| Title | Sedimentary humic substances in the northern Adriatic sea (Mediterranean sea). |
| Abstract | Humic compounds were determined in sediments collected in an area of the Adriatic sea
receiving fresh waters from the river Po. Sediment cores (10 cm) were sectioned into four layers
which were analysed separately for redox potential (Eh), total phosphorus (TP), total organic
carbon (TOC), humic (HA) and fulvic acid (FA) content. The structure of HA and FA was
also investigated.
The results showed that the TOC and TP content decreased from the coast to the open-sea
stations. Humic and fulvic acid concentrations were also inversely correlated to the distance
from the coast. Moreover, the humic and fulvic acids were closely correlated to the total
organic content and to the total phosphorus content. The correlations found between humic
substances (HS) and TOC and TP, respectively, could be explained both by an in situ formation
due to the high content of nutrients and organic matter, and by a common source of HS,
TOC and TP, namely the River Po discharge.
The predominant presence of aliphatic carbon in the humic structures, the low degree of
substitution and the high nitrogen content suggest that primarily humified compounds were
formed in situ. Nevertheless, the River Po can act both as supplier of organic matter of which
decomposition products lead to the formation of humic compound and as carrier of humified
compounds. |
| Source | Marine environmental research 61 (1), pp. 40–58 |
| Keywords | Humic compoundsSedimentsAdriatic sea |
| Journal | Marine environmental research |
| Editor | Applied Science Publishers,, Barking, Regno Unito |
| Year | 2006 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.marenvres.2005.05.002 |
| Authors | Calace N., Cardellicchio N., Petronio B.M., Pietrantonio M., Pietroletti M. |
| Text | 6381 2006 10.1016/j.marenvres.2005.05.002 ISI Web of Science WOS 000234690100003 Humic compounds Sediments Adriatic sea Sedimentary humic substances in the northern Adriatic sea Mediterranean sea . Calace N., Cardellicchio N., Petronio B.M., Pietrantonio M., Pietroletti M. Department of Chemistry, University of La Sapienza , p.le A Moro 5, 00185 Rome, Italy Istituto Ambiente Marino Costiero, I.A.M.C. CNR, Via Roma, 3 74100 Taranto Italy Humic compounds were determined in sediments collected in an area of the Adriatic sea receiving fresh waters from the river Po. Sediment cores 10 cm were sectioned into four layers which were analysed separately for redox potential Eh , total phosphorus TP , total organic carbon TOC , humic HA and fulvic acid FA content. The structure of HA and FA was also investigated. The results showed that the TOC and TP content decreased from the coast to the open sea stations. Humic and fulvic acid concentrations were also inversely correlated to the distance from the coast. Moreover, the humic and fulvic acids were closely correlated to the total organic content and to the total phosphorus content. The correlations found between humic substances HS and TOC and TP, respectively, could be explained both by an in situ formation due to the high content of nutrients and organic matter, and by a common source of HS, TOC and TP, namely the River Po discharge. The predominant presence of aliphatic carbon in the humic structures, the low degree of substitution and the high nitrogen content suggest that primarily humified compounds were formed in situ. Nevertheless, the River Po can act both as supplier of organic matter of which decomposition products lead to the formation of humic compound and as carrier of humified compounds. 61 Sedimentary Humic Articolo pubblicato Sedimentary_humic.pdf Articolo in rivista Applied Science Publishers, 0141 1136 Marine environmental research Marine environmental research Mar. environ. res. Marine environmental research. Journal of marine environmental research nicola.cardellicchio CARDELLICCHIO NICOLA TA.P04.002.001 Fascia Costiera e Ambienti di Transizione analisi strutturale e funzionale delle componenti biotiche ed abiotiche degli ecosistemi per lo sviluppo sostenibile delle attivita |
