全文获取类型
收费全文 | 57篇 |
免费 | 0篇 |
国内免费 | 4篇 |
专业分类
安全科学 | 2篇 |
废物处理 | 8篇 |
环保管理 | 3篇 |
综合类 | 11篇 |
基础理论 | 6篇 |
污染及防治 | 26篇 |
评价与监测 | 5篇 |
出版年
2022年 | 2篇 |
2021年 | 4篇 |
2020年 | 1篇 |
2019年 | 1篇 |
2017年 | 2篇 |
2016年 | 5篇 |
2014年 | 3篇 |
2013年 | 5篇 |
2012年 | 2篇 |
2011年 | 2篇 |
2010年 | 3篇 |
2009年 | 2篇 |
2008年 | 4篇 |
2007年 | 4篇 |
2006年 | 3篇 |
2005年 | 7篇 |
2004年 | 2篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2001年 | 2篇 |
2000年 | 1篇 |
1995年 | 1篇 |
1979年 | 1篇 |
1978年 | 1篇 |
排序方式: 共有61条查询结果,搜索用时 0 毫秒
21.
22.
Experience sampling methodology and daily diary (ESM/DD) research elicits repeated reports of immediate or very recent experiences from the same sample of people for several days or weeks. Experience sampling and diary methods were almost unheard of in organizational research 15 years ago, but the past decade has seen a rapid rise in their use. These methods are helpful in studying dynamic within‐person processes involving affect, behavior, interpersonal interactions, work events, and other transient workplace phenomena over time. Assessing cross‐level effects of traits or other stable features on within‐person processes and reactivity is also possible with ESM/DD data. We provide an introduction to issues in designing and carrying out an ESM/DD study, including data collection choices and schedules, measures, technology, training and motivation of participants, and analysis of multilevel data. We offer best practice recommendations and refer readers to further resources for additional detail on conducting and analyzing ESM/DD research. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
23.
Introduction D istillery w astew ater m ainly includes spent w ash, w hich is one of the m ost com plex, troublesom e industrial organic effluents. This kind of w astew ater has previously been treated aerobically after dilution w ith other w ash w aters.… 相似文献
24.
25.
Shigeyoshi Imaizumi Masazumi Wataru Naoki Takahashi Yoichi Doi 《Journal of Material Cycles and Waste Management》2009,11(4):299-304
A design method was proposed to determine the critical ratio of bentonite addition, based on a macro void ratio that considers
the swelling property of bentonite. The critical ratio of bentonite addition was defined as the ratio corresponding to a macro
void ratio of zero. However, when lightweight soil such as tuff sand is mixed with bentonite, the estimated critical ratio
of bentonite addition is too high. Several tests on the water absorbing property of tuff sand and its permeability were conducted
to confirm the concept of a revised macro void ratio. The revised macro void ratio, which takes into account the swelling
of bentonite and the particle pores of lightweight soil, is much smaller than the former macro void ratio for a given ratio
of bentonite addition. The estimated critical ratio of bentonite addition to tuff sand that gives a revised macro void ratio
of zero is around 18% and is in good agreement with the ratio of bentonite addition beyond which the value of hydraulic conductivity
does not decrease markedly. 相似文献
26.
Do Truong Xuan Phan Thi To Nga Van Dinh Son Tho 《Journal of Material Cycles and Waste Management》2021,23(6):2318-2335
Journal of Material Cycles and Waste Management - As with any developing country, Vietnam has faced numerous challenges in the management and treatment of municipal solid waste (MSW).... 相似文献
27.
Remediation of cadmium contamination in paddy soils by washing with chemicals: selection of washing chemicals 总被引:3,自引:0,他引:3
Makino T Sugahara K Sakurai Y Takano H Kamiya T Sasaki K Itou T Sekiya N 《Environmental pollution (Barking, Essex : 1987)》2006,144(1):2-10
The efficiencies of neutral salts, strong acids, and chelates were tested for extracting cadmium (Cd) from three paddy soils. The higher the selectivity of the cations of the added neutral salts toward soil adsorption sites, the lower the pH in the extracts and the more soil Cd could be extracted. In addition, soil carbon and nitrogen contents and mineral composition were closely associated with the amount of Cd extracted. Calcium chloride and iron(III) chloride were selected as wash chemicals to restore Cd-contaminated paddy soils in situ. Washing with calcium chloride led to the formation of Cd chloride complexes, enhancing Cd extraction from the soils. The washing also substantially decreased soil levels of exchangeable and acid-soluble Cd, which are the major forms of bioavailable Cd for rice (Oryza sativa L.). The optimum conditions for in situ soil washing were also determined for calcium chloride. 相似文献
28.
29.
Tho Dinh Son Van Nghia Phan Trung Vu Nguyen Anh Huong Nguyen Lan Anh To Kim 《International Journal of Green Energy》2016,13(7):720-729
To date, non-food vegetable oil has been considered as the primary source for biodiesel production. Rubber seed oil has high acid value (34 mgKOH/g) and can be used for biodiesel synthesis. The purpose of this study was to investigate esterification of fatty acid, which derived from rubber seed oil, in a plug flow reactor system at high temperature and low methanol consumption. Response surface methodology was applied for design experiment and optimization of esterification reaction. Temperature, methanol consumption, and sulfuric acid were chosen as variables to examine their influence in a conversion to methyl ester. At 140°C, at 5:1 methanol to fatty acid ratio (by mole), H2SO4 1.5 (%v/w), and space time 20 min, the conversion to methyl ester attained 98.2%. Fourier transform infrared spectroscopy (FTIR) and gas chromatography-Mass spectrometry (GC-MS) were used for analysis and to confirm the formation of methyl ester. Methyl ester was characterized for biodiesel fuel properties in accordance to ASTM standard. 相似文献
30.
Airborne particulate matter (APM) is a major air pollutant, and the effect on human health of fine APM (PM2.5) deposited deep inside the lungs has recently become a serious concern. Moreover, soluble constituents may leach from APM, and intensify some health disorders. To identify the soluble chemical constituents of APM, size-classified APM was sampled in central Tokyo, and the elemental compositions of the water-soluble, acid-soluble and insoluble fractions were investigated. The extraction procedure was validated by calculating the mass balance of soluble and insoluble fractions of a standard APM reference material (NIST SRM 1648). Among the major elements, Fe and Ti in APM of all size classes and K in coarse APM were distributed primarily in the insoluble fraction and were inferred to be present as oxides or silicates, whereas Na and Mg in all size classes and K in fine APM were primarily in the water-soluble fraction and were inferred to be have originated mainly from sea salt. Among the trace elements, Zn and Cd in the fine APM (d < 2 microm) had large enrichment factors, indicating an anthropogenic origin, and were distributed primarily in the water-soluble fraction. When fine anthropogenic APM enters into the lungs, leached toxic elements, such as Cd, may adversely affect health. The higher the bonding energy of the monoxide molecule of the element was, the higher its distribution ratio was in the water-soluble fraction. Therefore, many metallic elements in APM were inferred to be present as oxygen-bonded compounds. 相似文献