铁铜改性生物炭活化过硫酸盐去除水体四环素研究

Iron-copper Modified Biochar Adsorption and Activated Persulfate Removal of Tetracycline from Water

中文关键词: 生物沥滤  铁铜改性生物炭  PMS  四环素  水体修复

英文关键词: bioleaching  iron-copper modified biochar  PMS  tetracycline  water remediation

中文摘要:

      本研究通过生物沥滤结合物理浸渍将铁、铜负载于生物炭，并经二次热解制备铁-铜双金属改性生物炭(FeCuBC)，探究其协同过一硫酸盐(PMS)降解四环素(TC)的性能。结果表明，FeCuBC对TC的吸附容量(221.65 mg·g-1)较改性前显著提升，对50 mg·L-1的TC去除率良好，该过程以化学吸附为主。加入PMS后，TC的去除率进一步提升，FeCuBC可有效活化PMS产生活性自由基，实现对水体中四环素的高效去除。

英文摘要:

      In this study, iron and copper were loaded on biochar by bioleaching combined with physical impregnation, and iron-copper bimetallic modified biochar (FeCuBC) was prepared by secondary pyrolysis. The performance of FeCuBC in synergizing with peroxymonosulfate (PMS) to degrade tetracycline (TC) was investigated. The results showed that the adsorption capacity of FeCuBC for TC (221.65 mg·g-1) was significantly improved compared with that before modification, and the removal rate of 50 mg·L-1 TC was good, and the process was dominated by chemical adsorption. After adding PMS, the removal rate of TC was further improved. FeCuBC could effectively activate PMS to generate active free radicals, and achieve efficient removal of tetracycline in water.