Study on adsorption of Cr(Ⅵ) by functionalized magnetic Fe<sub>3</sub>O<sub>4</sub>-mPD/SP nanocomposites

Xinyu YANG; Jie WU; Jianting ZHANG; Chunxin WU; Deming ZHAO

doi:10.11949/0438-1157.20190488

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Study on adsorption of Cr(Ⅵ) by functionalized magnetic Fe₃O₄-mPD/SP nanocomposites

Separation engineering | 更新时间：2020-06-24

- Study on adsorption of Cr(Ⅵ) by functionalized magnetic Fe₃O₄-mPD/SP nanocomposites
- CIESC Journal Vol. 71, Issue 3, Pages: 1060-1071(2020)
- 作者机构：
  
  浙江工业大学化学工程学院，浙江杭州 310014
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190488
  CLC： X 78;TQ 209
- Received：08 May 2019，
  
  Revised：2020-01-07，
  
  Published：05 March 2020
- 稿件说明：
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杨鑫宇, 吴杰, 张建庭, 吴纯鑫, 赵德明. 功能化磁性纳米复合材料Fe₃O₄-mPD/SP吸附Cr(Ⅵ)研究[J]. 化工学报, 2020, 71(3): 1060-1071 DOI: 10.11949/0438-1157.20190488.

YANG Xinyu, WU Jie, ZHANG Jianting, WU Chunxin, ZHAO Deming. Study on adsorption of Cr(Ⅵ) by functionalized magnetic Fe₃O₄-mPD/SP nanocomposites[J]. CIESC Journal, 2020, 71(3): 1060-1071 DOI: 10.11949/0438-1157.20190488.
杨鑫宇, 吴杰, 张建庭, 吴纯鑫, 赵德明. 功能化磁性纳米复合材料Fe₃O₄-mPD/SP吸附Cr(Ⅵ)研究[J]. 化工学报, 2020, 71(3): 1060-1071 DOI: 10.11949/0438-1157.20190488. DOI：

YANG Xinyu, WU Jie, ZHANG Jianting, WU Chunxin, ZHAO Deming. Study on adsorption of Cr(Ⅵ) by functionalized magnetic Fe₃O₄-mPD/SP nanocomposites[J]. CIESC Journal, 2020, 71(3): 1060-1071 DOI: 10.11949/0438-1157.20190488. DOI：

摘要

在超声波条件下先制得纳米Fe

颗粒，再在超声波辐照下一步合成氨基、亚氨基和磺酸基修饰的功能化磁性纳米复合材料Fe

-mPD/SP（50∶50），采用TEM、XRD、IR、TGA、VSM及BET对其进行表征，考察了其对Cr(Ⅵ)的吸附性能，结果表明：溶液pH对Cr(Ⅵ) 吸附影响显著，pH=2时，吸附效果最好；吸附剂投加量、竞争性阴离子（Cl

，NO

，SO

）、温度等均会对吸附Cr(Ⅵ) 造成一定影响。等温吸附数据符合Freundlich模型，

=34.464 mg

1-(1/

)

·L

·g

-1

，

=3.861；对Cr(Ⅵ) 的吸附为自发过程，∆

0，∆

=73.368 J·mol

-1

·K

-1

，∆

=19.375 kJ·mol

-1

；准二级动力学方程能很好地描述Cr(Ⅵ) 在Fe

-mPD/SP（50∶50）上的吸附行为，

=1.324×10

-3

g·mg

-1

·min

-1

，

=77.157 mg·g

-1

；推测出吸附机理包括静电吸附，氧化还原和离子交换。

Abstract

Nano-Fe

particles are first synthesized under ultrasonic condition

and the ultrasonic enhanced functionalized nanocomposites Fe

-mPD/SP(50∶50) modified with amino

imino and sulfonic acid are synthesized in one step in presence of ultrasonic irradiation

which were characterized by TEM

XRD

TGA

VSM and BET. The adsorption properties of Cr(Ⅵ) were investigated

which show that the pH value of the solution has a significant effect on the adsorption of Cr(Ⅵ) by Fe

-mPD/SP(50∶50)

and the adsorption is best when pH=2. The amount of adsorbent

competitive anion(Cl

) and temperature all had effect on the adsorption of Cr(Ⅵ). The adsorption mechanism of Cr(Ⅵ) by Fe

-mPD/SP(50∶50) was discussed

which show that the quasi-second order kinetic equation can describe the adsorption behavior of Cr(Ⅵ) on Fe

-mPD/SP(50∶50) well

=1.324×10

-3

g·mg

-1

·min

-1

=77.157 mg·g

-1

; The isothermal adsorption data were in accordance with the Freundlich model

=34.464 mg

1-(1/

)

·L

·g

-1

=3.861. The adsorption of Cr(Ⅵ) is a spontaneous process

∆

0，∆

=73.368 J·mol

-1

·K

-1

∆

=19.375 kJ·mol

-1

. It is inferred that the adsorption mechanism includes electrostatic adsorption

redox and ion exchange.

关键词

Keywords

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⁰

Study on adsorption of Cr(Ⅵ) by functionalized magnetic Fe3O4-mPD/SP nanocomposites

DOI：10.11949/0438-1157.20190488

摘要

Abstract

关键词

Keywords

references

Study on adsorption of Cr(Ⅵ) by functionalized magnetic Fe₃O₄-mPD/SP nanocomposites