全文获取类型
收费全文 | 129篇 |
免费 | 2篇 |
国内免费 | 4篇 |
专业分类
安全科学 | 2篇 |
废物处理 | 6篇 |
环保管理 | 11篇 |
综合类 | 20篇 |
基础理论 | 12篇 |
污染及防治 | 60篇 |
评价与监测 | 18篇 |
社会与环境 | 4篇 |
灾害及防治 | 2篇 |
出版年
2022年 | 1篇 |
2021年 | 2篇 |
2020年 | 2篇 |
2018年 | 3篇 |
2017年 | 1篇 |
2016年 | 2篇 |
2015年 | 2篇 |
2014年 | 2篇 |
2013年 | 14篇 |
2012年 | 8篇 |
2011年 | 6篇 |
2010年 | 7篇 |
2009年 | 6篇 |
2008年 | 1篇 |
2007年 | 10篇 |
2006年 | 10篇 |
2005年 | 8篇 |
2004年 | 7篇 |
2003年 | 4篇 |
2002年 | 2篇 |
2001年 | 6篇 |
2000年 | 7篇 |
1999年 | 2篇 |
1998年 | 2篇 |
1997年 | 9篇 |
1996年 | 1篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1991年 | 3篇 |
1987年 | 1篇 |
1985年 | 1篇 |
1976年 | 1篇 |
排序方式: 共有135条查询结果,搜索用时 0 毫秒
121.
Chou MS Cheng WH Lee WS 《Journal of the Air & Waste Management Association (1995)》2000,50(12):2112-2119
A pilot apparatus of a regenerative catalytic oxidizer (RCO) equipped with two electrical heaters and two 20-cm i.d. x 200-cm height regenerative beds was used to treat methyl ethyl ketone (MEK) and toluene, respectively, in an airstream. The regenerative beds were packed with gravel (approximate particle size 1.25 cm, specific area 205 m2/m3, and specific heat capacity 840 J/kg degree C) as a solid regenerative material and K-type thermal couples for measuring solid and gas temperatures, respectively. The catalyst bed temperature was kept around 400 degrees C and the gas superficial velocity was operated at 0.234 m/sec. This investigation measured and analyzed distributions of solid and gas temperatures with operating time and variations of volatile organic compound (VOC) concentrations in the regenerative beds. The overall VOC removal efficiency exceeded 98% for MEK and 95% for toluene. Degradation of VOCs will exist for MEK on the surface of solid material (gravel) in the temperature range of 330-400 degrees C, but toluene does not exhibit this phenomenon. 相似文献
122.
Nigel K.C. Goh Maylene G.K. Loo L.M. Chou 《Environmental monitoring and assessment》1997,44(1-3):81-89
Zonation patterns of gorgonians from 15 sites on reefs south of the main island of Singapore reveal discontinuities in terms of both generic richness and total abundance. This establishes the crest, slope, and bottom as ecologically distinct environments of the reef, as interpreted by these gorgonian population parameters. Only members of the family Melithaeidae are able to colonise all three zones. Other genera are restricted to the slope and bottom; in particular, Acanthogorgia and Echinomuricea are only found at the bottom zone. 相似文献
123.
Jan‐Tai Kuo Wen‐Cheng Liu Ruey‐Tyng Lin Wu‐Seng Lung Ming‐Der Yang Chou‐Ping Yang Show‐Chyuan Chu 《Journal of the American Water Resources Association》2003,39(3):671-687
ABSTRACT: Field data collected from the Feitsui Reservoir in Taiwan indicate that the water is at a stage between mesotrophic and eutrophic. Recent measurements such as total phosphorus, chlorophyll a and Secchi depth levels suggest that the water quality has been declining. A two‐dimensional, laterally averaged, finite difference hydrodynamic and water quality model was used to simulate the water quality in the Feitsui Reservoir in an effort to determine sound water quality management strategies. The model was calibrated and verified using data collected in 1996 and 1997. The calibrated model was used to simulate algal biomass (in terms of chlorophyll a) levels under various wasteload reduction scenarios. Model results show that 50 percent reduction of the total phosphorus load will improve the existing water quality, shifting the trophic status from eutrophic/mesotrophic to oligotrophic. The modeling effort has yielded valuable information that can be used by decision makers for the evaluation of different management strategies of reducing watershed nutrient loads. 相似文献
124.
