Department of Environment and Energy, Sejong University, Seoul, 05006, South Korea.
Department of food and biotechnology, South Ural State University, Chelyabinsk, Russia.
Chemosphere. 2022 Nov;307(Pt 2):135809. doi: 10.1016/j.chemosphere.2022.135809. Epub 2022 Aug 4.
Herein, magnetic polyaniline was modified with lanthanum nanoparticles (MPANI@La) as adsorbent, aiming to the treatment of high phosphate-containing aquatic solutions. High valent lanthanum doped with polyaniline was a promising adsorbent to uptake phosphate ions with possible electrostatic interaction and cation exchange process. The functional groups, composition, surface morphology, and magnetic property of the adsorbent were investigated using Fourier Transform-Infrared Spectroscopy (FTIR), Energy Dispersive X-ray (EDX), Scanning Electron Microscopic (SEM), and Vibrating Sample Magnetometer (VSM), respectively. During the experimental process, MPANI@La has removed phosphate ions from water >90%, with 80 mg adsorbent, and shaking for 150 min at room temperature. In this regard, the process was fitted with the Pseudo-second-order kinetic model (R2 > 0.999) and the Langmuir isotherm (R2 > 0.99). The proposed nanoparticles provided an appropriate adsorption capacity (qm) of 45.24 mg.g-1 at pH 4 for phosphate ions. Besides, the adsorbent can be used with an efficiency of 92.49% up to three times that reduced to 52.89% after ten times. In addition, the adsorption process was justified by thermodynamics which confirmed the proposed adsorption mechanism. Hence, the models were provided surface adsorption, monolayer pattern, and the physical mechanism of the phosphate removal process using MPANI@La. Hence the proposed adsorbent can be used as an alternative adsorbent in environmental water remediation.
在此，将镧纳米粒子修饰的磁性聚苯胺（MPANI@La）用作吸附剂，以处理高磷含量的水溶液。掺杂高价镧的聚苯胺是一种很有前途的吸附剂，可以通过静电相互作用和阳离子交换过程来吸附磷酸根离子。使用傅里叶变换红外光谱（FTIR）、能谱（EDX）、扫描电子显微镜（SEM）和振动样品磁强计（VSM）分别对吸附剂的官能团、组成、表面形貌和磁性进行了研究。在实验过程中，MPANI@La 用 80mg 吸附剂，在室温下振荡 150min，可从水中去除超过 90%的磷酸根离子。在这方面，该过程符合拟二级动力学模型（R2>0.999）和 Langmuir 等温线（R2>0.99）。所提出的纳米粒子在 pH 4 时对磷酸根离子提供了合适的吸附容量（qm）为 45.24mg·g-1。此外，该吸附剂可使用三次，效率为 92.49%，十次后降低至 52.89%。此外，热力学证实了所提出的吸附机制，从而证明了吸附过程。因此，提出的模型提供了表面吸附、单层模式和使用 MPANI@La 去除磷酸根的物理机制。因此，所提出的吸附剂可用作环境水修复中的替代吸附剂。
