文献类型：期刊文献

英文题名：Optimization conversion of willow biomass derived from phytoremediation into value-added hydrochars: Effects of temperature and medium on Cd/Zn distribution and application potentials

作者：Zhao, Bo[1,2] Li, Haihua[2] Yang, Xiaoli[2] Zhao, Weibin[1] Chen, Yan[1] Di, Dongliu[1] Xiao, Jiang[1] Chen, Guangcai[1]

第一作者：Zhao, Bo

通信作者：Xiao, J[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China;[2]North China Univ Water Resources & Elect Power, Sch Environm & Municipal Engn, Zhengzhou 450046, Peoples R China

年份：2024

卷号：24

外文期刊名：ENERGY CONVERSION AND MANAGEMENT-X

收录：EI(收录号：20243616996746);Scopus(收录号：2-s2.0-85202934906);WOS:【ESCI(收录号:WOS:001307913500001)】；

基金：This work was supported by the National Natural Science Foundation of China (32101370) , Fundamental Research Funds of CAF (CAFYBB2022SY012) and Zhejiang Provincial Department of Science and Technology (2023SDXHDX0006) .

语种：英文

外文关键词：Hydrochar; Potentially toxic elements; Willow biomass; Safe utilization; Value-added biofuels; Adsorption

摘要：Effective treatment of plant biomass with potentially toxic elements (PTEs) is crucial for phytoremediation. Hydrothermal carbonization (HTC) offers an economical and eco-friendly solution by converting biomass into high-value hydrochar. However, the effects of reaction temperature and medium on the characteristics and metals distribution in hydrochars from PTEs-containing biomass remain unclear. This study explores the effects of different hydrothermal temperature (180-240 degrees C) and reaction media (H2O, HCl, H2SO4, H3PO4) on the hydrothermal properties of willow biomass containing PTEs, and the distribution and transfer rules of PTEs (Cd and Zn) and the application potential of hydrochar. The results indicated that hydrothermal temperature and acid medium significantly influenced WB conversion, affecting hydrochar properties such as carbonization degree and surface functional groups. Higher hydrothermal temperatures enhanced Cd and Zn fixation in the solid phase, while acid facilitated their migration to the liquid phase. More than 91.08 % of Cd and 88.41 % of Zn in the acid-added system are migrated into the liquid phase at hydrothermal temperature of 180 degrees C Hydrochar prepared under 180 degrees C and H3PO4 exhibited excellent adsorption performance for Cd2+ and Cu2+ (2.17 mg/g and 34.38 mg/g, respectively) in aqueous solution. Additionally, hydrochars exhibit high calorific values (20.52-28.01 MJ/kg), suggesting their potential as biofuel. This study provides technical foundation to support the resource processing and safe utilization of forest biomass containing PTEs.