摘要
实验制备了碱改性生物炭负载纳米羟基磷灰石复合材料(BC/N-HAP),并以罗丹明B(RB)为目标污染物,考察该材料负载量、吸附剂使用量、pH及共存离子对罗丹明B去除效果的影响,并对吸附机理进行了探讨。实验结果表明,纳米羟基磷灰石成功负载到生物炭表面,当负载率为100:1(W/W BC:N-HAP),复合材料使用量为50 mg,体系pH为10时,60 min内罗丹明B的去除率为87.8%。动力学研究表明,该吸附过程符合伪二级动力学方程(R^(2)>0.99);热力学研究表明,该过程是自发吸热反应,符合Langmuir单分子层吸附模型。静电作用是复合材料吸附RB染料的主要作用力。
In this paper,modified biochar was prepared by chemical activation and then nano-hydroxyapatite was loaded on it to prefabricate composite materials(BC/N-HAP).Rhodamine B(RB)solution was used as the target pollutant to investigate the adsorption of composite materials.The effects of temperature,adsorbent usage,loading amount and pH on the adsorption efficiency were investigated.At the same time,the adsorption kinetics and thermodynamics were also studied.Moreover,the adsorption mechanism was explored.The experimental results showed that the adsorption efficiency was better when the total loading of 1%(W/W N-HAP:BC),the amount of sample added 50 mg,and the pH was 10.Under the optimized conditions,the removal rate of RB was 87.8% within 60 min.Kinetic studies showed that the adsorption process accorded with pseudo-second-order kinetic equation(R^(2)>0.99).Thermodynamic results showed that the adsorption process accorded with Langmuir isotherm model better.The electrostatic interaction is the main force of adsorption of RB dye.
作者
吴鸿伟
朱大成
王登峰
陈迪
张秀华
张宝营
WU Hongwei;ZHU Dacheng;WANG Dengfeng;CHEN Di;ZHANG Xiuhua;ZHANG Baoying(Department of Chemistry,Zaozhuang University,Zaozhuang 277160,China;Zaozhuang Eco-Environment Monitoring Center,Zaozhuang 277100,China;School of Environmental Science and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,China;Shandong Yiyuan Environmental Technology Co.,Ltd.,Zaozhuang 250101,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2024年第6期85-90,共6页
Technology of Water Treatment
基金
山东省自然科学基金项目(ZR2022MB067、ZR2022QB113、ZR2020MB030)
枣庄英才集聚工程专项经费资助
枣庄市产学研联合基金(2022CXY08)
枣庄学院博士启动基金(1020720)。
