低碳化学与化工2025，Vol.50Issue(4)：80-89,10.DOI:10.12434/j.issn.2097-2547.20240376
不同铁基生物炭的制备及其对Sb(Ⅲ)吸附特性研究
Study on preparation of different iron-based biochar and its adsorption property for Sb(Ⅲ)
摘要
Abstract
The increasingly serious issue of antimony(Sb)pollution makes it crucial to search for an efficient and feasible method to treat Sb-containing wastewater.The Spartina alterniflora and Sycamore bark were used as raw materials to screen for the preferred biochar(FSC300 and FMC400),and EA,N2 adsorption/desorption,SEM,FT-IR and XRD techniques were used to characterize the surface physical and chemical properties of different biochar.The Sb(Ⅲ)adsorption kinetics and isothermal adsorption characteristics of preferred biochar and pristine biochar prepared at corresponding pyrolysis temperature were also studied.The results show that FSC300 has a high surface oxygen content and strong polarity,while FMC400 has a high carbon content and strong aromaticity.Compared to the pristine biochar,the specific surface areas of FSC300 and FMC400 increase by 1.35 and 1.10 times,respectively.FSC300 and FMC400 successfully load Fe3O4 and FeOOH.When the pH value of Sb-containing wastewater is 5 and the biochar dosage is 2.5 g/L,the Sb(Ⅲ)adsorption capacities of FSC300 and FMC400 increase to 20.81 mg/g and 22.06 mg/g,which are 1.63 and 1.78 times higher than the initial biochar respectively.The adsorption process of Sb(Ⅲ)fits the Langmuir model and quasi-second-order kinetic model,mainly as monolayer chemical adsorption.The adsorption mechanisms include physical adsorption,surface complexation and ion exchange.关键词
锑污染/铁基生物炭/Sb吸附/吸附机理Key words
antimony pollution/iron-based biochar/Sb adsorption/adsorption mechanism分类
化学工程引用本文复制引用
王琴,黄兆琴,吉栋梁,张宇峰..不同铁基生物炭的制备及其对Sb(Ⅲ)吸附特性研究[J].低碳化学与化工,2025,50(4):80-89,10.基金项目
江苏省科技厅产学研合作项目(BY20230861,BY20230942,BY20230850). （BY20230861,BY20230942,BY20230850）
