芦苇生物炭的制备及氨氮吸附特性研究
Preparation of Reed Biochar and Study on Its Ammonia Nitrogen Adsorption Characteristics
夏苑 1齐娅荣 1钟艳霞1
作者信息
- 1. 宁夏大学生态环境学院,宁夏银川 750021
- 折叠
摘要
为解决废弃水生植物的资源化利用问题,以及使水生植物制备的生物炭在吸附水体中的氨氮(NH4+-N)时得到更好的利用,采用湿地芦苇为原材料烧制芦苇生物炭,探查芦苇生物炭的物理特征,在不同的试验条件下,研究芦苇生物炭对水体中NH4+-N的吸附特性.结果表明:生物炭材料表面细长,粗糙不平,附着许多小颗粒,具有多孔结构.吸附动力学研究表明,6 h为芦苇生物炭吸附NH4+-N的最佳时间参数,吸附过程更符合准二级拟合方程.等温吸附线研究表明,25℃能更好地描述芦苇生物炭对NH4+-N的等温吸附过程,芦苇生物炭对NH4+-N的等温吸附更符合Freundlich方程.
Abstract
In order to solve the problem of resource utilization of waste aquatic plants,the biochar prepared by aquatic plants can be better uti-lized when absorbing NH4+-N in water,this paper used wetland reed as raw material to burn reed biochar,and explored the physical character-istics of reed biochar,under different experimental conditions,the adsorption characteristics of reed biochar to NH4+-N were studied.The results showed that the surface of reed biochar was elongated,rough and uneven,many small particles were attached,and it had a porous structure.The adsorption kinetics study showed that 6 hours was the optimal time parameter for reed biochar to adsorb NH4+-N,and the adsorption process was more in line with the quasi second order fitting equation.The isotherm study showed that 25℃could better describe the isotherm adsorption process of NH4+-N by reed biochar,and the isotherm adsorption behavior of reed biochar on NH4+-N was more in line with the Freundlich e-quation.
关键词
芦苇生物炭/氨氮/吸附特性/动力学/吸附等温线Key words
Reed biochar/Ammonia nitrogen/Adsorption characteristics/Kinetics/Adsorption isotherm引用本文复制引用
基金项目
宁夏回族自治区重点研发计划(2021BEG02010)
国家自然科学基金(42277466)
国家自然科学基金(41561106)
出版年
2024
国家科技期刊平台
NSTL
万方数据