全文获取类型
收费全文 | 94篇 |
免费 | 3篇 |
专业分类
安全科学 | 2篇 |
废物处理 | 6篇 |
环保管理 | 16篇 |
综合类 | 13篇 |
基础理论 | 31篇 |
污染及防治 | 19篇 |
评价与监测 | 5篇 |
社会与环境 | 3篇 |
灾害及防治 | 2篇 |
出版年
2023年 | 2篇 |
2022年 | 1篇 |
2021年 | 1篇 |
2020年 | 1篇 |
2019年 | 2篇 |
2018年 | 3篇 |
2017年 | 2篇 |
2016年 | 1篇 |
2015年 | 3篇 |
2014年 | 4篇 |
2013年 | 8篇 |
2012年 | 5篇 |
2011年 | 3篇 |
2009年 | 4篇 |
2008年 | 2篇 |
2007年 | 4篇 |
2006年 | 3篇 |
2005年 | 4篇 |
2004年 | 1篇 |
2003年 | 9篇 |
2002年 | 1篇 |
2001年 | 2篇 |
2000年 | 1篇 |
1999年 | 2篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1994年 | 5篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1991年 | 4篇 |
1988年 | 1篇 |
1984年 | 1篇 |
1983年 | 2篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1979年 | 2篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1972年 | 1篇 |
排序方式: 共有97条查询结果,搜索用时 15 毫秒
1.
Although the use of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) has been prohibited in Singapore since 1980, OCPs and PCBs still can be detected in the environment and represent a potential threat to public health. In this study, OCPs and PCBs were measured in house dust samples collected from 31 homes across the island-state of Singapore. Organochlorine pesticides, such as hexachlorocyclohexanes (HCHs), chlordanes and dichlorodiphenyltrichloroethanes (DDTs) were tested, with a range of 相似文献
2.
Partitioning and removal of dioxin-like congeners in flue gases treated with activated carbon adsorption 总被引:4,自引:0,他引:4
Activated carbon adsorption is commonly used to control dioxin-like congener (PCDD/Fs and PCBs) emissions. Partitioning of PCDD/Fs and PCBs between vapor and solid phases and their removal efficiencies achieved with existing air pollution control devices (APCDs) at a large-scale municipal waste incinerator (MWI) and an industrial waste incinerator (IWI) are evaluated via intensive stack sampling and analysis. Those two facilities investigated are equipped with activated carbon injection (ACI) with bag filter (BF) and fixed activated carbon bed (FACB) as major PCDD/F control devices, respectively. Average PCDD/F and PCB concentrations of stack gas with ACI+BF as APCDs are 0.031 and 0.006ng-TEQ/Nm(3), and that achieved with FACB are 1.74 and 0.19ng-TEQ/Nm(3) in MWI and IWI, respectively. The results show that FACB could reduce vapor-phase PCDD/Fs and PCBs concentrations in flue gas, while the ACI+BF can effectively adsorb the vapor-phase dioxin-like congener and collect the solid-phase PCDD/Fs and PCBs in the meantime. Additionally, the results of the pilot-scale adsorption system (PAS) experimentation indicate that each gram activated carbon adsorbs 105-115ng-PCDD/Fs and each surface area (m(2)) of activated carbon adsorbs 10-25ng-PCDD/Fs. Based on the results of PAS experimentation, this study confirms that the surface area of mesopore+macropore (20-200A) of the activated carbon is a critical factor affecting PCDD/F adsorption capacity. 相似文献
3.
Polybrominated diphenyl ethers in house dust in Singapore 总被引:8,自引:0,他引:8
The use of polybrominated diphenyl ethers (PBDEs) as flame retardants in Singapore is not strictly regulated; therefore these compounds can be readily found in furniture, electronic devices, and building materials. This study was the first of its kind to be conducted in Singapore to measure concentrations of PBDEs in house dust. Samples were collected from 31 homes in various locations across the island-state of Singapore, and a total eight PBDEs congeners were measured. PBDEs were detected in all 31 dust samples and the number of BDE congener detected per home ranged between 3 and 8. The most abundant BDE congeners found were BDE 47, 99 and 209, with a median value of 20 ng g(-1) dust, 24 ng g(-1) dust and 1000 ng g(-1) dust, respectively. BDE 209 contributed 88% to the median of all the congeners, and BDE 47 and 99 contributed 1.8% and 3.5%, respectively. Different congener profiles were observed between this and studies conducted elsewhere, which is consistent with the use of different commercial PBDE around the world. No significant correlations between PBDE dust levels and residential characteristics (number of TVs and computers, floor area or flooring material) were observed. The daily intake of PBDEs via the inhalation pathway was estimated. House dust may be regarded as the most important exposure route of PBDEs for children. 相似文献
4.
Djati Utomo Handojo Li Xiaodong Ng Eng Tak Jonathan 《Environmental science and pollution research international》2022,29(14):20078-20084
Environmental Science and Pollution Research - 相似文献
5.
