Finding effective methodologies for the removal of heavy metals from contaminated water are really significant. Facile and “green” techniques for adsorbents fabrication are in high demand to satisfy a wide range of practical applications. This report presents of an efficient method for preparing Fe₃O₄@ layered double hydroxide@ guargum bionanocomposites (GLF-BNCs). First of all, the LDH coated Fe₃O₄ nanoparticles were simply synthesized, using ultrasonic irradiation. The citrate coated Fe₃O₄ nanoparticles which were under negative charging and LDH nanocrystals which were charged positively make electrostatic interaction which formed a stable self-assembly component, and then guargum as a biopolymer were linked onto Fe₃O₄@LDH via an in situ growth method. Furthermore, the GLF-BNCs had the ability to remove cadmium ions (Cd²⁺) from the aqueous solutions. Adsorption studies indicate that the Langmuir isotherm model and the kinetic model in pseudo-second order were appropriate for Cd(II) removal. The maximum Cd(II) adsorption capacity of the GLF8% was 258 mg g⁻¹. The Cd(II) was adsorbed from aqueous solutions very quickly with the contact time of 5 min by the GLF 8%, suggesting that GLF-BNCs may be a promising adsorbent for removing Cd(II) from wastewater. The effect of Fe₃O₄@LDH contents (2, 4 and 8 wt.%) on the thermal, physicomechanical, and morphological properties of guargum were investigated by Fourier transform infrared spectroscopy, X-ray diffraction (XRD), thermal gravimetric analysis (TGA), field emission scanning electron microscopy, transmission electron microscopy (TEM), Energy-dispersive X-ray spectroscopy and Brunauer–Emmett–Teller (BET) specific surface area techniques. The TEM results indicated that the LDH platelets are distributed within the polymer matrix.

寻找有效的方法从污染水中去除重金属确实非常重要。为了满足广泛的实际应用，对用于吸附剂制造的简便和“绿色”技术有很高的要求。该报告提出了一种高效的制备Fe ₃ O ₄层状双氢氧化物-双胍复合材料（GLF-BNCs）的方法。首先，使用超声辐射简单地合成了LDH涂层的Fe ₃ O ₄纳米颗粒。柠檬酸盐包覆的Fe ₃ O ₄带负电的纳米颗粒和带正电的LDH纳米晶体之间发生静电相互作用，形成稳定的自组装组分，然后通过原位生长方法将作为生物聚合物的guargum连接到Fe ₃ O ₄ @LDH上。此外，GLF-BNC具有从水溶液中去除镉离子（Cd ²⁺）的能力。吸附研究表明，Langmuir等温线模型和伪秒级动力学模型适用于Cd（II）的去除。GLF8％的最大Cd（II）吸附容量为258 mg g ^-1。Cd（II）在GLF 8％的作用下，以5分钟的接触时间很快地从水溶液中吸附，这表明GLF-BNCs可能是从废水中去除Cd（II）的有前途的吸附剂。通过傅里叶变换红外光谱，X射线衍射（XRD），热重分析法研究了Fe ₃ O ₄ @LDH含量（2、4和8 wt。％）对胶的热学，物理力学和形态学性能的影响。 （TGA），场发射扫描电子显微镜，透射电子显微镜（TEM），能量色散X射线光谱法和Brunauer-Emmett-Teller（BET）比表面积技术。TEM结果表明LDH血小板分布在聚合物基质中。