固相法合成NaA型粉煤灰沸石对染料废水的吸附性能研究

发布时间：2018-03-21 09:48

本文选题：固相法　切入点：粉煤灰　出处：《人工晶体学报》2017年05期 　论文类型：期刊论文

【摘要】：以粉煤灰为原料,采用固相法合成NaA型粉煤灰沸石。通过静态吸附实验,研究了吸附时间、pH值、溶液浓度以及吸附温度对粉煤灰沸石吸附脱除亚甲蓝性能的影响。通过SME、XRD对产品进行表征,探讨了亚甲蓝在粉煤灰沸石上的吸附行为。结果表明:经XRD分析,合成产物主要为NaA型沸石。SEM分析表明,产物分别具有纺锤体及NaA型沸石立方体骨架结构;在吸附温度25℃,pH值5,粉煤灰沸石投加量8 g·L~(-1),吸附30 min时,NaA型沸石对初始浓度为50~100 mg·L-1的亚甲蓝去除率均可达90%以上,较粉煤灰提高了45%;与商品沸石的吸附性能相当。合成的粉煤灰沸石吸附亚甲蓝过程符合Langmuir模型,其为单分子层吸附。
[Abstract]:Using fly ash as raw materials by solid phase synthesis of NaA type zeolite from fly ash. The static adsorption experiment, the effects of adsorption time, pH value, solution concentration and temperature on the adsorption effect of fly ash zeolite adsorption of methylene blue by SME. The performance of XRD, the products were characterized and discussed the adsorption behavior of methylene blue in the fly ash zeolite. The results showed that the synthesis of XRD analysis, NaA is the main product of zeolite.SEM analysis shows that the product has the spindle and the zeolite NaA cube skeleton structure; in the adsorption temperature is 25 degrees centigrade, the pH value is 5, the fly ash zeolite dosage 8 g - L~ (-1), 30 min of adsorption when the NaA type zeolite on the initial concentration of 50~100 mg, L-1 methylene blue removal rate was up to 90%, increased by 45% compared with fly ash; adsorption properties of zeolite and commodity fairly. Synthesis of fly ash zeolite adsorption process of methylene blue with the Langmuir model, the single molecular layer adsorption.

【作者单位】：沈阳大学机械工程学院;沈阳大学环境学院区域污染环境生态修复教育部重点实验室;上海应用技术大学化学与环境工程学院;
【基金】：沈阳市科技计划(F13-062-2-00) 辽宁省教育厅项目(L2015361) 国家科技支撑计划(2012BAD14B04-5)
【分类号】：O647.3;X791

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