全文获取类型
收费全文 | 230篇 |
免费 | 4篇 |
国内免费 | 13篇 |
专业分类
安全科学 | 14篇 |
废物处理 | 31篇 |
环保管理 | 29篇 |
综合类 | 37篇 |
基础理论 | 38篇 |
污染及防治 | 80篇 |
评价与监测 | 16篇 |
社会与环境 | 1篇 |
灾害及防治 | 1篇 |
出版年
2022年 | 4篇 |
2021年 | 4篇 |
2020年 | 3篇 |
2019年 | 7篇 |
2018年 | 7篇 |
2017年 | 6篇 |
2016年 | 11篇 |
2015年 | 7篇 |
2014年 | 11篇 |
2013年 | 20篇 |
2012年 | 13篇 |
2011年 | 24篇 |
2010年 | 8篇 |
2009年 | 12篇 |
2008年 | 23篇 |
2007年 | 17篇 |
2006年 | 17篇 |
2005年 | 18篇 |
2004年 | 9篇 |
2003年 | 10篇 |
2002年 | 7篇 |
2001年 | 1篇 |
1998年 | 2篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1994年 | 2篇 |
1979年 | 1篇 |
排序方式: 共有247条查询结果,搜索用时 203 毫秒
241.
Moon Young Jung Yun Wang Choi Jae Gwon Jeong 《Environmental geochemistry and health》2011,33(1):113-119
The main objective of this study is to develop an eco-friendly and a large recycling technique of flotation Tailings from korea (TK) from metal mines as construction materials such as admixtures for high-fluidity concrete (HFC). TK used in this study was obtained from the Korea Molybdenum Corporation in operation. TK was used as the alternative material to adjust flowability and viscosity of HFC in the form of powder agent which enables adjustment of concrete compressive strength. In this study, we have performed concrete rheological tests and concrete flowability tests to obtain the quality characteristics of TK for using as the admixture in producing HFC. The results indicated that the adequate mix ratio of cement to TK should be 8:2 (vol%). It is more effective to use the TK as admixture to control flowability, viscosity and strength of HFC than the normal concrete. It was found that TK could be recycled construction materials in bulk such as admixture for HFC, in terms of the economic and eco-friendly aspects. 相似文献
242.
In Jae Shin 《Journal of Loss Prevention in the Process Industries》2013,26(4):803-814
This paper examines effectiveness of a regulatory enforcement organization (Major industrial Accident Prevention Center, MAPC), and a grading system for implementation of the Process Safety Management (PSM) regulation in Korea. A lot of chemical installations have been built in Korea since the 1960s. The frequent occurrence of major industrial accidents had made people's concerns grow. The Korean government enacted PSM regulations in 1996 in order to curb these accidents.However, a key question is how to make sure companies comply with the PSM regulations. In order to improve company’ compliance with PSM regulations the Ministry of Employment and Labor (MOEL) responsible for the regulation introduced a grading management system in 2001 and then established special supervisory centers for enforcement of PSM regulations in 2005. This paper reviews the role and effectiveness of the system in term of PSM enforcement. The author found that the grade-based approach has encouraged employers to implement the requirements of the PSM regulations. MAPCs play an effective role in enhancing enforcement performance. Although the more chemical plants have been established in Korea, the fewer major industrial accidents have occurred since the introduction of the system. The results may be useful for the policy maker to build an effective and efficient enforcement system. 相似文献
243.
Munsol Ju Sung-Jin Bae Jae Young Kim Dong-Hoon Lee 《Journal of Material Cycles and Waste Management》2016,18(3):419-426
Source-separated collection system of household food waste has been implemented national wide in South Korea. Food waste recycling rate that means conversion rate to recycle is over 90 % in present. However, over the value of 90 %, we need to enhance the efficiency of food waste recycling process. We analyzed material flow of 24 food waste recycling facilities and calculated solid recovery rate to key-process. We found that 3–13 % of the solids from food waste outflows with foreign materials and 27–33 % of the solids outflow with wastewater. As a result, solid recovery rates are 65.3, 60.9, and 56.3 % in wet feed facility, dry feed facility, and composting facility, respectively. Alternative ways to recovery solid from wastewater or collection tools to exclude plastic bags, salt, and moisture content are required to make food waste recycling more efficient. 相似文献
244.
