Strongly acidic lead contaminated soil solidification/stabilization using metakaolin-modified fly ash phosphoric-based geopolymer
文献类型：期刊论文
| 作者 | Pu, Shaoyun1,2; Xu, Bomin1; Cai, Guojun3; Duan, Wei4; Liu, Yang5; Lang, Lei6; Shen, Zewei1; Yao, Huiran1 |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2024-09-15 |
| 卷号 | 496页码:17 |
| 关键词 | Acidic contaminated soil Solidification/stabilization MAPG binder Leaching properties Mechanical properties Microscopic mechanism |
| ISSN号 | 1385-8947 |
| DOI | 10.1016/j.cej.2024.154336 |
| 英文摘要 | The existing binders are difficult to be compatible with the acidic environment of acidic heavy metal contaminated soil, it is hard to repair acidic heavy metal contaminated soil. In this study, a modified acid phosphorusbased geopolymer (MAPG) binder suitable for the solidification/stabilization (S/S) treatment of acidic heavy metal Pb2+ contaminated soil was fabricated using aluminum dihydrogen phosphate (ADP) as activator, fly ash and metakaolin (MK) as raw materials. The influences of liquid-solid ratio (L/S), MK content, ADP concentration, curing age and leaching environment on the compressive strength, toxic leaching, resistivity, pH and EC of MAPG stabilized acidic Pb2+ contaminated soil were studied. Meantime, the X-ray diffraction, scanning electron microscopy, fourier transform infrared spectroscopy, and mercury intrusion (MIP) experiments were used to study the chemical properties and microscopic performance of MAPG treated acidic Pb2+ contaminated soil. The results showed that the MAPG binder prepared from MK had an excellent S/S effect on the acidic Pb2+ contaminated soil, and the MAPG binders had good compatibility with the acidic environment. The compressive strength of each group of MAPG stabilized soil could meet the strength standard (>350 kPa) for solid waste landfill and Pb2+ leaching concentration is < 5 mg/L for toxicity identification criteria after 7 days of curing. With an increase in curing age, the strength of stabilized acidic contaminated soil decreased slightly, but the strength still met the requirements of landfill strength standard after 28 days of curing. In three different leaching environments, the Pb2+ leaching decreased with an increase in curing age. Microscopic analysis showed that the main crystalline compounds in stabilized contaminated soil were potassium feldspar, Berlinite and lead phosphate compounds, and their contents were related to L/S, MK content, ADP concentration, and curing time. Potassium feldspar, berlinite, and lead phosphate compounds could not only fill pores, but also had physisorption, encapsulation and chemical precipitation effects on Pb2+. The study could provide an economical, environmental friendly and efficient binder for the remediation of acidic Pb(2+ )contaminated soil, but the further investigation into the long-term effectiveness of the MAPG binder or its applicability to other types of contaminated soil is also needed. |
| 资助项目 | Science Foundation of Zhejiang Province of China[LQ23E080005] ; National Science Fund for Distinguished Young Scholars of China[42225206] ; Natural Science Foundation of China[42307219] ; Natural Science Foundation of China[52108332] ; Guizhou Provincial Science and Technology Support Plan Project[[2023] 136] ; China Postdoctoral Science Foundation[2024M752869] ; Shanxi Scholarship Council of China[2023-042] ; Central Government Guides Local Science and Technology Development Fund Projects of China[YDZJSX20231A022] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001288241300001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42196]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Cai, Guojun; Duan, Wei |
| 作者单位 | 1.Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Zhejiang, Peoples R China 2.Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312000, Zhejiang Provin, Peoples R China 3.Anhui Jianzhu Univ, Sch Civil Engn, Hefei 230601, Anhui Province, Peoples R China 4.Taiyuan Univ Technol, Coll Civil Engn, Taiyuan 030024, Shanxi, Peoples R China 5.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong 999077, Peoples R China 6.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Pu, Shaoyun,Xu, Bomin,Cai, Guojun,et al. Strongly acidic lead contaminated soil solidification/stabilization using metakaolin-modified fly ash phosphoric-based geopolymer[J]. CHEMICAL ENGINEERING JOURNAL,2024,496:17. |
| APA | Pu, Shaoyun.,Xu, Bomin.,Cai, Guojun.,Duan, Wei.,Liu, Yang.,...&Yao, Huiran.(2024).Strongly acidic lead contaminated soil solidification/stabilization using metakaolin-modified fly ash phosphoric-based geopolymer.CHEMICAL ENGINEERING JOURNAL,496,17. |
| MLA | Pu, Shaoyun,et al."Strongly acidic lead contaminated soil solidification/stabilization using metakaolin-modified fly ash phosphoric-based geopolymer".CHEMICAL ENGINEERING JOURNAL 496(2024):17. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。