基于热力学分析方法研究废铅膏含铅组分的浸出行为  

Studying the leaching properties of the main components of spent lead paste based on thermodynamic analysis

作　　者：张伟[1,2] 杨家宽[2] 于鲁冀[1] 曾科[1] 喻文昊[2] 高双全 ZHANG Wei;YANG Jiakuan;YU Luji;ZENG Ke;YU Wenhao;GAO Shuangquan(School of Water Conservancy&Environment,Zhengzhou University,Zhengzhou 450001,China;School of Environmental Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]郑州大学水利与环境学院,河南郑州450001 [2]华中科技大学环境科学与工程学院,湖北武汉430074

出　　处：《浙江大学学报（理学版）》2018年第4期484-487,496,共5页Journal of Zhejiang University（Science Edition）

基　　金：国家科技支撑计划项目(201300001);郑州大学青年教师启动基金项目(32210517);河南省高等学校重点科研项目(18B610008)

摘　　要：基于热力学分析方法,借助Medusa分析软件,分析了废铅膏主要含铅组分在枸橼酸钠-柠檬酸绿色回收浸出体系中的浸出行为,并与实际制备所得产物的物相表征结果进行了对比分析.结果表明:pH值为2.3~4.5,电位为0~1.2V时,浸出的稳定物相为Pb(Hcit);pH值为4.5~7.5,电位为0~1.2V时,浸出体系的稳定物相为Pb_2(Cit)_2^(2-),其与游离的Pb^(2+)可进一步络合.产物的物相表征结果与热力学结果基本吻合,表明以Medusa为媒介的热力学分析方法可用于废铅膏主要含铅组分的浸出过程和转化规律研究.The basic thermodynamic analysis using Medusa software was applied in this study to analyze the leaching behavior of spent lead paste containing lead components in sodium citrate and citric acid leaching system.The results were compared with the phase characterization results of obtained lead containing products by X-ray diffraction(XRD)technique.It showed that the Pb(Hcit)was predominant with pH value between 2.3 and 4.5,and the potential between 0 and 1.2 V.The predominant phase was mainly Pb 2(Cit)2-2 when pH value was between 4.5 and 7.5,and the potential was between 0 and 1.2 V,which would react with free Pb 2+.The results are consistent with the phase characterization results.Thus,the thermodynamic analysis can be applied to investigate the main lead containing components leaching in citric acid leaching system.

关 键 词：热力学 废铅膏 浸出行为 

分 类 号：X75[环境科学与工程—环境工程]