【作者】 张凯； 路建； 李英；

【Author】 Kai Zhang;Jian Lu;Ying Li;Key Laboratory for Colloid and Interface Chemistry of State Education Ministry,Shandong University;

【机构】 山东大学化学与化工学院胶体与界面教育部重点实验室；

【摘要】 随着工业的不断发展,重金属对于水体的污染日益严重,由于其危害大且不可生物降解,亟需发展有效的治理措施。本文以十三烷醇聚醚-4羧酸钠（AEC）为主剂形成水基泡沫,研究在多种重金属离子(Pb²⁺/Zn²⁺/Cd²⁺)共存的情况下泡沫分离法去除各种重金属离子的效率,并探究了水基泡沫的性质、表面活性剂的浓度、与重金属离子的配比、pH等多种因素对去除效率的影响。结果表明,在很大的浓度及pH范围内,水基泡沫对水中的Pb²⁺/Zn²⁺/Cd²⁺的去除率均能够达到99%以上。通过机制分析及验证,重金属离子与AEC主要是通过静电相互作用紧密结合,并通过AEC的两亲性在气液界面吸附,进而将重金属离子带离体相,从而达到去除重金属污染的效果。我们还探究了以水杨酸为主的螯合剂与重金属及表面活性剂的协同作用,增强彼此之间的相互作用,确保更佳去除效果。采用该方法处理电池厂废水,结果表明,废水中富集的Pb²⁺/Zn²⁺的去除率均可达到95%以上。更多还原

【Abstract】 Heavy metal pollution in water has been attached more and more attention with the disadvantages of unbiodegradable and highly enriched in the food chain,with the rapid development of industries.So the development of efficient pollution control measures is urgent.In this study,we investigated the anionic surfactant sodium trideceth-4 carboxylate（AEC） as a blowing agent to remove heavy metals by foam fractionation in the conditions of heavy metal ions(Pb²⁺/Zn²⁺/Cd²⁺) coexistence.And several factors on the removal efficiency were discussed,such as foam properties,the ratio of heavy metals and surfactant,the concentration of surfactant,pH and so on.The result shows that the removal rate of heavy metal ions could reach more than99%under the optimum conditions.The heavy metal ions could be bonded with AEC molecules depend on the electrostatic interaction,and taken away from bulk with the amphiphilic molecules by foaming.The synergistic effect of chelating agent,such as salicylic acid,with heavy metals and surfactants to enhance the removal efficiency of heavy metals were also examined,it is found that the chelating agent has significant contributions on the removal efficiency.More of a bright,the foam fractionation to the treatment of wastewater from battery was successful applied,the remove rate of Pb²⁺ and Zn²⁺ from battery wastewater could reach more than 95%.更多还原