磷酸盐
吸附
牡蛎
化学
废水
核化学
环境化学
环境工程
环境科学
有机化学
地质学
海洋学
作者
Ping Li,Jianxu Li,Weirui Chen,Xiao Guan,Bing Tang,Liying Bin,Shaosong Huang
标识
DOI:10.1016/j.scitotenv.2023.168432
摘要
The resource utilization of oyster shell (OS) is essential for environmental and human health because its random disposal can induce the environmental pollution and disease spread. Herein, MnFe2O4 loaded-oyster shell (OMFs) was prepared by co-precipitation method for phosphate removal and recovery. The salt etching and MnFe2O4 (MF) loading improved the adsorption performance of OS, and the maximum adsorption capacity of OMF0.02 reached 87.39 mg P/g. Phosphate adsorption was dominated by chemisorption and its rate was limited by membrane diffusion and intra-particle diffusion. Phosphate adsorption by OMF0.02 was involved with electrostatic attraction, surface precipitation and ligand exchange. 98.95 % phosphate on saturated adsorbent could be desorbed by 0.1 mol/L malic acid and 92.31 % adsorbed phosphate was released by 0.5 mol/L NaHCO3. Furthermore, phosphate adsorbed on OMF0.02 was plant-available basing on the results of water spinach growth trial. All the results implied the bright prospects of OMF0.02 in phosphate removal and recovery from wastewater.
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