Department of Chemistry, Anna University, University College of Engineering - Dindigul, Reddiyarchatram, Dindigul 624 622, Tamilnadu, India.
Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; Yonsei Frontier Lab, Yonsei University, Seoul, Korea.
Int J Biol Macromol. 2021 Feb 15;170:13-23. doi: 10.1016/j.ijbiomac.2020.12.016. Epub 2020 Dec 28.
The porous, definite and nitrogen rich triaminotriazine (TAT) grafted graphene oxide (GO) known as TATGO composite was developed for nutrients (NO and PO) retention. Additionally, the structural property of TATGO composite was improved with the use of chitosan (CS) to produce easily separable TATGO@CS hybrid beads which possess the significant NO and PO adsorption capacities of 58.46 and 61.38 mg/g respectively than their individual materials. The instrumentations such as SEM, TGA, FTIR, EDAX, XRD and BET studies were executed for adsorbents. The optimization of the parameters accountable for adsorption process was performed in batch scale. The effect of isotherms (Langmuir, Freundlich and Dubinin-Radushkevich (D-R)), kinetics (pseudo-first/second order and particle/intraparticle diffusion) and thermodynamic parameters (ΔG°, ΔH° and ΔS°) of the adsorption was explored. The removal mechanism of TATGO@CS hybrid beads was to be electrostatic attraction on NO and PO. The field applicability and reuse of TATGO@CS hybrid beads was also inspected.
开发了具有多孔性、明确性和富含氮的三氨基三嗪（TAT）接枝氧化石墨烯（GO）的 TATGO 复合材料，用于保留营养物质（NO 和 PO）。此外，通过使用壳聚糖（CS）来改善 TATGO 复合材料的结构性能，以生产易于分离的 TATGO@CS 杂化珠，其具有显著的 NO 和 PO 吸附能力，分别为 58.46 和 61.38mg/g，高于其各自的材料。对吸附剂进行了 SEM、TGA、FTIR、EDAX、XRD 和 BET 研究等仪器分析。在批量规模下进行了吸附过程参数的优化。研究了吸附的等温线（朗缪尔、弗伦德利希和杜宾-拉什科夫斯基（D-R））、动力学（伪一级/二级和颗粒/内扩散）和热力学参数（ΔG°、ΔH°和ΔS°）的影响。TATGO@CS 杂化珠的去除机制是通过静电吸引对 NO 和 PO 进行吸附。还检查了 TATGO@CS 杂化珠的现场适用性和重复使用性。
