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Statements

Subject Item
n2:RIV%2F00216208%3A11310%2F14%3A10281203%21RIV15-MSM-11310___
rdf:type
n18:Vysledek skos:Concept
rdfs:seeAlso
http://dx.doi.org/10.1016/j.geoderma.2013.10.011
dcterms:description
Manganese oxides are known to be efficient sorbents in soils, and thus potentially useful in soil remediation. A novel synthetic amorphous manganese oxide (AMO) was prepared using the first step of the procedure generally used for birnessite synthesis (i.e., omitting the heating step of the gel). Its long-term (90 day) stability was evaluated using a pot experiment in contrasting soil samples (pH 42, 5.4, and 73). Up to 113 mg Mn l(-1) was released into pore water at the beginning of the experiment in more acidic soils, indicating a partial dissolution/alteration of AMO surfaces. Manganese release into the pore water stabilized after 15 days, in agreement with the mass loss measurements. Mass loss decreased again after 60 days of incubation for the neutral soil due to the massive formation of secondary rhodochrosite (MnCO3) and/or kutnahorite [(Ca,Mn)CO3] detected on the AMO surfaces by both X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). Mineralogical transformations and aggregation of fine-grained AMO particles probably lead to the decrease of binding surfaces. Despite the fact that 10-18% of AMO dissolved during the 90 days of the experiment, the sorbent was found to be relatively stable, primarily in near-neutral soils; consequently, its in situ applications to polluted soils need to be evaluated further. Manganese oxides are known to be efficient sorbents in soils, and thus potentially useful in soil remediation. A novel synthetic amorphous manganese oxide (AMO) was prepared using the first step of the procedure generally used for birnessite synthesis (i.e., omitting the heating step of the gel). Its long-term (90 day) stability was evaluated using a pot experiment in contrasting soil samples (pH 42, 5.4, and 73). Up to 113 mg Mn l(-1) was released into pore water at the beginning of the experiment in more acidic soils, indicating a partial dissolution/alteration of AMO surfaces. Manganese release into the pore water stabilized after 15 days, in agreement with the mass loss measurements. Mass loss decreased again after 60 days of incubation for the neutral soil due to the massive formation of secondary rhodochrosite (MnCO3) and/or kutnahorite [(Ca,Mn)CO3] detected on the AMO surfaces by both X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). Mineralogical transformations and aggregation of fine-grained AMO particles probably lead to the decrease of binding surfaces. Despite the fact that 10-18% of AMO dissolved during the 90 days of the experiment, the sorbent was found to be relatively stable, primarily in near-neutral soils; consequently, its in situ applications to polluted soils need to be evaluated further.
dcterms:title
Stability of a novel synthetic amorphous manganese oxide in contrasting soils Stability of a novel synthetic amorphous manganese oxide in contrasting soils
skos:prefLabel
Stability of a novel synthetic amorphous manganese oxide in contrasting soils Stability of a novel synthetic amorphous manganese oxide in contrasting soils
skos:notation
RIV/00216208:11310/14:10281203!RIV15-MSM-11310___
n3:aktivita
n5:Z n5:P n5:I
n3:aktivity
I, P(GAP503/11/0840), Z(MSM0021620855)
n3:cisloPeriodika
FEBRUARY
n3:dodaniDat
n4:2015
n3:domaciTvurceVysledku
n7:9364129 n7:4580893 n7:3798364 n7:6411061
n3:druhVysledku
n10:J
n3:duvernostUdaju
n19:S
n3:entitaPredkladatele
n21:predkladatel
n3:idSjednocenehoVysledku
46944
n3:idVysledku
RIV/00216208:11310/14:10281203
n3:jazykVysledku
n12:eng
n3:klicovaSlova
Pollution; Chemical stabilization; Soils; Stability; Amorphous manganese oxide
n3:klicoveSlovo
n14:Soils n14:Pollution n14:Amorphous%20manganese%20oxide n14:Chemical%20stabilization n14:Stability
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[21055E887F33]
n3:nazevZdroje
Geoderma
n3:obor
n9:CA
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
8
n3:projekt
n6:GAP503%2F11%2F0840
n3:rokUplatneniVysledku
n4:2014
n3:svazekPeriodika
214
n3:tvurceVysledku
Šebek, Ondřej Della Puppa, Loic Knytl, Vladislav Komárek, Michael Mihaljevič, Martin Klementová, Mariana Bordas, Francois Ettler, Vojtěch
n3:wos
000328807400002
n3:zamer
n16:MSM0021620855
s:issn
0016-7061
s:numberOfPages
8
n13:doi
10.1016/j.geoderma.2013.10.011
n17:organizacniJednotka
11310