磷石膏中磷的存在形态及转化释放特征研究  

Study on the Existence Form and Transformation and Release Characteristics of Phosphorus in Phosphogypsum

作　　者：张昱 管青军 周富佳 张佳妮 卜勇杰 周双 余伟健 Zhang Yu;Guan Qingjun;Zhou Fujia;Zhang Jiani;Bu Yongjie;Zhou Shuang;Yu Weijian(Hubei Three Gorges Laboratory,Yichang,Hubei 443007;School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan,Hu’nan 411201)

机构地区：[1]湖北三峡实验室,湖北宜昌443007 [2]湖南科技大学资源环境与安全工程学院,湖南湘潭411201

出　　处：《非金属矿》2025年第1期6-9,13,共5页Non-Metallic Mines

基　　金：国家自然科学基金区域创新发展联合基金(U23A20602);湖南省自然科学基金优秀青年基金(2023JJ20025);湖南省科技创新计划资助(2024RC3214);湖北三峡试验室开放/创新基金(SK232003)。

摘　　要：本试验研究了贵州磷石膏中磷形态及浓度,探讨了磷释放的动力学特性,并分析磷释放过程中环境因子的影响及动态淋滤过程中磷浓度的变化。结果表明,总磷浓度为3.58 mg/g,磷石膏中磷的释放潜力在0.10~2.21 mg/g范围。前8 h为磷石膏中磷的主要释放阶段,最大释放速率(V_(max))为3.66 mg/(g·h)。强酸或强碱及盐度和温度升高均能促进磷石膏中磷的释放。在动态淋滤试验中,磷的浸出量随着淋滤时间的延长逐渐减少,初期下降速度较快且浓度较高,中后期的释放速度减缓且浓度较低。This study investigates the phosphorus forms and concentrations in Guizhou phosphogypsum,explores the kinetic characteristics of phosphorus release,and analyzes the impact of environmental factors on phosphorus release and the changes in phosphorus concentration during the dynamic leaching process.The results show that the total phosphorus concentration is 3.58 mg/g.The phosphorus release potential in the phosphogypsum ranges from 0.10 to 2.21 mg/g.The primary release phase of phosphorus from the phosphogypsum occurs within the first 8 h,the maximum release rate(V_(max))is 3.66 mg/(g·h).The release of phosphorus can be promoted by strong acidity or alkalinity,and salinity and temperature increase.In the dynamic leaching experiment,the phosphorus leaching amount gradually decreases with leaching time increasing,decline rate is faster and the concentration was higher in the early stage,while the release rate was slower and the concentration was lower in the middle and later stages.

关 键 词：磷石膏 磷形态 磷释放 淋滤 

分 类 号：TQ177.3[化学工程—硅酸盐工业]