季銨型木質素的合成及其對AuCl<sub>4</sub><sup>-</sup>的吸附性能

張保平; 楊芳; 馬鐘琛; 郭美辰; 劉運

doi:10.13374/j.issn2095-9389.2017.10.009

季銨型木質素的合成及其對AuCl₄^-的吸附性能

doi: 10.13374/j.issn2095-9389.2017.10.009

張保平^1,2, ,,
楊芳^1,2,
馬鐘琛^1,2,
郭美辰^1,2,
劉運^1,2

1) 武漢科技大學鋼鐵冶金及資源利用省部共建教育部重點實驗室, 武漢 430081
2) 武漢科技大學省部共建耐火材料與冶金國家重點實驗室, 武漢 430081

基金項目:

教育部第47批留學回國人員科研啟動基金資助項目(FMRU201203)

詳細信息

中圖分類號: O636.2
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出版歷程
- 收稿日期: 2016-07-01

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

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

摘要

摘要: 以稻草為原料,經酚化、交聯和胺化后合成了季銨型木質素,并研究了其對AuCl₄^-的吸附性能.通過傅里葉紅外光譜(FT-IR)、掃描電鏡(SEM)和差熱-熱重分析(TG-DSC)對合成產物進行了表征,考察了AuCl₄^-初始濃度、鹽酸濃度和吸附時間對AuCl₄^-吸附效果的影響.研究結果表明,合成的產物為熱穩定性好且含有大量孔隙和表面粗糙的不規則塊狀季銨型木質素;在鹽酸濃度為0.5 mol·L^-1,AuCl₄^-初始濃度為6.0 mmol·L^-1,吸附100 h時AuCl₄^-的最大吸附容量為3.27 mol·kg^-1,在0.5 mol·L^-1鹽酸和1.0 mmol·L^-1 AuCl₄^-的條件下吸附達到平衡時間為360 min.經掃描電鏡和X射線衍射分析和傅里葉紅外光譜分析表明吸附后的AuCl₄^-被季銨型木質素中的酚羥基還原而以單質形態析出.
- 稻草 /
- 季銨型木質素 /
- 合成 /
- AuCl₄^- /
- 吸附性能
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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參考文獻(10)

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