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洛美沙星和镁离子共存体系下载锆生物炭的吸附特性
Adsorption of Lomefloxacin and Magnesium Ions by Zirconium-loaded Biochar in the Binary System
【摘要】 为了解决水中抗生素和金属离子污染问题,以玉米苞叶为原料制备载锆生物炭,考察其对洛美沙星及镁离子在一元和二元体系中的吸附特性。结果表明:载锆生物炭对两者均具有良好的吸附能力。一元体系中,载锆生物炭对洛美沙星的去除效果在初始pH为3时达到最优,而对镁离子的吸附能力随pH的增加而增加;二元系统中,随着pH的增大,镁离子与洛美沙星之间的吸附关系由竞争抑制逐渐转变成桥接、络合促进。
【Abstract】 In order to remove metal ions and antibiotics from aqueous environment,the adsorption performances of zirconium-loaded biochar,which was from corn bract,on lomefloxacin and Mg2+,were investigated in the single and binary systems. The results show that Zr-biochar has good adsorption capacities for both lomefloxacin and Mg2+. In the single system,the lomefloxacin adsorption capacity reaches a maximum when the initial pH is 3. The adsorption for Mg2+increases with the increase of pH. In the binary system,as pH increasing,the adsorption relationship between Mg2+and lomefloxacin is changing from competitive inhibition to bridging and complexation promotion.
【Key words】 binary system; metal ion; antibiotic; biochar; adsorption;
- 【文献出处】 科学技术与工程 ,Science Technology and Engineering , 编辑部邮箱 ,2019年18期
- 【分类号】X703
- 【被引频次】2
- 【下载频次】118