With ketone pollution forming an ever-growing problem, it is important to identify a ketone-degrading microorganism and establish its effect. Here, a methyl ethyl ketone (MEK)-degrading bacterium, Pseudomonas sp. KT-3, was isolated and its MEK degradation characteristics were examined in liquid cultures and a polyurethane-packed biofilter. In liquid cultures, strain KT-3 could degrade other ketone solvents, including diethyl ketone (DK), methyl propyl ketone (MPK), methyl isopropyl ketone (MIPK), methyl isobutyl ketone (MIBK), methyl butyl ketone (MBK) and methyl isoamyl ketone (MIAK). The maximum specific growth rate (mumax) of the isolate was 0.136 h(-1) in MEK medium supplemented with MEK as a sole carbon source, and kinetically, the maximum removal rate (Vm) and saturation constant (Km) for MEK were 12.28 mM g(-1)DCW h(-1) (DCW: dry cell weight) and 1.64 mM, respectively. MEK biodegradation by KT-3 was suppressed by the addition of MIBK or acetone, but not by toluene. In the tested biofilter, KT-3 exhibited a>90% removal efficiency for MEK inlet concentrations of around 500 ppmv at a space velocity (SV) of 150 h(-1). The elimination capacity of MEK was more influenced by SV than by the inlet concentration. Kinetic analysis showed that the maximum MEK removal rate (Vm) was 690 g m(-3) h(-1) and the saturation constant (Km) was 490 ppmv. Collectively, these results indicate the polyurethane sequencing batch biofilter with Pseudomonas sp. KT-3 will provide an excellent performance in the removal of gaseous MEK. 相似文献
245.
This study was undertaken to ascertain optimal methods of sampling, preserving, separating, and analyzing arsenic species
in potentially contaminated waters. Arsenic species are readily transformed in nature by slight changes in conditions. Each
species has a different toxicity and mobility. The conventional field sampling method using filters of 0.45 μm in size could
overestimate the dissolved arsenic concentrations, as passing suspended particles that can act as a sink or source of arsenic
depending on the site condition. For arsenic species in neutral pH and iron-poor waters, the precipitation can be stable for
up to 3 days without any treatment, but for longer periods, a preservative, such as phosphoric acid, is required. Also, the
analytical procedure must be selected carefully because the levels and hydride generation efficiencies of arsenic in different
species can vary, even for the same amount of arsenic. For arsenic speciation in samples that also include organic species,
a hybrid high-performance liquid chromatography (HPLC) column and inductively coupled plasma mass spectrometry (ICP-MS) gave
the best resolution and lowest detection limits. However, the procedure using a solid phase extraction (SPE) cartridge can
be used economically and conveniently for analyzing samples containing only inorganic arsenic species, such as groundwater,
especially that related to mine activity. 相似文献
246.
Jo Hanseul Ryu Jaena Shin Jungwoo 《Environmental science and pollution research international》2022,29(35):53009-53021
Environmental Science and Pollution Research - In most developed countries, such as the USA, the E.U., and East Asia, the importance of public infrastructure asset management has been stressed for... 相似文献
247.
Lee Young Su Kim Young Kwon Choi Eunhwa Jo Hyeri Hyun Hyeseung Yi Seung-Muk Kim Jae Young 《Environmental science and pollution research international》2022,29(44):66591-66604
Environmental Science and Pollution Research - The emission sources and their health risks of fine particulate matter (PM2.5) in Siheung, Republic of Korea, were investigated as a middle-sized... 相似文献