Abstract The impregnation of magnetite (Mt) nanoparticle (NPs) onto Musa acuminata peel (MApe), to form a novel magnetic combo (MApe-Mt) for the adsorption of anionic bromophenol blue (BPB) was studied. The SEM, EDX, BET, XRD, FTIR and TGA were used to characterize the adsorbents. The FTIR showed that the OH and C O groups were the major sites for BPB uptake onto the adsorbent materials. The average Mt crystalline size on MApe-Mt was 21.13 nm. SEM analysis revealed that Mt NPs were agglomerated on the surface of the MApe biosorbent, with an average Mt diameter of 25.97 nm. After Mt impregnation, a decrease in BET surface area (14.89 to 3.80 m2/g) and an increase in pore diameter (2.25–3.11 nm), pore volume (0.0052–0.01418 cm3/g) and pH point of zero charge (6.4–7.2) was obtained. The presence of Pb(II) ions in solution significantly decreased the uptake of BPB onto both MApe (66.1–43.8%) and MApe-Mt (80.3–59.1%), compared to other competing ions (Zn(II), Cd(II), Ni(II)) in the solution. Isotherm modeling showed that the Freundlich model best fitted the adsorption data (R2 > 0.994 and SSE

中文翻译：

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用于吸附阴离子染料的磁性纳米颗粒-尖瓣果皮复合物的高效合成

摘要 研究了将磁铁矿 (Mt) 纳米颗粒 (NPs) 浸渍到 Musa acuminata 果皮 (MApe) 上，形成一种用于吸附阴离子溴酚蓝 (BPB) 的新型磁性组合 (MApe-Mt)。SEM、EDX、BET、XRD、FTIR 和 TGA 用于表征吸附剂。FTIR 表明 OH 和 CO 基团是吸附剂材料吸收 BPB 的主要位点。MApe-Mt 上的平均 Mt 晶体尺寸为 21.13 nm。SEM 分析显示 Mt NPs 聚集在 MApe 生物吸附剂的表面，平均 Mt 直径为 25.97 nm。Mt 浸渍后，BET 表面积减少（14.89 至 3.80 m2/g），孔径增加（2.25–3.11 nm）、孔体积（0.0052–0.01418 cm3/g）和零电荷 pH 点（6.4– 7.2) 获得。与其他竞争离子（Zn（II）、Cd（II）相比，溶液中 Pb（II）离子的存在显着降低了 BPB 在 MApe（66.1-43.8%）和 MApe-Mt（80.3-59.1%）上的吸收） ), Ni(II)) 在溶液中。等温线模型表明 Freundlich 模型最适合吸附数据（R2 > 0.994 和 SSE