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Removal of toxic metals from sewage sludge by EDTA and hydrodynamic cavitation and use of the sludge as fertilizer
ID
Morales Arteaga, Juan Francisco
(
Avtor
),
ID
Vodnik, Dominik
(
Avtor
),
ID
Kastelec, Damijana
(
Avtor
),
ID
Zupanc, Mojca
(
Avtor
),
ID
Dular, Matevž
(
Avtor
),
ID
Ortar, Jernej
(
Avtor
),
ID
Đurić, Marija
(
Avtor
),
ID
Kaurin, Anela
(
Avtor
),
ID
Mihelič, Rok
(
Avtor
),
ID
Leštan, Domen
(
Avtor
)
PDF - Predstavitvena datoteka,
prenos
(2,48 MB)
MD5: 883001BBA8FAED1F236D6F4571544C7F
URL - Izvorni URL, za dostop obiščite
https://www.sciencedirect.com/science/article/pii/S0048969724015857
Galerija slik
Izvleček
Sewage sludge (SS) is rich in plant nutrients, including P, N, and organic C, but often contains toxic metals (TMs), which hinders its potential use in agriculture. The efficiency of removal of TMs by washing with ethylenediamine tetraacetate (EDTA), in combination with hydrodynamic cavitation (HC) and the usability of washed sewage sludge as fertilizer were investigated. The environmental risk was assessed. During 8 wash batches an average 35, 68, 47 and 45 % of Pb, Zn, Cd and Cu, respectively, as well as 22 and 5 % Mn and Fe were removed from the SS. The process solutions and EDTA were recycled at a pH gradient of 12.5–2, which was achieved by adding quicklime (CaO) and then acidification by H$_2$SO$_4$, so that no wastewater was produced, only solid waste (ReSoil® method). The quality of the recycled process solutions (they remained unsaturated with salts) and the efficiency of the washing process were maintained across all batches. On average, 46 % of the EDTA was lost during the process and was replenished. The initial leachability of EDTA-mobilized Pb, Zn, Cu, Cr and Fe remaining in the washed SS increased 6-, 17-, 3-, 11- and 11-fold, respectively, but not to hazardous levels except for Zn. After washing, P and K remained in the SS, plant-available P increased 3.3-fold, while total N and C were reduced by 20.28 and 2.44 %, respectively. Washed SS was used as fertilizer in the pot experiment. The yield of Brassica juncea did not improve, the uptake of TMs by the plants and the leaching of TMs from the soil were minimal. Our study highlighted the drawbacks and potential feasibility of the new SS washing method.
Jezik:
Angleški jezik
Ključne besede:
sewage sludge
,
toxic metals
,
EDTA
,
hydrodynamic cavitation
,
ReSoil®
,
soil fertilization
,
phosphorus
Vrsta gradiva:
Članek v reviji
Tipologija:
1.01 - Izvirni znanstveni članek
Organizacija:
BF - Biotehniška fakulteta
FS - Fakulteta za strojništvo
Status publikacije:
Objavljeno
Različica publikacije:
Objavljena publikacija
Leto izida:
2024
Št. strani:
10 str.
Številčenje:
Vol. 923, art. 171444
PID:
20.500.12556/RUL-154965
UDK:
631.4
ISSN pri članku:
0048-9697
DOI:
10.1016/j.scitotenv.2024.171444
COBISS.SI-ID:
188503043
Datum objave v RUL:
12.03.2024
Število ogledov:
541
Število prenosov:
193
Metapodatki:
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Objavi na:
Gradivo je del revije
Naslov:
Science of the total environment
Skrajšan naslov:
Sci. total environ.
Založnik:
Elsevier
ISSN:
0048-9697
COBISS.SI-ID:
26369024
Licence
Licenca:
CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:
http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:
To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Sekundarni jezik
Jezik:
Slovenski jezik
Ključne besede:
blato iz čistilnih naprav
,
toksične snovi
,
toksične kovine
,
hidrodinamična kavitacija
,
čiščenje blata
,
gnojilo
Projekti
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
J7-2601
Naslov:
Metoda dekontaminacije aktivnih blat in njihovih produktov za njihovo trajnostno uporabo kot fosfatna gnojila
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
P4-0085
Naslov:
Agroekosistemi
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