摘要
以新鲜含水的豆腐渣为碳源,所含水冷冻后形成的冰为模板,利用微波快速制备具有多种官能团的分级孔生物碳应用于吸附水中重金属。相比于使用管式炉600℃温度下碳化所得的豆腐渣炭(CN-600),微波法18 min制备的生物炭(CN-18)含有更多的杂元素(O,N)、丰富的官能团和分级孔结构。CN-18的多种官能团和分级结构提供了独特的活性位点和易迁移的离子通道,其协同效应能够高效去除重金属离子Pb(Ⅱ)。在pH=5时,CN-18对Pb(Ⅱ)的最高吸附能为130.5 mg/g,是CN-600的1.5倍(86.5 mg/g)。该实验利用生物废弃物制备生物炭材料,为处理重金属污染提供了一种绿色、环保、规模化的可行方法。
In this paper,we propose a method of using biological waste for the adsorption of heavy metal in water.Fresh bean curd residue containing water is used as the carbon source.The moisture content in bean curd residue is used as the template after freezing.The microwave-prepared biocarbon material with multiple functional groups performed superior adsorption effect on heavy metal in water.Compared with CN-600 obtained by cracking at 600℃,the biochar(CN-18)prepared by the microwave method in 18 minutes contains more heteroatom elements(O,N)and rich functional groups,showing microstructure of graded pores.The multiple functional groups and hierarchical structure in CN-18 provide unique active sites and easily mobile ion channels,and its synergistic effect can efficiently remove heavy metal ions Pb(Ⅱ).At pH=5,the highest adsorption capacity of CN-18 for Pb(Ⅱ)is 130.5 mg·g^(-1),which is 1.5 times(86.5 mg·g^(-1))of CN-600 obtained by high-temperature carbonization.This work provides a green,environmentally friendly and scalable method for preparing biochar-based environmental functional materials from biological waste to deal with heavy metal pollution.The experimental process involves the typical steps of environmental functional materials research,and the experimental content is comprehensive,simple and novel.It can cultivate students’innovative thinking and comprehensive practical ability.
作者
侯建华
窦倩
杨木易
胡继娟
吴晓歌
姚宇
王小治
HOU Jianhua;DOU Qian;YANG Muyi;HU Jijuan;WU Xiaoge;YAO Yu;WANG Xiaozhi(School of Environmental Science and Engineering,Yangzhou University,Yangzhou 225000,Jiangsu,China;Guangling College,Yangzhou University,Yangzhou 225009,Jiangsu,China;Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization,Nanjing 210095,China;School of Animal Science and Technology,Yangzhou University,Yangzhou 225000,Jiangsu,China)
出处
《实验室研究与探索》
CAS
北大核心
2021年第12期40-45,共6页
Research and Exploration In Laboratory
基金
国家自然科学基金(51602281)
江苏省研究生实践创新计划(SJCX20_1378)
扬州大学教育改革项目(YZUJX2018-42C)
扬州大学“课程思政”教学示范课程(M016X009)
扬州大学本科专业品牌化建设与提升工程
扬州大学“高端人才支持计划”
江苏高校‘青蓝工程’项目资助
关键词
豆腐渣
冰模板
多孔生物炭
吸附重金属
功能材料
微波法
bean residue
ice template
porous biochar
adsorption of heavy metal
microwave method
