Page 57 - Book of Abstracts 2020

th
8 Biannual Conference on Chemistry - CHEM 08

Comparative Analysis on Adsorption Properties and
Mechanisms of Nitrate and Phosphate 1 ions by a Zn

Fe3O4/SiO2 MCM-48 Magnetic Composite: Kinetic and
Isotherm Studies

2
Mahmoud Fathy , R. Hosny
1
2
1 Applications Department, Production Department, Egyptian Petroleum
Research Institute, AhmedEl-Zomer, Nasr City

ABSTRACT
In our research, the magnetic nanocomposite adsorbent Zn Fe3O4/SiO2 MCM-48
was 9 prepared , and the ability of this nanocomposite to remove phosphate and
nitrate ions from 10 synthetic wastewater was investigated. Various batch
adsorption conditions, including different 11 pH, temperature, contact time,
initial phosphate concentration, and adsorbent dosage 12 conditions, were
considered. Phosphate and nitrate adsorption kinetics were well fitted by the 13
pseudo-second-order kinetic model for all studied adsorbents.The adsorption
process was 14 represented by Langmuir isotherms.The thermodynamic
parameters ΔG, ΔH, and ΔS, which 15 were determined using the van’t Hoff
equation, indicated that the phosphate adsorption reactions 16 on the Zn
Fe3O4/SiO2 MCM-48nanocomposite were spontaneous and endothermic in
nature. The 17 optimal conditions for the adsorption of phosphate and nitrate
ions onto Zn Fe3O4/SiO2 MCM-48 18 were a pH of 2.0, temperature of 340 K, and
contact time of 66 minutes. The results presented 19 here support the potential
of using the Zn Fe3O4/SiO2 MCM-48magnetic nanocomposite as a 20 material for
the treatment of phosphate and nitrate ions in wastewater.

BOOK OF ABSTRACTS CHEM 08 (2020) Page 56