Continuous measurements of hourly PM10 soluble ions were performed by the in situ IC technology in order to assess the impact of Asian outflows on local air quality. The intensive aerosol observation was carried in Taipei from 11 February 22:00 to 7 April 19:00, 2004. Concentrations of the water-soluble ions (Cl(-), NO(-)(2), NO(-)(3), SO(2-)(4), Na(+), NH(+)(4), K(+), and Ca(2+)) were measured in a total of 3,300 samples. The characteristics of air pollutant events in Taipei Basin were classified as frontal dust, dust, northeast monsoon, south wind and sea/land breeze according to the hourly meteorology and air pollutant concentrations. Factor analysis was conducted based on hourly data for 13 variables to find the group of variables with similar behavior. According to the source characteristics of high loading species, the possible sources of PM10 aerosols in each group were identified. Three to four factors were identified for each event. The total variances of frontal dust, dust, northeast trade, south wind, and sea/land breeze events were explained about 85%, 86%, 76%, 77%, and 80%, respectively, indicating that the identified factors were satisfactory. 相似文献
125.
126.
陈祝青 《湖南环境生物职业技术学院学报》1997,(1)
水濂洞是南岳风景区系中的一个重要组成部分,本文就水濂洞景区的规划、设计和建筑提出了一些看法。指出在设计时,要重点突出:静、险、古、幽、奇五个特点。 相似文献
127.
Beauchemin S Hesterberg D Chou J Beauchemin M Simard RR Sayers DE 《Journal of environmental quality》2003,32(5):1809-1819
Knowledge of phosphorus (P) species in P-rich soils is useful for assessing P mobility and potential transfer to ground water and surface waters. Soil P was studied using synchrotron X-ray absorption near-edge structure (XANES) spectroscopy (a nondestructive chemical-speciation technique) and sequential chemical fractionation. The objective was to determine the chemical speciation of P in long-term-fertilized, P-rich soils differing in pH, clay, and organic matter contents. Samples of three slightly acidic (pH 5.5-6.2) and two slightly alkaline (pH 7.4-7.6) soils were collected from A or B horizons in two distinct agrosystems in the province of Québec, Canada. The soils contained between 800 and 2100 mg total P kg(-1). Distinct XANES features for Ca-phosphate mineral standards and for standards of adsorbed phosphate made it possible to differentiate these forms of P in the soil samples. The XANES results indicated that phosphate adsorbed on Fe- or Al-oxide minerals was present in all soils, with a higher proportion in acidic than in slightly alkaline samples. Calcium phosphate also occurred in all soils, regardless of pH. In agreement with chemical fractionation results, XANES data showed that Ca-phosphates were the dominant P forms in one acidic (pH 5.5) and in the two slightly alkaline (pH 7.4-7.6) soil samples. X-ray absorption near-edge structure spectroscopy directly identified certain forms of soil P, while chemical fractionation provided indirect supporting data and gave insights on additional forms of P such as organic pools that were not accounted for by the XANES analyses. 相似文献
128.
