花生壳生物炭的制备、表征及其对邻苯二甲酸二甲酯的吸附特性  

Preparation,characterization of peanut shell biochar and its adsorption properties on dimethyl phthalate

作　　者：赵明涛 张婧雯 李冬冬 方昭 ZHAO Ming-tao;ZHANG Jing-wen;LI Dong-dong;FANG Zhao(Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem,Ministry of Education,Ningxia University,Yinchuan 750021,China;Breeding Base of Key Laboratory for Preventing Land Degradation and Ecological Restoration,Ningxia University,Yinchuan 750021,China;College of Resources and Environment,Ningxia University,Yinchuan 750021,China;Henan Electric Power Survey&Design Institute,Zhengzhou 450000,China;Institute of Soil and Water Conservation,Northwest A&F University,Yangling 712100,China)

机构地区：[1]宁夏大学西北退化生态系统恢复与重建教育部重点实验室,宁夏银川750021 [2]宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地,宁夏银川750021 [3]宁夏大学资源环境学院,宁夏银川750021 [4]中国电建集团河南省电力勘测设计院有限公司,河南郑州450000 [5]西北农林科技大学水土保持研究所,陕西杨陵712100

出　　处：《应用化工》2021年第9期2415-2417,2423,共4页Applied Chemical Industry

基　　金：国家自然科学基金项目(41761102)。

摘　　要：研究以典型农业废弃物花生壳为原材料,采用限氧升温法在200,450℃下分别热解2,6 h制备4种生物炭,基于对4种生物炭元素组成和表面性质进行分析的基础上,比较不同制备条件下生物炭对邻苯二甲酸二甲酯(DMP)的吸附性能差异。结果表明,4种花生壳生物炭的元素含量大小为C>O>H>N,随着热解温度的升高,生物炭中碳元素含量显著增高,氢、氧、氮3种元素的含量明显下降,生物炭的芳香性增强且极性减弱,而热解时间对元素含量的影响较小。花生壳生物炭的比表面积、微孔面积和微孔孔容均随热解温度的升高而增加。4种花生壳生物炭对DMP的吸附均符合Freundlich方程,花生壳生物炭制备温度越高,其吸附能力越强,吸附过程呈现明显的非线性特征。对实现花生壳资源化利用和水体有机污染物治理方面具有良好的借鉴意义。Four kinds of biochars were prepared by pyrolysis of peanut hulls from agricultural wastes for 200,450℃for 2 h and 6 h respectively.Built on the analysis of the composition and surface properties of four kinds of biochars,the adsorption of dimethyl phthalate on biochars under different preparation conditions was compared.The results showed that the elemental content of the four-peanut shell biochars was C>O>H>N.With the increase of pyrolysis temperature,the carbon content in the biochars increased significantly,while the contents of hydrogen,oxygen and nitrogen decreased dramatically.The aromaticity and polarity of the biochars increased,while the influence of pyrolysis time on the elemental content was low.The specific surface area,micropore area and micropore volume of peanut shell biochar built up over the increase of pyrolysis temperature.The adsorption of DMP by the four kinds of peanut shell biochar conformed to the Freundlich equation.The higher the preparation temperature of peanut shell biochar,the stronger its adsorption capacity.The adsorption process of high temperature biochar showed obvious non-linear characteristics.It has a good reference significance for realizing resource litilization of peanut shell and treating organic pollutants in water body.

关 键 词：花生壳 生物炭 吸附 邻苯二甲酸二甲酯 

分 类 号：TQ424.3[化学工程] TQ265.22