摘要
针对黄原胶吸附剂亲水性强,难以从水体中分离的问题,添加丁基黄药协同处理模拟选矿废水中的Cu(Ⅱ),通过条件试验确定适宜的工艺参数,并通过Zeta电位、红外光谱和XPS分析吸附机理。当黄原胶投加量为50 mg/L、溶液pH值为6、搅拌时间为30 min、初始Cu(Ⅱ)浓度为60 mg/L时,Cu(Ⅱ)的去除率达87.44%。在上述条件基础上,添加40 mg/L丁基黄药协同黄原胶去除Cu(Ⅱ),去除率达99.86%,提高了12.42个百分点。黄原胶对废水中Cu(Ⅱ)的吸附机制包括带负电的黄原胶与带正电的金属离子之间的静电作用,以及黄原胶羟基和羧基中氧的未成键电子与Cu(Ⅱ)的空轨道的配位络合。而丁基黄药中的S可为Cu(Ⅱ)的空轨道提供电子,进一步强化了吸附效果,使得Cu(Ⅱ)去除率显著提升。研究结果为重金属离子的高效去除提供了新的思路。
Aimin at the problems that xanthan gun adsorbent is hydrophilic and difficult to separate from water,butyl xanthate was added for coprocessing Cu(Ⅱ)in simulated wastewater.The suitable processing parameters were determined by condition experiments,and adsorption mechanism was analyzed through the Zeta potential,FTIR and XPS.The Cu(Ⅱ)removal rate reached 87.44%with the dosage of xanthan gum of 50 mg/L,the pH value of solution of 6,the stirring time of 30 min and the initial concentration of Cu(Ⅱ)of 60 mg/L.On the basis of the above conditions,adding 40 mg/L butyl xanthan combined with xanthan gum to remove Cu(Ⅱ),the removal rate reached 99.86%,increased by 12.42 percentage points.The adsorption mechanism of Cu(Ⅱ)in wastewater by xanthan gum includes the electrostatic interaction between the negatively charged xanthan gum and the positively charged metal ions,and the coordination complexation between the unbonded electrons of the oxygen in the hydroxyl and carboxyl groups of xanthan gum and the vacant orbital of Cu(Ⅱ).The S in butyl xanthate can provide electrons for the vacant orbital of Cu(Ⅱ),which further enhances the adsorption effect and significantly increases the removal rate of Cu(Ⅱ).The results provide a new idea for the efficient removal of heavy metal ions.
作者
张郭阳
杨志超
滕青
韩英棋
张素红
刘生玉
ZHANG Guoyang;YANG Zhichao;TENG Qing;HAN Yingqi;ZHANG Suhong;LIU Shengyu(School of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《金属矿山》
CAS
北大核心
2023年第3期259-265,共7页
Metal Mine
基金
山西省基础研究计划青年科学研究项目(编号:20210302124061)。
关键词
黄原胶
丁基黄药
Cu(Ⅱ)的去除
协同效应
吸附试验
作用机理
xanthan gum
butyl xanthate
removal of Cu(Ⅱ)
synergistic effect
adsorption tests
reaction mechanism
