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改性钛白石膏对阳离子染料罗丹明B的吸附性能

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蔡宽, 阮长城, 李瑞萍, 刘立明, 赵晓蓉, 黄应平. 改性钛白石膏对阳离子染料罗丹明B的吸附性能[J]. 环境工程学报, 2015, 9(7): 3184-3190. doi: 10.12030/j.cjee.20150718
引用本文: 蔡宽, 阮长城, 李瑞萍, 刘立明, 赵晓蓉, 黄应平. 改性钛白石膏对阳离子染料罗丹明B的吸附性能[J]. 环境工程学报, 2015, 9(7): 3184-3190. doi: 10.12030/j.cjee.20150718
shu
Cai Kuan, Ruan Changcheng, Li Ruiping, Liu Liming, Zhao Xiaorong, Huang Yingping. Adsorption characteristics of cationic dye RhB on modified titanium gypsum[J]. Chinese Journal of Environmental Engineering, 2015, 9(7): 3184-3190. doi: 10.12030/j.cjee.20150718
Citation: Cai Kuan, Ruan Changcheng, Li Ruiping, Liu Liming, Zhao Xiaorong, Huang Yingping. Adsorption characteristics of cationic dye RhB on modified titanium gypsum[J]. Chinese Journal of Environmental Engineering, 2015, 9(7): 3184-3190. doi: 10.12030/j.cjee.20150718
shu

改性钛白石膏对阳离子染料罗丹明B的吸附性能

  • 1.

    三峡地区地质灾害与生态环境湖北省协同创新中心, 宜昌 443002

  • 2.

    三峡库区生态环境教育部工程研究中心, 三峡大学, 宜昌 443002

  • 基金项目:

    国家"863"高技术研究发展计划资助项目(2012AA06A111-4)

    国家自然科学基金资助项目(21207079,21307073)

  • 中图分类号: X712

Adsorption characteristics of cationic dye RhB on modified titanium gypsum

  • 1.

    Engineering Research Center of Eco-Environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang 443002, China

  • 2.

    Collaborative Innovation Center for Geo-Hazards and Eco-Environment in Three Gorges Area, Yichang 443002, China

  • Fund Project:

  • 摘要: 通过不同温度煅烧改性实验比较,选择用800℃煅烧的钛白石膏作为吸附剂,研究其对阳离子染料罗丹明B(Rhodamine B,RhB)的吸附特性。利用XRD,SEM,BET对改性钛白石膏进行表征,考察了溶液pH,温度,接触时间,投加量对吸附的影响。结果表明,当RhB溶液质量浓度为9.58 mg/L,pH值为7.0,吸附剂投加量为2 g/L,吸附时间为150 min时,改性钛白石膏对RhB的最大吸附量为2.3 mg/g,较原土提高了140.1%左右。溶液温度和吸附剂投加量对钛白石膏吸附RhB吸附有很大的影响。利用准一阶,准二阶动力学模型对吸附数据进行模拟,发现该吸附过程更符合准二阶动力学模型,Langmuir和Freundlich两种吸附等温模型都能较好地描述改性钛白石膏吸附RhB的过程。通过热力学计算,得到△H0为18.5 kJ/mol,△G0<0,表明该吸附反应为自发进行的吸热反应。
    Abstract: By comparing the different modified methods,the titanium gypsum calcinated at 800℃ was chosen as an adsorbent to study its adsorption characteristics with Rhodamine B (RhB).The prepared titanium gypsum was characterized by X-ray diffraction (XRD),scanning electron microscope (SEM) and BET.The effects of pH,temperature,contact time and adsorbent dosage on RhB adsorption were investigated.The maximum uptake of 9.58 mg/L RhB was 2.3 mg/g with 2 g/L adsorbent,150 min contact time and initial pH value 7.0.which was improved about 140.1% over the original soil.Temperature and adsorbent dosage showed great effect on the adsorption process.Adsorption process well fitted the Langmuir isotherm model and the pseudo second-order kinetics model.The thermodynamic parameters such as enthalpy change △H0 (18.5 kJ/mol > 0) and free energy change (△G0 < 0) indicated that the adsorption was a spontaneous and endothermic process.
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  • 收稿日期:  2014-09-04
  • 刊出日期:  2015-07-02
蔡宽, 阮长城, 李瑞萍, 刘立明, 赵晓蓉, 黄应平. 改性钛白石膏对阳离子染料罗丹明B的吸附性能[J]. 环境工程学报, 2015, 9(7): 3184-3190. doi: 10.12030/j.cjee.20150718
引用本文: 蔡宽, 阮长城, 李瑞萍, 刘立明, 赵晓蓉, 黄应平. 改性钛白石膏对阳离子染料罗丹明B的吸附性能[J]. 环境工程学报, 2015, 9(7): 3184-3190. doi: 10.12030/j.cjee.20150718
shu
Cai Kuan, Ruan Changcheng, Li Ruiping, Liu Liming, Zhao Xiaorong, Huang Yingping. Adsorption characteristics of cationic dye RhB on modified titanium gypsum[J]. Chinese Journal of Environmental Engineering, 2015, 9(7): 3184-3190. doi: 10.12030/j.cjee.20150718
Citation: Cai Kuan, Ruan Changcheng, Li Ruiping, Liu Liming, Zhao Xiaorong, Huang Yingping. Adsorption characteristics of cationic dye RhB on modified titanium gypsum[J]. Chinese Journal of Environmental Engineering, 2015, 9(7): 3184-3190. doi: 10.12030/j.cjee.20150718
shu

改性钛白石膏对阳离子染料罗丹明B的吸附性能

  • 1.  三峡地区地质灾害与生态环境湖北省协同创新中心, 宜昌 443002
  • 2.  三峡库区生态环境教育部工程研究中心, 三峡大学, 宜昌 443002
  • 收稿日期:  2014-09-04
基金项目:

国家"863"高技术研究发展计划资助项目(2012AA06A111-4)

国家自然科学基金资助项目(21207079,21307073)

摘要: 通过不同温度煅烧改性实验比较,选择用800℃煅烧的钛白石膏作为吸附剂,研究其对阳离子染料罗丹明B(Rhodamine B,RhB)的吸附特性。利用XRD,SEM,BET对改性钛白石膏进行表征,考察了溶液pH,温度,接触时间,投加量对吸附的影响。结果表明,当RhB溶液质量浓度为9.58 mg/L,pH值为7.0,吸附剂投加量为2 g/L,吸附时间为150 min时,改性钛白石膏对RhB的最大吸附量为2.3 mg/g,较原土提高了140.1%左右。溶液温度和吸附剂投加量对钛白石膏吸附RhB吸附有很大的影响。利用准一阶,准二阶动力学模型对吸附数据进行模拟,发现该吸附过程更符合准二阶动力学模型,Langmuir和Freundlich两种吸附等温模型都能较好地描述改性钛白石膏吸附RhB的过程。通过热力学计算,得到△H0为18.5 kJ/mol,△G0<0,表明该吸附反应为自发进行的吸热反应。

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