Abstract This study investigated the role of surface hydrophobicity/hydrophilicity of biochar on its pollutant leaching potential (pollutants originally in biomass feedstock), including nutrients, organic matter and metals, in water treatment applications. The study outcomes confirmed that biochar with greater hydrophilic surface leached comparatively higher loads of nutrients and organic matter compared to biochar with mostly hydrophobic surface, while biochar with greater hydrophilic surface leached lower metal loads. This trend is attributed to the changes to the physical and chemical properties of biochar including specific surface area and surface functional groups, as well as being related to the binding forces between the biochar surface and the different compounds. Further, the study results substantiated the significant influence of surface characteristics of biochar, and its preparation process on pollutant leaching potential. The study outcomes provide essential guidance on the appropriate use of biochar as an adsorbent in water treatment, including raw biomass selection and the production processes to be adopted.

中文翻译：

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评估表面疏水性/亲水性对水处理中生物炭污染物浸出潜力的影响

摘要 本研究调查了生物炭的表面疏水性/亲水性对其污染物浸出潜力（最初存在于生物质原料中的污染物）在水处理应用中的作用，包括养分、有机物和金属。研究结果证实，与表面大部分为疏水性的生物炭相比，具有更大亲水性表面的生物炭浸出的养分和有机物负荷相对较高，而具有更大亲水性表面的生物炭浸出的金属负荷较低。这种趋势归因于生物炭的物理和化学性质的变化，包括比表面积和表面官能团，以及生物炭表面与不同化合物之间的结合力。更多，研究结果证实了生物炭的表面特性及其制备工艺对污染物浸出潜力的显着影响。研究结果为在水处理中适当使用生物炭作为吸附剂提供了重要指导，包括原料生物质的选择和要采用的生产工艺。