Screening of optimum composition of superparamagnetic nanocomposite microparticles modified with various layered double hydroxides for phosphorus removal
JOURNAL OF WATER PROCESS ENGINEERING, cilt.49, 2022 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 49
- Basım Tarihi: 2022
- Doi Numarası: 10.1016/j.jwpe.2022.103001
- Dergi Adı: JOURNAL OF WATER PROCESS ENGINEERING
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, INSPEC
- Anahtar Kelimeler: P removal, Magnetic NCMP, LDH, Dissolution, Stability, PHOSPHATE REMOVAL, WASTE-WATER, MAGNETITE NANOPARTICLES, RECOVERY, ADSORPTION, FE3O4, FABRICATION, DESORPTION, SEPARATION, PARTICLES
- Süleyman Demirel Üniversitesi Adresli: Evet
Özet
Superparamagnetic nanocomposite microparticles (NCMPs) modified with various layered double hydroxides (LDHs) (MgFe, MgAl and their Zr-doped equivalents) were investigated for phosphorus (P) removal. Screening of optimum composition was performed based on the P removal performance of NCMP@LDH particles as well as their magnetic separability in a flow-through column as a function of NCMP content (100-1000 mg) and stability as a function of LDH content (20-100%). The results showed that except for NCMP@MgFe-Zr, all the other particles exhibited a partial dissolution of LDH components at each of the examined LDH contents. However, NCMP@MgFe-Zr showed no dissolution up to a LDH content of 60% at all, whereas a partial dissolution occurred at a LDH content of 80 and 100%. Results of magnetic separability test revealed that the NCMP@MgFe-Zr composed of 500 mg magnetic particle (NCMP) and 60% LDH was separated from the solution with a separa-tion efficiency of 96.9%, while lower NCMP contents resulted in lower separation efficiencies. P removal effi-ciency and specific removal capacity of the NCMP@MgFe-Zr with the optimized composition was found to be 18.5% and 53.1 mg/g, respectively. The crystal structure, chemical composition, surface morphology, crystallite size and particle size distribution, functional groups and magnetic properties of the NCMP and NCMP@MgFe-Zr particles were confirmed by various characterization analysis. The observed results clearly demonstrates that the NCMP@MgFe-Zr with the optimized composition remained stable during the removal experiments and enabled the removal of P under the conditions of acidic pH and relatively high P concentration without LDH dissolution.