Abstract Bio-based substances (BBS) obtained from composted urban biowaste and nanosponges obtained from β-cyclodextrins (βCD) were used as green source to produce biochar via pyrolysis performed under mild conditions. Pyrolysis conditions were optimized by means of TGA analysis, and different temperatures of pyrolysis were investigated. The resulting carbonaceous materials were characterized with several physicochemical techniques (elemental analysis, FTIR spectroscopy, XRD, SEM, surface area analysis, and zeta potential measurements). Additionally, the adsorption capacity of such materials was tested toward the removal of charged dyes from aqueous environment. Isothermal experiments carried out at circumneutral pH indicated an important charge-selectivity, which encourages their use as sustainable alternative materials in wastewater purification treatments. Moreover, the analysis of the adsorption capacity as a function of specific surface area of materials suggests the strategy to obtain carbonaceous solids with enhanced capacity in capture of polar molecules.

中文翻译：

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在低温下获得的可持续含氮生物炭作为环境应用的吸附材料：市政生物废物衍生物质和纳米海绵案例研究

摘要 从城市垃圾堆肥中获得的生物基物质 (BBS) 和从 β-环糊精 (βCD) 中获得的纳米海绵被用作绿色来源，通过在温和条件下进行热解来生产生物炭。通过TGA分析优化了热解条件，并研究了不同的热解温度。用几种物理化学技术（元素分析、FTIR 光谱、XRD、SEM、表面积分析和 zeta 电位测量）表征所得碳质材料。此外，还测试了此类材料从水性环境中去除带电染料的吸附能力。在中性 pH 值下进行的等温实验表明具有重要的电荷选择性，这鼓励将它们用作废水净化处理中的可持续替代材料。此外，对作为材料比表面积函数的吸附能力的分析表明了获得具有增强的极性分子捕获能力的碳质固体的策略。