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Title (Primary) Effect of biosolid hydrochar on toxicity to earthworms and brine shrimp
Author Medeiros Melo, T.; Bottlinger, M.; Schulz, E.; Leandro, W.M.; Menezes de Aguiar Filho, A.; Ok, Y.S.; Rinklebe, J.;
Journal Environmental Geochemistry and Health
Year 2017
Department BOOEK;
Volume 39
Issue 6
Language englisch;
POF III (all) T11;
Keywords Sewage sludge; Hydrothermal carbonization; Ecotoxicology
UFZ wide themes RU1
Abstract The hydrothermal carbonization of sewage sludge has been studied as an alternative technique for the conversion of sewage sludge into value-added products, such as soil amendments. We tested the toxicity of biosolid hydrochar (Sewchar) to earthworms. Additionally, the toxicity of Sewchar process water filtrate with and without pH adjustment was assessed, using brine shrimps as a model organism. For a Sewchar application of 40 Mg ha−1, the earthworms significantly preferred the side of the vessel with the reference soil (control) over side of the vessel with the Sewchar treatments. There was no acute toxicity of Sewchar to earthworms within the studied concentration range (up to 80 Mg ha−1). Regarding the Sewchar process water filtrate, the median lethal concentration (LC50) to the shrimps was 8.1% for the treatments in which the pH was not adjusted and 54.8% for the treatments in which the pH was adjusted to 8.5. The lethality to the shrimps significantly increased as the amount of Sewchar process water filtrate increased. In the future, specific toxic substances in Sewchar and its process water filtrate, as well as their interactions with soil properties and their impacts on organisms, should be elucidated. Additionally, it should be identified whether the amount of the toxic compounds satisfies the corresponding legal requirements for the safe application of Sewchar and its process water filtrate.
ID 19673
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=19673
Medeiros Melo, T., Bottlinger, M., Schulz, E., Leandro, W.M., Menezes de Aguiar Filho, A., Ok, Y.S., Rinklebe, J. (2017):
Effect of biosolid hydrochar on toxicity to earthworms and brine shrimp
Environ. Geochem. Health 39 (6), 1351 - 1364