摘要
试验以建筑废料粉煤灰砖块为研究对象,通过静态吸附试验考察其对磷的吸附能力;并构建以粉煤灰砖块为填料的多级串联复合垂直流人工湿地反应器探索对磷的去除效果。填料的吸附等温特性利用Langmuir,Freundlich和Temkin等温模型进行分析,其中Langmuir方程最适合描述吸附过程,计算的饱和吸附量达44.62mg/g。动态湿地反应器的原水采用西安建筑科技大学校园生活污水,其中磷酸盐平均为2.43 mg/L,在水力负荷为0.012、0.017及0.023 m3/(m2.d)条件下系统对磷的去除率均可达到99%以上。粉煤灰砖块的吸附沉淀作用是湿地系统除磷的主要途径。结果表明,粉煤灰砖块作为湿地填料对磷具有较强的去除能力,同时又可减少固体废弃物的数量,是一种以废治废的新技术。
The adsorption characteristics of fly ash blocks powder on phosphate were evaluated,and a multi-stage vertical subsurface flow constructed wetland filled with fly ash blocks also has been investigated.Langmuir,Freundlich and Temkin isotherms were used to analyze the equilibrium data.The Langmuir isotherm is best fitted the experimental data significantly,yielding maximum adsorption capacity of 44.62 mg/g.The system was fed with the campus sewage of Xi＇an University of architecture and technology,and average concentration of phosphate was 2.43 mg/L.When the hydraulic loading was 0.012,0.017 and 0.023 m 3 /（m 2.d）,the phosphorus removal rates were all more than 99%.P immobilization was governed by adsorption and precipitation of fly ash blocks.The reuse of fly ash blocks as medium of constructed wetland system provided a win-win approach for both the fly ash blocks disposal and wastewater control.
出处
《水处理技术》
CAS
CSCD
北大核心
2013年第8期30-33,共4页
Technology of Water Treatment
基金
国家水体污染控制与治理科技重大专项(2009ZX07212-002-004-003)
关键词
人工湿地
粉煤灰砖块
磷
吸附等温式
吸附动力学
constructed wetland
fly ash blocks
phosphate
adsorption isotherm
adsorption kinetics
