Magnetic carnosine-based metal-organic framework nanoparticles: fabrication, characterization and application as arsenic
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RESEARCH ARTICLE
Magnetic carnosine-based metal-organic framework nanoparticles: fabrication, characterization and application as arsenic adsorbent Maryam Keykhaee 1 & Maryam Razaghi 2 & Arash Dalvand 3 & Fatemeh Salehian 1 & Hamed Soleimani 4 & Alireza Samzadeh-Kermani 5 & Hamid Reza Shamsollahi 4 & Alireza Foroumadi 1 & Ali Ramazani 2 & Mehdi Khoobi 1 Mahmood Alimohammadi 4
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Received: 30 December 2019 / Accepted: 7 September 2020 # Springer Nature Switzerland AG 2020
Abstract This study centers on the controllable synthesis, characterization, and application of a novel magnetic bio-metal-organic framework (Bio-MOF) for the adsorption and subsequent removal of arsenic from aqueous solutions. Zinc ions and carnosine (Car) were exploited to construct the Car-based MOF on the surface of magnetite (Fe3O4 NPs). The Magnetite precoating with Car led to an increase in the yield and the uniform formation of the magnetic MOF. The prepared magnetic Bio-MOF nanoparticles (Fe3O4-Car-MOF NPs) had semi-spherical shape with the size in the range of 35–77 nm, and the crystalline pattern of both magnetite and Car-based MOF. The NPs were employed as an adsorbent for arsenic (As) removal. The adsorption analyses revealed that all studied independent variables including pH, adsorbent dose, and initial arsenic concentration had a significant effect on the arsenic adsorption, and the adsorption data were well matched to the quadratic model. The predicted adsorption values were close to the experimental values confirming the validity of the suggested model. Furthermore, adsorbent dose and pH had a positive effect on arsenic removal, whereas arsenic concentration had a negative effect. The adsorption isotherm and kinetic studies both revealed that As adsorption fitted best to the Freundlich isotherm model. The maximum monolayer adsorption capacity (94.33 mg/g) was achieved at room temperature, pH of 8.5 and adsorbent dose of 0.4 g/L. Finally, the results demonstrated that the adsorbent could be efficiently applied for arsenic removal from aqueous environment. Keywords Peptide-based metal-organic framework . Magnetic nanoparticles . Carnosine . Arsenic removal . Quadratic model
Introduction With the rapid development of industrialization, inorganic pollutants such as heavy metal ions from wastewater, even at a small scale, have been a serious threat to human health and the ecological systems [43]. One of the most deleterious
and toxic heavy metals found in water is Arsenic (As). It is a poisoning element that is introduced as class I carcinogen for human by the international agency for research on cancer (IARC) [13, 18]. Naturally occurring arsenic in rocks and industrial arsenic contained in pesticides are the main sources of water contamination. Because of its carcinogenic character
Authors “Maryam Keykhaee and Maryam Razaghi” have the same contribution to this paper. * Mehdi Khoobi [email protected]
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Environmental Science and Technology Research Center, Department of Environmental Health Engineering, School of Public Healt
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