生物炭
化学
鸡粪
肥料
环境化学
吸附
胞外聚合物
金属
蒙脱石
重金属
细菌
农学
肥料
生物膜
热解
生物
有机化学
遗传学
作者
Chen Song,Zhiru Chen,Yue Zhao,Jie Li,Yaqi Gao,Shenghui Wang,Zimin Wei
标识
DOI:10.1016/j.biortech.2023.129115
摘要
The aim of this study was to assess the effectiveness of biochar and montmorillonite islands on heavy metal adsorptive immobilization and identify crucial driving factors and pathways during chicken manure composting. Compared to montmorillonite (6.74 and 89.25 mg/kg), biochar exhibited an obviously higher ability of Cu and Zn enrichment (41.79 and 167.77 mg/kg), might be attributed to its abundant active functional groups. Network analysis showed that compared to Cu, core bacteria positively and negatively related to Zn was obviously more and less in passivator islands, respectively, which might explain significantly higher Zn concentration. Structural Equation Model displayed that dissolved organic carbon (DOC), pH and bacteria were critical driving factors. Pretreatment of passivator packages, such as soaking in the solution being rich in DOC and inoculating specific microbial agents accumulating heavy metals via extracellular adsorption /intracellular interception would significantly improve the effectiveness of adsorptive passivation on heavy metals.
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