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掺铁碳羟基磷灰石复合物对铅离子废水的吸附

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曾荣英, 罗春香, 龚道新, 唐文清, 冯泳兰, 彭刚. 掺铁碳羟基磷灰石复合物对铅离子废水的吸附[J]. 环境工程学报, 2015, 9(10): 4643-4649. doi: 10.12030/j.cjee.20151006
引用本文: 曾荣英, 罗春香, 龚道新, 唐文清, 冯泳兰, 彭刚. 掺铁碳羟基磷灰石复合物对铅离子废水的吸附[J]. 环境工程学报, 2015, 9(10): 4643-4649. doi: 10.12030/j.cjee.20151006
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Zeng Rongying, Luo Chunxiang, Gong Daoxing, Tang Wenqing, Feng Yonglan, Peng Gang. Adsorption of Pb(II) from aqueous solution using nano-ferriferrous oxide/carbonate hydroxyapatite composite[J]. Chinese Journal of Environmental Engineering, 2015, 9(10): 4643-4649. doi: 10.12030/j.cjee.20151006
Citation: Zeng Rongying, Luo Chunxiang, Gong Daoxing, Tang Wenqing, Feng Yonglan, Peng Gang. Adsorption of Pb(II) from aqueous solution using nano-ferriferrous oxide/carbonate hydroxyapatite composite[J]. Chinese Journal of Environmental Engineering, 2015, 9(10): 4643-4649. doi: 10.12030/j.cjee.20151006
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掺铁碳羟基磷灰石复合物对铅离子废水的吸附

  • 1.

    湖南农业大学资源环境学院, 长沙 410128

  • 2.

    衡阳师范学院化学与材料科学系, 衡阳 421008

  • 3.

    功能金属有机材料湖南省普通高等学校重点实验室, 衡阳 421008

  • 基金项目:

    湖南省自然科学基金资助项目(13JJ9018)

    湖南省重点建设学科资助

  • 中图分类号: X703.1

Adsorption of Pb(II) from aqueous solution using nano-ferriferrous oxide/carbonate hydroxyapatite composite

  • 1.

    College of Resources & Environment, Hunan Agricultural University, Changsha 410128, China

  • 2.

    Department of Chemistry and Materials Science, Hengyang Normal University, Hengyang 421008, China

  • 3.

    Key Laboratory of Functional Organometallic Materials of Hengyang Normal University, College of Hunan Province, Hengyang 421008, China

  • Fund Project:

  • 摘要: 采用废弃蛋壳和自制纳米Fe3O4为原材料,采用水热法制备Fe3O4/碳羟基磷灰石复合物(简称掺铁碳羟基磷灰石复合物,Fe-CHAP),将其用于吸附含Pb2+废水。通过BET比表面积、FTIR和XRD等表征手段对样品进行测试,分别探讨了影响吸附性能的主要因素,如pH、吸附剂用量、吸附时间、Pb2+初始浓度以及反应温度等。研究结果表明,在pH=5.0、0.03 g Fe-CHAP、150 mg/L Pb2+初始浓度、作用时间45 min和反应温度323 K等优化条件下,Fe-CHAP对Pb2+的去除率和吸附容量分别为98.59%和492.95mg/g。Langmuir等温模型较好地拟合了吸附实验数据,相关系数高达0.99,饱和吸附容量高达1 111.11 mg/g;准二级动力学模型较好地描述该吸附行为,相关系数高达0.999;热力学参数ΔG、ΔH和ΔS的计算值显示该吸附过程为自发吸热过程。
    Abstract: Fe3O4/carbonate hydroxyapatite(Fe-CHAP) composite was prepared via hydrothermal method by waste egg shells and Fe3O4 nanoparticles as raw materials. Fe-CHAP composite samples were used as sorbents to adsorb Pb2+ ions from aqueous solution. The Fe-CHAP was characterized by BET surface area, Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction. The effect of experimental parameters, such as pH,adsorbent dosage, contact time, initial Pb2+ concentration and temperature were examined. The results showed that the removal efficiency and adsorption capacity of Pb2+ on Fe-CHAP could get to 98.59% and 492.95 mg/g under the following conditions: pH of 3, adsorbent dosage of 0.03 g, the initial Pb2+ concentration of 150 mg/L, adsorption time of 45 min and temperature of 323 K, respectively. Equilibrium data agreed well with Langmuir isotherm (R2>0.99) and the maximum adsorption capacity of Pb2+ onto Fe-CHAP was found to be 1 111.11 mg/g. The pseudo-second order kinetic model was proposed to correlate the experimental data (R2>0.999). The thermodynamic parameters such as Gibb's free energy (ΔG), enthalpy (ΔH) and entropy (ΔS) were calculated and the results indicated that the overall adsorption process was spontaneous and endothermic.
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出版历程
  • 收稿日期:  2014-08-04
  • 刊出日期:  2015-10-14

掺铁碳羟基磷灰石复合物对铅离子废水的吸附

  • 1.  湖南农业大学资源环境学院, 长沙 410128
  • 2.  衡阳师范学院化学与材料科学系, 衡阳 421008
  • 3.  功能金属有机材料湖南省普通高等学校重点实验室, 衡阳 421008
  • 收稿日期:  2014-08-04
基金项目:

湖南省自然科学基金资助项目(13JJ9018)

湖南省重点建设学科资助

摘要: 采用废弃蛋壳和自制纳米Fe3O4为原材料,采用水热法制备Fe3O4/碳羟基磷灰石复合物(简称掺铁碳羟基磷灰石复合物,Fe-CHAP),将其用于吸附含Pb2+废水。通过BET比表面积、FTIR和XRD等表征手段对样品进行测试,分别探讨了影响吸附性能的主要因素,如pH、吸附剂用量、吸附时间、Pb2+初始浓度以及反应温度等。研究结果表明,在pH=5.0、0.03 g Fe-CHAP、150 mg/L Pb2+初始浓度、作用时间45 min和反应温度323 K等优化条件下,Fe-CHAP对Pb2+的去除率和吸附容量分别为98.59%和492.95mg/g。Langmuir等温模型较好地拟合了吸附实验数据,相关系数高达0.99,饱和吸附容量高达1 111.11 mg/g;准二级动力学模型较好地描述该吸附行为,相关系数高达0.999;热力学参数ΔG、ΔH和ΔS的计算值显示该吸附过程为自发吸热过程。

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