生物炭负载纳米零价铁材料的制备及还原降解性能

doi:10.11934/j.issn.1673-4831.2017.07.011

生态与农村环境学报 ›› 2017, Vol. 33 ›› Issue (7): 660-664.doi: 10.11934/j.issn.1673-4831.2017.07.011

生物炭负载纳米零价铁材料的制备及还原降解性能

林琳¹, 万金忠², 李群², 周艳², 吴娟³, 李川¹, 张胜田², 朱丽珺³

1. 南京林业大学生物与环境学院, 江苏南京 210037;
2. 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;
3. 南京林业大学理学院, 江苏南京 210037

收稿日期:2016-10-09 出版日期:2017-07-25 发布日期:2017-07-25
通讯作者: 万金忠,E-mail:wjz@nies.org;朱丽珺,E-mail:lxyzlj@njfu.edu.cn E-mail:wjz@nies.org;lxyzlj@njfu.edu.cn
作者简介:林琳(1993-),女,江苏南京人,硕士生,研究方向为环境化学。E-mail:874013518@qq.com
基金资助:
国家自然科学基金（41571316，41201311）；江苏省环保科研课题（2013026）

Preparation and Reductive Degradation Properties of Biochar Loaded With Nano Zero-Valent Iron

LIN Lin¹, WAN Jin-zhong², LI Qun², ZHOU Yan², WU Juan³, LI Chuan¹, ZHANG Sheng-tian², ZHU Li-jun³

1. College of Biology and Environment, Nanjing Forestry University, Nanjing 210037, China;
2. State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control/Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection of China, Nanjing 210042, China;
3. faculty of science, Nanjing Forestry University, Nanjing 210037, China

Received:2016-10-09 Online:2017-07-25 Published:2017-07-25

摘要/Abstract

摘要：

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%。

关键词: 生物炭, 纳米零价铁, γ-六六六, 吸附, 降解

Abstract:

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℃ 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.

Key words: biochar, nano zero-valent iron, γ-BHC, adsorption, degradation

中图分类号:

林琳, 万金忠, 李群, 周艳, 吴娟, 李川, 张胜田, 朱丽珺. 生物炭负载纳米零价铁材料的制备及还原降解性能[J]. 生态与农村环境学报, 2017, 33(7): 660-664.

LIN Lin, WAN Jin-zhong, LI Qun, ZHOU Yan, WU Juan, LI Chuan, ZHANG Sheng-tian, ZHU Li-jun. Preparation and Reductive Degradation Properties of Biochar Loaded With Nano Zero-Valent Iron[J]. Journal of Ecology and Rural Environment, 2017, 33(7): 660-664.

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生物炭负载纳米零价铁材料的制备及还原降解性能

Preparation and Reductive Degradation Properties of Biochar Loaded With Nano Zero-Valent Iron

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