文献类型：期刊文献

英文题名：Oyster shell powder-loaded cellulose gel beads as a high-efficiency adsorbent for phosphorus recovery: preparation, kinetics, isotherms and thermodynamic studies

作者：Wu, Pingguo[1];Zhong, Jiyan[1];Liang, Naisi[1];Li, Chanyan[1];Cao, Qingyue[1];Zhao, Mingjuan[1];Li, Yong[1];Liao, Mingneng[1];Yu, Chuanming[1]

机构：[1]Guangdong Ocean Univ, Fac Chem & Environm Sci, Zhanjiang 524088, Peoples R China

年份：2024

卷号：14

期号：37

起止页码：27449

外文期刊名：RSC ADVANCES

收录：SCI-EXPANDED(收录号：WOS:001300037900001)、、EI(收录号：20243616994887)、Scopus(收录号：2-s2.0-85202795914)、WOS

基金：This work was financially supported by the Science and Technology Program of Zhanjiang City (2022A01064), Scientifc Research Start-up Funds of Guangdong Ocean University (R18018), Postgraduate Education Innovation Project of Guangdong Ocean University (202329), Innovation and Entrepreneurship Training Programme of Guangdong Ocean University (S202310566060), Innovation Team Project of Guangdong Ocean University (CXTD2024016).

语种：英文

外文关键词：Adsorption isotherms

外文摘要：Given the critical importance, resource limination and environmental toxicity of phosphorus, the study of phosphorus recovery and utilization is extremely urgent. This paper utilized unmodified oyster shell powder (OSP) and cotton fibers as raw materials to prepare OSP-loaded cellulose gel beads (OSP@Gel) through the fiber-dissolving capability of LiBr3H2O molten salt, for phosphate recovery from water. The surface microstructure and chemical properties of OSP@Gel were characterized by using Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS), confirming the loading of OSP onto the gel matrix. The phosphorus adsorption capacity of a single OSP@Gel bead could reach up to 8.80 +/- 0.32 mg at the optimal OSP doping amount of 1.0 g and optimal pH of 5.0. Kinetic and isotherm analyses revealed that the experimental data fit the PSO model and the Langmuir model. Thermodynamic analysis suggested that the phosphate adsorption was endothermic. Combined results from SEM and XPS analyses indicated that the adsorption of phosphate by OSP@Gel was chemical, with adsorption rate controlled by both liquid film diffusion and intraparticle diffusion. The high phosphate adsorption capacity, good mechanical stability in water, and easy degradability in plant soil provide OSP@Gel beads with great potential for phosphate recovery. A cellulose-based monolithic gel on which oyster shell powder is immobilized, resulting in a green bead (OSP@Gel) capable of efficiently recovering phosphate from water.