| 第 50 卷第 5 期 |  | Vol. 50 No. 5 | | 2020 年 10 月 | Oct 2020 |
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所属栏目：安全与环保
壳聚糖联合改性粉煤灰吸附废水中的亚甲基蓝 |
| 张新宇1，柴 涛1*，耿振香2，刘登登1，吴 凯1，张 行1
（1. 中北大学 环境与安全工程学院，山西 太原 030051；2. 太原工业学院，环境与安全工程系，山西 太原 030008） |
| 摘 要：为降低染料废水的处理成本，实现“以废治废”的目的，以壳聚糖和粉煤灰为原料，用NaOH溶液作为改性液制备壳聚糖联合改性粉煤灰吸附剂，探究对废水中亚甲基蓝的吸附性能并拟合其动力学方程。结果表明，当壳聚糖与粉煤灰联合吸附剂质量比为0.03时，对废水中亚甲基蓝的吸附效果较佳。通过设计正交实验考察各因素对吸附效率的影响程度，结果表明，对于50 mL的100 mg·L-1亚甲基蓝溶液的较优吸附条件为：温度为85 ℃、pH=6，加入5 g吸附剂吸附60 min。该吸附条件下，溶液中的亚甲基蓝去除效率大于95%，吸附过程符合准二级动力学模型。 |
| 关键词：壳聚糖；改性粉煤灰；亚甲基蓝；吸附动力学 |
| 中图分类号：X788 文献标识码：A 文章编号：1009-9212（2020）05-0068-05 |
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| Adsorption of Methylene Blue in Wastewater by Chitosan Combined with Modified Fly Ash |
| ZHANGX Xin-yu1, CHAI Tao1*, GENG Zhen-xiang2, LIU Deng-deng1, WU Kai1, ZHANG Xing1
(1. College of Environmental and Safety Engineering, North University of China, Taiyuan 030051, China; 2. Department of Environmental and Safety Engineering, Taiyuan Institution of Technology, Taiyuan 030008, China) |
| Abstract：In order to reduce the treatment cost of dye wastewater and realize the purpose of "treating waste with waste", in this experiment, chitosan and fly ash used as raw materials and NaOH solution as modifier to prepare chitosan modified fly ash adsorbent. Its adsorption performance on methylene blue in wastewater was explored and endeavored to fit its kinetic equation. The results showed that when the mass ratio of combined adsorbent was 0.03, the adsorption effect of methylene blue in wastewater was better. By means of orthogonal experiment, it was found that was better adsorption conditions for 50 mL of 100 mg·L-1 methylene blue solution were as followings: under the condition of temperature 85 ℃, pH=6, adding 5 g adsorbent for 60 min, the removal efficiency of methylene blue in the solution was higher than 95%, and the adsorption process conformed to the pseudo second order kinetic model. |
| Key words：chitosan; modified fly ash; methylene blue; adsorption kinetics |
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基金项目：中北大学研究生科技立项（20191662）。
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作者简介：张新宇（1995—），男，山西长治人，硕士研究生，研究方向：污水处理（E-mail：2080598844@qq.com）。
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联 系 人：柴涛，教授，研究方向：超临界水氧化技术、 微生物技术等（E-mail：lyc2ct@sina.com）。
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收稿日期：2020-08-15
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