Data from: Fe3O4 nanoparticle coated mushroom source biomaterail for Cr(VI) polluted liquid treatment and mechanism research

Agrocybe cylindracea substrate-Fe3O4 (ACS-Fe3O4), a Fe3O4 nanoparticle coated biomaterial derived from agriculture waste from mushroom cultivating, was investigated to remove the hexavalent chromium ions (Cr(VI)) from aqueous solution. After modification, the material surface become uneven with polyporous and crinkly structure, improving the Cr-accommodation ability in a sound manner. Optimized by Taguchi method, Cr(VI) removal efficiency was up to 73.88% with 240min, 40°C, pH 3, Cr(VI) at 200 mg L-1, dosage at 12 g L-1, rpm at 200. The efficient ions removal was due to the combined effect of adsorption and redox. The effect of storage time of the material on Cr(VI) removal was small which enhanced its value in practical application. Results indicated that metal removal was mainly dependent on solution concentration, adsorbent dosage and treatment time. The experimental data obtained was successfully fitted with Langmuir isotherm model. Thermodynamic study indicated the endothermic nature of the process. The results confirmed that ACS-Fe3O4 as novel material, with the ability for long-term preservation, could be applied for heavy metal remove from wastewater as well as waste cycling.茶树菇基质负载四氧化三铁（ACS-Fe3O4）是一种以食用菌栽培农业废弃物为原料制备的四氧化三铁纳米颗粒包覆生物材料，本研究针对其从水溶液中去除六价铬离子（Cr(VI)）的性能展开了探究。改性后，该材料表面变得凹凸不平，呈现多孔褶皱结构，有效提升了其对铬离子的吸附容纳能力。通过田口方法（Taguchi method）优化后，在反应时长240min、温度40℃、pH值3、初始Cr(VI)浓度200 mg·L⁻¹、投加量12 g·L⁻¹、搅拌转速200 rpm的条件下，Cr(VI)去除率可达73.88%。该高效离子去除效果源于吸附与氧化还原的协同作用。材料的储存时长对Cr(VI)去除效果影响较小，这一特性提升了其实际应用价值。实验结果表明，重金属去除效果主要受溶液浓度、吸附剂投加量及反应时长影响。所得实验数据可通过朗缪尔等温模型（Langmuir isotherm model）进行良好拟合。热力学分析表明该去除过程为吸热过程。研究结果证实，ACS-Fe3O4作为一种新型材料，具备长期储存稳定性，可应用于废水中重金属的去除以及废弃物资源化循环利用。