Chia Hao Hsu Chorng Ming Cho 《Journal of the Air & Waste Management Association (1995)》2013,63(2):246-252
Abstract The removal system for the absorption of CO2 with amines and NH3 is an advanced air pollution control device to reduce greenhouse gas emissions. Absorption of CO2 by amines and NH3 solutions was performed in this study to derive the reaction kinetics. The absorption of CO2 as encountered in flue gases into aqueous solutions of monoethanolamine (MEA), diethanolamine (DEA), and NH3 was carried out using a stirred vessel with a plane gas-liquid interface at 50 °C. Various operating parameters were tested to determine the effect of these variables on the absorption kinetics of the reactants in both gas and liquid phases and the effect of competitions between various reactants on the mass-transfer rate. The observed absorption rate increases with increasing gas-liquid concentration, solvent concentration, temperature, and gas flow rate, but changes with the O2 concentration and pH value. The absorption efficiency of MEA is better than that of NH3 and DEA, but the absorption capacity of NH3 is the best. The active energies of the MEA and NH3 with CO2 are 33.19 and 40.09 kJ/mol, respectively. 相似文献
6.
W. S. Chow S. G. Tan Z. Ahmad K. H. Chia N. S. Lau K. Sudesh 《Journal of Polymers and the Environment》2014,22(1):140-147
In this study, bio-thermoset from epoxidized soybean oil (ESO) was prepared in the presence of methylhexahydrophthalic anhydride curing agent and 2-ethyl-4-methylimidazole catalyst. The crosslink densities of the synthesized ESO are ranged from 0.109 × 10?3 to 0.308 × 10?3 mol/cm3. The ESO bio-thermosets were exposed to the soil-burial test for 8 months. Weight change and morphology of the degraded ESO specimens were assessed. It was found that the weight loss of ESO was governed by the materials compositions, crosslink density and the soil-burial exposure time. The 3 mm thickness ESO bio-thermosets with crosslink density of 0.109 × 10?3 mol/cm3 had fully biodegraded after soil-burial for 6 months. In addition, 16S rDNA sequencing was carried out to identify the soil microorganisms. It was suggested that Comamonas sp., Bacillus sp., Streptomyces sp. and Acinetobacter sp. are the possible soil microbes that degrade the ESO bio-thermosets in the compost soil environment. 相似文献
7.
G. L. Sia C. N. Ong S. E. Chia H. Y. Ong W. H. Phoon K. T. Tan 《Environmental monitoring and assessment》1991,19(1-3):401-411
This study was conducted to evaluate the usefulness of various biological parameters for monitoring of workers exposed to methyl ethyl ketone (MEK). Fifty male workers from a large magnetic videotape factory participated in this study. Personal air samples were collected using 3M organic vapor monitors and analysed for MEK by gas chromatography with flame ionisation detector (FID). 10 mL of urine; blood (1 mL) and exhaled air were also collected at the end of an 8-hour workshift. The headspace GC method was applied for measurement of urinary and blood MEK. MEK in expired air was analysed directly by using a GC/FID.The correlation coefficients (r) between environmental MEK and all other biological parameters measured show significant positive relationships. The r for environmental MEK and urine MEK was 0.84; for blood 0.73 and for breath 0.64. The correlation coefficients between blood and urine was 0.72; blood and breath was 0.88 and urine and breath 0.60. These findings suggest that measurements of unmetabolised MEK in blood, exhaled air and urine can be used for biological monitoring of MEK exposure. Nevertheless, laboratory methodological assessment is in favour of measuring urinary MEK as it is non-invasive and does not have to be analysed immediately after collection. 相似文献
8.
9.
10.
Reproduction and development of two psolid sea cucumbers in waters of the San Juan Archipelago, Washington, were studied from April 1981 through August 1984. Spawning inPsolus chitonoides Clark andPsolidium bullatum Ohshima in the laboratory and in the field waters of the San Juan Archipelago, Washington, occurred from February through may, with heaviest spawning in April and May. The egg ofPsolus chitonoides was bright red in color and 627µm in diameter;Psolidium bullatum released eggs that were golden yellow in color and 330µm in diameter. Maximum measured fecundities (spawned eggs) forPsolus chitonoides andPsolidium bullatum were 34 700 and 3 074, respectively. Developmental schedules were similar in both species. Early cleavages were equal, radial, and holoblastic; slightly subequal cleavage was common inPsolus chitonoides. The gastrula elongated to form a uniformly ciliated larva and the vestibule first appeared as a ventral crescent-shaped depression, after which the larva decreased in length and formed three posterior ridges that encircled the early doliolaria. Just prior to settlement, there was loss of cilia between the three ridges and on the posterior end of the early doliolaria, leaving three ciliary rings that are characteristic of the dendrochirote doliolaria larva. Vertical swimming ensued, and five primary tentacles protruded through the vestibule, with occasional attachment to the substratum using the primary tentacles. Upon settlement, two primary podia emerged and all external ciliation was lost except among tentacular papillae and on the end of tube feet. Timing of appearance and of loss of ciliary rings suggest that the rings function in vertical swimming and substratum selection behaviors. Metamorphosis involved the following simultaneous events: (1) resorption of the preoral lobe, (2) formation of large, dorsal, calcareous ossicles, (3) flattening of the trivium, and (4) proliferation of ventral tube feet on Ambulacral Radii B and E to form the sole. Reproduction in the family Psolidae is reviewed. The large proportion of brooders in this family appears to be related to small size, the possession of protective armor and sole, and geographic distribution (mainly in Antarctica). Lecithotrophic doliolaria larvae with three ciliary rings are produced by large northern psolids. 相似文献