南京工业大学学报（自然科学版）2023，Vol.45Issue(6)：647-653,7.DOI:10.3969/j.issn.1671-7627.2023.06.007
改性多孔硅酸镁纳米材料对废水中Ni2+的吸附性能
Adsorption properties of modified porous magnesium silicate nanomaterials for Ni2+in wastewater
鲍静 1冯拥军 2潘勇 1蒋军成1
作者信息
- 1. 南京工业大学安全科学与工程学院,江苏 南京 211800||江苏省危险化学品本质安全与控制技术重点实验室,江苏 南京 211800
- 2. 北京化工大学化工资源有效利用国家重点实验室,北京 100029
- 折叠
摘要
Abstract
A series of hierarchical porous magnesium silicate nanomaterials modified by sodium dodecyl sulfonate(SDS)were applied to adsorb the heavy metal ions Ni2+in industrial wastewater.The concentration of Ni2+in the solution before and after adsorption was determined by inductively coupled plasma emission spectrometer(ICP-AES),and the experimental data were fitted with the kinetic and Langmuir adsorption model.Based on the fitting results of the characterization data and experimental data,the adsorption behavior of the modified materials,the structure-activity relationship between the adsorption efficiency of the modified materials and the specific surface area,pore structure of the adsorbed materials were discussed.Results showed that the equilibrium adsorption capacity of 5-FMS(doped with mass fraction 5％SDS)with large pore size and specific surface area was the largest,which could reach 231.62 mg/g.The adsorption behavior of Ni2+by all materials conformed to the pseudo-second-order kinetic model,which indicated that chemisorptions played a dominant role in the adsorption process.At the same time,the adsorption of Ni2+by all materials conformed to the Langmuir adsorption model well,indicating that the adsorption of Ni2+by all materials was single molecular layer uniform adsorption,and the theoretical adsorption capacity of 5-FMS was the largest,which was 280.40 mg/g.The removal of Ni2+with this series of materials was mainly due to electrostatic adsorption,the surface metal ions(Mg2+)and acid groups exchange with Ni2+in solution.关键词
硅酸镁/多级孔/改性剂/Ni2+吸附/废水处理/吸附剂Key words
magnesium silicate/hierarchical porous/modifier/Ni2+adsorption/wastewater treatment/adsorbent分类
资源环境引用本文复制引用
鲍静,冯拥军,潘勇,蒋军成..改性多孔硅酸镁纳米材料对废水中Ni2+的吸附性能[J].南京工业大学学报（自然科学版）,2023,45(6):647-653,7.
