广东石油化工学院学报2025，Vol.35Issue(1)：45-48,4.
碱改性稻秸炭的理化特性及吸附性能
Physicochemical Properties and Adsorption Performance of Alkali Modified Rice Straw Biochar
摘要
Abstract
Through chemical analysis,instrumental characterization,pyrolysis experiments,and adsorption experiments,the physicochemical properties and adsorption performance of four types of alkali(sodium hydroxide,potassium hydroxide,magnesium hydroxide,and calcium hydroxide)modified rice straw biochar were compared and studied.The results showed that the four alkaline modifications significantly increased the alkalinity(pH value)of rice straw biochar,and the modifications with sodium hydroxide and potassium hydroxide increased significantly.Alkaline modification significantly reduced the C and N content of rice straw biochar,increased the O and H content and the number of oxygen-containing functional groups,increased the H/C,O/C,and(O+N)/C atomic ratios,and enhanced polarity.The modification with sodium hydroxide,potassium hydroxide,and calcium hydroxide significantly increased the adsorption capacity of rice straw biochar for methylene blue.The four alkaline modifications significantly increased the adsorption capacity of rice straw biochar for tetracycline.Among them,calcium hydroxide modified rice straw biochar showed the largest increase in adsorption capacity for methylene blue and tetracycline.Calcium hydroxide is the best modifier among the four alkalis,and calcium hydroxide modified rice straw biochar has great potential for application in the adsorption and removal of organic pollutants.关键词
改性稻秸炭/碱/理化特性/吸附性能Key words
modified rice straw biochar/alkali/physical and chemical properties/adsorption performance分类
环境科学引用本文复制引用
彭娜,周海军,王开峰..碱改性稻秸炭的理化特性及吸附性能[J].广东石油化工学院学报,2025,35(1):45-48,4.基金项目
广东石油化工学院人才引进项目(2020rc012,2020rc019) （2020rc012,2020rc019）
