses. Susceptibility of Fusarium spp. to nanosilver, demonstrated in this study, shows the legitimacy of using nanostructures as fungicidal agents. The results confirm high diversity of the analyzed fungal species in terms of susceptibility to the tested substances, and encourage to continue research on the resistance of Fusarium spp. to various fungicidal agents. 相似文献
655.
Behavior of pyrimethanil,pyraclostrobin, boscalid,cypermethrin and chlorpyrifos residues on raspberry fruit and leaves of Laszka variety 总被引:1,自引:0,他引:1
Stanisław Sadło Ewa Szpyrka Michał Stawarczyk Bartosz Piechowicz 《Journal of environmental science and health. Part. B》2013,48(3):159-168
The purpose of the research conducted was to investigate and evaluate the behavior of pyrimethanil, pyraclostrobin, boscalid, cypermethrin and chlorpyrifos, the active ingredients of selected fungicides and insecticides, on ripe fruit and in fully developed leaves of raspberry of the Laszka variety. The field trial was carried out in the period of one month starting from the first fruit picking. The results obtained indicated that residue levels on the day of the first crop picking did not even approximate the corresponding EU-MRLs (http://ec.europa.eu/sanco_pesticides). Individual substances in raspberry fruits and leaves disappeared at a similar rate. As a result of chlorpyrifos application to the soil, its residue in fruits and leaves occurred for the whole period of fruit bearing, though in fruit they dropped successively. To produce raspberries with residues below or equal to 0.01 μg g?1, the application of pesticides should be stopped at least 2–3 weeks before the first crop picking, and on condition that an appropriate preparation (active in low doses) is applied to the last treatments. 相似文献
656.
Małgorzata Wiśniewska Katarzyna Szewczuk-Karpisz 《Environmental science and pollution research international》2013,20(6):3657-3669
The lack of water is the most serious threat to humanity that leads to more efficient water and sewage treatment. Currently, many scientists are looking for new coagulants, flocculants and physicochemical methods allowing for sufficient removal of pollutants from water. The presence of various types of pigments, including chromium (III) oxide, poses the major problem. Even small amounts of these substances inhibit life processes in water. In this paper, the stability of Cr2O3 suspension in the absence and the presence of polyacrylic acid (PAA) was determined. To explain the changes in the system stability, the adsorption and electrokinetic measurements were performed. The chromium (III) oxide suspension not containing PAA is the most stable at pH?=?3. Under these conditions, each positively charged solid particle is surrounded by a negatively charged diffusion layer which protects from particle collision and aggregates formation (electrostatic stabilization). In turn, the Cr2O3 suspension containing the PAA is most unstable also at pH?=?3. In this case, the polymer causes destabilization of the colloidal suspension, which results from charge neutralization of solid particles by adsorbed PAA. 相似文献
657.
Wielgosiński G 《Journal of the Air & Waste Management Association (1995)》2011,61(5):511-526
The first reports that it is possible to emit dioxins from the heat and power generation sector are from the beginning of the 1980s. Detailed research proved that the emission of dioxins might occur during combustion of hard coal, brown coal, and furnace oil as well as coke-oven gas. The emission of dioxins occurs in wood incineration; wood that is clean and understood as biomass; or, in particular, wood waste (polluted). This paper thoroughly discusses the mechanism of dioxin formation in thermal processes, first and foremost in combustion processes. The parameters influencing the quantity of dioxins formed and the dependence of their quantity on the conditions of combustion are highlighted. Furthermore, the methods of reducing dioxin emissions from combustion processes (primary and secondary) are discussed. The most efficacious methods that may find application in the heat and power generation sector are proposed; this is relevant from the point of view of the implementation of the Stockholm Convention resolutions in Poland with regard to persistent organic pollutants. 相似文献
658.
The spectroscopic studies of humic acid extracted from sediment collected at different seasons 总被引:1,自引:0,他引:1
Gocza?kowice Reservoir is the biggest water reservoir in the south of Poland. For our studies bottom sediments were collected from eight different places of the reservoir at various seasons of the year.EPR spectroscopy was applied to analyse both quantitatively and qualitatively the humic acids (HA) present in the samples. EPR spectra of the extracted HA exhibited broad lines from the paramagnetic metal ions and narrow lines from free radicals. The values of the free radical concentration obtained for HA amounted to 1.14-13.6 × 1016 spin g−1 depending on the season and the place of sample collection. The values of the g factor obtained for HA were of the range 2.0027-2.0035.The EPR studies show that HA extracted from bottom sediment collected at various points of the Gocza?kowice Reservoir exhibit similar physical-chemical properties. It was also observed that the depth of the reservoir affects the content of the oxygen functional groups as well as the free radical concentration in HA.The identification of the functional groups was done by means of IR. UV/VIS spectroscopy was used to estimate the maturity of the HA. 相似文献
659.
The subject of this study was to develop a method of simultaneous determination of PCDDs/PCDFs and HCB in exhaust gases from industrial installations. Sampling to determine PCDDs/PCDFs was conducted using the method described in PN-EN 1948-1: 2006, where the sorption material is polyurethane foam (PUF). In order to simultaneously collect PCDDs/PCDFs and HCB and to avoid sorbent bed breakthrough, it was necessary to apply an additional polyurethane sorption layer. Twenty-seven samples of exhaust gases from various cement plants and 40 samples of exhaust gases from hospital and industrial waste incineration plants collected in 2009/2010 in the entire territory of Poland were examined. The average content of PCDDs/Fs in samples from cement plants amounted to 0.076 ng I-TEQ N m(-3) (range of 0.002-0.62 ng I-TEQ N m(-3)), while the average content of HCB amounted to 10 ng N m(-3) (range of 0.98-60.5 ng N m(-3)). In the case of samples collected from waste incineration plants, the average concentration of PCDDs/Fs was 0.39 ng I-TEQN m(-3) (range of 0.002-5.68 ng I-TEQ N m(-3)). In the case of HCB, the average concentration was 238 ng N m(-3) (range of 3.21-2500 ng N m(-3)). Also, the interdependence of the concentration of PCDDs/PCDFs and HCB was determined in the analysed samples, with the ranges of low and high content of PCDDs/PCDFs being examined separately. In all cases, the determined values of the r correlation coefficient were within the range of 0.7-1.0, which indicates a good correlation between the concentrations of PCDDs/PCDFs and HCB. 相似文献
660.
Strumińska-Parulska DI Skwarzec B Fabisiak J 《Journal of environmental radioactivity》2011,102(12):1105-1111
The aim of the paper was plutonium (238Pu and 239+240Pu) determination in seabirds, permanently or temporarily living in northern Poland at the Baltic Sea coast. Together 11 marine birds species were examined: 3 species permanently residing in the southern Baltic, 4 species of wintering birds and 3 species of migrating birds. The obtained results indicated plutonium is non-uniformly distributed in organs and tissues of analyzed seabirds. The highest plutonium content was found in the digestion organs and feathers, the smallest in skin and muscles. The plutonium concentration was lower in analyzed species which feed on fish and much higher in herbivorous species. The main source of plutonium in analyzed marine birds was global atmospheric fallout. 相似文献