多金属改性生物炭磷吸附性能和动力学研究  

Research on the Phosphorus Adsorption Performance and Kinetics of Multi-metal Modified Biochar

作　　者：蔺鸿涛 龚为进[1] 陶辰瀚 祁超智 黄磊 余正洋 LIN Hongtao;GONG Weijin;TAO Chenhan;QI Chaozhi;HUANG Lei;YU Zhengyang(School of Smarts Energy and Environment,Zhongyuan University of Technology,Zhengzhou 450007,China)

机构地区：[1]中原工学院智慧能源与环境学院,河南郑州450007

出　　处：《山东化工》2025年第3期23-27,共5页Shandong Chemical Industry

摘　　要：以市政污泥和玉米秸秆为原料,采用冷冻干燥一步水热法制备镧、镁改性生物炭(LM-YMBC)。考察了水热温度、镧镁金属物质的量比、水热时间等因素对LM-YMBC磷吸附性能的影响。动力学研究表明,拟二级动力学模型和Langmuir等温线模型的数据拟合较好,表明生物炭磷吸附过程主要为化学吸附和单层吸附。SEM分析显示LM-YMBC拥有发达的孔隙结构和很大的比表面积,EDS能谱图表明磷被成功吸附到LM-YMBC表面,FTIR分析表明生物炭分子结构中含有大量的羟基和羧基,XRD结果显示镧、镁分别以La(OH)_(3)和Mg(OH)_(2)的形式负载到生物炭表面,并在吸附过程中和污水中的磷反应分别生成LaPO_(4)和Mg_(2)(PO_(4))OH。Lanthanum and magnesium-modified biochar(LM-YMBC)was prepared from municipal sludge and corn stover by one-step freeze-drying hydrothermal method.The impact of hydrothermal temperature,lanthanum to magnesium metal ratio and hydrothermal time on the phosphorus adsorption performance of LM-YMBC were examined.The kinetic study demonstrated that the data from the proposed two-level kinetic model and Langmuir isotherm model exhibited a high degree of correlation,indicating that the phosphorus adsorption process of the biochar was predominantly chemisorption and monolayer adsorption.The SEM analysis revealed that the LM-YMBC exhibited a well-developed pore structure and a remarkably large specific surface area,and the EDS spectra confirmed that the phosphorus was successfully adsorbed onto the surface of the LM-YMBC.The FT The FTIR analysis of the biochar revealed the presence of a considerable number of hydroxyl and carboxyl groups in its molecular structure.The XRD results demonstrated that lanthanum and magnesium were loaded onto the biochar surface in the form of La(OH)_(3) and Mg(OH)_(2).During the adsorption process,these elements reacted with phosphorus in the wastewater to form LaPO_(4) and Mg_(2)(PO_(4))OH.

关 键 词：生物炭 市政污泥 玉米秸秆 磷吸附 动力学 

分 类 号：TQ424[化学工程] X703.1[环境科学与工程—环境工程]