41. Environmental impacts and immobilization mechanisms of cadmium, lead and zinc in geotechnical composites made from contaminated soil and paper-ashMarija Đurić, Primož Oprčkal, Vesna Zalar Serjun, Alenka Mauko Pranjić, Janez Ščančar, Radmila Milačič, Ana Mladenovič, 2021, original scientific article Abstract: Paper-ash is used for remediation of heavily contaminated soils with metals, but remediation efficiency after longer periods has not been reported. To gain insights into the mechanisms of immobilization of cadmium (Cd), lead (Pb), and znic (Zn), a study was performed in the laboratory experiment in uncontaminated, artificially contaminated, and remediated soils, and these soils treated with sulfate, to mimic conditions in contaminated soil from zinc smelter site. Remediation was performed by mixing contaminated soil with paper-ash to immobilize Cd, Pb, and Zn in the geotechnical composite. Partitioning of Cd, Pb, and Zn was studied over one year in seven-time intervals applying the sequential extraction procedure and complementary X-ray diffraction analyses. This methodological approach enabled us to follow the redistribution of Cd, Pb, and Zn over time, thus, to studying immobilization mechanisms and assessing the remediation efficiency and stability of newly formed mineral phases. Cd, Pb, and Zn were effectively immobilized by precipitation of insoluble hydroxides after the addition of paper-ash and by the carbonization process in insoluble carbonate minerals. After remediation, Cd, Pb, and Zn concentrations in the water-soluble fraction were well below the limiting values for inertness: Cd by 100 times, Pb by 125 times, and Zn by 10 times. Sulfate treatment did not influence the remediation efficiency. Experimental data confirmed the high remediation efficiency and stability of insoluble Cd, Pb, and Zn mineral phases in geotechnical composites.
Keywords: cadmium, lead, zinc, contaminated soil, paper ash, immobilization mechanisms
Published in DiRROS: 04.07.2023; Views: 362; Downloads: 235
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42. Environmental acceptability of geotechnical composites from recycled materials : comparative study of laboratory and field investigationsMarija Đurić, Vesna Zalar Serjun, Ana Mladenovič, Alenka Mauko Pranjić, Radmila Milačič, Janez Ščančar, Janko Urbanc, Nina Mali, Alenka Sešek Pavlin, Janez Turk, Primož Oprčkal, 2023, original scientific article Abstract: The environmental properties of three geotechnical composites made by recycling wastes were investigated on a laboratory scale and in the field with the use of lysimeters designated for the revitalization of degraded mining sites. Composites were prepared by combining the mine waste with paper-mill sludge and foundry sand (Composite 1), with digestate from municipal waste and paper ash (Composite 2), and with coal ash, foundry slag and waste incineration bottom ash (Composite 3). The results of laboratory leaching tests proved that Composites 1 and 3 are envi- ronmentally acceptable, according to the legislative limits, as the potentially hazardous substances were immobilized, while in Composite 2, the legislative limits were exceeded. In the field lysimeters, the lowest rate of leaching was determined for optimally compacted Composites 1 and 3, while for Composite 2 the leaching of Cu was high. This study proved that optimally installed Composites 1 and 3 are environmentally acceptable for use in construction as an alternative to virgin materials, for the revitalization of degraded mining sites or, along with Composite 2, for closure operations with landfills. In this way, locally available waste streams are valorised and channelized into a beneficial and sustainable recycling practice.
Keywords: waste, recycling, lysimeter, potentiali hazardous substances, immobilization, revitalisation, environmental, open access
Published in DiRROS: 29.05.2023; Views: 350; Downloads: 258
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43. Breme kožnega melanoma v Sloveniji in kazalniki kakovosti obravnave : poročilo nacionalnega kliničnega registra kožnega melanoma za obdobje 2017-2021Vesna Zadnik, Katarina Lokar, 2023, published scientific conference contribution Abstract: Na Onkološkem inštitutu Ljubljana smo leta 2018 v okviru Registra raka Republike Slovenije vzpostavili prvi nacionalni onkološki klinični register – klinični register kožnega melanoma. Poleg kazalnikov bremena raka (incidence, prevalence in preživetja), ki jih že 70 let spremljamo v okviru nacionalnega Registra raka, lahko sedaj na populacijski ravni merimo tudi kazalnike kakovosti obravnave bolnikov z melanomov. Kožni melanom sodi med rake, pri katerih incidenca v zadnjih desetletjih najbolj strmo narašča. Število novo zbolelih že presega mejo 600 oseb letno s čimer zavzema kožni melanom 6. mesto med vsemi novo odkritimi raki. Tako po incidenci, kot po umrljivosti je Slovenija zelo visoko na lestvici evropskih držav; po preživetju pa se uvrščamo nad evropsko povprečje. Kazalniki kakovosti obravnave in skladnosti obravnav s smernicami so na voljo za zbolele od leta 2017 naprej. Stroka si je že postavila ciljne vrednosti za vsakega od definiranih kazalnikov - kar nekaj postavljenih ciljev ostaja še pred nami
Keywords: rak kože, melanom, register raka
Published in DiRROS: 16.05.2023; Views: 325; Downloads: 146
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44. Leaching and geochemical modelling of an electric arc furnace (EAF) and ladle slag heapMojca Loncnar, Ana Mladenovič, Vesna Zalar Serjun, Marija Zupančič, Hans A. van der Sloot, 2022, original scientific article Abstract: Old metallurgical dumps across Europe represent a loss of valuable land and a potential threat to the environment, especially to groundwater (GW). The Javornik electric arc furnace (EAF) and ladle slag heap, situated in Slovenia, was investigated in this study. The environmental impact of the slag heap was evaluated by combining leaching characterization tests of landfill samples and geochemical modelling. It was shown that throughout the landfill the same minerals and sorptive phases control the leaching of elements of potential concern, despite variations in chemical composi- tion. Although carbonation of the disposed steel slags occurred (molar ratio CO3/(Ca+Mg) = 0.53) relative to fresh slag, it had a limited effect on the leaching behaviour of elements of potential concern. The leaching from the slag heaps had also a limited effect on the quality of the GW. A site-specific case, however, was that leachates from the slag heap were strongly diluted, since a rapid flow of GW fed from the nearby Sava River was observed in the landfill area. The sampling and testing approach applied provides a basis for assessing the long-term impact of release and is a good starting point for evaluating future management options, including beneficial uses for this type of slag.
