Laboratório de Remediação Ambiental, Universidade do Vale do Itajaí, Rua Uruguai, 458, Itajaí, SC, 88302-202, Brazil.
Environ Sci Pollut Res Int. 2014 Jan;21(2):1090-8. doi: 10.1007/s11356-013-1979-0. Epub 2013 Jul 20.
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.
比较了新鲜和稳定化工业有机污泥浸出液的化学和生态毒理学特性，以了解稳定化过程如何影响这种工业废物的生态毒性潜力，这可用于改良退化土壤。根据标准方法对污泥浸出液进行了理化分析，以及一系列针对细菌、藻类、水蚤和高等植物（包括蚕豆遗传毒性测试）的生态（遗传）毒性测试，以及水解酶活性的测定。两种浸出液的化学比较表明，与新鲜污泥浸出液相比，稳定化污泥浸出液的有机含量更低，金属含量更高。用水生生物获得的生态（遗传）毒性结果表明，稳定化污泥浸出液比新鲜污泥浸出液毒性更大，而这两种浸出液均来自同一工业有机污泥样品。然而，用稳定化污泥浸出液灌溉的参考泥炭土进行的植物毒性测试表明，其毒性与新鲜污泥浸出液相同。在研究的工业固体有机污泥的情况下，通过生物降解过程进行稳定化处理会使稳定化污泥浸出液中的金属迁移性/生物利用度/生态（遗传）毒性比新鲜污泥浸出液更高。
