State Key Laboratory of Applied Organic Chemistry, College of Resources and Environment, Institute of Biochemical Engineering and Environmental Technology, Lanzhou University, Lanzhou, PR China.
Environ Technol. 2011 Aug-Sep;32(11-12):1337-43. doi: 10.1080/09593330.2010.536784.
Utilizing preferential ion exchange of the modified zeolite, the zeo-sequencing batch reactor (SBR) is recommended for a new nitrogen removal process. In this study, natural zeolite was modified by sodium chloride to enhance sorption capacity for ammoniacal nitrogen. The untreated and treated zeolite was characterized by XPS and XRD techniques. The sorption isotherm tests showed that equilibrium sorption data were better represented by the Langmuir model than by the Freundlich model. Treatment of natural zeolite by sodium chloride increased the sorption capacity for ammoniacal nitrogen removal from aqueous solutions. As a result of the continuous bioregeneration of ammonium saturated zeolite-floc in the SBR, the nitrogen removal efficiency of the zeo-SBR was relatively ideal. Scanning electron microscopy results showed that microbes were abundant in the zeo-SBR process.
利用改性沸石的优先离子交换作用，推荐使用沸石序批式反应器（SBR）作为一种新的脱氮工艺。本研究通过氯化钠对天然沸石进行改性，以提高其对氨氮的吸附能力。采用 XPS 和 XRD 技术对未处理和处理后的沸石进行了表征。吸附等温线测试表明，平衡吸附数据更符合朗缪尔模型，而不是弗伦德利希模型。用氯化钠处理天然沸石可提高沸石从水溶液中去除氨氮的吸附能力。由于 SBR 中连续生物再生饱和铵沸石絮体，沸石 SBR 的氮去除效率较为理想。扫描电子显微镜结果表明，在沸石 SBR 工艺中微生物丰富。
