Lignin Microspheres Modified with Magnetite Nanoparticles as a Selenate Highly Porous Adsorbent

Highly porous lignin-based microspheres, modified by magnetite nanoparticles, were used for the first time for the removal of selenate anions, Se(VI), from spiked and real water samples. The influence of experimental conditions: selenate concentration, adsorbent dosage and contact time on the adsorp...

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Published in:International journal of molecular sciences 2022-11, Vol.23 (22), p.13872
Main Authors: Marjanovic, Vesna, Markovic, Radmila, Steharnik, Mirjana, Dimitrijevic, Silvana, Marinkovic, Aleksandar D, Peric-Grujic, Aleksandra, Đolic, Maja
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Anions
Biomass
Coal-fired power plants
Desorption
Drinking Water
Efficiency
Hydrogen-Ion Concentration
Lignin
Magnetite
Magnetite Nanoparticles - chemistry
Microspheres
Nanoparticles
Natural polymers
Porosity
Selenic Acid
Selenium
Sodium hydroxide
Sorbents
Vibration
Water Pollutants, Chemical - chemistry
Water Purification - methods
Water sampling
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creator Marjanovic, Vesna
Markovic, Radmila
Steharnik, Mirjana
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Marinkovic, Aleksandar D
Peric-Grujic, Aleksandra
Đolic, Maja
description Highly porous lignin-based microspheres, modified by magnetite nanoparticles, were used for the first time for the removal of selenate anions, Se(VI), from spiked and real water samples. The influence of experimental conditions: selenate concentration, adsorbent dosage and contact time on the adsorption capacity was investigated in a batch experimental mode. The FTIR, XRD, SEM techniques were used to analyze the structural and morphological properties of the native and exhausted adsorbent. The maximum adsorption capacity was found to be 69.9 mg/g for Se(VI) anions at pH 6.46 from the simulated water samples. The modified natural polymer was efficient in Se(VI) removal from the real (potable) water samples, originated from six cities in the Republic of Serbia, with an overage efficacy of 20%. The regeneration capacity of 61% in one cycle of desorption (0.5 M NaOH as desorption solution) of bio-based adsorbent was gained in this investigation. The examined material demonstrated a significant affinity for Se(VI) oxyanion, but a low potential for multi-cycle material application; consequently, the loaded sorbent could be proposed to be used as a Se fertilizer.
doi_str_mv 10.3390/ijms232213872
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subjects Adsorbents
Adsorption
Anions
Biomass
Coal-fired power plants
Desorption
Drinking Water
Efficiency
Hydrogen-Ion Concentration
Lignin
Magnetite
Magnetite Nanoparticles - chemistry
Microspheres
Nanoparticles
Natural polymers
Porosity
Selenic Acid
Selenium
Sodium hydroxide
Sorbents
Vibration
Water Pollutants, Chemical - chemistry
Water Purification - methods
Water sampling
title Lignin Microspheres Modified with Magnetite Nanoparticles as a Selenate Highly Porous Adsorbent
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