Naslov
Biomass bottom ash & dolomite similarly ameliorate an acidic low-nutrient soil, improve phytonutrition and growth, but increase Cd accumulation in radish

Autori
Ondrašek, Gabrijel ; Kranjčec, Filip ; Filipović, Lana ; Filipović, Vilim ; Bubalo Kovačić, Marina ; Jelovica Badovinac, Ivana ; Peter, Robert ; Petravić, Mladen ; Macan, Jelena ; Rengel, Zed

Izvornik
Science of the total environment (0048-9697) 753 (2021); 141902, 12

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
bio-ash ; solid waste ; Ca-/Mg‑carbonates ; soil chemical amelioration ; Cd immobilisation ; Cd bioavailability

Sažetak
One of negative side-effects of usage of bio- renewables might be generation of mineral (ash) material, potential source of environmental pollution. A hypothesis was that bottom ash (BA ; from biomass cogeneration facility) could be efficiently (re) used in soil chemical conditioning similarly to widely-used dolomite- based soil conditioner (DO ; from Croatian Dinaric-coastal region) which we tested by: i) physicochemical characterisation of BA and DO, and ii) bioassay with Raphanus sativus cultivated in acidic soil amended with BA or DO. Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX) confirmed complex chemical/physical structures and morphology between amendments, X-ray diffraction (XRD) showed their distinctive mineralogy with predominantly dolomite (in DO) vs. quartz and calcite (in BA), while secondary ion mass spectrometry (SIMS) revealed their diverse elemental/isotopic composition. The BA or DO amendments ameliorated soil acidity, increased available P, K and most other nutrients, but not Cd. The BA or DO amendments improved vegetative growth and edible hypocotyl yield. However, both amendments also increased Cd accumulation in all radish tissues, which was unexpected given the alkaline matrix of bio-ash and dolomite that would be likely to facilitate retention and immobilisation of toxic Cd. Thus, thorough characterisation and evaluation of BA- and/or DO-based materials and relevant soils (with an emphasis on metal sorption/immobilisation) prior to application in (agro) ecosystems is crucial for producing food clean of toxic metals.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Poljoprivreda (agronomija), Biotehnologija

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