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

作　　者：夏苑 齐娅荣 钟艳霞 XIA Yuan;QI Ya-rong;ZHONG Yan-xia(School of Ecology and Environment,Ningxia University,Yinchuan,Ningxia 750021)

机构地区：[1]宁夏大学生态环境学院,宁夏银川750021

出　　处：《安徽农业科学》2024年第12期75-79,共5页Journal of Anhui Agricultural Sciences

基　　金：宁夏重点研发计划项目(2021BEG02010);国家自然科学基金项目(42277466,41561106)。

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(NH_(4)^(+)-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NH_(4)^(+)-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NH_(4)^(+)-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NH_(4)^(+)-N的等温吸附过程,芦苇生物炭对NH_(4)^(+)-N的等温吸附更符合Freundlich方程。In order to solve the problem of resource utilization of waste aquatic plants,the biochar prepared by aquatic plants can be better utilized when absorbing NH_(4)^(+)-N in water,this paper used wetland reed as raw material to burn reed biochar,and explored the physical characteristics of reed biochar,under different experimental conditions,the adsorption characteristics of reed biochar to NH_(4)^(+)-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 NH_(4)^(+)-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 NH_(4)^(+)-N by reed biochar,and the isotherm adsorption behavior of reed biochar on NH_(4)^(+)-N was more in line with the Freundlich equation.

关 键 词：芦苇生物炭 氨氮 吸附特性 动力学 吸附等温线 

分 类 号：X173[环境科学与工程—环境科学]