全文获取类型
收费全文 | 122篇 |
免费 | 2篇 |
国内免费 | 33篇 |
专业分类
安全科学 | 2篇 |
废物处理 | 6篇 |
环保管理 | 6篇 |
综合类 | 36篇 |
基础理论 | 23篇 |
污染及防治 | 66篇 |
评价与监测 | 7篇 |
社会与环境 | 11篇 |
出版年
2023年 | 3篇 |
2022年 | 11篇 |
2021年 | 4篇 |
2020年 | 5篇 |
2019年 | 4篇 |
2018年 | 7篇 |
2017年 | 5篇 |
2016年 | 5篇 |
2015年 | 5篇 |
2014年 | 6篇 |
2013年 | 8篇 |
2012年 | 6篇 |
2011年 | 16篇 |
2010年 | 7篇 |
2009年 | 11篇 |
2008年 | 7篇 |
2007年 | 4篇 |
2006年 | 7篇 |
2005年 | 6篇 |
2004年 | 3篇 |
2003年 | 1篇 |
2002年 | 8篇 |
2001年 | 2篇 |
2000年 | 5篇 |
1999年 | 2篇 |
1998年 | 1篇 |
1997年 | 3篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1992年 | 1篇 |
排序方式: 共有157条查询结果,搜索用时 140 毫秒
81.
Water and several wild aquatic species including Chinese mysterysnail, prawn, fish, and water snake were collected from a reservoir surrounded by several e-waste recycling workshops in South China. The samples were examined to investigate the levels and bioaccumulation extent of polybrominated diphenyl ethers (PBDEs) and polychlorinated biphenyls (PCBs) released from electronic waste (e-waste) which was processed by crude recycling method. Elevated levels of PBDEs [52.7 to 1702 ng/g wet weight (ww)] and PCBs (20.2-25958 ng/g ww) were found in the collected biota species compared to that in the reference samples (13.0-20.5 ng/g ww for PBDEs and 75.4-82.8 ng/g ww for PCBs). log BAF (bioaccumulation factor) ranged from 2.9 to 5.3 for PBDEs and from 1.2 to 8.4 for PCBs, depending on congeners and species. The relationship between log BAFs and log K(OW) (octanol-water partition coefficient) can be adequately described by species-specific parabolic models wherein log BAFs generally increased at log K(OW)<7 then decreased with further increasing log K(OW) both for PBDEs and PCBs. The exceptions were for Chinese mysterysnail and prawn, in which the log BAFs showed a positive linear correlation with log K(OW) for PBDEs. Some PBDE and PCB congeners showed BAF values declining from the general trend predicted by K(OW), largely attributing to metabolism of these congeners in species sampled. 相似文献
82.
In this work, dynamic mathematical model for the prediction of the operational parameter volatile fatty acids/bicarbonate
alkalinity (VFA/ALK) in a UASB reactor was developed. The dynamic modeling technique was applied successfully to a two-year
data record from an industrial wastewater treatment plant of a potato processing industry. The technique used included regression
analysis by residuals. Seventeen parameters were examined including the following: wastewater's flow rate, reactor's temperature
and pH, total and soluble influent COD, wastewater's temperature and pH, total and soluble effluent COD, volatile fatty acids,
alkalinity, biogas production rate and each parameter with a time lag of up to 10 days. Finally, after all parameters and
all time lag trials the best fitted model was developed. The model's adequacy was checked by χ2 test for a data record of the same UASB reactor but at a different time period and proved to be satisfactory. Additionally,
the model's ability to predict and to control the plant's operation via VFA/ALK was examined. Through this model, in contrary
to steady state models, various aspects of the process can be enlighten, such as the fact that the hydrolysis of starch requires
at least a resident time of seven days. 相似文献
83.
84.
湛江市环境管理信息系统建设研究 总被引:1,自引:0,他引:1
湛江市地方环境特点和环保局职能,介绍了该市环境管理信息系统的开发目的,系统,结构设计,主要等,该系统在Windows95环境下,以Foxpro3.0为主要支持工具,结合其他GIS软件,模型采用FortranforWindowsVisualC++4.0为编程语言,建立了全 中文界面的多媒体环境管理信息系统。 相似文献
85.
