Li Boxuan, Wen Shaoxin, Li Jiacheng, He Dedong, Luo Yongming, Zheng Xiangqian, Chen Dingkai
Faculty of Chemical Engineering, Kunming University of Science and Technology Kunming 650500 P. R. China
The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province Kunming 650500 P. R. China.
RSC Adv. 2025 Jan 2;15(1):48-57. doi: 10.1039/d4ra07237e.
Polysilicate-ferric-calcium-lanthanum (PSFCL) was synthesized through a co-polymerization method in order to treat the yellow phosphorus wastewater. Its morphology, composition and functional group were analyzed by X-ray Diffraction (XRD), Fourier Transform-Infrared Spectroscopy (FTIR), Scanning Electron Microscopic (SEM) and X-ray Photoelectron Spectroscopy (XPS), respectively. The optimization of the flocculant was also investigated, including La/Si molar ratio, pH, agitation time, dosage and sedimentation time. Results showed that PSFCL has reached an excellent removal efficiency of 95% and 97% towards phosphorus and fluoride, respectively. It could be inferred that charge neutralization, bridging effect and ligand exchange were the main coagulation mechanisms. As a whole, after the introduction of lanthanum, PSFCL was found to be a promising flocculant in yellow phosphorus wastewater treatment owing to its high removal efficiency and simple synthesis route.
为处理黄磷废水，通过共聚法合成了聚硅酸铁钙镧（PSFCL）。分别采用X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和X射线光电子能谱（XPS）对其形态、组成和官能团进行了分析。还研究了絮凝剂的优化，包括镧/硅摩尔比、pH值、搅拌时间、投加量和沉降时间。结果表明，PSFCL对磷和氟的去除率分别达到了95%和97%，效果优异。可以推断，电荷中和、架桥作用和配体交换是主要的混凝机制。总体而言，引入镧后，PSFCL因其去除效率高且合成路线简单，被认为是一种有前景的黄磷废水处理絮凝剂。
