首页|污酸石膏渣的环境稳定性与金属释放特性研究

污酸石膏渣的环境稳定性与金属释放特性研究

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为探究火法炼铜过程产生的污酸石膏渣的环境风险,通过解析污酸石膏渣性质,采用模拟堆存、静态侵蚀、半动态侵蚀的方法研究污酸石膏渣的长期稳定性与重金属释放特性.结果表明,污酸石膏渣中As、Cd浸出浓度超标,分别为1 488.66、22.98 mg/L.其中,As的酸可提取态达87.55％,Cd的有效态超90％,存在严重环境风险.模拟堆存结果表明,污酸石膏渣为严重生态风险等级,应做好防淋失、防扬尘等措施.在静态与半动态侵蚀下,污酸石膏渣表面附着的As、Cd在化学反应、扩散等作用下大量浸出,使浓度均处于较高水平.其中,模拟填埋场环境各元素浸出浓度远高于其他模拟环境,需重点关注.
Reaearch on environmental stability and heavy metals release characteristics of gypsum sludge from waste acid treatment
In order to explore the environmental risk of waste acid gypsum sludge produced by the thermal copper refining process,the long-term stability and heavy metal release characteristics of waste acid gypsum sludge were investigated using the methods of simulated stockpiling,static erosion,and semi-dynamic erosion.The findings indicate that the waste acid gypsum sludge has a leaching concentration of As and Cd that is higher than the standard(1 488.66 and 22.98 mg/L,respectively),with As reaching an acid-extractable state of 87.55％and Cd effective state exceeding 90％,which poses a serious environmental risk.The results of the simulated stockpiling demonstrate that shower loss and dust should be prevented because waste acid gypsum sludge poses a serious ecological risk level.As and Cd adhered to the surface of waste acid gypsum sludge are leached out in significant amounts by chemical reaction and diffusion during static and semi-dynamic erosion,resulting in concentrations that are all quite high.Among them,the leaching concentration of each element in the landfill simulation environment is significantly larger than that in other simulation environments,which requires special attention.

waste acid gypsum sludgeenvironmental risksimulated stackingstatic leachingsemi-dynamic leachingheavy metal release behavior

王云燕、何紫彤、柯勇、罗永健、唐巾尧、孙竹梅、闵小波

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中南大学冶金与环境学院

国家重金属污染防治工程技术研究中心

中北大学环境与安全工程学院

污酸石膏渣 环境风险 模拟堆存 静态浸出 半动态浸出 重金属释放特性

国家重点研发计划国家自然科学基金创新研究群体项目湖南省自然科学基金重大项目湖南省科技创新项目

2020YFC1909204521210042021JC00012021RC3013

2024

10.12153/j.issn.1674-991X.20230769

环境工程技术学报
中国环境科学研究院

环境工程技术学报

CSTPCD北大核心
影响因子：1
ISSN：1674-991X
年,卷(期)：2024.14(3)
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