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2022, vol. 63, br. 2, str. 122-127
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Upotreba fluorescencije indukovane laserskim zračenjem (LIF) kao metode u Sjedinjenim Američkim Državama
Use of laser-induced fluorescence method in characterization of the site contaminated by petroleum hydrocarbons in United States
aHull & Associates Inc, Emerald Parkway, Dublin, Ohio, United States bUniverzitet u Beogradu, Šumarski fakultet, Odsek za ekološki inženjering u zaštiti zemljišnih i vodnih resursa
e-adresa: nenad.maric@sfb.bg.ac.rs
Projekat: This research was supported by the Science Fund of the Republic of Serbia, Program DIASPORA, #Grant No. 6455306, GRACE.
Sažetak
Prostorna karakterizacija zagađenja je ključna komponenta bilo kog remedijacionog pristupa. U poređenju sa konvencionalnim metodama istraživanja, fluorescencija indukovana laserskim zracenjem (LIF) je brža i omogućava trenutnu detekciju naftnog zagađenja. Ovo istraživanje je izvedeno na industrijskoj lokaciji zagađenoj naftnim ugljovodonicima u Pensilvaniji, SAD. Prisustvo "lake" faze zagađenja (LNAPL - dizel) je potvrđeno u 6 od 17 bušotina, lociranih duž rova u kojem je cev za odvod kišnice, sa intenzitetom LIF signala u rasponu između 45% i 225% (procenat referentnog emitera). LIF sistem je omogućio precizno definisanje dubine LNAPL faze omogućivši uvid u protostorni raspored zagađenja. Rezultati su ukazali da ne postoji značajan "rezervoar" LNAPL duž ispitivanog profila, isključivši mogućnost da pomenuti rov za odvod kišnice predstavlja glavni pravac migracije zagađenja. Sveukupno, dobijeni rezultati doprineli su karakterizaciji i remedijaciji ove industrijske lokacije.
Abstract
Spatial characterization of the contamination is a fundamental component of any remediation approach. Compared to conventional investigation methods, the laser-induced fluorescence (LIF) is a faster screening tool and provides the detection of hydrocarbon contamination in real-time. This investigation was conducted at a hydrocarbon-contaminated site in Pennsylvania, US. The presence of light nonaqueous-phase liquids (LNAPL) was detected in 6 of 17 LIF borings, with the reference emitter responses ranging between 45% and 225%. The depth of the response was highly accurate and valuable and provided insight into the spatial distribution of contamination. The results indicated that no substantial amount of LNAPL existed along the LIF borings profile, thus excluding this area as a preferential LNAPL migration pathway. The obtained results contributed to the characterization and remediation of this industrial site.
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