Dioxin is the common name for polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs), and is abbreviated as PCDD/Fs. In the case of Southern Vietnam, is of high concern dioxin contamination in the areas affected by past-use chemical defoliants. Our study related to the zone considered as a "hot spot"--Bien Hoa Airbase and surrounding areas (Bien Hung Lake). Although the war ended over 30 years ago, the adverse effects on this territory still continue. Soil and sediment were selected for our research as they act as a sink for PCDD/Fs. The samples were taken and analyzed in CECOTOX laboratory following certified procedures. The total amounts of PCDD/Fs (2,3,7,8 related congeners) in the samples were converted into WHO-TEQ and compared with standard values proposed by Canadian environmental quality guidelines. The obtained data shows a relatively high risk (up to 20.4 times higher than (probable effect level) PEL value for sediment and 46 times higher than standard value for soil). The research is continuing on the assessment of dioxin transport in food chain. Moreover, considering the obtained data a complete solution should be found urgently to solve the problem of dioxin contamination in the studied areas. 相似文献
86.
UBF-物理化学组合工艺处理Zn5-ASA医药废水的研究 总被引:1,自引:0,他引:1
采用砂滤-UBF厌氧-絮凝沉淀工艺处理高浓度Zn5-ASA医药废水。实验结果表明,对于COD为8000-10000mg/L,色度7000-9000倍的Zn5-ASA废水,加石灰乳和H2SO4预调,经砂滤柱过滤后,COD会去除20%左右;再进以聚丙烯环为填料的厌氧UBF反应器,HRT为10.57h,COD去除率达83%-89%;出水再经化学絮凝沉淀后,无色透明,COD浓度远小于1000mg/L,符合GB8978-96三级排放标准要求,且色度小于10倍。 相似文献
87.
区域可持续发展评价工作的经常化问题 总被引:1,自引:1,他引:1
讨论了区域可持发展评价的经常化问题,提出了一张通用的指导性评价指标清单及其使用方法。经过实例模拟验算,认为基本可行,建议让区域可持续发展评价工作成为政府的定期行为 。 相似文献
88.
Wang Hongji Yang Mai He Rui Zheng Peng 《Environmental science and pollution research international》2022,29(48):72090-72100
Environmental Science and Pollution Research - The mechanism of how environmental regulations (ERs) affect export sophistication (ES) is complex, and for many years, it has been a hot topic for... 相似文献
89.
粗犷的电子垃圾拆解活动已造成当地野生生物多氯联苯(PCBs)严重污染,但PCBs在野生鸟类中的生物累积特征及潜在的毒害作用研究较少。本研究采集了广东省某电子垃圾拆解地翠鸟(Alcedo atthis)及其食物(各种小型鱼类)样品,研究翠鸟对PCBs的累积特征、生物放大效应及毒性风险。翠鸟肌肉中PCBs中值含量为220μg·g~(-1)脂重,比其他报道值高1~3个数量级。计算的生物放大因子(BMF)显示,大部分PCB单体的BMF值都大于1,表明翠鸟对PCBs具有生物放大效应。计算的共面PCBs毒性当量(TEQs)范围为39~23 600 pg·g~(-1)湿重,已经达到或超过了影响某些鸟类生殖或发育障碍的报道值。上述结果表明,电子垃圾拆卸活动已经造成了当地翠鸟PCBs严重污染,PCBs污染物对电子垃圾拆解地翠鸟及其他野生生物的毒性效应尚需进一步研究。 相似文献
90.
Mai Lei Lian Yu van den Akker Ben Fallowfield Howard J. 《Environmental science and pollution research international》2019,26(20):20520-20529
Environmental Science and Pollution Research - Nitrifying trickling filters (NTFs) are often introduced to pre-treat waters before chlorination process, to reduce the ammonia-driven chlorine... 相似文献