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浮石负载纳米零价铁去除水相中的砷(Ⅴ)

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杨艺琳, 周孜迈, 邓文娜, 孙艳秋, 王悦, 柳听义, 王中良. 浮石负载纳米零价铁去除水相中的砷(Ⅴ)[J]. 环境化学, 2017, 36(3): 598-607. doi: 10.7524/j.issn.0254-6108.2017.03.2016051301
引用本文: 杨艺琳, 周孜迈, 邓文娜, 孙艳秋, 王悦, 柳听义, 王中良. 浮石负载纳米零价铁去除水相中的砷(Ⅴ)[J]. 环境化学, 2017, 36(3): 598-607. doi: 10.7524/j.issn.0254-6108.2017.03.2016051301
shu
YANG Yilin, ZHOU Zimai, DENG Wenna, SUN Yanqiu, WANG Yue, LIU Tingyi, WANG Zhongliang. Removal of arsenic (V) from aqueous solutions using improved nanoscale zero-valent iron on pumice[J]. Environmental Chemistry, 2017, 36(3): 598-607. doi: 10.7524/j.issn.0254-6108.2017.03.2016051301
Citation: YANG Yilin, ZHOU Zimai, DENG Wenna, SUN Yanqiu, WANG Yue, LIU Tingyi, WANG Zhongliang. Removal of arsenic (V) from aqueous solutions using improved nanoscale zero-valent iron on pumice[J]. Environmental Chemistry, 2017, 36(3): 598-607. doi: 10.7524/j.issn.0254-6108.2017.03.2016051301
shu

浮石负载纳米零价铁去除水相中的砷(Ⅴ)

  • 1.

    天津师范大学, 天津市水资源与水环境重点实验室, 天津, 300387;

  • 2.

    天津师范大学, 城市与环境科学学院, 天津, 300387

  • 基金项目:

    国家自然科学基金（21307090），天津市高等学校创新团队建设计划（TD12-5037）和天津市科委应用基础与前沿技术研究计划重点项目（14JCZDJC41000）资助.

Removal of arsenic (V) from aqueous solutions using improved nanoscale zero-valent iron on pumice

  • 1.

    Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin, 300387, China;

  • 2.

    College of Urban and Environmental Science, Tianjin Normal University, Tianjin, 300387, China

  • Fund Project: Supported by the National Natural Science Foundation of China (21307090), the Innovation Team Training Plan of the Tianjin Education Committee (TD12-5037), and Tianjin Municipal Natural Science Foundation of China (14JCZDJC41000).