H.W. Ou M.L. Fang M.S. Chou T.F. Shiao 《Journal of the Air & Waste Management Association (1995)》2020,70(6):641-648
ABSTRACT
In this study, granular activated carbon (GAC) was used as an adsorbent for biogas desulfurization. Biogas containing 932–2,350 ppm of H2S was collected from an anaerobic digester to treat the wastewater from a dairy farm with about 200 cows. An adsorption test was performed by introducing the biogas to a column that was packed with approximately 50 L of commercial GAC. The operation ceased if the effluent gas had an H2S concentration of over 100 ppm. The GAC was replaced by a given weight of new GAC in a subsequent test. According to the results, for H2S concentrations in the range of 932–1,560 ppm (average±SD = 1,260 ± 256 ppm), 1 kg of the GAC yielded biogas treatment capacities of 568 ± 112 m3 and H2S adsorption capacities of 979 ± 235 g. For the higher influent H2S concentrations of 2,110 ± 219 ppm, the biogas treatment and H2S-adsorption capacities decreased to 229 ± 18 m3 and 668 ± 47 g, respectively. An estimation indicated a requisite cost of US$16.5 for the purification of 1,000 m3 of biogas containing 2,110 ppm of H2S. This cost is approximately 5% of US$330, the value of 1,000 m3 of biogas. 相似文献
129.
Daniel Michael Evan Dresel Charissa Chou Chris Murray Dick Gilbert Brent Pulsipher 《补救:环境净化治理成本、技术与工艺杂志》2000,10(2):19-44
Groundwater monitoring at Department of Energy's (DOE's) Hanford Site is a large, expensive undertaking serving multiple purposes, including compliance with regulations and DOE orders, remediation efforts under CERCLA, and sitewide risk evaluations. Like most large Federal facilities, the monitoring program currently in place has evolved and grown overtime as new requirements were established and groups were assigned to address them. DOE and its regulators simultaneously awakened to the fact that there was a need to reevaluate the monitoring activities at Hanford, to better integrate the program, to avoid duplicative sampling, to improve everyone's understanding of the performance of the network, and to evaluate whether adequate data could be collected for lower cost. This paper describes the approch that was developed to guide the rethinking effort with direct and extensive involvement of DOE, EPA, Washington Department of Ecology, Indian Tribes, and DOE Contractors, and how this approach was applied to a large portion of the site. Both the human element of the process (cultural change), as well as some of the technical details associated with the effort, including a flexible application of EPA's data quality objectives process, are discussed. 相似文献
130.
Strategic 3-hydroxy-2-butanone release in the dominant male lobster cockroach, <Emphasis Type="Italic">Nauphoeta cinerea</Emphasis> 总被引:2,自引:1,他引:2
In the lobster cockroach Nauphoete cinerea, the dominant–subordinate hierarchy formed via the agonistic interactions is unstable, and changes in rank order are common.
Our previous results showed that in the first encounter fight during initial rank formation, microgram levels of 3H-2B are
released by the aggressive posture (AP)-adopting dominant male. In the present study, the pattern of daily pheromone (3H-2B)
release during the domination period and on the day of rank switch, rank duration, and rank switch frequency were investigated
in three-male groups and six-male groups to examine the effect of higher frequency of agonistic encounters. The results showed
that, in the three-male groups (50-day observation period), daily 3H-2B release rate was not constant, but fluctuated, the
average duration of dominant rank was 16.6 ± 2.0 days, rank switch occurred in 58.8% of groups, and the frequency of rank
switching (average number of rank switches/group/50 days) was 1.4 ± 0.2. For the six-male groups (30-day observation period),
the daily 3H-2B release rate also fluctuated, but the duration of dominant rank was significantly shorter at 4.2 ± 0.6 days,
rank switch occurred in 100% of groups, and the frequency of rank switching (average number of rank switches/group/30 days)
was significantly higher at 6.9 ± 0.6. The results for both sets of male groups showed that as a new rank formed (either on
the first encounter day or on the day of rank switching), the dominant status was significantly associated with a higher 3H-2B
release rate. In the animal kingdom, fighting usually involves communication or the exchange of signals, and the results of
this study indicated that the fluctuating daily 3H-2B release rate adopted by the dominants is a kind of strategic release
and the 3H-2B release rate is a signal used to determine dominance. 相似文献