搜索结果: 1-15 共查到“知识库 理学 NO3-”相关记录52条 . 查询时间(0.133 秒)
以Ti板为基体，采用异位电沉积法通过调控电镀时间制备了质量分数（δ）分别为0.02，0.28，1.39和5.65的Ti（100-δ）Cuδ阴极；利用扫描电子显微镜（SEM）、X射线衍射（XRD）、电化学测试及NO3-处理实验等手段对其微观形貌、物相组成、电催化活性、抗腐蚀性能和产物选择性等进行了表征. 结果表明，δ≥0.28时Ti（100-δ）Cuδ电极表面的Cu镀层呈现（111）晶面择优取向，可...
负载零价铁膨胀石墨的合成及对水中NO3-去除的效果与机制
零价铁 膨胀石墨 硝酸根去除 去除机理
2019/1/24
以网络状孔型结构发达的膨胀石墨（EG）为载体，采用化学沉积法制备了负载零价铁（ZVI）的膨胀石墨（EG-ZVI）.利用扫描电子显微镜（SEM）、X射线衍射（XRD）仪及X射线光电子能谱仪（XPS）等对负载及反应前后的EG-ZVI进行表征，探究了EG-ZVI对硝酸根（NO3-）的去除效果并对其反应产物及机理进行了分析.结果表明，亚微米级零价铁已负载到EG石墨表面，且分布均匀；与EG相比，EG-ZVI...
本文运用营养液培养方法、15N底物标记及同位素质谱测定技术等, 首先鉴定了两烟草(Nicotiana tabacum)品种(‘K326’和‘红花大金元’)吸收NO3−及NH4+而不发生向地上部转移的最短时间, 继而对其吸收的系统组成进行了较精确的测定, 发现两品种吸收氮素至转移到地上部仅在数分钟之内; 根细胞吸收N至少有两类体系。在N浓度≤1 mmol·L-1时, 根系吸收途径具有酶促...
生物表面活性剂改性对纳米铁/炭去除地下水中NO3--N的影响
生物表面活性剂 纳米铁/炭 NO3--N 地下水
2016/11/1
纳米铁由于其反应活性强、来源广泛等优点被广泛应用在去除地下水NO3--N污染中.利用生物表面活性剂对纳米铁进行改性可以避免采用化学表面活性剂改性对环境造成的二次污染.本研究采用鼠李糖脂、茶皂素、无患子3种生物表面活性剂对纳米铁进行改性后附着在活性炭上构成改性纳米铁/炭复合材料，通过批试验、沉降试验、迁移试验等研究生物表面活性剂对纳米铁/炭复合材料的改性作用.结果表明：鼠李糖脂、茶皂素、无患子对纳米...
利用差分吸收光谱系统得到了大气NO3、NO2和O3的浓度，基于NO3损耗率和温度关系，获得了一种判定NO3对于VOCs的大气氧化能力和清除大气中NOx能力的新指示剂，该指示剂用动力学常量和单萜烯释放速率与温度关系来研究NO3的损耗率．新指示剂应用于研究合肥郊区外场观测的NO3的氧化能力，分析结果表明，在观测期间单萜烯对于NO3的损耗贡献约为70%～80%.
Diurnal variation of midlatitudinal NO3 column abundance over table mountain facility, California
midlatitudinal NO3 column table mountain facility California
2011/2/25
The column abundance of NO3 was measured over Table Mountain Facility, CA (34.4° N, 117.7° W) from May 2003 through September 2004, using lunar occultation near full moon with a grating spectrometer. ...
Global modeling of organic aerosol: the importance of reactive nitrogen (NOx and NO3)
organic aerosol reactive nitrogen (NOx and NO3)
2010/12/20
Reactive nitrogen compounds, specifically NOx and NO3, likely influence global organic aerosol levels. To assess these interactions, GEOS-Chem, a chemical transport model, is updated to include improv...
Night-time chemistry above London: measurements of NO3 and N2O5 from the BT Tower
Night-time chemistry London NO3 N2O5 the BT Tower
2010/10/21
Broadband cavity enhanced absorption spectroscopy (BBCEAS) has been used to measure the sum of concentrations of NO3 and N2O5 from the BT (telecommunications) Tower 160 m above street level in central...
Response of tropical stratospheric O3, NO2 and NO3 to the equatorial Quasi-Biennial Oscillation and to temperature as seen from GOMOS/ENVISAT
tropical stratospheric O3, NO2 and NO3 the equatorial Quasi-Biennial Oscillation temperature GOMOS/ENVISAT
2010/9/21
Quasi-Biennial Oscillation signals can be found in the evolution of the three constituents up to at least 40 km. We found that NO3 is positively correlated with temperature up to 45 km in the region w...
The Global Ozone Monitoring by Occultation of Stars (GOMOS) instrument onboard the European Space Agency's ENVISAT satellite measures ozone, NO2, NO3, H2O, O2, and aerosols using the stellar occultati...
NO3 radical measurements in a polluted marine environment: links to ozone formation
NO3 radical measurements a polluted marine environment ozone formation
2010/8/12
Nighttime chemistry in polluted regions is dominated by the nitrate radical (NO3) including its direct reaction with natural and anthropogenic hydrocarbons, its reaction with NO2 to form N2O5, and sub...
Uptake of NO3 and N2O5 to Saharan dust, ambient urban aerosol and soot: a relative rate study
NO3 and N2O5 Saharan dust ambient urban aerosol and soot a relative rate study
2010/8/12
The uptake of NO3 and N2O5 to Saharan dust, ambient aerosols and soot was investigated using a novel and simple relative rate method with simultaneous detection of both NO3 and N2O5. The use of cavity...
Kinetic double-layer model of aerosol surface chemistry and gas-particle interactions (K2-SURF): Degradation of polycyclic aromatic hydrocarbons exposed to O3, NO2, H2O, OH and NO3
Kinetic double-layer model aerosol surface chemistry gas-particle interactions K2-SURF
2009/12/31
We present a kinetic double-layer surface model (K2-SURF) that describes the degradation of polycyclic aromatic hydrocarbons (PAHs) on aerosol particles exposed to ozone, nitrogen dioxide, water vapor...
La[B5O8(OH)(H2O)]NO3•2H2O的合成与结构
稀土硼酸盐 合成 晶体结构
2009/12/14
采用熔融硼酸法合成了一种具有层状结构的新型水合稀土多硼酸盐, La[B5O8(OH)(H2O)]NO3•2H2O, 并利用单晶X射线衍射技术确定了它的结构. 它属于单斜晶系, P21/n空间群. 其基本构建单元 (fundamental building block, 简称FBB)是由三个BO4和两个BO3基团所构成的一个双三元环[B5O12]基团. 结构中每一个FBB通过共顶点氧原子...