Effects of biomass co-pyrolysis and herbaceous plant colonization on the transformation of tailings into soil like substrate  

作　　者：Bin Zhu Meiyan Si Xin Xie Ximin Yan Jianhong Huang Senlin Tian Ping Ning 

机构地区：[1]Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500,China [2]Guizhou Research Institute of Coal Mine Design Co.,Ltd.,Guiyang 550025,China

出　　处：《Journal of Environmental Sciences》2025年第1期230-243,共14页环境科学学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.52060011).

摘　　要：Enhancing soil organic matter characteristics,ameliorating physical structure,mitigating heavy metal toxicity,and hastening mineral weathering processes are crucial approaches to accomplish the transition of tailings substrate to a soil-like substrate.The incorporation of biomass co-pyrolysis and plant colonization has been established to be a significant factor in soil substrate formation and soil pollutant remediation.Despite this,there is presently an absence of research efforts aimed at synergistically utilizing these two technologies to expedite the process of mining tailings soil substrate formation.The current study aimed to investigate the underlying mechanism of geochemical changes and rapid mineral weathering during the process of transforming tailings substrate into a soil-like substrate,under the combined effects of biomass co-smoldering pyrolysis and plant colonization.The findings of this study suggest that the incorporation of smoldering pyrolysis and plant colonization induces a high-temperature effect and biological effects,which enhance the physical and chemical properties of tailings,while simultaneously accelerating the rate of mineral weathering.Notable improvements include the amelioration of extreme pH levels,nutrient enrichment,the formation of aggregates,and an increase in enzyme activity,all of which collectively demonstrate the successful attainment of tailings substrate reconstruction.Evidence of the acceleratedweathering was verified by phase and surfacemorphology analysis using X-ray diffraction and scanning electron microscopy.Discovered corrosion and fragmentation on the surface ofminerals.The weathering resulted in corrosion and fragmentation of the surface of the treated mineral.This study confirms that co-smoldering pyrolysis of biomass,combined with plant colonization,can effectively promote the transformation of tailings into soil-like substrates.This method has can effectively address the key challenges that have previously hindered sustainable development of the mining indus

关 键 词：SMOLDERING Biomass co-pyrolysis Phytoremediation Soil-like substrate Tailing restoration 

分 类 号：TG1[金属学及工艺—金属学]