球磨-碱活化改性椰壳生物炭对恩诺沙星吸附性能  

Modification of coconut shell biochar by ball milling with an alkali for enrofloxacin adsorption

作　　者：校导 郑丽丽[1] 郑晓燕[1] 杨旸 艾斌凌 盛占武[1] XIAO Dao;ZHENG Lili;ZHENG Xiaoyan;YANG Yang;AI Binling;SHENG Zhanwu(Institute of Tropical Bioscience and Biotechnology,Chinese Academy of Tropical Agricultural Sciences,Haikou 571101,China)

机构地区：[1]中国热带农业科学院热带生物技术研究所,海口571101

出　　处：《复合材料学报》2024年第8期4324-4333,共10页Acta Materiae Compositae Sinica

基　　金：海南省重点研发计划(ZDYF2023XDNY049,ZDYF2019187);海南省自然科学基金(319QN267);中央级公益性科研院所基本科研业务费创新团队专项(17CXTD-05)。

摘　　要：为了高效吸附水中的恩诺沙星(EFA),本文通过球磨法和KOH活化对椰壳进行改性制备椰壳生物炭(BM-KOH-BC),并在吸附EFA方面进行深入研究。通过扫描电子显微镜、傅里叶变换红外光谱和X射线衍射等方法对BM-KOH-BC进行表征,结果揭示了KOH活化和球磨改性显著提高了BM-KOH-BC的孔隙结构和比表面积。在优化条件下(初始EFA浓度为80 mg·L^(-1)时,在pH值为7,温度为25℃,吸附剂剂量为0.14 g·mg·L^(-1),搅拌速度为200 r/min、接触时间为35 h的条件下,BM-KOH-BC表现出良好的吸附性能,去除率达77.4%,最大吸附容量为481.1 mg·g^(-1)。吸附过程符合二级动力学模型和Freundlich等温线模型。此外,BM-KOH-BC在5次吸附-解吸循环后仍保持高效的EFA去除率。这一低成本、高效吸附和可循环利用的特性使BM-KOH-BC在处理水体中的EFA方面展现出潜在的应用前景。In order to efficiently adsorb enrofloxacin(EFA)in water,coconut shell biochar(BM-KOH-BC)was prepared by modifying coconut shell through ball milling and KOH activation,and in-depth research was conducted on the adsorption of EFA.BM-KOH-BC was characterized by scanning electron microscopy,Fourier transform infrared spectroscopy,and X-ray diffraction.The results revealed that KOH activation and ball milling modification significantly improved the pore structure and specific surface area of BM-KOH-BC.Under optimized conditions(Initial EFA concentration is 80 mg·L^(-1),pH value is 7,temperature is 25℃,adsorbent dosage is 0.14 g·mg·L^(-1),stirring speed is 200 r/min,contact time under the conditions of 35 h),BM-KOH-BC showed good adsorption performance,with a removal rate of 77.4%and a maximum adsorption capacity of 481.1 mg·g^(-1).The adsorption process is consistent with the second-order kinetic model and Freundlich isotherm model.In addition,BM-KOH-BC still maintains efficient EFA removal rate after 5 adsorption-desorption cycles.This low-cost,efficient adsorption and recyclability feature makes BM-KOH-BC show potential application prospects in treating EFA in water bodies.

关 键 词：球磨 生物炭 椰壳 恩诺沙星 吸附 

分 类 号：TB332[一般工业技术—材料科学与工程]