Sorption of cationic malachite green dye on phytogenic magnetic nanoparticles functionalized by 3-marcaptopropanic acid

Abstract

Phytogenic magnetic nanoparticles (PMNPs) fabricated fromFraxinus chinensisRoxb. leaves extract were functionalized by 3-mercaptopropionic acid (3-MPA) for the removal of toxic dye malachite green (MG) from aqueous solutions.

Encapsulated green magnetic nanoparticles for the removal of toxic Pb2+ and Cd2+ from water: Development, characterization and application

“…19-0629 (Wang et al, 2017;Guo et al, 2017;Zhang et al, 2011;Akbari, A., 2017). The peaks at 2θ = 30°, 35° and 62.9° were mainly hinting the existence of iron oxide/ PMNPs, as reported by Ali et al 2018aAli et al , 2018b. The average diameter/ crystallite size measurements of the PMNPs were also carried out by using Debye-Scherres equation and it was estimated about 35-40 nm, as previously reported in authors published report (Ali et al, 2018a).…”

“…Secondly, the pHPZC of the BMMCs was 2.19 ( Fig. 5c), as calculated by pH drift method reported by Ali et al 2018aAli et al , 2018b (Test-SVI). Hence, at pH <.pHPZC, the shell of the BMMCs was positively charged thereby improving electrostatic repulsion with the metals cations, and meanwhile the availability of higher amount of H + strength in solution battled the metals cations for vacant sites, which eventually prevented the removal of metals cations by BMMCs.…”

“…It was might be due to the space occupied by PMNPs (Huang et al, 2017). An absorption peak was grown (at 489 cm -1 ), and it can be appointed to Fe-O, confirming the existence of PMNPs in the PVA-SA mixture (Ali et al, 2018a(Ali et al, , 2018b. However, the chemical structure did not change significantly except color of the amalgam altered from light yellow to black after inserting PMNPs solution.…”

“…Various types of green magnetic NPs have been utilized for the elimination and recovery of metals from wastewaters, as documented previously (Ali et al, 2017a(Ali et al, , 2017bAli et al, 2018aAli et al, , 2018bAli et al, , 2018cAli et al, , 2018d. However, some real issues (low adsorptive capacity and poor stability for long-term applications due to the oxidation or etching or dissolution of iron/ Fe o into aqueous media, to generate secondary pollutants) are impending to transfer this technology from laboratory scale to commercial level.…”

An Overview of Surface‐Functionalized Magnetic Nanoparticles: Preparation and Application for Wastewater Treatment

“…Due to the rapid development of industrial and agricultural activities, water pollution has now become a major global environmental concern . Heavy metals and organic pollutants in the wastewater have been creating an alarming environmental issue, due to their acute toxicity and non‐biodegradability, which present a threat to human health when their accumulation in living bodies reaches to a limited amount . Despite their toxicity, the heavy metals and organic matters are also valuable chemicals for industrial productions.…”