文献类型：期刊文献

英文题名：Investigation on the behavior of fly ash phosphate-based geopolymer stabilized acidic lead contaminated soil

作者：Pu, Shaoyun Yao, Huiran Wu, Zhonghu Cai, Guojun Duan, Wei Wang, Anhui Wu, Jun Li, Yonghui Xu, Bomin Shen, Zewei

第一作者：Pu, Shaoyun

通信作者：Wu, ZH[1];Cai, GJ[2]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312000, Zhejiang, Peoples R China;[3]Guizhou Inst Technol, Sch Civil Engn, Guiyang 550001, Peoples R China;[4]Guizhou Univ, Coll Civil Engn, Guiyang 550025, Peoples R China;[5]Anhui Jianzhu Univ, Sch Civil Engn, Hefei 230601, Anhui, Peoples R China;[6]Taiyuan Univ Technol, Coll Civil Engn, Taiyuan 030024, Shanxi, Peoples R China;[7]China Construct Ind & Energy Engn Grp Co Ltd, Nanjing 210023, Peoples R China;[8]China Three Gorges Univ, Coll Civil Engn & Architecture, Yichang 443002, Peoples R China;[9]Zhejiang Jinggong Steel Bldg Grp Co Ltd, Shaoxing 312000, Peoples R China

第一机构：Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Zhejiang, Peoples R China

通信机构：corresponding author), Guizhou Univ, Coll Civil Engn, Guiyang 550025, Peoples R China;corresponding author), Anhui Jianzhu Univ, Sch Civil Engn, Hefei 230601, Anhui, Peoples R China.

年份：2024

卷号：12

期号：6

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：;EI(收录号：20244717392208);Scopus(收录号：2-s2.0-85209245127);WOS:【SCI-EXPANDED(收录号:WOS:001361735600001)】；

基金：The authors acknowledge financial support from the National Science Fund for Distinguished Young Scholars of China (No. 42225206) , the Natural Science Foundation of China (No. 42307219, 52108332, 42472349) , the Natural Science Foundation of Zhejiang Province of China (No. LQ23E080005) , the Guizhou Provincial Science and Technology Support Plan Project (No.Qiankehe Support [2023] 136) , Guizhou Province science and technology plan project (No. Qiankehe platform KXJZ [2024] 020) , and the Zhejiang Province postdoctoral research project (No. ZJ2023140) , the Research Project Supported by Shanxi Scholarship Council of China (No. 2023-042) , and the Central Government Guides Local Science and Technology Development Fund Projects of China (No. YDZJSX20231A022) .

语种：英文

外文关键词：Solidification/stabilization; Phosphate-based geopolymer binder; Pb2+ leaching; Acidic Pb2+ polluted soil

摘要：The main binder on the market are cement-based materials and alkali-activated materials, which is incompatible with the acidic Pb2+ polluted soil. The fly ash phosphate-based geopolymer (APG) binder is acidic and has good performance in acidic environment and has superior S/S effect on Pb2+ polluted soil, but its applicability to acid Pb2+ polluted soil and optimal components has not been investigated. in this article, the APG binder was used to treat acid Pb2+ polluted soil, and the binder components were optimized based on different indexes. The impacted of the ADP content, liquid-solid ratio (L/S), curing time, and extract environment on the mechanical strength, EC, pH, and toxic leaching of APG treated acidic Pb2+ polluted soil were analyzed, and related mechanism was studied. Results show that the APG binder effect of S/S on acidic Pb2+ was excellent in different environments, and the APG treated acidic Pb2+ polluted soil has a good mechanical strength (> 350 kPa), the mechanical strength was impacted by the L/S and ADP concentration, when the APG binder was composed of 30 % ADP content and the 0.35 L/S, the APG treated acidic Pb2+ polluted soil yielded a maximum machanical strength of 1.93 MPa. The Pb2+ leaching was related to the extract environments, the Pb2+ leaching was minimum under deionized water and sulfuric-nitric acid environments (< 0.1 mg/L). Also, the Pb2+ was immobilized due to lead phosphate compound formation. Overall, the APG binder has good compatibility with acidic environment and great potential in treating acidic heavy metal contaminated soils, but further investigation on the durability of the APG binder is also needed.