改性生物炭吸附水体中三硝基菲的实验研究  

An Experimental Study on Adsorption of Trinitrophenanthrene in Water by Modified Biochar

作　　者：刘箬溪 赵林茜 徐佳楠 郭钰滢 杨晓霞 王娟 Liu Ruoxi;Zhao Linxi;Xu Jianan;Guo Yuying;Yang Xiaoxia;Wang Juan(College of Biological and Chemical Engineering,Jiaxing University,Jiaxing 314033;Zhejiang Jiaxing Ecological Environment Monitoring Centre,Jiaxing 314000)

机构地区：[1]嘉兴大学生物与化学工程学院,嘉兴314033 [2]浙江省嘉兴生态环境监测中心,嘉兴314000

出　　处：《上海环境科学》2024年第6期258-262,共5页Shanghai Environmental Sciences

基　　金：嘉兴大学大学生科研训练计划(SRT)项目(编号:8517231198)资助。

摘　　要：选择稻草、高粱为原材料,在温度为300、500、700℃的条件下制备稻草炭、高粱炭,用FeCl3改性得改性稻草炭、改性高粱炭,研究其对三硝基菲的吸附能力。结果表明:700℃下,改性稻草炭对三硝基菲的吸附能力最强;若投加0.02g改性稻草炭或改性高粱炭入10mL浓度为20μg/L的三硝基菲溶液中,就可去除>90%的三硝基菲;700℃下制备的4种生物炭对三硝基菲的吸附约经1h达到平衡,吸附动力学过程符合准二级反应动力学模型,整个吸附过程化学吸附占主导过程;Langmuir等温吸附方程对本实验拟合程度更好,改性稻草生物炭、改性高粱生物炭对三硝基菲的最大吸附量分别为90.09、77.52μg/g。Rice straw and sorghum were chosen as raw materials to prepare charcoals under temperatures of 300℃,500℃and 700℃,respectively,and then modified by ferric chloride individually to obtain modified biochar whilst their trinitrophenanthrene adsorption capacities were studied.Results showed that the rice straw biochar made under the temperature of 700℃and then modified had the strongest adsorption capability for trinitrophenanthrene.For 10 mL of trinitrophenanthrene solution in a concentration of 20μg/L,over 90%of trinitrophenanthrene herein could be removed if 0.02 g of the modified charcoal made either from rice straw or sorghum was added.The adsorption of trinitrophenanthrene by those four kinds of biochar prepared under 700℃could achieve an equilibrium in about an hour,and their adsorption kinetic processes were in line with a quasi-second-order reaction kinetic model,and the whole adsorption process was dominated by chemisorption.The Langmuir isothermal adsorption curve could be betterfitted,and the maximum capacities of adsorbing trinitrophenanthrene by the rice straw and sorghum made modified biochar would reach 90.09μg/g and 77.52μg/g,respectively.

关 键 词：改性生物炭 三硝基菲 吸附 

分 类 号：S51[农业科学—作物学]