| NaOH改性稻秆对亚甲基蓝染料吸附性能的研究 |
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| 引用本文： | 潘云霞,刘澜,郑怀礼.NaOH改性稻秆对亚甲基蓝染料吸附性能的研究[J].农机化研究,2012,34(8):200-203. |
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| 作者姓名： | 潘云霞 刘澜 郑怀礼 |
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| 作者单位： | 1. 西南大学工程技术学院,重庆,400715
2. 重庆大学三峡库区生态环境教育部重点实验室,重庆,400045 |
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| 基金项目： | 西南大学博士基金，中央高校基本科研业务费专项资金项目 |
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| 摘 要： | 为解决农村稻秆的资源化利用问题,将稻秆用NaOH改性做吸附剂处理亚甲基蓝染料废水;考察pH值、吸附剂投加量、染料浓度和温度对染料吸附性能的影响;分析改性稻秆对亚甲基蓝染料的吸附动力学过程。研究结果表明,亚甲基蓝浓度为150mg/L,pH值为12、吸附剂投加量为4g/L时,改性稻秆对亚甲基蓝染料有很好的去除效果,染料的吸附率达到98.1%;改性稻秆对亚甲基蓝染料的吸附符合Freundlich等温模型,最大吸附量为52.910mg/g,升高温度能够增加吸附剂对亚甲基蓝染料的吸附效果;改性稻秆吸附亚甲基蓝是一个快速吸附过程,符合伪二级吸附动力学方程。
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| 关 键 词： | 稻秆 NaOH改性 亚甲基蓝染料 吸附 动力学 热力学 |
Adsorption of Methylene Blue from Aqueous Solution by NaOH-modified Rice Straw |
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| Pan Yunxia
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Liu Lan
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Zheng Huaili.Adsorption of Methylene Blue from Aqueous Solution by NaOH-modified Rice Straw[J].Journal of Agricultural Mechanization Research,2012,34(8):200-203. |
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| Authors: | Pan Yunxia Liu Lan Zheng Huaili |
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| Institution: | 1.College of Engineering and Technology,Southwest University,Chongqing 400715,China;2.Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment,Ministry of Education,Chongqing University,Chongqing 400045,China) |
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| Abstract: | To solve rice straw residue recyclable,rice straw residue was modified by NaOH to remove methylene blue(MB) from aqueous solution.Its adsorption ability and adsorption kinesics was investigated through batch experiment.The results indicated that NaOH-modified rice straw can effectively remove MB from aqueous solution with 150 mg/L of MB concentration,4 g/L of adsorbent dosage and 12 of pH value.The removal rate of MB was reach to 98.1%.The adsorption data fitted the Freundlich adsorption isotherm and the maximum adsorption capacity was 242.11mg/g.The adsorption ability was increased with raising temperature.NaOH-modified rice straw adsorption of MB solution was a fast adsorption process and fitted pseudo-second-order reaction equation. |
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| Keywords: | rice straw NaOH-modified methylene blue adsorption kinetics thermodynamics |
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