摘要
该实验是从研究水生植物资源化的科研工作中开发出来的一个环境生物工程综合实验。实验研究了酸改性水生植物大薸生物质炭的制备及利用它吸附富营养化水体中的铵态氮。综合比较制备条件及吸附条件和吸附效果后发现,450℃的炭化温度,1 h炭化时长制备的酸改性大薸生物质炭,在室温下,pH值为7的条件下,反应平衡时长72 h,对富营养化水体中的铵态氮的吸附量较高。实验还对该吸附材料性质进行了研究,发现酸改性大薸生物质炭的表面形态较为粗糙,形成多孔的稳定结构;表面存在相对丰富的含氧官能团;相比未改性的大薸生物质炭,也具有较高的比表面积。该实验可以采用分组和演示等不同的教学方式,从生物质制备和活化、铵态氮测定、各种材料表征、数据处理和分析等方面对学生进行训练,是一个较为综合性的实验。
This experiment is developed from research on the resource utilization of aquatic plant species within the field of environmental bioengineering.The study investigates the preparation of acid-modified biochar from Pistia stratiotes and its use for the adsorption of ammonium nitrogen in eutrophic water.A comprehensive comparison of the preparation conditions,adsorption conditions and adsorption effects indicated that the acid-modified biochar from P.stratiotes prepared at a carbonization temperature of 450℃for 1 hour exhibited a higher adsorption capacity for ammonium nitrogen in eutrophic water when equilibrated for 72 hours at room temperature and under neutral pH conditions.The experiment also examined the properties of this adsorption material,revealing that the surface morphology of the acid-modified biochar from P.stratiotes was relatively rough,forming a porous and stable structure.The surface contained a relatively rich amount of oxygen-containing functional groups,and compared to the unmodified giant reed biomass carbon,it had a higher specific surface area.This experiment can utilize different teaching methods such as grouping and demonstrations,providing training for students in various aspects including biomass preparation and activation,ammonium nitrogen determination,characterization of different materials,as well as data processing and analysis.It is a relatively comprehensive experiment.
作者
周淑贤
陈一力
傅明辉
张宏梅
赵宏霞
廖问陶
Zhou Shuxian;Chen Yili;Fu Minghui;Zhang Hongmei;Zhao Hongxia;Liao Wentao(Guangdong University of Technology,Guangzhou 510006,China)
出处
《广东化工》
2025年第16期144-147,共4页
Guangdong Chemical Industry
基金
国家自然科学基金项目(21177029)。
关键词
环境工程
综合实验
生物质炭
酸改性
吸附
铵态氮
environmental engineering
comprehensive experiment
biochar
acid modification
adsorption
ammonium nitrogen
