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硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (1): 151-168.DOI: 10.16552/j.cnki.issn1001-1625.2024.0862

• 资源综合利用 • 上一篇    下一篇

粉煤灰放置与利用过程中有害元素迁移规律及环境风险评估研究进展

郝龙龙1, 秦身钧1,2, 庞薇2, 李神勇2, 吕大炜3, 郑雪3, 侯佳佳2, 门长全2   

  1. 1.河北工程大学地球科学与工程学院,邯郸 056038;
    2.河北工程大学材料科学与工程学院,邯郸 056038;
    3.山东科技大学地球科学与工程学院,青岛 266590
  • 收稿日期:2024-07-23 修订日期:2024-09-25 出版日期:2025-01-15 发布日期:2025-01-23
  • 通信作者: 秦身钧,博士,教授。E-mail:qsjhbhd@163.com
  • 作者简介:郝龙龙(1998—),男,硕士研究生。主要从事煤基固废资源化利用方向的研究。E-mail:hl1632379132@163.com
  • 基金资助:
    国家自然科学基金(42172191);河北省自然科学基金(D2024402011,B2024402035);青岛市科技惠民示范专项(24-1-8-cspz-24-nsh)

Research Progress of Migration Law of Harmful Elements and Environmental Risk Assessment in Process of Coal Fly Ash Placement and Utilization

HAO Longlong1, QIN Shenjun1,2, PANG Wei2, LI Shenyong2, LYU Dawei3, ZHENG Xue3, HOU Jiajia2, MEN Changquan2   

  1. 1. School of Earth Science and Engineering, Hebei University of Engineering, Handan 056038, China;
    2. School of Materials Science and Engineering, Hebei University of Engineering, Handan 056038, China;
    3. School of Earth Science and Technology, Shandong University of Engineering, Qingdao 266590, China
  • Received:2024-07-23 Revised:2024-09-25 Published:2025-01-15 Online:2025-01-23

摘要: 粉煤灰作为大宗铝硅酸盐固体废物,在放置和资源化利用过程中,有害元素可能会迁移并对环境造成风险。本文综述了粉煤灰中有害元素的赋存状态,粉煤灰在放置、利用过程中有害元素的迁移及相关影响因素和环境风险评估方法。粉煤灰中的大部分有害元素主要以残渣态或铁锰氧化物态存在。在放置过程中,粉煤灰中有害元素的迁移受到元素地球化学性质、粒径和pH值等因素的影响,体现出不同的特征。在资源化利用过程中有害元素亦会表现出不同的迁移规律,如粉煤灰改良土壤过程中,有害元素性质不同时,它们会向表层土壤或深层土壤迁移,但随着时间的延长,均有向表层土壤迁移的倾向;在粉煤灰基功能材料制备中,金属有害元素主要迁移进入产品,而非金属有害元素主要迁移进入废液;在粉煤灰有价元素提取过程中,有害元素会迁移到废液、废渣和产品中,但具体细节目前尚缺少研究。最后对现有粉煤灰中有害元素环境风险相关标准与规范、环境风险评估方法进行了总结,并分析了存在的问题和提出了研究展望。

关键词: 粉煤灰, 放置, 利用, 有害元素, 迁移, 环境风险

Abstract: Coal fly ash, as a bulk aluminosilicate solid waste, poses environmental risks due to the migration of harmful elements during its placement and resource utilization. This paper reviews the occurrence state of harmful elements in coal fly ash, the migration of these elements during placement and utilization, influencing factors, and methods for environmental risk assessment. The majority of harmful elements in coal fly ash primarily exist in residual or iron-manganese oxide states. During the placement process, the migration of harmful elements in coal fly ash is influenced by factors such as the geochemical properties of elements, particle size, and pH value, exhibiting different characteristics. In the process of resource utilization, harmful elements also show different migration rules. During the process of soil improvement using coal fly ash, the migration of harmful elements to the surface or deep soil layers varies due to their different properties, but there is a tendency for migration to the surface soil over time. In the preparation of functional materials based on coal fly ash, metal harmful elements mainly migrate into the product, while non-metal harmful elements primarily migrate into the waste liquid. In the extraction process of valuable elements from coal fly ash, harmful elements migrate into waste liquid, waste residue, and products, but specific details are currently lacking. Finally, this paper summarizes existing standards and regulations related to the environmental risk of harmful elements in coal fly ash, as well as environmental risk assessment methods, analyzes existing problems, and proposes research prospects.

Key words: coal fly ash, placement, utilization, harmful element, migration, environmental risk

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