Abstract：
In recent years, the research potential in utilizing biochars as adsorbents in adsorption processes has grown due to their eco-friendly and economical nature. However, biochar often possesses a negative surface charge that limits its affinity for binding anions. Nitric acid washing and pretreatment with Coriolus versicolor can break down the lignocellulosic structure in cotton stalk waste, facilitating the subsequent impregnation of Mg and Fe metal oxides. These pretreatment steps can lead to the production of diverse and functionalized biochars with higher adsorption capacities. In this study, cotton stalk waste was first washed with diluted nitric acid and then subjected to biological pretreatment by incubation with C. versicolor, followed by impregnation with Mg and Fe to obtain CV-CS/Fe and CV-CS/Mg biochars. The results showed that the applied pretreatments altered the physicochemical properties and significantly increased the phosphorus adsorption capacity. The adsorption capacities of CV-CS/Fe and CV-CS/Mg biochars were found to be 277.88 and 507.01 mg g-1, respectively. The results indicate that the incorporation of multiple metal oxide impregnates enhances P adsorption. Furthermore, in the kinetic study, pseudo-first-order and pseudo-second-order models provided a well fit, determining chemical adsorption as the main adsorption mechanism for phosphorus adsorption. The biochars demonstrated compatibility with Langmuir-Freundlich models. Overall, the findings suggest the possibility of synthesizing biochars with improved adsorptive properties through pretreatment, and these engineered biochars hold promising potential as effective adsorbents in the field. PRACTITIONER POINTS: Eco-friendly, natural, and economical biochar was synthesized. Biochar was produced via Coriolus versicolor pretreatment. High adsorption capacities of CV-PS/Mg biochars were found to be 507.01 mg g-1. Adsorption capacities of biochars can be improved by pretreatment.
摘要：
近年来,在利用生物炭作为吸附剂在吸附过程中的研究潜力已经增长由于其生态友好和经济的性质。然而,生物炭通常具有负表面电荷，这限制了其对结合阴离子的亲和力。硝酸洗涤和用云芝预处理可以破坏棉秆废料中的木质纤维素结构，有利于后续的Mg和Fe金属氧化物的浸渍。这些预处理步骤可以导致生产具有更高吸附能力的多种和官能化的生物炭。在这项研究中,首先用稀硝酸洗涤棉秆废料，然后通过与花色梭菌孵育进行生物预处理，然后用Mg和Fe浸渍以获得CV-CS/Fe和CV-CS/Mg生物炭。结果表明，预处理改变了磷的理化性质，并显着提高了磷的吸附能力。CV-CS/Fe和CV-CS/Mg生物炭的吸附容量分别为277.88和507.01mgg-1。结果表明，多种金属氧化物浸渍物的掺入增强了P的吸附。此外，在动力学研究中，伪一阶和伪二阶模型提供了很好的拟合，确定化学吸附是磷吸附的主要吸附机理。生物炭证明了与Langmuir-Freundlich模型的兼容性。总的来说,研究结果表明，通过预处理合成具有改善吸附性能的生物炭的可能性，这些工程生物炭在该领域具有作为有效吸附剂的潜力。实践要点：环保，自然,合成了经济的生物炭。生物炭是通过云芝预处理生产的。发现CV-PS/Mg生物炭的高吸附容量为507.01mgg-1。通过预处理可以提高生物炭的吸附能力。