  • 摘要: 废水中的砷是最具毒性的环境污染物之一.为了更好地利用纳米零价铁（Nanoscale Zero-Valent Iron，NZVI）修复水体污染，本文进行了浮石负载NZVI去除水相中As（V）的研究.利用环境扫描电镜（SEM）和透射电子显微镜（TEM）对浮石负载纳米零价铁（P-NZVI）的形态和粒度进行表征分析，根据批试验和间歇试验探究反应条件对去除效果的影响，并通过对照P-NZVI与As（V）溶液反应前后的样品的X射线光电子能谱（XPS），结合XPS Fe2p和XPS As3d窄轨道图谱，探讨P-NZVI对水相中As（V）的去除机理.研究结果表明，制备所得NZVI颗粒平均粒径30.6 nm，分散在浮石表面.利用BET-N2法检测得到P-NZVI的比表面积为32.2 m2·g-1（NZVI含量0.28 g，质量比7.7%）.P-NZVI对As（V）的去除率随初始pH值、反应温度、As（V）初始质量浓度的升高而降低，反应符合准一级和准二级动力学方程.初始As（V）浓度为100 mg·L-1时，P-NZVI的平衡时吸附量为35.7 mg·g-1.P-NZVI对As（V）的去除机理包括吸附、沉淀和共沉淀作用.
    Abstract: Nanoscale zero-valent Iron (NZVI) was successfully coated onto pumice support (P-NZVI). It was used for the removal of arsenic (V), which is one of the most toxic waste-water pollutants. P-NZVI characterization by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) revealed that NZVI was dispersed on pumice. NZVI particles were nearly spherical in shape with a mean diameter of 30.6 nm, which demonstrated that pumice was effective in preventing NZVI particles from agglomerating. P-NZVI with a 7.7% NZVI mass fraction had a specific surface area (SBET) of 32.2 m2·g-1. The influence of experimental factors on As (V) removal was investigated by batch experiments. The results showed that As (V) was removed by P-NZVI adsorption rapidly with high removal rate (more than 99%) over a wide range of pH (3.10-12.54) and concentrations (20-100 mg·L-1). The removal mechanism of As (V) by P-NZVI was investigated by comparing the X-ray photo-electron spectroscopic intensity (including XPS Fe2p and XPS As3d) of the samples before and after reacting with P-NZVI. Our results indicated that P-NZVI might be an effective material for both in situ and ex situ remediation of As(V).
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  • 收稿日期:  2016-05-13
  • 刊出日期:  2017-03-15
杨艺琳, 周孜迈, 邓文娜, 孙艳秋, 王悦, 柳听义, 王中良. 浮石负载纳米零价铁去除水相中的砷(Ⅴ)[J]. 环境化学, 2017, 36(3): 598-607. doi: 10.7524/j.issn.0254-6108.2017.03.2016051301
引用本文: 杨艺琳, 周孜迈, 邓文娜, 孙艳秋, 王悦, 柳听义, 王中良. 浮石负载纳米零价铁去除水相中的砷(Ⅴ)[J]. 环境化学, 2017, 36(3): 598-607. doi: 10.7524/j.issn.0254-6108.2017.03.2016051301
shu
YANG Yilin, ZHOU Zimai, DENG Wenna, SUN Yanqiu, WANG Yue, LIU Tingyi, WANG Zhongliang. Removal of arsenic (V) from aqueous solutions using improved nanoscale zero-valent iron on pumice[J]. Environmental Chemistry, 2017, 36(3): 598-607. doi: 10.7524/j.issn.0254-6108.2017.03.2016051301
Citation: YANG Yilin, ZHOU Zimai, DENG Wenna, SUN Yanqiu, WANG Yue, LIU Tingyi, WANG Zhongliang. Removal of arsenic (V) from aqueous solutions using improved nanoscale zero-valent iron on pumice[J]. Environmental Chemistry, 2017, 36(3): 598-607. doi: 10.7524/j.issn.0254-6108.2017.03.2016051301
shu

浮石负载纳米零价铁去除水相中的砷(Ⅴ)

  • 1.  天津师范大学, 天津市水资源与水环境重点实验室, 天津, 300387;
  • 2.  天津师范大学, 城市与环境科学学院, 天津, 300387
  • 收稿日期:  2016-05-13
基金项目:

国家自然科学基金（21307090），天津市高等学校创新团队建设计划（TD12-5037）和天津市科委应用基础与前沿技术研究计划重点项目（14JCZDJC41000）资助.

摘要: 废水中的砷是最具毒性的环境污染物之一.为了更好地利用纳米零价铁（Nanoscale Zero-Valent Iron，NZVI）修复水体污染，本文进行了浮石负载NZVI去除水相中As（V）的研究.利用环境扫描电镜（SEM）和透射电子显微镜（TEM）对浮石负载纳米零价铁（P-NZVI）的形态和粒度进行表征分析，根据批试验和间歇试验探究反应条件对去除效果的影响，并通过对照P-NZVI与As（V）溶液反应前后的样品的X射线光电子能谱（XPS），结合XPS Fe2p和XPS As3d窄轨道图谱，探讨P-NZVI对水相中As（V）的去除机理.研究结果表明，制备所得NZVI颗粒平均粒径30.6 nm，分散在浮石表面.利用BET-N2法检测得到P-NZVI的比表面积为32.2 m2·g-1（NZVI含量0.28 g，质量比7.7%）.P-NZVI对As（V）的去除率随初始pH值、反应温度、As（V）初始质量浓度的升高而降低，反应符合准一级和准二级动力学方程.初始As（V）浓度为100 mg·L-1时，P-NZVI的平衡时吸附量为35.7 mg·g-1.P-NZVI对As（V）的去除机理包括吸附、沉淀和共沉淀作用.

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