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两种盐复合改性活性氧化铝对水中氟的吸附特性

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段颖, 杨琰琰, 张小凤, 王晨晨, 徐微, 李学德. 两种盐复合改性活性氧化铝对水中氟的吸附特性[J]. 环境化学, 2014, 33(11): 1950-1956. doi: 10.7524/j.issn.0254-6108.2014.11.005
引用本文: 段颖, 杨琰琰, 张小凤, 王晨晨, 徐微, 李学德. 两种盐复合改性活性氧化铝对水中氟的吸附特性[J]. 环境化学, 2014, 33(11): 1950-1956. doi: 10.7524/j.issn.0254-6108.2014.11.005
shu
DUAN Ying, YANG Yanyan, ZHANG Xiaofeng, WANG Chenchen, XU Wei, LI Xuede. Adsorption characteristics of floride on activated alumina modified with ferric and aluminum salt[J]. Environmental Chemistry, 2014, 33(11): 1950-1956. doi: 10.7524/j.issn.0254-6108.2014.11.005
Citation: DUAN Ying, YANG Yanyan, ZHANG Xiaofeng, WANG Chenchen, XU Wei, LI Xuede. Adsorption characteristics of floride on activated alumina modified with ferric and aluminum salt[J]. Environmental Chemistry, 2014, 33(11): 1950-1956. doi: 10.7524/j.issn.0254-6108.2014.11.005
shu

两种盐复合改性活性氧化铝对水中氟的吸附特性

  • 1.

    安徽农业大学资源与环境学院, 农业部合肥农业环境科学观测实验站, 合肥, 230036

  • 基金项目:

    国家863课题(2012AA062605) 资助.

Adsorption characteristics of floride on activated alumina modified with ferric and aluminum salt

  • 1.

    School of Resource and Environment, Anhui Agricultural University; Observation Station of the Agri-environment in Hefei, Ministry of Agriculture, Hefei, 230036, China

  • Fund Project:

  • 摘要: 采用Fe2(SO4)3和Al2(SO4)3两种盐对活性氧化铝进行改性,通过静态吸附实验,研究了改性活性氧化铝对水中氟离子的吸附特性及影响因素.改性后的活性氧化铝吸附容量显著提高,25 ℃下吸附容量达到6.25 mg·g-1.改性活性氧化铝对氟的吸附动力学符合拟二级动力学模型,吸附等温线更符合Langmuir等温吸附规律.吸附过程ΔG0H0 > 0、ΔS0 > 0,表明改性吸附剂对氟的吸附是自发的,是吸热、熵增加的反应.吸附最佳pH值为6,吸附过程中,共存PO43-对吸附效果影响最大.
    Abstract: Activated alumina was modified with Fe2(SO4)3 and Al2(SO4)3 in this study. The maximum sorption capacity of modified activated alumina for fluoride was 6.25 mg·g-1 at 298 K, significantly higher than the unmodified absorbent. The fluoride adsorption kinetics on the modified activated alumina was well described by the pseudo-second-order kinetic model. The fluoride adsorption on the modified activated alumina was consistent with the Langmuir model. During the adsorption, ΔG0H0 > 0,ΔS0 > 0. It indicated that the adsorption of fluoride is a spontaneous and endothermic process. Maximum fluoride removal occurred at pH 6. Fluoride sorption was mainly influenced by the presence of PO43-.
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  • 收稿日期:  2014-01-03
  • 刊出日期:  2014-11-15
段颖, 杨琰琰, 张小凤, 王晨晨, 徐微, 李学德. 两种盐复合改性活性氧化铝对水中氟的吸附特性[J]. 环境化学, 2014, 33(11): 1950-1956. doi: 10.7524/j.issn.0254-6108.2014.11.005
引用本文: 段颖, 杨琰琰, 张小凤, 王晨晨, 徐微, 李学德. 两种盐复合改性活性氧化铝对水中氟的吸附特性[J]. 环境化学, 2014, 33(11): 1950-1956. doi: 10.7524/j.issn.0254-6108.2014.11.005
shu
DUAN Ying, YANG Yanyan, ZHANG Xiaofeng, WANG Chenchen, XU Wei, LI Xuede. Adsorption characteristics of floride on activated alumina modified with ferric and aluminum salt[J]. Environmental Chemistry, 2014, 33(11): 1950-1956. doi: 10.7524/j.issn.0254-6108.2014.11.005
Citation: DUAN Ying, YANG Yanyan, ZHANG Xiaofeng, WANG Chenchen, XU Wei, LI Xuede. Adsorption characteristics of floride on activated alumina modified with ferric and aluminum salt[J]. Environmental Chemistry, 2014, 33(11): 1950-1956. doi: 10.7524/j.issn.0254-6108.2014.11.005
shu

两种盐复合改性活性氧化铝对水中氟的吸附特性

  • 1. 安徽农业大学资源与环境学院, 农业部合肥农业环境科学观测实验站, 合肥, 230036
  • 收稿日期:  2014-01-03
基金项目:

国家863课题(2012AA062605) 资助.

摘要: 采用Fe2(SO4)3和Al2(SO4)3两种盐对活性氧化铝进行改性,通过静态吸附实验,研究了改性活性氧化铝对水中氟离子的吸附特性及影响因素.改性后的活性氧化铝吸附容量显著提高,25 ℃下吸附容量达到6.25 mg·g-1.改性活性氧化铝对氟的吸附动力学符合拟二级动力学模型,吸附等温线更符合Langmuir等温吸附规律.吸附过程ΔG0H0 > 0、ΔS0 > 0,表明改性吸附剂对氟的吸附是自发的,是吸热、熵增加的反应.吸附最佳pH值为6,吸附过程中,共存PO43-对吸附效果影响最大.

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