文献类型：期刊文献

英文题名：One-pot synthesis of high-efficiency hydroxyapatite-hydrochar composites derived from phytoremediation biomass and bone meal: Heavy metal stabilization, adsorption performance and mechanism

作者：Chen, Yan[1,2] Shi, Chenglong[2] Zhao, Bo[1] Di, Dongliu[1] Xiao, Jiang[1] Chen, Guangcai[1]

第一作者：Chen, Yan

通信作者：Xiao, J[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China;[2]Qinghai Minzu Univ, Sch Chem & Mat Sci, Xining 810007, Peoples R China

年份：2025

卷号：1022

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;EI(收录号：20251318116504);Scopus(收录号：2-s2.0-105000713844);WOS:【SCI-EXPANDED(收录号:WOS:001456819100001)】；

基金：This work was supported by the Fundamental Research Funds of CAF (CAFYBB2022SY012) and National Natural Science Foundation of China (32101370) , Zhejiang Provincial Department of Science and Technology (2023SDXHDX0006) and Zhejiang Provincial Ten Thousand Talents Program for Leading Talents of Science and Technology Innovation (2021R52047) .

语种：英文

外文关键词：Co-hydrothermal; Hydrochars; Phytoremediation-derivative; Hydroxyapatite; Heavy metals; Safe utilization

摘要：The safe management of massive phytoremediation-derived biomass (PB), which contains accumulated heavy metals (HMs), presents a significant challenge amidst the rapid development of phytoremediation technologies. In this study, the PB was converted to hydrochar composite with safety, function and application potential through co-hydrothermal carbonization (co-HTC) with bone meal (BM). The hydrochar composites obtained under different process parameters were first subjected to the Toxicity Characteristic Leaching Procedure (TCLP) test, confirming compliance with international regulatory standards (0.5 mg/kg for Cd and 25 mg/kg for Zn). The leaching levels of Cd and Zn from hydrochar composites and PB-derived hydrochar were further compared to assess the relative stability of Cd and Zn in the hydrochar composites following co-HTC treatment. The hydrochar composite prepared under the optimal process parameters obtained through Response Surface Methodology (RSM)-220 degrees C reaction temperature, 65.16 min residence time, 15.94 % solid loading, and a 28.60 % PB ratio in raw materials-exhibited Cd and Zn stabilities of 94.31 % and 82.41 %, respectively. Additionally, the hydrochar composite demonstrated primarily composed of hydroxyapatite (HAP) and hydrochar and excellent adsorption capacity for Cd2+ and Zn2+ in aqueous solutions, reaching 42.08 mg/g and 29.44 mg/g, respectively, at pH 6.0 +/- 0.05 and a temperature of 298.15 K. The primary sorption mechanisms include surface complexation, cation exchange, electrostatic attraction, ionization-precipitation, and cation-pi interactions (Cation-aromatic interactions). In summary, this study presents a safe and value-added approach for the treatment of biomass derived from phytoremediation processes containing HMs, thereby enabling the high-value processing of dual waste streams.