Regeneration von mit Ammoniak beladenem Klinoptilolith durch ein nicht‐thermisches Plasmaverfahren

Adsorbents are widely‐used in the area of cleaning as well as enrichment of gas components. For the regeneration of clinoptilolite loaded with ammonia, a packed‐bed reactor was developed on the basis of a dielectric barrier discharge. It was proved that adsorbed NH₃ is released at relatively low temperature and low energy consumption. For the further optimization of the method the influence of the power and the pulse break ratio of sustaining voltage were tested. It was shown that with the chosen plasma method the absorber material was loaded repeatedly and subsequently regenerated.     

TEMPORAL POST-DISCHARGE REACTIONS IN PLASMA-CHEMICAL DEGRADATION OF SLAUGHTERHOUSE EFFLUENTS

The plasma-chemical degradation of bovine blood effluents provided by a slaughterhouse plant is achieved by exposing the dilute blood target to a gliding discharge in humid air. The several steps of the degradation were ascribed to the oxidizing and acidifying properties of the parent species formed in the discharge (e.g., mainly °OH and °NO and their derivatives). The oxidation reactions go on after the discharge is switched off and evidence Temporal Post-Discharge Reactions (TPDR). This demonstrates that less reactive moieties than °OH and °NO – tentatively H₂O₂ and ONO₂H – are concerned in TPDR and probably also involved in the main degradation process performed under plasma conditions. Industrial effluents involve large quantities of sodium citrate additive (10^?2 mol L^?1), which is first degraded according to zero order kinetics, folllowed by a 1st order kinetic step (k₁ = 0.2 min^?1) ascribed to the diffusion controlled degradation of hemoglobin (Hb).     

小氮肥厂稀氨水治理试验运行小结

通过采用高效泡罩板塔、浮阀塔、严格控制软消和量，使碳化、精炼、合成了３个工段所产生的稀氮水总量小于生产碳酸氢铵所需的锑氨水量，达到稀氨水的零排放，不仅保护了环境，而且取得了一定的经济效益。     

基于APDPC的流域水污染物减排机制研究

针对我国现行的污染减排制度和减排方案与环境质量改善联系不紧密、激励约束机制不健全、减排责任落实不到位、监管与考核不力等问题,提出了基于人均累积(APDPC)的流域水污染物减排新机制,通过人均参考配额及人均累积参考配额,建立流域内不同区域间环境与经济的协调发展机制。以淮河流域为例,对安徽、河南、江苏和山东四省片区进行了实证分析,验证结果表明该方法具有公平、高效、简便、易操作等优点,具有较高的推广应用价值。     

凤南线500 kV电抗器内部放电故障的诊断

介绍了500kV电抗器在系统调试过程中内部放电故障的诊断，分析了故障产生的原因，说明了油中气体分析与电气试验相结合是综合判断充油电气设备内部故障最有效的方法。     

球阀流量系数的研究

针对球阀中液流流动情况提出了计算球阀收缩系数μ的简化模型及流量系数计算方法，并进行了实验分析。     

Comparison of eluted monomer from different indirect and direct resin composites

Indirect resin composites used in indirect restorations have been used as alternative methods to avoid the negative effects of a direct application. The composition and structure of these are similar to a direct composite. Several authors have discussed the elution monomer from resin composites because it is a crucial factor in optimizing the physical properties and biocompatibility of resin composites. The aim of this study was to compare the elution of monomers from different resin composites using high-performance liquid chromatography (HPLC). Indirect composites including Signum, Gradia, and Solidex, and direct composite Filtek Ultimate were used. The samples (2 x 5 mm) were prepared and polymerized for 20 seconds with a light-emitting diode unit. A secondary curing was then applied to the indirect resin composites. After fabrication, each sample was immediately immersed in a 75 wt% ethanol/water solution and analyzed by HPLC. The obtained data were analyzed with one-way ANOVA and Tukey HSD (p < 0.05). Residual monomers were eluted from indirect and direct resin composites and the amount of eluted monomers increased over time. The highest mean concentrations of residual Bis-GMA, UDMA, TEGDMA, and HEMA were detected with the Filtek Ultimate (2,342 µM), Solidex (7,908 µM), Signum (2.8 µM), and Filtek Ultimate (9.7 µM), respectively. The highest amount of eluted monomer concentrations detected was viewed as critical for toxic reactions in human cells.     

珠江口磨刀门水道咸潮入侵规律研究

根据2003年到2008年枯水期含氯度实测资料，以农历月份为统计周期，研究珠江口磨刀门水道咸水入侵规律。研究结果表明，磨刀门水道含氯度变化周期为15d，主要由大、中、小潮组成的15d潮汛周期所控制，而每个周期内含氯度变化幅度则受上游径流大小影响；并提出咸潮入侵系数K的概念，K可反映周期内平均径流和平均含氯度响应关系，当K小于0.2时，表示咸潮入侵程度小，不影响取水口取水，当K大于0.5时，咸潮入侵严重；K为0.2和0.5对应上游径流的临界流量分别为2450和1930m3/s；其后采用Delft3D模型区域分解技术将网格加密的磨刀门小区域嵌入到网格相对较大珠江口大区域模型中耦合计算，验证了咸潮入侵系数K的合理性。