搜索结果: 1-15 共查到“理学 SO2”相关记录111条 . 查询时间(0.187 秒)
中国科学院生态环境研究中心贺泓院士团队发现大气Cl-光活化及其催化氧化SO2的新机制（图）
贺泓 大气 光活化 催化氧化
2024/2/25
硫酸盐是大气细颗粒物（PM2.5）的主要成分，对全球气候变化、区域空气质量以及人类健康都有重要影响。目前全球和区域大气模式不能准确模拟硫酸盐的观测结果，说明大气中存在硫酸盐的未知生成机制。贺泓院士团队与宾夕法尼亚大学Joseph S. Francisco教授团队、北京理工大学张秀辉教授团队合作研究发现，在潮解NaCl颗粒上，SO2可以发生非均相光氧化反应生成硫酸盐。通过实验和量子化学理论计算证实，...
中国科学院大气物理研究所STETON: 京津冀一次区域污染过程中NOx、SO2、NH3和VOCs协同效应对二次无机气溶胶的影响（图）
京津冀 区域污染过程 NOx、SO2、NH3 VOCs协同效应对 二次无机气溶胶的影响
2022/3/20
京津冀地区是我国大气颗粒物污染最严重的地区，其中二次无机气溶胶（SIA）是其关键组分（PM2.5中占比经常高达50%以上），因此，研究NH3、NOx、SO2以及挥发性有机化合物（VOCs）的协同控制对大气颗粒物的影响作用将有助于解决空气污染问题。
由于我国的能源结构以煤炭为主，煤炭燃烧产生的SO2污染是我国面临的重大环境问题之一。除了SO2本身对人体健康有严重的影响，其通过气粒转化形成的二次气溶胶粒子会加剧灰霾的发生和发展。在“十一五”之后，SO2污染物总量减排成为我国的一项重要任务。许多研究工作都表明，我国SO2的排放量呈现显著的下降趋势。但是，仍有一些科学问题尚未弄清：(1) SO2是单调持续下降，还是存在一些复杂波动过程？(2) 不同...
以污水厂二次污泥为主要原料，掺杂不同量的废旧Ｚｎ⁃Ｃ电池电极材料，采用ＺｎＣｌ２活化法制备出废旧Ｚｎ⁃Ｃ电池⁃活性污泥炭，表征分析
污泥炭样品的碘吸附值、ＢＥＴ、ＦＴ⁃ＩＲ、ＳＥＭ⁃ＥＤＳ和ＸＲＤ，并进行了低浓度ＳＯ２气体动态吸附试验．试验结果表明，污泥与电池粉末质量比为３∶１
时，污泥炭的碘吸附值和比表面积分别达到７５０．６ｍｇ·ｇ...
SCR脱硝过程中SO2催化氧化的原位红外研究
V2O5-WO3/TiO2, 脱硝 SO2催化氧化
2015/12/23
采用工业用V2O5-WO3/TiO2催化剂,基于傅里叶原位红外光谱(FT-IR)技术考察SO2的氧化过程及烟气组分对SO2氧化行为的影响;结果表明,SO2在催化剂表面氧化主要是首先吸附在催化剂表面V2O5活性位上,占据其O原子,以SO2-3形式存在,后与催化剂表面V5+-OH发生反应,生成金属硫酸盐(VOSO4)中间产物,O2重新氧化催化氧化过程中由于被SO2夺取O原子而被还原的V2O5物种,使V...
Vulcamera: a program for measuring volcanic SO2 using UV cameras
Ultraviolet camera volcanic sulfur dioxide image acquisition
2015/8/27
We report here on Vulcamera, a stand-alone program for the determination of volcanic SO2 fluxes using ultraviolet cameras. The code enables field image acquisition and all the required post-processin...
Recent advances in ground-based ultraviolet remote sensing of volcanic SO2 fluxes
Volcanology Volcanic Gases Volcano monitoring Volcanic effects upon atmosphere Atmospheric instruments and techniques
2015/8/27
Measurements of volcanic SO2 emission rates have been the mainstay of remote-sensing volcanic gas geochemistry for almost four decades, and they have contributed significantly to our understanding of ...
Continuous SO2 flux measurements for Vulcano Island,Italy
SO2 Differential optical absorption spectroscopy Vulcano Island Network for Observation of Volcanic and Atmospheric Change
2015/8/24
The La Fossa cone of Vulcano Island (Aeolian Archipelago, Italy) is a closed conduit volcano. Today, Vulcano Island is characterized by sulfataric activity, with a large fumarolic field that is mainly...
SO2和BAaP复合暴露诱导小鼠心脏线粒体损伤的分子机制初探
细胞色素C氧化酶 合酶
2015/8/10
采用 Ｃ５７ＢＬ６ 小鼠作为模型，ＳＯ２（７ ｍｇ·ｍ
－３
）动式吸入染毒 ２８ ｄ，每天染毒 ６ ｈ；ＳＯ２吸入染毒开始后的第 １～５ ｄ，每天在 ＳＯ２吸入染毒结束
后对小鼠进行腹腔注射 ＢａＰ（４０ ｍｇ·ｋｇ
－１
（ｂ．ｗ．）），１ ｄ 注射 １ 次．吸入染毒结束后，采用荧光定量 ＰＣＲ 技术检测小鼠心肌细胞中由核 ＤＮＡ
（ｎＤＮＡ）编码的细胞色素 Ｃ 氧化酶亚基 ＣＯ４...
BrO/SO2 molar ratios from scanning DOAS measurements in the NOVAC network
BrO/SO2 molar ratios scanning DOAS measurements NOVAC network
2015/1/6
The molar ratio of BrO to SO2 is, like other halogen/sulfur ratios, a possible precursor for dynamic changes in the shallow part of a volcanic system. While the predictive significance of the BrO/SO2 ...
Inclusion of ash and SO2 emissions from volcanic eruptions in WRF-Chem: development and some applications
ash SO2 emissions volcanic eruptions WRF-Chem development some applications
2014/12/16
We describe a new functionality within the Weather Research and Forecasting (WRF) model with coupled Chemistry (WRF-Chem) that allows simulating emission, transport, dispersion, transformation and sed...
Volcanic SO2 by UV-TIR satellite retrievals:validation by using ground-based network at Mt. Etna
Volcanic SO2 UV-TIR satellite retrievals:validation ground-based network Mt. Etna
2015/8/18
Mt. Etna volcano in Italy is one of the most active degassing volcanoes worldwide, emitting a mean of 1.7 Mt/year of Sulphur Dioxide (SO2) in quiescent periods. In this work, SO2 measurements retrieve...
Intercomparison of Metop-A SO2 measure- ments during the 2010- 2011 Icelandic eruptions
Metop-A Sulphur Dioxide Volcano GOME-2 IASI Brewer
2015/8/18
The European Space Agency project Satellite Monitoring of Ash and Sulphur Dioxide for the mitigation of Avi- ation Hazards, was introduced after the eruption of the Icelandic volcano Eyjafjallajö...
Volcanic Ash and SO2 retrievals using synthetic MODIS TIR data:comparison between inversion procedures and sensitivity analysis
Volcanic Ash SO2 retrievals synthetic MODIS TIR data
2015/8/18
In this work the volcanic ash and SO2 retrievals obtained by applying three different procedures (LUT - Look Up Table, NN - Neural Network and VPR - Volcanic Plume Removal) on MODIS Thermal InfraRed (...