TY - JOUR
T1 - Effects of dissolved organic matter on phosphorus recovery via hydroxyapatite crystallization
T2 - New insights based on induction time
AU - Li, Xiang
AU - Xu, Yuye
AU - Shen, Shuting
AU - Guo, Ting
AU - Dai, Hongliang
AU - Lu, Xiwu
N1 - Publisher Copyright:
© 2022
PY - 2022/5/20
Y1 - 2022/5/20
N2 - Recovery of phosphorus from sewage can help establish a new phosphorus cycle and hydroxyapatite (HAP) crystallization is a promising way. HAP crystallization is an amorphous calcium phosphate (ACP) mediated process, and its induction time reflects the rate of HAP nucleation, and seriously affects the efficiency of phosphorus recovery. In this study, the effects of different types of dissolved organic matter (DOM) on the induction time and phosphorus recovery performance of ACP-mediated HAP phosphorus recovery were studied, and the mechanism was analyzed by X-Ray Diffraction, Fourier transform infrared spectroscopy, and scanning electron micrograph with energy dispersive spectrometry. The results show that DOM greatly prolongs the induction time of ACP-mediated HAP crystallization and leads to an increase in the yield of microcrystals, thus leading to a decrease in phosphorus recovery efficiency. DOM inhibits ACP-mediated HAP crystallization by complexing lattice ions and occupying active growth sites on the crystal surface. Pre-removal of DOM can not only improve the speed and efficiency of phosphorus recovery by the HAP crystallization process but also improve product quality.
AB - Recovery of phosphorus from sewage can help establish a new phosphorus cycle and hydroxyapatite (HAP) crystallization is a promising way. HAP crystallization is an amorphous calcium phosphate (ACP) mediated process, and its induction time reflects the rate of HAP nucleation, and seriously affects the efficiency of phosphorus recovery. In this study, the effects of different types of dissolved organic matter (DOM) on the induction time and phosphorus recovery performance of ACP-mediated HAP phosphorus recovery were studied, and the mechanism was analyzed by X-Ray Diffraction, Fourier transform infrared spectroscopy, and scanning electron micrograph with energy dispersive spectrometry. The results show that DOM greatly prolongs the induction time of ACP-mediated HAP crystallization and leads to an increase in the yield of microcrystals, thus leading to a decrease in phosphorus recovery efficiency. DOM inhibits ACP-mediated HAP crystallization by complexing lattice ions and occupying active growth sites on the crystal surface. Pre-removal of DOM can not only improve the speed and efficiency of phosphorus recovery by the HAP crystallization process but also improve product quality.
KW - Amorphous calcium phosphate
KW - Dissolved organic matters
KW - Hydroxyapatite
KW - Induction time
KW - Phosphorus recovery
UR - https://www.scopus.com/pages/publications/85124245793
U2 - 10.1016/j.scitotenv.2022.153618
DO - 10.1016/j.scitotenv.2022.153618
M3 - Article
C2 - 35124042
AN - SCOPUS:85124245793
SN - 0048-9697
VL - 822
JO - Science of the Total Environment
JF - Science of the Total Environment
M1 - 153618
ER -