全文获取类型
收费全文 | 119篇 |
免费 | 1篇 |
国内免费 | 11篇 |
专业分类
安全科学 | 1篇 |
废物处理 | 5篇 |
环保管理 | 4篇 |
综合类 | 68篇 |
基础理论 | 9篇 |
污染及防治 | 22篇 |
评价与监测 | 22篇 |
出版年
2021年 | 3篇 |
2020年 | 1篇 |
2018年 | 4篇 |
2017年 | 1篇 |
2016年 | 4篇 |
2015年 | 5篇 |
2014年 | 9篇 |
2013年 | 5篇 |
2012年 | 1篇 |
2011年 | 4篇 |
2010年 | 4篇 |
2009年 | 8篇 |
2008年 | 7篇 |
2007年 | 6篇 |
2006年 | 6篇 |
2005年 | 2篇 |
2004年 | 8篇 |
2003年 | 10篇 |
2002年 | 8篇 |
2001年 | 6篇 |
2000年 | 4篇 |
1999年 | 2篇 |
1998年 | 7篇 |
1997年 | 2篇 |
1996年 | 5篇 |
1995年 | 6篇 |
1994年 | 1篇 |
1992年 | 1篇 |
1987年 | 1篇 |
排序方式: 共有131条查询结果,搜索用时 15 毫秒
31.
红外分光光度法测定水中石油类,可用S-316(六氯四氟丁烷)作提取剂,测定了以S-316为溶剂配制的正十六烷,姥鲛烷和甲苯溶液的校正系数,并对该校正系数作了检验,比较了S-316和CCl4的本底值和萃取率,结果表明S-316可作为红外法测定水中石油类的提取剂,并具有毒性小,萃取率高等特点。 相似文献
32.
White lupin is an annual crop that has been used for phytostabilization of acidified multicontaminated (heavy metals and As)
soils from the Aznalcóllar spill-affected area, Southern Spain. One of the most important factors for successful phytostabilization
is monitoring the pollutant bioavailability in the soil. The aim of this work was to determine the best-suited method for
assessing the bioavailability of heavy metals together with As in the Aznalcóllar spill-affected area, by means of a systematic
comparison between different extraction methods (Ammonium bicarbonate-diethylenetriamine pentaacetic acid (AB-DTPA), CaCl2, NaNO3, BCR, (NH4)2SO4 and rhizo). Both AB-DTPA and the first step of the BCR method were found to be unsuitable for assessing the bioavailability of heavy
metals and As to plants growing in acidic soils. However, CaCl2-extractable As, Cu, and Zn and NaNO3-extractable As and Zn were well correlated with their concentrations in plant organs. Rhizo and (NH4)2SO4, with the highest determination coefficients, were the most recommended simple extraction methods to assess the bioavailability
of As, Cu, Fe, Mn, and Zn in acidified multicontaminated soils using white lupin as an excluder model plant. 相似文献
33.
K. Nakamiya T. Furuichi K. Ishii 《Journal of Material Cycles and Waste Management》2003,5(1):0063-0068
The optimal soil-washing conditions for dioxins were estimated on a soil sample from the circumference of an incinerator
in Nose City, Osaka, Japan. The solvents ethanol, methanol, and acetone, together with a surfactant (100% of each) could extract
40% of the dioxins from contaminated soil at room temperature. From among these solvents, ethanol was chosen for a study on
how to optimize the extraction conditions because of its low toxicity and its economic advantages. The time-course of the
agitation showed that the extraction rate increased for 1 min, and thereafter the rate decreased. Therefore, the agitation
time was fixed at 1 min. To estimate the effect of temperature on the extraction rate, the extraction temperature was changed.
The amount of dioxins extracted was largest at the boiling point of ethanol (78.3°C), giving about 76% extraction. Furthermore,
at this temperature, almost 100% of the dioxins in the contaminated soil were extracted when the ratio of water to ethanol
was 20%.
Received: March 6, 2002 / Accepted: September 9, 2002 相似文献
34.
35.
Despite numerous reviews suggesting that microbial biosensors could be used in many environmental applications, in reality they have failed to be used for which they were designed. In part this is because most of these sensors perform in an aqueous phase and a buffered medium, which is in contrast to the nature of genuine environmental systems. In this study, a range of non-exhaustive extraction techniques (NEETs) were assessed for (i) compatibility with a naphthalene responsive biosensor and (ii) correlation with naphthalene biodegradation. The NEETs removed a portion of the total soil naphthalene in the order of methanol > HPCD > βCD > water. To place the biosensor performance to NEETs in context, a biodegradation experiment was carried out using historically contaminated soils. By coupling the HPCD extraction with the biosensor, it was possible to assess the fraction of the naphthalene capable of undergoing microbial degradation in soil. 相似文献
36.
The optimized BCR sequential extraction procedure was applied to nine roadside soil samples for the determination of Cd, Cr,
Pb and Ni. The extractable metals were isolated into three operationally defined fractions viz: acid extractable, reducible
and oxidizable. The residue was treated with aqua regia solution. Metal analysis was done using flame atomic absorption spectrophotometry
with air–acetylene flame. Results obtained showed the concentrations of the metals as relative abundance in the mobile phases
of the samples (based on the sum of the first three fractions) are in the following order: Cd(91.9) > Pb(82.8) > Ni(49.5) > Cr(39.0).
The most non-mobilizable metals were Cr and Ni which are generally lithogenic, associated with the silicate matrix, and the
order is as follows: Cr(61.0) > Ni(50.5) > Pb(17.2) > Cd(8.1). The recovery of all the metals expressed as the ratio of total
metal concentration to fractional sum of the optimized BCR sequential extraction procedure was of the order: Cr(95.6) > Pb(95.0) > Ni(94.8) > Cd(92.4). 相似文献
37.
38.
气相色谱法测定土壤中六六六残留量 总被引:3,自引:0,他引:3
采用气相色谱法毛细管色谱柱分离、电子捕获检测器检测土壤中残留的六六六含量。索氏提取和超声波提取2种方法的研究结果表明,索氏提取法加标回收率在86.93%~98.54%之间,相对标准差为1.78%~9.59%;超声波提取法加标回收率在90.23%~103.29%之间,相对标准差为2.32%~9.33%。两种方法均准确、灵敏,超声波提取法时间短、效率高。 相似文献
39.
Yoshiro Ono Hidehito Uemura Yoshinori Kanjo Osami Kawara Toshiki Ayano 《Journal of Material Cycles and Waste Management》2000,2(1):38-42
Construction waste such as road pavement and concrete is estimated to constitute about 50% of the total industrial waste in
Japan, and the recycling of such material has recently become a prominent topic among construction engineers. It has also
been suggested that various types of industrial waste be utilized as components of construction materials. This paper investigates
the environmental safety of certain materials in terms of the elutions and genotoxicities of these substances. The substances
extracted from some materials, such as emulsifier, ash, and sediment, were found to have genotoxic characteristics. The dose-related
responses of the various materials and their genotoxic strengths are shown.
Received: June 16, 1998 / Accepted: September 7, 1999 相似文献
40.
在时花椒风味物质的研究中,采用传统的有机溶剂萃取,并通过GC-MS对提取物进行了定性,实验结果表明,花椒中的香味物质主要有棕榈酸、芳樟醇、胡椒酮. 相似文献