摘要
为了减少NO_(3)^(-)N污染对水环境和人体健康的危害,寻求经济有效的控制水体中NO_(3)^(-)N污染的技术至关重要。本研究利用湿地植物芦苇为原材料,在不同温度下烧制制备生物碳。同时采用FeCl_(3)对生物碳进行不同方法的改性提高其对水中NO3-N的吸附性能。结果表明,碳化温度600℃,烧制时间2h,碱性FeCl_(3)溶液浸泡24h的最佳条件下形成的生物碳(BC600)对NO_(3)^(-)N的吸附能力最强,达到1.97mg-N/L。SEM进行表面形态分析可得,BC600孔隙中加载了大量的氧化铁,可有效去除水中的NO_(3)^(-)N。本研究可为农业废秸秆的综合利用和水中硝酸盐的脱除提供了理论依据。
In order to reduce the damage of NO_(3)^(-)N pollution to water environment and human health,and to seek economical and effective technology to control the concentration of NO_(3)^(-)N in water,wetland plant phragmites communis was used to prepare biochar at different temperatures.Biochar was modified by FeCl_(3) with different methods.The results show that the best preparation conditions are carbonization temperature 600℃(BC600)for 2 h and soaking in FeCl_(3) solution(alkaline)for 24 h,which had the highest adsorption capacity of 1.97 mg-N/L.SEM images show that large amount of iron oxides were loaded in the pores of Fe-BC600 and can be used for removing NO_(3)^(-)N.This study can provide a theoretical basis for the comprehensive utilization of agricultural waste straw and the removal of nitrate in water.
作者
李徽
崔玉波
匡珮菁
Li Hui;Cui Yubo;Kuang Peijing(College of Environment and Bioresources,Dalian Minzu University,Liaoning,116600)
出处
《当代化工研究》
CAS
2024年第3期173-175,共3页
Modern Chemical Research
基金
大连民族大学创新创业训练计划项目“玉米生物碳的制备及其对水中氮污染修复的研究”(项目编号:202212026136)。
关键词
硝酸盐
改性生物碳
吸附
nitrate
modified biochar
adsorption
