恶臭假单胞菌（Pseudomonas putida LY1）共代谢降解苯酚和4-氯苯酚系统的降解动力学研究

对恶臭假单胞菌（Pseudomonas putida LY1）共代谢降解苯酚和4-氯苯酚（4-CP）系统进行了降解实验和动力学研究.结果表明,恶臭假单胞菌可以有效地降解苯酚,苯酚浓度为50mg·L-1时细菌生长速度最快,4-氯苯酚浓度的增加会对细菌产生一定的抑制作用.同时,用改进的Haldane方程模拟恶臭假单胞菌LY...     

磷酸盐水泥对^90Sr固化性能的研究

以含95%MgO的重烧镁砂、磷酸盐和硼砂为原料,制备了磷酸盐水泥,研究其对90Sr的固化性能.同时,通过XRD、SEM等手段对固化体物相组成及显微结构进行分析,参照国家标准＂放射性废物固化体长期浸出试验＂（GB7023—86）对固化体进行抗浸出性能试验.结果表明,90Sr的加入会降低磷酸盐水泥固化体的抗压强度,随着90...     

粉煤灰对苯酚废水的吸附研究

在静态条件下研究了粉煤灰对苯酚的吸附性能,结果表明:平均粒径29.06μm,孔隙率64.0686%,在吸附时间50min,粉煤灰用量120 g/L,pH=7.45条件下,对75 mL浓度为30 mg/L的苯酚模拟废水,吸附效果最好,可达82.4%。粉煤灰吸附苯酚机理复杂,偏向于单分子层吸附的Langmuir吸附等温线模式:q=0.042Ce/(1+0.095Ce),吸附反应为一级反应,速率方程为lnC=-0.0096t+3.3097(C0=30 mg/L)。     

载镁活化天然沸石处理高氟水实验研究

为了提高沸石对氟的吸附能力,采用氯化镁对活化天然沸石进行改性,分析了除氟剂的性能,确定了除氟剂改性的最佳条件:10%氯化镁溶液,固液比1∶4,pH=7.0,室温以300 r/min的速度振荡改性3h。最佳除氟条件:pH=7.0,室温以300 r/min的速度搅拌反应1.5 h。吸附剂对F-的吸附过程符合Langmuir及Freundlich等温线方程,由D-R模型拟合可知,除氟剂对氟的吸附为物理吸附过程。在最佳反应条件下,水样中氟浓度由2 mg/L降低到0.78 mg/L,符合GB5949-2006《生活饮用水卫生标准》(≤1 mg/L)。     

Removal of antimony from antimony mine flotation wastewater by electrocoagulation with aluminum electrodes

Antimony (Sb) has received increasing environmental concerns due to its potential toxic and carcinogenic properties. In the present work, the electrocoagulation technique was used to treat the flotation wastewater from a heavy antimony polluted area, and the mechanism of removing Sb was also investigated. The study focused on the effect of operation parameters such as current density, initial pH and standing time on the Sb removal efficiency. Antimony concentration of below 1 mg/L in the treated wastewater was achieved, which meets the emission standards established by State Department of Environmental Protection and State Administration of China for Quality Supervision and Inspection and Quarantine of China.     

Effects of Na2CO3 on properties of low fluoride content mould flux for thin slab continuous casting

To reduce fluorine pollution, partial fluoride could be replaced by Na₂C0₃ in mould flux for continuous casting. The properties including melting temperature, viscosity fluidity, surface tension and A1₂0₃ inclusion adsorption of low fluoride content mould flux with addition of Na₂C0₃ for thin slab casting were studied. The results showed that with the increase in Na₂C0₃ content, melting temperature, viscosity and viscous activation energy of mould flux decreased obviously, fluidity increased, surface tension changed little, and A1₂0₃ inclusion adsorption of mould flux increased. The Na₂C0₃ could play effective role when its content was less than 9%. The results would play a guiding role in designing of low fluoride content mould flux for thin slab continuous casting.     

纳板河保护区生态旅游资源分析与评价

在总结调查资料的基础上,以西双版纳纳板河流域国家级自然保护区的生态旅游资源为研究对象,对其进行分类并评价,以期为今后保护区旅游开发提供科学依据。     

乌梁素海湿地鸟类栖息地生态服务功能评估探讨

本文通过收集近30年鸟类种类及种群数据变化的资料,分析乌梁素海不同鸟类栖息环境的栖息地服务功能,从而评估乌梁素海湿地鸟类栖息地的综合生态服务功能。评估结果表明:乌梁素海湿地鸟类栖息地综合生态服务功能为不好。     

内蒙古自治区公路建设过程中的生态环境保护探讨

本文拟通过对公路建设所造成的对生态环境的影响分析,以进一步提出生态恢复的方法和手段,从而在最大限度上降低因公路建设造成的对内蒙古地区的生态影响。     

新型低表面能涂层制备及紫外光照射研究

以自制氟硅聚合物为芯材,脲醛树脂为壁材,通过原位聚合法制备一种微胶囊.将其添加到涂料中制备出长效低表面能涂层.涂层的表面能低,与水接触角可达120°.涂层经紫外线照射400h后,其接触角下降不明显,表面能几乎不发生变化.