PMID- 35973504
OWN - NLM
STAT- MEDLINE
DCOM- 20220929
LR  - 20220929
IS  - 1879-1298 (Electronic)
IS  - 0045-6535 (Linking)
VI  - 307
IP  - Pt 3
DP  - 2022 Nov
TI  - MgO coated magnetic Fe(3)O(4)@SiO(2) nanoparticles with fast and efficient 
      phosphorus removal performance and excellent pH stability.
PG  - 135972
LID - S0045-6535(22)02465-1 [pii]
LID - 10.1016/j.chemosphere.2022.135972 [doi]
AB  - A regenerable MgO-coated magnetic Fe(3)O(4)@SiO(2) (FSM) composite effectively 
      avoided the agglomeration of nano-MgO, which was resoundingly used for efficient 
      and rapid phosphorus removal from aqueous solutions. Based on an initial 
      screening of synthesized FSM with different Mg/citric acid molar ratios in terms 
      of phosphorus adsorption capacity, an FSM composite with a Mg-citric acid molar 
      ratio of 1:1 (FSM-1:1) was determined as the optimal choice. Scanning electron 
      microscope (SEM), Fourier transform infrared (FTIR) and X-ray diffraction (XRD) 
      showed that the prepared Fe(3)O(4) was triumphantly loaded and the nano-MgO 
      nanoparticles were evenly distributed on the surface of magnetic mesoporous 
      silica. N(2) adsorption-desorption experiments manifested that FSM-1:1 had a 
      large specific surface area of 124.3 m(2)/g and the pore size distribution 
      calculated based on the BJH model was centered at 9.36 nm. Furthermore, FSM-1:1 
      not only exhibited fast adsorption kinetics (60 min) but also had a high maximum 
      theoretical adsorption capacity of 223.6 mg P/g, which was superior to all the 
      other Mg-based adsorbents. Remarkably, due to the coating of MgO, FSM-1:1 
      exhibited ultra-high stability in the pH range of 3-11, a wider range than many 
      other Mg-modified sorbents. Our adsorbents also showed excellent selectivity for 
      phosphate anions even in the presence of various coexisting anions (e. g. 
      NO(3)(-), Cl(-) and SO(4)(2-)) with varying ionic strengths (0.01 and 0.1 M), 
      good recyclability, the removal rate of phosphate still reached 89.0% after three 
      cycles. Electrostatic attraction, Lewis acid-base interaction and the ligand 
      exchange between Mg-OH and phosphate anions were responsible for the phosphate 
      adsorption mechanisms.
CI  - Copyright (c) 2022 Elsevier Ltd. All rights reserved.
FAU - Li, Shuangli
AU  - Li S
AD  - Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of 
      Education, China), School of Environmental Science and Technology, Dalian 
      University of Technology, Dalian, 116024, PR China.
FAU - Zhang, Yu
AU  - Zhang Y
AD  - Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of 
      Education, China), School of Environmental Science and Technology, Dalian 
      University of Technology, Dalian, 116024, PR China.
FAU - Qiao, Sen
AU  - Qiao S
AD  - Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of 
      Education, China), School of Environmental Science and Technology, Dalian 
      University of Technology, Dalian, 116024, PR China. Electronic address: 
      qscyj@mail.dlut.edu.cn.
FAU - Zhou, Jiti
AU  - Zhou J
AD  - Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of 
      Education, China), School of Environmental Science and Technology, Dalian 
      University of Technology, Dalian, 116024, PR China.
LA  - eng
PT  - Journal Article
DEP - 20220813
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Lewis Acids)
RN  - 0 (Ligands)
RN  - 0 (Phosphates)
RN  - 0 (Water Pollutants, Chemical)
RN  - 27YLU75U4W (Phosphorus)
RN  - 2968PHW8QP (Citric Acid)
RN  - 7631-86-9 (Silicon Dioxide)
SB  - IM
MH  - Adsorption
MH  - Citric Acid
MH  - Hydrogen-Ion Concentration
MH  - Kinetics
MH  - Lewis Acids
MH  - Ligands
MH  - Magnetic Phenomena
MH  - *Nanoparticles
MH  - Phosphates
MH  - Phosphorus
MH  - Silicon Dioxide
MH  - *Water Pollutants, Chemical/analysis
OTO - NOTNLM
OT  - Adsorption
OT  - Magnesium oxide
OT  - Magnetic nanoparticles
OT  - Phosphorous removal
OT  - pH stability
COIS- Declaration of competing interest The authors declare that they have no known 
      competing financial interests or personal relationships that could have appeared 
      to influence the work reported in this paper.
EDAT- 2022/08/17 06:00
MHDA- 2022/09/30 06:00
CRDT- 2022/08/16 19:23
PHST- 2022/05/22 00:00 [received]
PHST- 2022/08/02 00:00 [revised]
PHST- 2022/08/03 00:00 [accepted]
PHST- 2022/08/17 06:00 [pubmed]
PHST- 2022/09/30 06:00 [medline]
PHST- 2022/08/16 19:23 [entrez]
AID - S0045-6535(22)02465-1 [pii]
AID - 10.1016/j.chemosphere.2022.135972 [doi]
PST - ppublish
SO  - Chemosphere. 2022 Nov;307(Pt 3):135972. doi: 10.1016/j.chemosphere.2022.135972. 
      Epub 2022 Aug 13.