Preparation and Application of Active Composite Antibacterial Material Containing Ag^+ and Zn^(2+)

A kind of active composite antibacterial material was prepared with CaHPO4 as the container, Ag^＋ and Zn^2＋ were adsorbed through ion-exchange, then it was doped with small scale of rare earth and photocatalyst, and was finally calcined at a certain temperature. The properties and application of the composite material antibacterial were investigated. Some tests show that the as-prepared antibacterial powders modified by opaque agents such os SnO2 and ZrO2, possess beautiful white and excellent climate resistance at normal temperatures and are promising candidate materials for antibacterial plastics and dope. The result of the application in glaze indicates that Ag^＋ can still exist stably, with no color change for the glaze, even being sintered at 1200℃ . SEM , EDS , antibacterial activity analyses and contrast tests reveal that the as-prepared antibacterial powders and the antibacterial glaze both have excellent antibacterial activities, without color change, in the case of dark or brightness.

纳米晶TiO_2光催化处理含锌废水的研究

采用溶胶-凝胶法制备锐态型纳米TiO_2,并利用XRD、SEM对TiO_2粉体进行表征,在紫外光的作用下将自制纳米TiO_2光催化处理含锌废水。考察废水pH值、废水负荷、催化剂用量、光照时间等因素对锌离子去除率的影响。结果表明,在废水锌质量浓度为50 mg/L,纳米TiO_2投加量为0.01 g/L,含锌废水的pH值为12,反应时间为30min时,废水中锌的去除率可达98.73%。

含铬污水修复的水生植物筛选

以芦苇、水芹菜、香蒲为研究对象,采用水培法在不同Cr2+浓度条件下,研究了水生植物对含铬污水的吸收和富集作用。结果表明:芦苇对Cr2+的去除率高于水芹菜、香蒲;植物根系对Cr2+的吸收富集作用优于植物茎叶,且芦苇对Cr2+具有较好的富集效果。

油田高含硫污水的氧化-絮凝协同处理研究

我国部分油田采油污水含硫量高,对集输管线及水质稳定影响较大,对其有效处理对于注水开发的安全稳定运行具有重要意义。采用ZnCl_(2)强化H_(2)O_(2)氧化方法并协同絮凝技术对含硫采油污水进行处理,以出水透光率、色度及含硫量为考察指标,考察了氧化、絮凝过程对高含硫污水处理效果的影响,探究了ZnCl_(2)强化H_(2)O_(2)氧化除硫机制。结果表明:在最佳氧化、絮凝条件下,可将油田污水的硫含量由处理前的200 mg/L降至1.22 mg/L,处理后水透光率达99.1%以上,色度降至4度以下,为我国高含硫油田污水处理提供参考。