河北师范大学学报—

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刊名：河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
主办：河北师范大学
ISSN： 1000-5854
CN： 13-1061/N
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椰壳活性炭对水中Au(Ⅲ)的吸附性能

周夫涛¹

张含卓¹

张丽²

1. 中国矿业大学材料工程学院, 江苏徐州 221116;
2. 中国矿业大学化工学院, 江苏徐州 221116
DOI：

Adsorption Performance of Coconut Shell-based Activated Carbons to Au(Ⅲ) in Aqueous Solution

ZHOU Futao¹, ZHANG Hanzhuo¹, ZHANG Li²

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摘要/Abstract

摘要：

采用颗粒状椰壳活性炭对HAuCl₄水溶液中Au(Ⅲ)进行吸附实验,研究了Au(Ⅲ)初始浓度、pH值、吸附时间和温度对其吸附性能的影响.结果表明,活性炭对Au(Ⅲ)的吸附平衡时间约为90 min；当pH=2.5时其吸附率可达96.3%,且随着温度的升高而下降.吸附等温线与Langmuir吸附方程符合较好.热力学计算表明,椰壳活性炭对Au(Ⅲ)的吸附是放热过程且具有自发性.

Abstract：

Granular coconut shell-based activated carbons(CSAC) were employed for adsorption tests of Au(Ⅲ) in HAuCl₄ aqueous solution.Effects of initial concentration of HAuCl₄ solution,pH value,adsorption time and temperature on the adsorption performance of CSAC were investigated.The results indicated that the adsorption equilibrium time of CSAC to Au(Ⅲ) was about 90 min.The adsorption rate was up to 96.3 % when pH value was modulated to 2.5,and it decreased as the temperature rose.The adsorption isotherms were consistent with Langmuir adsorption equation.Thermodynamic calculation indicated that the adsorption of CSAC to Au(Ⅲ) was an exothermic and spontaneous process.

关键词

关键词： 椰壳活性炭 ; 吸附 ; 金

Key words： coconut shell-based activated carbons ; adsorption ; gold