改性柚皮对水体中盐酸环丙沙星的动态吸附研究-《郑州大学学报(工学版)》

文章信息/Info

Title:: Fixed Bed Column Study for Ciprofloxacin Hydrochloride Removal from Solution Using Modified Grapefruit Peel

Author(s):: Wei-hua zou; FuYanZhen Liu Penglei; liu xiao; courtyard; Zhengzhou university institute of chemical industry and energy, henan zhengzhou, 450001

Keywords:: Modification of pomelo peel; Ciprofloxacin hydrochloride (CIP); Dynamic adsorption; Thomas model; BDST model; Mass transfer model

摘要:: 以改性柚皮为吸附剂对水体中的盐酸环丙沙星（CIP）进行动态吸附性能。考察了吸附柱高度、CIP初始浓度和流速对穿透曲线的影响，分别用Thomas模型、The bed-service time (BDST)模型和传质模型对动态吸附实验数据拟合。结果表明，随着柱高的增加、初始浓度以及流速的减小，穿透时间延长；吸附量实验值q_e与Thomas模型预测值q₀较为接近，且R²＞0.9500，表明Thomas模型能够描述该动态吸附过程；BDST模型可以准确预测穿透时间和饱和时间，穿透时间的预测值和实验值间的最大误差为1.32%；传质模型预测的理论穿透曲线和实际穿透曲线的趋势一致。

Abstract:: In this study, the adsorption capacity of modified grapefruit peel to ciprofloxacin hydrochloride (CIP) was investigated in the fixed-bed column technique. The effects of initial CIP ciprofloxacin, flow rate, and column height on the breakthrough characteristics of the adsorption system were studied. With the increase of adsorption column height or decrease of initial concentration and flow rate, the breakthrough time were increased. The Thomas model was applied to the experimental data to determine the characteristic parameters of the column that were useful for process design.The R²of Thomas model was more than 0.9500 and the experimental values q_exp was similar to theoretical values q_e. It was indicated that Thomas model is suitable for describe the dynamic adsorption. The bed depth service time( BDST) model was applied to predict the breakthrough time and saturated time under different conditions. The results showed that BDST model could predict breakthrough time accurately and maximum error were less than 1.32%. The theoretical breakthrough curve according to mass transfer model was accordance with experimental breakthrough curve in the column process.