RT Journal Article
T1 Developing a Compost Quality Index (CQI) Based on the Electrochemical Quantification of Cd (HA) Reactivity
T2 Compost Quality Index
A1 Silva, Ana C.
A1 Rocha, Pedro
A1 Geraldo, Dulce
A1 Cunha, Ana
A1 Antelo Cortizas, Juan Manuel
A1 Pinheiro, José P.
A1 Fiol López, Sarah
A1 Bento, Fátima
K1 AGNES
K1 Cadmium
K1 Compost
K1 Humic substances
K1 Metal binding
K1 Quality index
AB The present work demonstrates the use of Cd2+ as a reactivity probe of the fulvic acids (FAs), humic acids (HAs) and dissolved organic matter (DOM) compost extracts. Significant differences were observed between the extracts, with the HA extract showing the highest reactivity. Comparing the different composts, the largest reactivity variation was again observed for HA then FA and finally DOM extracts. The Cd2+ binding extent was used to calculate the quality of composts and compared with a reference of uncomposted organic fertiliser (FLW), leading to the definition of an operational scale of compost quality. The parameter equivalent mass of fertiliser (mEF) was used for this scale sorted the seven composts from 0.353 to 1.09 kg FLW, for compost of sewage sludge (CSS) and vermicompost of domestic waste (CVDW), respectively. The significance of this parameter was verified through a correlation analysis between binding extent and the effect of compost application on lettuce crop growth in a field trial. The results demonstrate the potentiality of FA and HA extracts as markers of compost bioactivity and the use of Cd2+ as a reactivity probe.
PB MDPI
SN 14203049
YR 2023
FD 2023
LK https://hdl.handle.net/10347/40928
UL https://hdl.handle.net/10347/40928
LA eng
NO Silva, Ana C.; Rocha, Pedro; Gerando, Dulce; Cunha, Ana; Antelo, Juan; Pinheiro, José P.; Fiol, Sarah; Bento, Fátima (2023). "Developing a compost quality index (CQI) based on the electrochemical quantification of Cd(HA) reactivity". Molecules, 28(3), 1503
NO Interreg VA Spain-Portugal Programme (EU) through the project Res2ValHum (0366_RES2VALHUM_1_P)
NO Operational Programme Norte 2020 (NORTE-08-5369-FSE-000033): PhD grant UMINHO/BD/40/2016
NO Xunta de Galicia—Consellería de Educación e Ordenación Universitaria de Galicia (Consolidation of Competitive Groups of Research; GI-1245, ED431C 2022/40)
DS Minerva
RD 24 abr 2026