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锆改性铝氧化物对水中磷的吸附特性

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雷行, 杨雪, 刘婷, 付军, 吴鹍. 锆改性铝氧化物对水中磷的吸附特性[J]. 环境工程学报, 2018, 12(5): 1389-1396. doi: 10.12030/j.cjee.201710107
引用本文: 雷行, 杨雪, 刘婷, 付军, 吴鹍. 锆改性铝氧化物对水中磷的吸附特性[J]. 环境工程学报, 2018, 12(5): 1389-1396. doi: 10.12030/j.cjee.201710107
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LEI Hang, YANG Xue, LIU Ting, FU Jun, WU Kun. Adsorption characteristics of phosphorus removal from water by using zirconium-modified aluminum oxide[J]. Chinese Journal of Environmental Engineering, 2018, 12(5): 1389-1396. doi: 10.12030/j.cjee.201710107
Citation: LEI Hang, YANG Xue, LIU Ting, FU Jun, WU Kun. Adsorption characteristics of phosphorus removal from water by using zirconium-modified aluminum oxide[J]. Chinese Journal of Environmental Engineering, 2018, 12(5): 1389-1396. doi: 10.12030/j.cjee.201710107
shu

锆改性铝氧化物对水中磷的吸附特性

  • 1.

    西北农林科技大学资源环境学院，杨凌 712100

  • 2.

    博天环境股份有限公司陕西分公司，西安 710065

  • 3.

    环境保护部环境发展中心科技处，北京 100029

  • 4.

    西安建筑科技大学环境与市政工程学院，西安 710055

  • 基金项目:

    国家自然科学基金资助项目（51578440，51208415）

    陕西省教育厅重点实验项目（14JS042）

    国家水体污染控制与治理科技重大专项（2014ZX07510-001）

Adsorption characteristics of phosphorus removal from water by using zirconium-modified aluminum oxide

  • 1.

    College of Resources and Environment, Northwest A&F University, Yangling 712100, China

  • 2.

    Botian Environmental Limited by Share Ltd.Shaanxi Branch, Xi'an 710065, China

  • 3.

    Office for Science and Technology of Environmental Development Centre of Ministry of Environmental Protection, Beijing 100029, China

  • 4.

    School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China

  • Fund Project:

  • 摘要: 采用共沉淀法制备锆改性铝氧化物。在研究其对水中磷吸附特性的基础上，结合SEM-EDS、XRD、FTIR和XPS等表征手段，分析吸附剂的结构组成以及反应前后的表面基团变化，探讨吸附除磷的机理。结果表明：Power动力学模型和Langmuir等温线模型可以很好地描述锆改性铝氧化物对磷的吸附特征；在投加量为0.3 g·L-1、溶液pH为7时，磷的饱和吸附量为76.63 mg·g-1；pH=4~6时，吸附剂除磷效果较好，在偏碱性环境下，磷吸附量明显降低；Cl- 和SiO32-对磷的吸附有较强的抑制作用，且干扰效果随着阴离子浓度的升高而加强。通过材料表征结果可知，吸附剂呈无定型结构，表面含有丰富的羟基。该吸附剂的除磷机制主要为表面络合和离子交换作用。
    Abstract: Zirconium-modified aluminum oxide (ZMAO) was prepared by the co-precipitation method. Batch experiments were conducted to investigate the adsorption properties of phosphorus (P) removal. In addition, the surface characteristics of this adsorbent were investigated by using the methods of SEM-EDS, XRD, FTIR and XPS. The results showed that the kinetic data followed the Power model very well and the equilibrium data could be satisfactorily described by the Langmuir isotherm model. The saturated adsorption capacity of P was determined to be 76.63 mg·g-1 at pH=7.0 with a dosage of 0.3 g·L-1. The optimal P removal performance was achieved in the pH range of 4 to 6, while the P adsorption amounts were decreased obviously in the alkaline conditions. The presence of chloride ions or silicate could bring adverse effects on the adsorption of P because of the competitive adsorption mechanisms. Moreover, the interfering influences became more intense due to the increased concentrations of anions. The results of SEM, FTIR and XPS analysis showed that this adsorbent has an amorphous structure and a plenty of hydroxyl groups on its surface. The mechanisms of P adsorption mainly include surface complexation and ion exchange.
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  • 刊出日期:  2018-05-19

锆改性铝氧化物对水中磷的吸附特性

  • 1. 西北农林科技大学资源环境学院，杨凌 712100
  • 2. 博天环境股份有限公司陕西分公司，西安 710065
  • 3. 环境保护部环境发展中心科技处，北京 100029
  • 4. 西安建筑科技大学环境与市政工程学院，西安 710055
基金项目:

国家自然科学基金资助项目（51578440，51208415）

陕西省教育厅重点实验项目（14JS042）

国家水体污染控制与治理科技重大专项（2014ZX07510-001）

摘要: 采用共沉淀法制备锆改性铝氧化物。在研究其对水中磷吸附特性的基础上，结合SEM-EDS、XRD、FTIR和XPS等表征手段，分析吸附剂的结构组成以及反应前后的表面基团变化，探讨吸附除磷的机理。结果表明：Power动力学模型和Langmuir等温线模型可以很好地描述锆改性铝氧化物对磷的吸附特征；在投加量为0.3 g·L-1、溶液pH为7时，磷的饱和吸附量为76.63 mg·g-1；pH=4~6时，吸附剂除磷效果较好，在偏碱性环境下，磷吸附量明显降低；Cl- 和SiO32-对磷的吸附有较强的抑制作用，且干扰效果随着阴离子浓度的升高而加强。通过材料表征结果可知，吸附剂呈无定型结构，表面含有丰富的羟基。该吸附剂的除磷机制主要为表面络合和离子交换作用。

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