Leachates from Solid Wastes: Chemical and Eco(geno)toxicological Differences Between Leachates Obtained from Fresh and Stabilized Industrial Organic Sludge
Overview
Toxicology
Authors
Affiliations
The chemical and ecotoxicological characteristics of fresh and stabilized industrial organic sludge leachates were compared to obtain information regarding how the stabilization process can influence the ecotoxic potential of this industrial waste, which could be used for the amendment of degraded soil. Physicochemical analysis of the sludge leachates, as well as a battery of eco(geno)toxicity tests on bacteria, algae, daphnids, and higher plants (including Vicia faba genotoxicity test) and the determination of hydrolytic enzyme activity, was performed according to standard methods. The chemical comparison of the two types of leachate showed that the samples obtained from stabilized sludge had a lower organic content and higher metal content than leachates of the fresh sludge. The eco(geno)toxicological results obtained with aquatic organisms showed that the stabilized sludge leachate was more toxic than the fresh sludge leachate, both originating from the same industrial organic sludge sample. Nevertheless, phytotoxicity tests carried out with a reference peat soil irrigated with stabilized sludge leachate showed the same toxicity as the fresh sludge leachate. In the case of the industrial solid organic sludge studied, stabilization through a biodegradation process promoted a higher metal mobility/bioavailability/eco(geno)toxicity in the stabilized sludge leachate compared to the fresh sludge leachate.
Chiochetta C, Toumi H, Bohm R, Engel F, Poyer-Radetski G, Rorig L Environ Sci Pollut Res Int. 2017; 24(31):24624-24633.
PMID: 28913724 DOI: 10.1007/s11356-017-0128-6.
Andrade-Vieira L, Palmieri M, Davide L Environ Monit Assess. 2017; 189(10):489.
PMID: 28884393 DOI: 10.1007/s10661-017-6208-8.
Barbafieri M, Giorgetti L Environ Sci Pollut Res Int. 2016; 23(23):24327-24336.
PMID: 27655615 DOI: 10.1007/s11356-016-7653-6.
Chiochetta C, Cotelle S, Masfaraud J, Toumi H, Quaranta G, Adani F Environ Sci Pollut Res Int. 2015; 23(4):3018-25.
PMID: 26341335 DOI: 10.1007/s11356-015-5310-0.