氨基磺酸改性花生壳生物炭对微囊藻毒素-LR的吸附性能研究  

Adsorption Performance of Sulfamic Acid-modified Peanut Shell Biochar on Microcystin-LR

作　　者：曾益宣 王华生[1] 宋芳琪 吴文昱 Zeng Yixuan;Wang Huasheng;Song Fangqi;Wu Wenyu(Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学,江西赣州341000

出　　处：《广东化工》2024年第24期43-46,72,共5页Guangdong Chemical Industry

基　　金：江西省大学生创新创业训练计划项目(S202110407052)。

摘　　要：利用氨基磺酸改性热解法制备改性花生壳生物炭,利用SEM、BET和XPS对生物炭进行表征,并开展对水体中微囊藻毒素-LR的吸附实验。结果表明,改性后的生物炭表面具有微米级孔隙和气泡状团聚物,比表面积和孔体积增大,新增了磺酸基团,含氧官能团增加;吸附过程符合二级动力学,吸附等温线符合Freundlich模型;过高的pH值和大分子量的可溶性有机物会明显抑制吸附;吸附机理涉及孔填充作用、静电相互作用、氢键作用和π-π作用。The modified peanut shell biochar was prepared by sulfamic acid-modified pyrolysis,characterised by SEM,BET and XPS,and adsorption experiments on microcystin-LR in water were carried out.The results showed that the modified biochar surface had micron-sized pores and bubble-like agglomerates,the specific surface area and pore volume increased,new sulfonic acid groups were added,and oxygen-containing functional groups increased;the adsorption process conformed to the second-order kinetics,and the adsorption isotherm conformed to the Freundlich model;excessive pH and large molecular weight dissolved organic matter significantly inhibited the adsorption;and the adsorption mechanism involved pore-filling effect,electrostatic interaction,hydrogen bonding andπ-πinteraction.

关 键 词：生物炭 氨基磺酸 MC-LR 花生壳 吸附 

分 类 号：TQ424[化学工程] X524[环境科学与工程—环境工程]