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Sains Malaysiana 54(5)(2025): 1393-1403
http://doi.org/10.17576/jsm-2025-5405-15
Physicochemical Properties of Silicate- and Oleate-
Nanoparticles for Heavy Metal Removal Applications
(Sifat Fizikokimia bagi Nanozarah Silikat dan Oleat untuk Aplikasi Penyingkiran Logam Berat)
NORA’AINI
ALI1, LAILI CHE ROSE2,*, NUR
RAFIQAH ABDUL RAZAK2, NURUL SYAHIRAH AZMAN1, NORHAFIZA
ILYANA YATIM3 & NOR AZMAN KASAN3
1Faculty of Ocean Engineering
Technology, University Malaysia Terengganu, 21030 Kuala Nerus,
Terengganu, Malaysia
2Faculty of Science and Marine
Environment, Universiti Malaysia Terengganu, 21030
Kuala Nerus, Terengganu, Malaysia
3Higher Institution Centre of
Excellence (HICoE), Institute of Tropical Aquaculture
and Fisheries, Universiti Malaysia Terengganu, 21030,
Kuala Nerus, Terengganu, Malaysia
Diserahkan: 3
September 2024/Diterima: 4 Februari 2025
Abstract
Utilizing magnetic nanoparticles (MN) to extract heavy metal
ions from wastewater is a promising method for metal recovery and can reduce secondary
waste production. The objective of this study was to evaluate the changes in
physicochemical characteristics of silicate-nanoparticles (MNs-SiO) and oleate-nanoparticles (MNs-C-COOH) prepared via the
biocompatible W/O microemulsion technique. The characteristics and properties
of MNs-SiO and MNs-C-COOH nanoparticles were
investigated by Scanning Electron Microscope (SEM), Fourier Transform Infrared
(FTIR), X-ray Diffraction (XRD), and Vibrating-sample magnetometer (VSM). The
performance of this nanoparticles (MNs-SiO), and
(MNs-C-COOH) (MNs-SiO), and (MNs-C-COOH) as adsorbents
were evaluated for removal of selected heavy metal ions, nickel (Ni2+),
manganese (Mn2+) and lead (Pb2+) at different
modification agent and pH. It was found that MNs-SiO adsorbent was highly favourable towards Pb2+ (673.4 mg/g) at pH 3, followed by Mn2+ (544.8
mg/g) and Ni2+ (182.43 mg/g) at pH 7, respectively. The MNs-C-COOH
adsorbent indicated the high adsorption of Ni2+, which was 254 mg/g
at pH 6. For commercial magnetic nanoparticles adsorbent, showed high selection
towards Pb2+, 660.13 mg/g at pH 6 and other ions showed less than 5%
removal. The performance of modifying agents can be explored as their
performance is significantly better than commercial magnetic nanoparticle
adsorbents, which can potentially be used in wastewater treatment or recovery
of targeted heavy metal ions.
Keywords: Adsorbent; adsorption
capacity; microemulsion technique; nanoparticles; oleate-magnetic;
silicate-magnetic
Abstrak
Penggunaan nanozarah magnetik (MN) untuk pengekstrakan ion logam berat daripada air sisa adalah kaedah yang berpotensi kerana menawarkan kelebihan seperti pemisahan yang mudah, penjanaan semula, kemungkinan pemulihan logam dan pengurangan penjanaan sisa sekunder. Objektif kajian ini adalah untuk menilai keberkesanan dan potensi nanozarah silikat-magnet terubah suai (MNs-SiO) dan nanozarah oleat-magnet (MNs-C-COOH) telah disediakan melalui teknik mikroemulsi W/O keserasian bio. Ciri dan sifat nanozarah besi oksida magnet yang diubah suai telah dikaji oleh mikroskopi elektron penskanan (SEM), Fourier Transformasi Inframerah (FTIR), X-ray Difraction (XRD) dan Vibrating-sample
magnetometer (VSM). Prestasi penjerap magnet yang diubah suai dinilai untuk penyingkiran ion logam berat terpilih, nikel (Ni2+), mangan (Mn2+) dan plumbum (Pb2+) pada agen pengubah suai dan pH yang berbeza. Didapati bahawa penjerap MNs-SiO adalah bersesuaian terhadap Pb2+ (673.4 mg/g) pada pH 3, diikuti oleh Mn2+ (544.8 mg/g) dan Ni2+ (182.43 mg/g) masing-masing pada pH 7. Penjerap MNs-C-COOH menunjukkan penjerapan Ni2+ yang tinggi, iaitu 254 mg/g pada pH 6. Bagi penjerap nanozarah komersial, menunjukkan selektif tinggi terhadap Pb2+,
660.13 mg/g pada pH 6 dan ion-ion lain menunjukkan penyingkiran kurang daripada 5%. Prestasi agen pengubahsuai boleh diterokai kerana prestasinya jauh lebih baik daripada penjerap nanozarah komersial yang berpotensi untuk digunakan sebagai rawatan air sisa atau pemulihan ion logam berat yang disasarkan.
Kata kunci: Kapasiti penjerapan; nanozarah; oleat-magnetik; penjerap; silikat-magnetik; teknik mikroemulsi
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*Pengarang untuk surat-menyurat;
email: hafiza.ilyana@umt.edu.my
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