1. New insight into the measurements of particle-bound metals in the urban and remote atmospheres of the Sarajevo canton and modeled impacts of particulate air pollution in Bosnia and HerzegovinaSabina Žero, Silva Žužul, Jasna Huremović, Gordana Pehnec, Ivan Bešlić, Jasmina Rinkovec, Ranka Godec, Noah Kittner, Griša Močnik, Katja Džepina, 2022, izvirni znanstveni članek Ključne besede: Sarajevo, BiH, aerosol, ETAAS, ICP-MS, BenMAP, ExternE, SAFICA Objavljeno v RUNG: 03.03.2022; Ogledov: 1582; Prenosov: 0 Gradivo ima več datotek! Več... |
2. Carcinogenic organic content of particulate matter at urban locations with different pollution sourcesGordana Pehnec, Ivana Jakovljević, Ranka Godec, Zdravka Sever Štrukil, Sabina Žero, Jasna Huremović, Katja Džepina, 2020, izvirni znanstveni članek Opis: Polycyclic aromatic hydrocarbons (PAHs) are compounds known for their adverse effects on human health. Many of them are proven carcinogens, especially those with 5 and 6 aromatic rings, which under normal tropospheric conditions are found in the particle-phase. Benzo(a)pyrene (BaP) is often measured as their general representative. Sarajevo, the capital of Bosnia and Herzegovina, is among the European cities with the poorest air quality. However, in Sarajevo PAHs are neither routinely measured within the air quality monitoring network nor have been a subject of extended, continuous field studies during the most polluted cold periods of the year. The capital of Croatia, Zagreb, is located approximately 300 km air distance north-west from Sarajevo.
PAH mass concentrations in Zagreb have been measured continuously since 1994 within air quality monitoring networks. During winter 2017/2018, the SAFICA project (Sarajevo Canton Winter Field Campaign 2018) was carried out in order to characterize the chemical composition of organic and inorganic aerosol in the Sarajevo Canton. This paper presents the results of PAH measurements in the cities of Sarajevo and Zagreb at one urban
location per city. Daily (24 h), continuous samples of PM10 (particulate matter with aerodynamic diameters
≤10 μm) were collected during heating season, from December 27, 2017 to February 27, 2018. Mass concentrations of eleven particle-phase PAHs in Sarajevo and Zagreb from filter samples collected during the same period were compared. The average BaP ambient mass concentrations in Sarajevo and Zagreb were 6.93 ng m−3 and 3.11 ng m−3, respectively. The contribution of BaP to the total PAH mass concentration was similar at both locations (11%). However, much higher contributions of particle-phase fluoranthene and pyrene were found in Sarajevo. Contributions of individual PAH, diagnostic ratios and factor analysis indicate that combustion of gasoline and diesel from vehicle traffic are a potential source of PAHs at both locations, as well as combustion of other liquid fossil fuels (petroleum and fuel oil). Wood burning was occasionally indicated as a PAH emission source in
Zagreb, while in Sarajevo the contribution of PAHs from wood and coal combustion was more evident. Calculated value for total carcinogenic potency (TCP) of PAHs, which was estimated using toxic equivalence factors from the literature, in PM10 samples collected in Sarajevo was more than twice higher than in Zagreb (10.6 ng m−3 and 4.7 ng m−3, respectively). BaP had the highest contribution to the TCP at both locations (69 and 67%). Ključne besede: carcinogenic potency, diagnostic ratio, factor analysis, PM10, polycyclic aromatic hydrocarbons Objavljeno v RUNG: 09.04.2021; Ogledov: 2172; Prenosov: 0 Gradivo ima več datotek! Več... |
3. Anaerobna obrada industrijskih otpadnih voda iz prehrambene industrije: opravdanost i iskustvaMario Panjicko, Gregor Drago Zupančič, Gordana Šelo, Mladen Franjo, 2016, objavljeni znanstveni prispevek na konferenci Opis: U radu je prikazana opravdanost primjene anaerobne obrade otpadnih voda iz prehrambene industrije na primjeru pivarske i mljekarske industrije. Otpadne vode prehrambene industrije većinom se ispuštaju u javni kanalizacijski sustav ili obrađuju aerobnim biološkim metodama. Porastom cijena energije i popularizacijom obnovljivih izvora, sve se više razmatra anaerobna obrada otpadnih voda prehrambene industrije, obzirom na visok sadržaj organskih tvari u njima. Te vode u pravilu imaju visoko organsko opterećenje (vrijednosti kemijske potrošnje kisika (KPK) otpadne vode pivarske industrije se kreću od 2500-4000 mg/L, a mljekarske industrije od 1500-3000 mg/L), koje je primjenom anaerobne obrade moguće sniziti do 90 %. Tako obrađene vode su, prema KPK vrijednostima, sličnije komunalnim otpadnim vodama te stoga i prihvatljivije za ispuštanje u javni kanalizacijski sustav. Uz snižavanje vrijednosti KPK, anaerobnom obradom proizvodi se bioplin, čijim je iskorištavanjem moguće supstituirati do 20 % prirodnog plina koji se koristi u proizvodnom procesu. Također, otpadnoj vodi moguće je dodavati i drugi tekući otpad (npr. kvasac, sirutka, proizvodi s isteklim rokom trajanja), koji može dodatno povećati proizvodnju bioplina do 60 %, bez negativnih posljedica na provedbu procesa. Uzimajući u obzir snižavanje pristojbi na otpadne vode i smanjenje potrošnje prirodnog plina, period povrata investicije u ovakve sustave iznosi od 3 do 5 godina što njihovu primjenu čini ekonomski opravdanom. Ključne besede: anaerobna digestija, bioplin, energetska oporaba, otpadna voda Objavljeno v RUNG: 08.11.2016; Ogledov: 5529; Prenosov: 0 Gradivo ima več datotek! Več... |