共查询到17条相似文献,搜索用时 62 毫秒
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以亚甲基蓝为模板分子,丙烯酰胺为功能单体,乙二醇二甲基丙烯酸酯(EGDMA)为交联剂,偶氮二异丁腈(AIBN)为引发剂,采用沉淀聚合法制备了亚甲基蓝分子印迹聚合物微球(MIP)。用扫描电镜表征了MIP的形貌,结果显示制备的MIP的粒径为1~3μm,粒径较为均匀。考察了MIP对亚甲基蓝的吸附性能,结果表明其吸附动力学过程可以用假二级吸附速率方程来描述,MIP对亚甲基蓝的最大吸附量为27.1 mg/g,吸附效果较好,可以用于染料废水中亚甲基蓝的分离富集。 相似文献
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以亚甲基蓝为模板分子,丙烯酰胺为功能单体,乙二醇二甲基丙烯酸酯(EGDMA)为交联剂,偶氮二异丁腈(AIBN)为引发剂.采用沉淀聚合法制备了亚甲基蓝分子印迹聚合物微球(MIP)。用扫描电镜表征了MIP的形貌,结果显示制备的MIP的粒径为1~3μm,粒径较为均匀。考察了MIP对亚甲基蓝的吸附性能,结果表明其吸附动力学过程可以用假二级吸附速率方程来描述,MIP对亚甲基蓝的最大吸附量为27.1mg/g,吸附效果较好,可以用于染料废水中亚甲基蓝的分离富集。 相似文献
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以Y3+掺杂二氧化钛为光催化剂,以亚甲基蓝为模拟印染废水进行光催化降解实验,考察了催化剂用量、溶液初始pH值、溶液初始浓度、反应时问等因素对降解反应的影响,结果表明:当催化剂的用量为1。5g/L,亚甲基蓝洛液pH值为9.0、初始浓度为20mg/L,反应60rain后,其降解效果最佳。 相似文献
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锰氧化物具有较强的氧化能力,天然氧化锰矿(MnO_x)因表面成分复杂,降低了其活性。利用硝酸对天然氧化锰矿改性,并研究了其对亚甲基蓝(MB)废水的去除效果。试验发现:硝酸改性后的氧化锰矿(M-MnO_x)对MB的去除能力显著提高,如pH值为2条件下反应3 h后,MnO_x和M-MnO_x对MB去除率分别为72.37%和98.69%;另外,MB的去除率随着反应体系pH值(2~11)的升高而出现先降低后升高的现象,反应9 h后,MB去除率在pH值为8时最低。根据反应前后MB样品的全波长扫描及溶液中Mn~(2+)浓度变化发现,酸性条件下改性锰矿石主要通过氧化作用去除MB,而碱性条件下吸附过程起主要作用。对反应体系的pH、改性锰矿石的投加量、MB初始浓度等参数对MB去除的影响进行动力学拟合,并讨论了上述参数对MB降解速率的影响。 相似文献
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吸附法处理亚甲基蓝研究 总被引:5,自引:2,他引:5
处理亚甲基蓝的方法很多,吸附法是其中之一。吸附法属于物理化学法,具有操作简单、费用低、处理效果较好等优点,历来受到研究者和使用者的重视。重点介绍了近年来采用吸附法处理亚甲基蓝的研究进展,特别是新型吸附剂以及吸附动力学与热力学等领域的研究进展。结果表明,吸附法处理亚甲基蓝有一定优势,在应用中要根据废水实际情况和生产状况选择最佳处理和回收工艺。 相似文献
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Guangxue Liu Zonggao Hu Rouwen Guan Yafei Zhao Hongsong Zhang Bing Zhang 《Korean Journal of Chemical Engineering》2016,33(11):3141-3148
Novel porous calcium alginate beads were prepared via crosslinking of calcium followed by freeze drying for investigating the adsorption performance for methylene blue. These beads possessed reduced shrinkage, highly porous lamellar structure and high specific surface area, and exhibited enhanced adsorption capacity and much faster adsorption rate compared to the non-porous beads obtained with conventional oven drying method. Methylene blue adsorption capacity increased with increasing of initial concentration and pH, while decreased with increasing of temperature. The adsorption process fitted well with the pseudo-second-order kinetic model and the Langmuir isotherm. The maximum adsorption capacity was 961.5 mg g?1 at 298.15 K. After eight successive adsorption-desorption cycles, the adsorption capacity had negligible decrease. Owing to the high adsorption capability, rapid adsorption rate, easy recovery and reusability, the freeze-dried beads imply a prospective, biodegradable and attractive adsorbent for removing contaminants from wastewater. 相似文献
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Adsorption of methylene blue on kaolinite 总被引:1,自引:0,他引:1
Methylene blue was adsorbed on kaolin from a local deposit. The raw kaolin itself was a relatively good adsorbent. The adsorption capacity was improved by purification and by treatment with NaOH solution. Calcination of the kaolin reduced the adsorption capacity. The adsorption data could be fitted by the Freundlich and Langmuir equations. Also, the thermodynamic parameters such as ΔH0, ΔS0 and ΔG0 were determined. 相似文献
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