南华大学学报（自然科学版）2025，Vol.39Issue(2)：17-24,41,9.DOI:10.19431/j.cnki.1673-0062.2025.02.003
载羟基磷灰石生物炭(Ps-BC)吸附U(Ⅵ)的行为及机理
Behavior and Mechanism of Adsorption of U(Ⅵ)by Biochar-supported Hydroxyapatite(Ps-BC)Materials
摘要
Abstract
Biochar supported hydroxyapatite(Ps-BC)was prepared by in-situ co-precipita-tion method for the deep treatment of low concentration uranyl wastewater produced in rare earth production process.Through static adsorption test,the pH value,adsorption time,adsorbent dosage,initial uranium concentration and interfering ions on Ps-BC adsorption U(Ⅵ)characteristics were explored.Scanning Electron Microscope and Energy Dispersive Spectrometer(SEM-EDS),X-ray Diffraction(XRD),Fourier Transform Infra-red Spectrometer(FTIR)and other representative means were used to characterize the products before and after adsorption.The experimental results show that the initial uranium concentration is 10.0 mg/L,when the temperature is 25℃,the pH value of the solution is 3.0,and the amount of adsorbent is 0.20 g/L,the equilibrium is reached after 60 min,and the uranium concentration is reduced to 0.04 mg/L.The theoretical maximum adsorp-tion capacity is 210 mg/g.The interference ion effect test showed that Na+and K+promo-ted the adsorption process of Ps-BC,and Ca2+inhibited the adsorption process of Ps-BC.The adsorption process is consistent with the Langmuir adsorption isothermal model,which is dominated by monolayer adsorption.The quasi-second-order kinetic model can well fit the adsorption process,which is dominated by chemical adsorption.关键词
U(Ⅵ)/生物炭/羟基磷灰石Key words
U(Ⅵ)/biochar/hydroxyapatite分类
资源环境引用本文复制引用
刘强,谢水波,刘迎九,董智涛..载羟基磷灰石生物炭(Ps-BC)吸附U(Ⅵ)的行为及机理[J].南华大学学报（自然科学版）,2025,39(2):17-24,41,9.基金项目
湖南省自然科学基金项目(2021JJ30579) （2021JJ30579）
湖南省研究生科研创新项目(S202310555300) （S202310555300）
