Letno poročilo 2005

storitve za neposredne industrijske in druge
partnerje, kar vklju~uje razvoj in izbolj{ave
metod ter analize vseh vrst vzorcev (okoljski,
industrijski, biolo{ki) in dolo~evanje prakti~no
vseh elementov periodnega sistema kot tudi
mnogih anorganskih in organskih ionov ter
drugih zvrsti.
Ve~ informacij na na{i spletni strani: http://
www.ki.si/slo/Organiziranost/L04/index.html
BIBLIOGRAFIJA
15 izvirnih znanstvenih ~lankov
2 intervjuja
1 drugi ~lanek ali sestavek
9 objavljenih znanstvenih prispevkov na
konferencah
32 objavljenih povzetkov znanstvenih
prispevkov na konferencah
1 predavanje na tuji univerzi
2 kon~ni poro~ili o rezultatih raziskav
8 elaboratov, pred{tudij, {tudij
GLAVNI DOSE@KI V LETU 2005
- V okviru bilateralnega sodelovanja s prof.
Glassom iz Velike Britanije in sodelavci iz
Politehnike Nova Gorica smo izvedli {tudijo,
v kateri smo uporabili metodi XANES in
EXAFS, da bi pridobili informacijo o molekularni
obliki arzena v vzorcih odpadkov iz
kalcinacije arzenove rude v neposredni bli`ini
`galnih pe~i v Cornwallu in s tem povezano
potencialno nevarnost za okolje. Dokazali
smo, da je mobilnost arzena veliko ve~ja kot
se je doslej domnevalo, saj medatomske
razdalje med As-Fe in As-Al ter koordinacijska
{tevila ka`ejo, da je arzenat v prsti s teh
odlagali{~ prisoten tako v obliki amorfnih ali
slabo kristaliziranih `elezovih hidroksidov
(najverjetneje FeAsO ) kot tudi adsorbiran na
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aluminijeve okside in/ali hidrokside ter
alumosilikate kot je npr. glina.
- Razvili smo teoreti~ni model za izra~un
maksimalne ekstraktibilnosti kovin iz prsti ali
sedimentov za dolo~eno raztopino (ekstraktant),
ki je osnovan na predpostavki veljavnosti
Langmuirjeve izoterme. Uporabnost
Laboratorij za analizno kemijo
Analytical Chemistry Laboratory
emphasis on development and adaptation of
methods and analysis of all kind of samples (environmental,
industrial, biological) and determination
of practically all elements of the periodic
table as well as many inorganic and organic
ions.
More information is available at: http://
www.ki.si/Eng/departments/L04/index.html
BIBLIOGRAPHY
15 Original Scientific Articles
2 Interviews
1 Other Article or Component Part
9 Published Scientific Conference Contributions
32 Published Scientific Conference Contribution
Abstracts
1 Invited Lecture at Foreign University
2 Final Research Reports
8 Treatises, Preliminary Studies, Studies
IMPORTANT ACHIEVEMENTS IN 2005
- In the framework of a bilateral cooperation
with Prof. Glass (UK) and in collaboration
with Nova Gorica Polytechnic, the x-ray absorption
spectroscopic methods XANES and
EXAFS were used to retrieve arsenic molecular
information in the soil from a calciner’s
residue dump (Cornwall, UK) to get insight
in the normally assumed relative safety of
such dump sites. It could be proven that the
mobility of arsenic may be much higher than
expected based on As-Fe and As-Al distances
and coordination numbers which strongly
suggest that arsenate in the soil is present in
two forms, viz. as amorphous or poorly crystalline
hydrous oxides of Fe (most likely
FeAsO ) and adsorbed on aluminium (hydr)o-
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xides or aluminosilicates such as clay.
- A theoretical model was developed for retrieval
of the maximal extractability of metals
from soil or sediment for a user-defined
extractant, based on assumption of a
Langmuir isotherm. The applicability of the
model was illustrated by determining the
chemical availability of seven metals in NIST
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