ZnO负载活性炭材料对亚铁氰离子的去除性能研究  

Study on the removal efficiency of ZnO-loaded activated carbon for ferrocyanide ions

作　　者：王晓歌 吴冰[2] 郭子轩 刘亚芳 李斌川 孟伟粉 韩庆 Wang Xiaoge;Wu Bing;Guo Zixuan;Liu Yafang;Li Binchuan;Meng Weifen;Han Qing(School of Metallurgy,Northeastern University;Sanmenxia Polytechnic;Sanmenxia Nonferrous Metal Technology Development Center)

机构地区：[1]东北大学冶金学院 [2]三门峡职业技术学院 [3]三门峡市有色金属技术发展中心

出　　处：《黄金》2025年第4期102-107,共6页Gold

基　　金：三门峡市2022年科技攻关项目(2022002001)。

摘　　要：亚铁氰离子([Fe(CN)_(6)]^(4-))是一种稳定的污染物,长期存在于黄金生产产生的含氰废水中,阻碍了含氰废水的有效治理和达标排放。研究制备了氧化锌(ZnO)负载活性炭材料,探究其对[Fe(CN)_(6)]^(4-)的去除性能、吸附机理、吸附产物的热解再生等。结果表明:吸附剂制备的优化条件为焙烧温度550℃、焙烧时间2 h、ZnO负载量10%;该吸附剂可实现亚铁氰离子的完全吸附;吸附机理为活性炭表面的ZnO与[Fe(CN)_(6)]^(4-)反应生成Zn_(2)[Fe(CN)_(6)]。吸附产物热解过程中,Zn_(2)[Fe(CN)_(6)]热分解生成Zn、Fe、C和N_(2),未反应的ZnO活性位点重新暴露出来,从而实现吸附剂的再生;在氩气气氛、热解温度为350℃、热解时间为2 h条件下,再生吸附剂的吸附效果最佳。Ferrocyanide ions([Fe(CN)_(6)]^(4-)),a stable pollutant in cyanide-containing wastewater from gold production,hinder effective wastewater treatment and compliant discharge.This study developed zinc oxide(ZnO)-loaded activatedcarbon materials to investigate their removal efficiency,adsorption mechanisms,and pyrolytic regeneration for adsorptionproducts of[Fe(CN)_(6)]^(4-).Results show that optimal preparation conditions include a roasting temperature of 550℃,roasting time of 2 h,and ZnO loading of 10%.Complete adsorption can be achieved with the adsorbent.The adsorptionmechanism involves the reaction of ZnO on the activated carbon surface with[Fe(CN)_(6)]^(4-)to form Zn_(2)[Fe(CN)_(6)].Duringpyrolysis regeneration of adsorption products,Zn_(2)[Fe(CN)_(6)]decomposes into Zn,Fe,C,and N_(2),while unreacted ZnO active sites are re-exposed,enabling adsorbent regeneration.Regenerated adsorbents exhibit optimal performance whenthe pyrolysis temperature is 350℃and the pyrolysis duration is 2 h under argon atmosphere.

关 键 词：亚铁氰离子 氧化锌 活性炭 吸附 再生 含氰废水 

分 类 号：TD926.5[矿业工程—选矿]