Chemical modification of lignin and its adsorption to AuCl<sub>4</sub><sup>-</sup>

ZHANG Baoping; MA Zhongchen; LIU Yun; GUO Meichen; YANG Fang

doi:10.11949/j.issn.0438-1157.20161453

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Chemical modification of lignin and its adsorption to AuCl₄^-

更新时间：2025-12-10

- Chemical modification of lignin and its adsorption to AuCl₄^-
- CIESC Journal Issue 5, Pages: 1946-1953(2017)
- 作者机构：
  
  1. 武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北,武汉,430081
  2. 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北,武汉,430081
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20161453
  CLC： F836
- Online First：05 May 2017，
  
  Published：05 May 2017
- 稿件说明：
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ZHANG Baoping, MA Zhongchen, LIU Yun, et al. Chemical modification of lignin and its adsorption to AuCl₄^-[J]. CIESC Journal, 2017, (5): 1946-1953. DOI: 10.11949/j.issn.0438-1157.20161453.
DOI：

ZHANG Baoping, MA Zhongchen, LIU Yun, et al. Chemical modification of lignin and its adsorption to AuCl₄^-[J]. CIESC Journal, 2017, (5): 1946-1953. DOI: 10.11949/j.issn.0438-1157.20161453. DOI：

摘要

以稻草为原料，经预处理、酚化、交联、氯化、胺化、季铵化制备了一种新型的化学改性木质素并对其进行了FTIR，SEM，TG-DSC分析，考察了AuCl4-初始浓度、吸附时间、盐酸浓度对化学改性木质素吸附AuCl4-效果的影响，探讨了吸附过程的机理。结果表明，制备的化学改性木质素表面致密且在217℃以下具有良好的热稳定性和含有大量酚羟基及胺基。当AuCl4-初始浓度为8.0 mmol·L-1时吸附容量达到最大，为784.50 mg·g-1，在AuCl4-初始浓度为1.0 mmol·L-1时吸附达到平衡的时间为600 min，当盐酸浓度为0.5 mol·L-1和AuCl4-初始浓度为1.0 mmol·L-1时吸附率为98%。吸附过程遵循准二级动力学模型，吸附等温模型与Langmuir拟合较好。AuCl4-被化学改性木质素中的酚羟基以金单质的形态还原出来。

Abstract

The new chemically modified lignin was prepared based on straw by pretreament

phenolation

polycondensation

chloration

amination and quaternarization reaction and was analyzed though FTIR

SEM and TG-DSC. The adsorption effects of the initial concentration of AuCl4-

adsorption time and concentration of hydrochloric acid on AuCl4- were investigated. Furthermore

the mechanism of adsorption was explored. The results indicated that chemically modified straw lignin was of excellent thermal stability below 217℃ and had plenty of primary amines and hydroxyls. The maximum adsorption capacity was 784.50 mg·g-1 when the initial concentration of AuCl4- was 8.0 mmol·L-1

the equilibrium adsorption time was 600 min when the initial concentration of AuCl4- was 1.0 mmol·L-1 and the adsorption ratio was 98% when the concentration of hydrochloric acid was 0.5 mol·L-1 and the initial concentration of AuCl4- was 1.0 mmol·L-1. Equilibrium experiments and kinetics studies fitted well with the Langmuir model and pseudo-second-order model

respectively. Finally

the AuCl4- was reduced from hydrochloric acid medium in the form of Au(0) by phenolic hydroxyl.

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Chemical modification of lignin and its adsorption to AuCl4-

DOI：10.11949/j.issn.0438-1157.20161453

摘要

Abstract

关键词

Keywords

references

Chemical modification of lignin and its adsorption to AuCl₄^-