镧钙改性污泥/小麦秸秆水热炭除磷的工艺条件优化
Optimization of process conditions for phosphorus removal using lanthanum calcium modified sludge/wheat straw hydrothermal carbon
陶辰瀚 1龚为进 1蔺鸿涛 1祁超智 1黄磊 1余正洋1
作者信息
- 1. 中原工学院能源与环境学院,河南郑州 450007
- 折叠
摘要
以市政污泥为研究对象,磷酸二氢钾为目标污染物,采用碱沉淀与一步水热法制备多金属改性污泥/小麦秸秆水热炭.为得到高单位吸附量的最佳制备条件,研究La/Ca摩尔比、污泥/小麦秸秆质量比、水热温度、水热时间和固液比单因素对单位吸附量的影响,并在单因素实验基础上应用响应曲面法优化,确定了最佳制备条件的水热温度为170℃,水热时间为 8.5 h,固液比为0.02.在此条件下制得生物炭的单位吸附量为 84.19 mg/g,与预测值 82.21mg/g基本吻合.
Abstract
The research focuses on the removal of phosphorus from municipal sludge,with potassium dihydrogen phosphate as the target pollutant.Multi-metal modified sludge/wheat straw hydrothermal char is prepared using alkali precipitation and one-step hydrothermal method.To obtain the optimal preparation conditions for high unit adsorption capacity,the effects of La/Ca molar ratio,sludge/wheat straw mass ratio,hydrothermal temperature,hydrothermal time,and solid-liquid ratio on unit adsorption capacity are studied.Based on single-factor experiments,response surface methodology is applied to optimize the conditions.The optimal hydrothermal temperature is determined to be 170℃,hydrothermal time 8.5 hours,and solid-liquid ratio 0.02.Under these conditions,the unit adsorption capacity of the biochar is 84.19 mg/g,which closely matches the predicted value of 82.21 mg/g.
关键词
市政污泥/水热炭化/生物炭/响应曲面法/除磷Key words
municipal sludge/hydrothermal carbonization/biochar/response surface methodology/phosphorus removal引用本文复制引用
基金项目
2022年中原工学院基本科研业务费专项资金项目(K2022YY007)
出版年
2024
NETL
NSTL
万方数据