首页> 中文期刊> 《生态与农村环境学报》 >生物炭负载纳米零价铁材料的制备及还原降解性能

生物炭负载纳米零价铁材料的制备及还原降解性能

         

摘要

Three kinds of biochars (BCs) were prepared from peanut shell, rice straw and corn stalk, and further into three kinds of composites of the corresponding biochar-loaded with nano zero-valent iron (BC/nZVI), separately, of which physic-chemical properties and structures were characterized with BET and SEM, respectively.Moreover, effects of the BC/nZVI reductively degrading γ-benzene hexachloride (BHC), a typical organochlorine pesticide (OCP) in aqueous solutions were determined.Results show that peanut shell, rice straw and corn stalk pyrolyzed at 300 °C turned out the highest amounts of BCs, which were high in adsorption capacity.The prepared BC/nZVI appeared to be in spherical particle, and the one prepared out of peanut shell was the highest in dispersivity.In aqueous phase experiments, BC/nZVI was much higher than BC or nZVI in effect of removing γ-BHC.Among three kinds of composites, the peanut shell based BC/nZVI was the highest in γ-BHC removal rate, reaching up to 87.53% in aqueous solutions for six hours and had the total pollutant degradation rate reach up to 82.33% in the reaction system.%选取花生壳、稻草秸秆和玉米秸秆为原料制备不同种类生物炭,合成不同生物炭负载纳米零价铁复合材料(BC/nZVI).采用比表面积分析、扫描电镜等多种表征方法获得不同BC/nZVI的物理化学和结构性质,测试BC/nZVI对水溶液中典型有机氯农药γ-六六六的还原降解效果.结果表明,花生壳、稻草秸秆和玉米秸秆均在300 ℃制备条件下有较高的产率和较好的吸附效果;制备的BC/nZVI颗粒呈球状结构,以花生壳BC/nZVI分散性为最好;在水相实验中,添加BC/nZVI对γ-六六六的去除效果优于单独添加生物炭或者纳米零价铁的效果;3种生物炭基材料中,花生壳BC/nZVI对水相γ-六六六6 h的去除率为87.53%,反应体系中污染物总降解率达82.33%.

著录项

  • 来源
    《生态与农村环境学报》 |2017年第7期|660-664|共5页
  • 作者单位

    南京林业大学生物与环境学院,江苏 南京 210037;

    环境保护部南京环境科学研究所/国家环境保护土壤环境管理与污染控制重点实验室,江苏 南京 210042;

    环境保护部南京环境科学研究所/国家环境保护土壤环境管理与污染控制重点实验室,江苏 南京 210042;

    环境保护部南京环境科学研究所/国家环境保护土壤环境管理与污染控制重点实验室,江苏 南京 210042;

    南京林业大学理学院,江苏 南京 210037;

    南京林业大学生物与环境学院,江苏 南京 210037;

    环境保护部南京环境科学研究所/国家环境保护土壤环境管理与污染控制重点实验室,江苏 南京 210042;

    南京林业大学理学院,江苏 南京 210037;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 土壤污染及其防治;
  • 关键词

    生物炭; 纳米零价铁; γ-六六六; 吸附; 降解;

相似文献

  • 中文文献
  • 外文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号