The green reduction method uses pomegranate peel extract as a reducing agent to prepare nZVI on a Trametes suaveolens biochar(T-BC/nZVI) carrier for the removal of hexavalent chromium in the aqueous solution. The effects of several factors, including different ratios between m(CS) and m(Fe), different initial Cr(VI) concentrations, pH, and temperature, were evaluated. When the dosage was 5 g/L at pH = 2 and the initial Cr(VI) concentration was 50 mg/L, the removal of Cr(VI) efficiency was approximately 100% within 90 min. Cr(VI) removal of T-BC/nZVI composites conforms to the quasi-secondary kinetics model, indicating that Cr(VI) removal was dominated by chemisorption. Through a variety of technologies (SEM, XRD, FTIR, BET, and XPS), it was confirmed that nZVI was successfully loaded on the surface of T-BC and effectively removed of hexavalent chromium. The removal mechanisms of Cr(VI) by T-BC/nZVI composites involve multiple processes (adsorption, reduction, and co-precipitation).

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中文翻译：

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负载于纳米级零价铁颗粒上的Trametes suaveolens衍生生物炭用于Cr（VI）的吸附和还原

绿色还原法使用石榴皮提取物作为还原剂，在Trametes suaveolens生物炭（T -BC / nZVI）载体上制备nZVI，以去除水溶液中的六价铬。评估了几个因素的影响，包括m（CS）和m（Fe）之间的比率不同，Cr（VI）初始浓度，pH和温度的不同。当剂量为5 g / L（pH = 2）且初始Cr（VI）浓度为50 mg / L时，在90分钟内去除Cr（VI）的效率约为100％。Cr（VI）去除T-BC / nZVI复合材料符合准二级动力学模型，表明Cr（VI）的去除主要受化学吸附作用的影响。通过多种技术（SEM，XRD，FTIR，BET和XPS），已确认nZVI已成功加载到T-BC的表面上并有效去除了六价铬。T -BC / nZVI复合材料去除Cr（VI）的机理涉及多个过程（吸附，还原和共沉淀）。

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