| TiO2@酵母复合微球固定床吸附荧光增白剂-VBL的研究 |
| 摘要点击 1967 全文点击 2095 投稿时间：2014-08-26 修订日期：2014-10-08 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 TiO2@酵母 固定床 FWA-VBL 模型 再生 |
| 英文关键词 TiO2@yeast fixed bed FWA-VBL models regeneration |
|
| 中文摘要 |
| 研究了TiO2@酵母复合微球在固定床中吸附阴离子型荧光增白剂-VBL(FWA-VBL)的特性,考察了溶液pH(2.0~8.0)、床层高度(1~3 cm)、进水浓度(20~80 mg·L-1)和进水流速(5~11 mL·min-1)等因素对固定床吸附特性的影响. 结果表明在溶液pH为2.0,床层高度为1 cm,进水浓度为80 mg·L-1和进水流速为5 mL·min-1时,吸附剂的最大吸附量为223.80 mg·g-1. BDST、Thomas和Yoon-Nelson模型均能很好地描述不同条件下动态吸附行为,相关系数均大于0.980. 同时,TiO2@酵母复合微球具有很好的再生性能,可以重复利用4次. |
| 英文摘要 |
| In this work, the adsorption potential of TiO2@yeast composite microspheres to remove Fluorescent Whitening Agent-VBL (FWA-VBL) from aqueous solution was investigated using fixed-bed adsorption column. The effects of pH(2.0-8.0), bed height (1-3 cm), inlet concentration (20-80 mg·L-1) and feed flow rate (5-11 mL·min-1) on the breakthrough characteristics of the adsorption system were determined. The results showed that the highest bed capacity of 223.80 mg·g-1 was obtained under the condition of pH 2.0, 80 mg·L-1 inlet dye concentration, 1.0 cm bed height and 5 mL·min-1 flow rate. The adsorption data were fitted to three well-established fixed-bed adsorption models, namely, BDST model, Thomas model and Yoon-Nelson model. The results fitted well to the three models with coefficients of correlation R2>0.980 in different conditions. The TiO2@yeast composite microspheres have desired regeneration ability and could be reused for four times. |
|
|
|
