Synthesis of quaternary ammonium lignin and its adsorption properties on AuCl<sub>4</sub><sup>-</sup>

ZHANG Bao-ping; YANG Fang; MA Zhong-chen; GUO Mei-chen; LIU Yun

doi:10.13374/j.issn2095-9389.2017.10.009

Volume 39 Issue 10

Oct. 2017

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ZHANG Bao-ping, YANG Fang, MA Zhong-chen, GUO Mei-chen, LIU Yun. Synthesis of quaternary ammonium lignin and its adsorption properties on AuCl4-[J]. Chinese Journal of Engineering, 2017, 39(10): 1518-1524. doi: 10.13374/j.issn2095-9389.2017.10.009

Citation:

ZHANG Bao-ping, YANG Fang, MA Zhong-chen, GUO Mei-chen, LIU Yun. Synthesis of quaternary ammonium lignin and its adsorption properties on AuCl₄^-[J]. Chinese Journal of Engineering, 2017, 39(10): 1518-1524. doi: 10.13374/j.issn2095-9389.2017.10.009

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Synthesis of quaternary ammonium lignin and its adsorption properties on AuCl₄^-

doi: 10.13374/j.issn2095-9389.2017.10.009

ZHANG Bao-ping^{1,2
,
,},
YANG Fang^1,2,
MA Zhong-chen^1,2,
GUO Mei-chen^1,2,
LIU Yun^1,2

1) Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China
2) State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China

Received Date: 2016-07-01

Abstract

Abstract

Quaternary ammonium lignin was synthesized from rice straw after phenolization, crosslinking and amination. Its adsorption properties for AuCl₄^- were investigated. The adsorbent was characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), thermogravimetric analysis and differential scanning calorimetry (TG-DSC). The effects of initial concentration of AuCl₄^-, concentration of hydrochloric acid and adsorption time on the effect of adsorption for AuCl₄^- were discussed. The results show that the quaternary ammonium lignin has excellent thermal stability and its surface is irregularly rough and porous. The maximum adsorption capacity is 3.27 mol·kg^-1 when the concentration of hydrochloric acid is 0.5 mol·L^-1, the initial concentration of AuCl₄^- is 6.0 mmol·L^-1 and the adsorption time is 100 h. The equilibrium time of adsorption for AuCl₄^- is 360 min when the concentration of AuCl₄^- is 1 mmol·L^-1, the concentration of hydrochloric acid is 0.5 mol·L^-1. Moreover, AuCl₄^- was reduced to elemental gold by the phenolic hydroxyl group of the quaternary ammonium lignin through the analyses of XRD, SEM and FT-IR.
- rice straw,
- quaternary ammonium lignin,
- synthesis,
- AuCl₄^-,
- adsorption properties

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References(10)

References

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