Agbadaola Michael Tope, Akinyemi Damilola Adeola, Famadewa Damilola Idowu, Adeojo Oluwamumiyo Dorcas, Michael-Agbadaola Olaitan, Babalola Jonathan Oyebamiji
Department of Chemical Sciences, Dominion University, Ibadan, Nigeria.
Biophysics, Institute of Molecular Biosciences (IMB), University of Graz, NAWI Graz, Graz, Austria.
Int J Phytoremediation. 2025 Jun 19:1-11. doi: 10.1080/15226514.2025.2521408.
Modification of adsorbent with nanomaterials has become a widely adopted method to improve their surface morphology and adsorption capacity. In the present study, seedpod (BTSP) was modified with unary NiO nanoparticle to form NiO-BTSP adsorbent for the removal of methylene blue (MB) from water. The functional, optical, and morphological properties of the synthesized adsorbent was characterized by Fourier transform infrared spectroscopy, UV-Vis Spectroscopy, Energy Dispersive X-Ray, and Scanning electron microscopy. Results showed formation of agglomerated particles with pore spaces that were loaded with dye molecules after adsorption. Adsorption studies revealed formation of multiple layers of dye molecules on the adsorbent at an optimum pH of 12 and maximum monolayer capacity of 357.14 mg/g. Kinetics modeling of the adsorption data showed that adsorption occurred through chemical interaction between the adsorbent and dye molecules to reach equilibrium in 60 min. Desorption experiments using different organic and inorganic acids and bases further revealed the reusability potential of the adsorbent with optimal regeneration obtained using as low as 0.01 M acetic acid.
用纳米材料对吸附剂进行改性已成为一种广泛采用的改善其表面形态和吸附能力的方法。在本研究中，用一元NiO纳米颗粒对豆荚（BTSP）进行改性，以形成用于从水中去除亚甲基蓝（MB）的NiO-BTSP吸附剂。通过傅里叶变换红外光谱、紫外可见光谱、能量色散X射线和扫描电子显微镜对合成吸附剂的功能、光学和形态特性进行了表征。结果表明，形成了团聚颗粒，吸附后孔隙中负载有染料分子。吸附研究表明，在最佳pH值为12时，吸附剂上形成了多层染料分子，最大单层容量为357.14 mg/g。吸附数据的动力学模型表明，吸附是通过吸附剂与染料分子之间的化学相互作用发生的，在60分钟内达到平衡。使用不同的有机和无机酸及碱进行的解吸实验进一步揭示了吸附剂的可重复使用潜力，使用低至0.01 M的乙酸可获得最佳再生效果。