Keywords: EAF slag, field verification, geochemical modelling, ladle slag, leaching, release prediction, steel slag heap
Published in DiRROS: 28.04.2023; Views: 389; Downloads: 206
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46. Načrtovano komuniciranje med epidemijo covid-19 kot del aktivnosti, s katerimi smo uspeli ohraniti udeležbo žensk v programu DORA nad 70%Amela Duratović Konjević, Vesna Škrbec, Kristijana Hertl, Katja Jarm, Mateja Kurir-Borovčić, Miloš Vrhovec, Veronika Kutnar, Lucija Kolar, Katarina Torkar, Cveto Šval, 2022, published professional conference contribution abstract Keywords: onkologija, rak dojke, mediji
Published in DiRROS: 03.02.2023; Views: 402; Downloads: 105
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47. Epidemiologija raka prostateVesna Zadnik, 2023, published scientific conference contribution Abstract: Ocenjeno je, da je leta 2020 za rakom prostate na svetu zbolelo več kot 1,4 milijona moških, kar je 14 % vseh zbolelih za rakom. Breme raka prostate, predvsem incidenca, je odvisno od intenzivnosti rabe testa za določanje za prostato specifičnega antigena (PSA) pri zdravih moških v populaciji. Breme raka prostate v Sloveniji je v primerjavi z Evropo nekoliko nad povprečjem. V obdobju 2015−2019 je v Sloveniji povprečno letno za rakom prostate zbolelo 1.676 moških (162,8/100.000), umrlo pa 434 (42,1/100.000). Ob koncu leta 2019 je med nami živelo 15.922 bolnikov, ki jim je bila kdaj v življenju postavljena diagnoza raka prostate. Petletno čisto preživetje slovenskih bolnikov, zbolelih v letih 2012−2016, je bilo 93-%. Kljub številnim epidemiološkim raziskavam zaenkrat še vedno premalo vemo o etiologiji raka prostate. Letos smo v Evropski uniji revidirali dosedanja strokovna dognanja o učinkovitosti uporabe PSA v organiziranem presejanju za raka prostate. Novi dokazi bodo predstavljali osnovo za pripravo priporočil za uvedbo populacijskega presejanja v državah članicah. Do takrat pa odločitev o tem, ali uporabiti ali ne presejalni test PSA pri zdravih, asimptomatskih moških, ostaja odgovornost zdravnika, skupaj z vsemi prednostmi in možnimi zapleti seznanjenega moškega.
Keywords: rak prostate, epidemiologija, register raka
Published in DiRROS: 02.02.2023; Views: 358; Downloads: 105
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48. Odlično zadovoljstvo žensk s programom DORA : rezultati anonimne anketeMateja Kurir-Borovčić, Katja Jarm, Miloš Vrhovec, Veronika Kutnar, Lucija Kolar, Katarina Torkar, Vesna Škrbec, Cveto Šval, Kristijana Hertl, 2022, published professional conference contribution abstract Keywords: onkologija, rak dojke, kemoterapija
Published in DiRROS: 27.01.2023; Views: 394; Downloads: 108
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50. Breme raka glave in vratu ter trendiVesna Zadnik, 2022, published professional conference contribution Abstract: Ocenjeno je, da je leta 2020 za rakom glave in vratu po svetu zbolelo skoraj milijon ljudi, umrlo pa jih je 467.000. V Evropi je največja incidenca in umrljivost na vzhodu celine, Slovenija se po incidenci in umrljivosti raka glave in vratu uvršča v evropsko povprečje. V Sloveniji je v obdobju 2015–2019 za rakom glave in vratu povprečno letno zbolelo 471 oseb, kar je 3 % vseh rakavih bolezni v Sloveniji. Bolezen je pogostejša pri moških, kjer je na petem mestu po pogostosti med vsemi rakavimi obolenji. Breme bolezni s časom pri moških pada, pri ženskah pa stagnira. Pri večini bolnikov raka glave in vratu odkrijemo v starosti od 55 do 70 let, ko se bolezen že razširi v regijske bezgavke. Preživetje bolnikov z rakom glave in vratu se postopno veča – več kot polovica današnjih bolnikov preživi 5 let po diagnozi. Najpomembnejši prognostični dejavnik je stadij ob diagnozi.
Keywords: rak glave in vratu, breme raka, onkologija
Published in DiRROS: 06.01.2023; Views: 348; Downloads: 95
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