Functionalized hollow MnFe₂O₄ nanospheres: design, applications and mechanism for efficient adsorption of heavy metal ions

Abstract

A l-cysteine functionalized magnetic hollow MnFe2O4 nanosphere material has been synthesised, with high magnetism, large interior cavities, and high porosity and surface activity. It has high adsorption efficiency and regenerated adsorption capacity for the removal of Cr6+ and Pb2+ in contaminated water.

One-Step Pyrolysis Fabrication of Magnetic Bagasse Biochar Composites with Excellent Lead Adsorption Performance

“…28,29 Two characteristic peaks at 670 and 443 cm −1 corresponding to Fe−O and Mn−O vibrations were observed, indicating the presence of MnFe 2 O 4 . 30 The XPS survey spectrum and high-resolution XPS spectra were used to further explore the chemical composition of MFSCBB-MCs (Figure 2). The findings showed the presence of photoelectron peaks of C 1s, O 1s, Fe 2p, and Mn 2p in MFSCBB-MCs (Figure 2a).…”

Synthesis of thiol‐functionalized resin and its adsorption of heavy metal ions

“…[1][2][3][4] Industrial wastewater discharges are the major source of heavy metal ions, 5 which generally exist in aqueous solution as Pb 2+ , Ni 2+ , Hg 2+ , and so forth. [6][7][8][9] When consumed by humans wastewater containing heavy metal causes various diseases and is even carcinogenic. [10][11][12] Therefore, the World Health Organization has set the maximum concentration of Pb 2+ , Ni 2+ , and Hg 2+ in drinking water at 0.01, 0.02, and 0.001 mg/L, respectively.…”

“…The treatment of wastewater containing heavy metals has always been a topic of concern, which is related to human health 1–4 . Industrial wastewater discharges are the major source of heavy metal ions, 5 which generally exist in aqueous solution as Pb 2+ , Ni 2+ , Hg 2+ , and so forth 6–9 . When consumed by humans wastewater containing heavy metal causes various diseases and is even carcinogenic 10–12 .…”

Smart pH-Responsive Polyaniline-Coated Hollow Polymethylmethacrylate Microspheres: A Potential pH Neutralizer for Water Purification Systems

“… 29 − 31 Functionalized hollow micro- and nanospheres are finding applications in various fields such as catalysis, water purification, drug delivery, electronic materials, and so on. 32 , 33 Several physical and chemical methods have been developed for preparing functional hollow polymeric particles and polymethylmethacrylate (PMMA) is one such potential polymeric candidate. 34 − 37 Usually, the inert nature of most of the polymers restricts their application in various fields.…”

“…Polymeric adsorbents modified by surface coating with different types of active/functional materials have recently been gaining importance for the development of such materials for water purification. − Functionalized hollow micro- and nanospheres are finding applications in various fields such as catalysis, water purification, drug delivery, electronic materials, and so on. , Several physical and chemical methods have been developed for preparing functional hollow polymeric particles and polymethylmethacrylate (PMMA) is one such potential polymeric candidate. − Usually, the inert nature of most of the polymers restricts their application in various fields. Therefore, surface modification of polymers must be carried out to improve their physicochemical properties.…”