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Statements

Subject Item
n2:RIV%2F61989100%3A27360%2F13%3A86086054%21RIV14-MSM-27360___
rdf:type
n9:Vysledek skos:Concept
dcterms:description
A composite magnetic sorbent with a relatively high content of humic substances (above 35% of organic carbon) was prepared by co-precipitation of Fe2+/Fe3+ salts with commercially available alkaline humate concentrate. Magnetite (Fe3O4) was identified as the main crystalline phase bearing the magnetic properties of the sorbent. Scanning electron microscope (SEM) images revealed the presence of uniform sub-micron structures on the surface of the sorbent grains. Due to the presence of humic substances, the sorbent exhibited good sorption ability towards low-polarity organic pollutants, namely chlorophenols. The sorption efficiency increased in the order of 4-mono- < 2,4-di- < 2,4,5-trichlorophenol in accordance with growing hydrophobicity of these compounds, confirming a hydrophobic nature of the interactions involved in the sorption process. Similar trends were found in the desorption study utilizing water and methanol as leachants. Some polycyclic aromatic hydrocarbons (naphthalene, anthracene, phenanthrene, fluoranthene, pyrene) were also retained on the sorbent. The chemical composition as well as the main physical characteristics (surface area, phase composition) of the sorbent remained virtually unchanged during the sorption process. The sorbent retained its magnetic properties during the sorption of organic substances from aqueous solutions, which provides an opportunity for its regeneration. A composite magnetic sorbent with a relatively high content of humic substances (above 35% of organic carbon) was prepared by co-precipitation of Fe2+/Fe3+ salts with commercially available alkaline humate concentrate. Magnetite (Fe3O4) was identified as the main crystalline phase bearing the magnetic properties of the sorbent. Scanning electron microscope (SEM) images revealed the presence of uniform sub-micron structures on the surface of the sorbent grains. Due to the presence of humic substances, the sorbent exhibited good sorption ability towards low-polarity organic pollutants, namely chlorophenols. The sorption efficiency increased in the order of 4-mono- < 2,4-di- < 2,4,5-trichlorophenol in accordance with growing hydrophobicity of these compounds, confirming a hydrophobic nature of the interactions involved in the sorption process. Similar trends were found in the desorption study utilizing water and methanol as leachants. Some polycyclic aromatic hydrocarbons (naphthalene, anthracene, phenanthrene, fluoranthene, pyrene) were also retained on the sorbent. The chemical composition as well as the main physical characteristics (surface area, phase composition) of the sorbent remained virtually unchanged during the sorption process. The sorbent retained its magnetic properties during the sorption of organic substances from aqueous solutions, which provides an opportunity for its regeneration.
dcterms:title
Composite Fe3O4/humic acid magnetic sorbent and its sorption ability for chlorophenols and some other aromatic compounds Composite Fe3O4/humic acid magnetic sorbent and its sorption ability for chlorophenols and some other aromatic compounds
skos:prefLabel
Composite Fe3O4/humic acid magnetic sorbent and its sorption ability for chlorophenols and some other aromatic compounds Composite Fe3O4/humic acid magnetic sorbent and its sorption ability for chlorophenols and some other aromatic compounds
skos:notation
RIV/61989100:27360/13:86086054!RIV14-MSM-27360___
n9:predkladatel
n17:orjk%3A27360
n4:aktivita
n16:P
n4:aktivity
P(ED0040/01/01), P(KAN400720701)
n4:cisloPeriodika
13
n4:dodaniDat
n11:2014
n4:domaciTvurceVysledku
n18:9219269
n4:druhVysledku
n15:J
n4:duvernostUdaju
n19:S
n4:entitaPredkladatele
n10:predkladatel
n4:idSjednocenehoVysledku
66505
n4:idVysledku
RIV/61989100:27360/13:86086054
n4:jazykVysledku
n13:eng
n4:klicovaSlova
sorption of chlorophenols; PAHs; magnetite; magnetic sorbent; humate-based sorbent
n4:klicoveSlovo
n6:magnetic%20sorbent n6:humate-based%20sorbent n6:magnetite n6:PAHs n6:sorption%20of%20chlorophenols
n4:kodStatuVydavatele
US - Spojené státy americké
n4:kontrolniKodProRIV
[24286F7BFE44]
n4:nazevZdroje
Separation Science and Technology
n4:obor
n20:CB
n4:pocetDomacichTvurcuVysledku
1
n4:pocetTvurcuVysledku
4
n4:projekt
n5:ED0040%2F01%2F01 n5:KAN400720701
n4:rokUplatneniVysledku
n11:2013
n4:svazekPeriodika
48
n4:tvurceVysledku
Pilařová, Věra Životský, Ondřej Janoš, Pavel Kormunda, Martin
n4:wos
000322867500014
s:issn
0149-6395
s:numberOfPages
8
n12:doi
10.1080/01496395.2013.791317
n14:organizacniJednotka
27360