铈对满江红和槐叶萍降解苯胺类废水的效果分析

Effect of cerium application on aniline wastewater degradation by Azolla filiculoidesLamk and Salvinia natans

选取满江红和槐叶萍两种浮水植物为研究对象,通过在同等条件下的室内静态模拟试验,采用高效液相色谱法测定,分析比较了它们在稀土铈的施用下对废水中苯胺类化合物的降解效果。研究表明:满江红和槐叶萍对受试水体中的对硝基苯胺、2,4-二硝基苯胺和3-硝基苯胺均有降解效果。微量的稀土元素铈能促进植物对三类物质的降解,其中浓度为5 mg·L-1的稀土溶液促进槐叶萍效果最佳,降解率分别达到89.60%,89.86%和89.69%,但高浓度时出现抑制。满江红总体去除效果要优于槐叶萍。

Azolla filiculoides Lamk and Salvinia natans as the floating aquatic plants were selected as the experimen- tal materials, through the static water control experiment, their purification effect with application of rare earth cerium on removing paranitroanilinum,2, 4-dinitroaniline and 3-nitroaniline were determined by HPLC. The results showed that the two plants were both effective on removal of the three aniline compounds in the water. The trace rare earth el- ement cerium can promote the degradation of three aniline compounds by Azolla filiculoides Lamk and Salvinia ha- tans, among which application with 5 mg· L-1 cerium solution was most effective for Azolla filiculoides Lamk on three aniline compounds, showing the degradation rate of 89. 60%, 89. 86% and 89. 69%, respectively. However, the inhibitive effect appeared under high concentration of cerium. In general, the removal effect of Azolla filiculoides Lamk on three aniline compounds was superior to Salvinia natans.