混凝土渣对PO_(4)^(3-)-P的吸附研究  

Study of PO_(4)^(3-)-P Adsorption by Concrete Slag

作　　者：刘骅 王若凡 田甜 杨光[1] 田开栋 孙鹤洲 程博 Liu Hua;Wang Ruofan;Tian Tian;Yang Guang;Tian Kaidong;Sun Hezhou;Cheng Bo(School of Environmental and Municipal Engineering,Lanzhou Jiao Tong University,Lanzhou,Gansu 730070,China)

机构地区：[1]兰州交通大学环境与市政工程学院,甘肃兰州730070

出　　处：《绿色科技》2023年第8期167-171,177,共6页Journal of Green Science and Technology

摘　　要：以混凝土渣材料为研究对象,探究了混凝土渣作为固磷吸附剂对PO_(4)^(3-)-P的吸附特征,分析了不同环境下混凝土渣对PO_(4)^(3-)-P的吸附情况。通过动力学实验及等温吸附实验分析,混凝土渣吸附平衡时间为12 h,较符合准二级动力学方程及Langmuir方程,粒径越小,吸附效果越好,理论饱和吸附量达21210 mg/kg,温度、扰动增大均提升混凝土渣吸附量。扰动频率小于150 r/min时,水力扰动增大,使混凝土渣吸附量显著上升,扰动频率大于150 r/min时,水力扰动对吸附量影响不显著。pH值增大混凝土渣吸附量减小,pH值为9.0时吸附量呈最小值。综上所述,建筑废弃物混凝土渣应用于去除水体中PO_(4)^(3-)-P有着很好的效果和应用前景。The adsorption characteristics of concrete slag as a solid phosphorus adsorbent on PO_(4)^(3-)-P were investigated,and the adsorption of PO_(4)^(3-)-P by concrete slag under different environments was analyzed.Through kinetic experiments and isothermal adsorption experiments,concrete slag adsorption equilibrium time is 12h,which is more in line with the quasi-secondary kinetic equation and Langmuir equation.The smaller the particle size,the better the adsorption effect.The theoretical saturation adsorption capacity is 21210 mg/kg.Temperature and perturbation increase all enhance the adsorption of concrete slag.The adsorption amount of concrete slag was significantly increased when the disturbance frequency was less than 150 r/min,and the effect of hydraulic disturbance on the adsorption amount was not significant when the disturbance frequency was more than 150 r/min.The adsorption amount of concrete slag decreased when the pH increased,and the adsorption amount was the minimum when the pH was 9.0.In conclusion,the application of construction waste concrete slag for PO_(4)^(3-)-P removal has good effect and application prospect.

关 键 词：吸附材料 混凝土渣 建筑废弃物 吸附作用 解吸作用 动力学 扰动 温度 

分 类 号：X52[环境科学与工程—环境工程]