Naslov
The suitability of sewage sludge for soil amendment in relation to its metal and radionuclide levels

Autori
Černe, Marko ; Palčić, Igor ; Pasković, Igor ; Major, Nikola ; Romić, Marija ; Igrc, Marina Diana ; Perčin, Aleksandra ; Goreta Ban, Smiljana ; Zorko, Benjamin ; Vodenik, Branko ; Glavič Cindro, Denis ; Ban, Dean

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
13th CONGRESS OF THE CROATIAN SOCIETY OF SOIL SCIENCE-Utilizing potential of soil and land resources: Key roles of science and effective policy, 10 – 14 September 2018, VUKOVAR, CROATIA, Zbornik sažetaka = Book of Abstracts / Romić, Marija ; Rastija, Domagoj ; Popović, Brigita - Zagreb : Hrvatsko tloznanstveno društvo, 2018, 7-7

ISBN
978-953-7878-85-6

Skup
13. kongres Hrvatskog tloznanstvenog društva

Mjesto i datum
Vukovar, Hrvatska, 10.09.2018. - 14.09.2018

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
soil amendment, sewage sludge, macronutrients, metals, radionuclides

Sažetak
The aim of this study was to evaluate the suitability of sewage sludge for soil amendment in relation to its metal and radionuclide levels. The macronutrients were assayed as they may affect the retention of contaminants by sludge biomass. In the dewatered sewage sludge, the contents of total N, P and K were determined using the ISO recommended procedures. Concentrations of total Cd, Ni, Zn were measured using the ICP-OES, while 238U and 226Ra by gamma-ray spectrometry. The results showed that N contents ranging from 0.4–7.7%, while the amounts of P and K were within the limits from 3.2–36.1 and 0.8–4.7 g kg-1 d.w., respectively. Concentrations of Cd, Ni and Zn varied from 0.3–1.3, 7.9–52.6 and 95.7–1254.0 mg kg-1 d.w., respectively, which is below the threshold limits according to Croatia's legislative on sewage sludge agricultural use. Concentrations of 238U and 226Ra, which ranged from 8.7–59.1, and 3.2–44.5 Bq kg-1 d.w., respectively, are in the area of a natural background. Furthermore, the correlations between the N and Cd (r = 0.755) and P and 238U (r = 0.668) indicate that macronutrient compounds may be involved in adsorption of metal contaminants by municipal sludge. According to obtained results it seems that studied municipal bio-solids may be applied to soil considering the legislative-based recommendation. Soil conditioning with sewage sludge may be a promising strategy for nutrient recycling from municipal waste.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA