Ofudje Edwin Andrew, Al-Ahmary Khairia Mohammed, Alshdoukhi Ibtehaj F, Alrahili Mazen Rzeeg, Kavil Yasar N, Alelyani Saeed Saad, Bakheet Ammar M, Al-Sehemi Abdullah G
Department of Chemical Sciences, Mountain Top University, Ibafo, Ogun State, Nigeria.
Department of Chemistry, College of Science, University of Jeddah, Jeddah, Saudi Arabia.
Sci Rep. 2024 Apr 2;14(1):7809. doi: 10.1038/s41598-024-57412-4.
Nano round polycrystalline adsorbent (NRPA) of chicken bones origin was utilize as effective adsorbent in Congo red dye removal via aqueous media. The NRPA adsorbent was prepared via thermal decomposition and its structure was investigated with the aids of Transmission Electron Microscopy, Fourier Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy, Energy Dispersive X-ray Analysis (EDX), and X-ray Diffractometer (XRD). A monophasic apatite phase was confirmed from XRD investigation, while functional groups analysis showed that NRPA possessed CO PO and OH absorption bands. The maximum adsorption capacities derived from Langmuir isotherm is 98.216 mg g. From the combined values of n from Freundlich and separation factor (R) of Langmuir models, the adsorption of CR by NRPA is favourable. Thermodynamic values of 5.280 kJ mol and 16.403 kJ mol K were found for ΔH° and ΔS° respectively. The entire values of ΔG° which ranges from - 35.248 to - 459.68 kJ mol were all negative at different temperatures. Thus, nano polycrystalline adsorbent of chicken bone origin can serve as excellent adsorbent in Congo red dye removal from waste water.
以鸡骨为原料的纳米圆形多晶吸附剂（NRPA）被用作通过水介质去除刚果红染料的有效吸附剂。NRPA吸附剂通过热分解制备，并借助透射电子显微镜、傅里叶红外光谱（FT-IR）、扫描电子显微镜、能量色散X射线分析（EDX）和X射线衍射仪（XRD）对其结构进行了研究。XRD研究证实了单相磷灰石相，而官能团分析表明NRPA具有CO、PO和OH吸收带。根据朗缪尔等温线得出的最大吸附容量为98.216 mg g。从弗伦德里希等温线的n值和朗缪尔模型的分离因子（R）的综合值来看，NRPA对CR的吸附是有利的。分别发现ΔH°和ΔS°的热力学值为5.280 kJ mol和16.403 kJ mol K。在不同温度下，ΔG°的整个值范围为-35.248至-459.68 kJ mol，均为负值。因此，鸡骨来源的纳米多晶吸附剂可作为从废水中去除刚果红染料的优良吸附剂。
