NDLI: Influence of the properties of tropical soils in the toxicity and bioavailability of heavy metals in sewage sludge-amended lands

Content Provider	Springer Nature Link
Author	Cesar, Ricardo Silva, Marianna Colonese, Juan Bidone, Edison Egler, Silvia Castilhos, Zuleica Polivanov, Helena
Copyright Year	2011
Abstract	The toxicity and potential bioavailability of heavy metals were studied in sewage sludge-amended ferralsols and chernosols, using bioassays with earthworms (Eisenia andrei). Acute toxicity tests and avoidance assays were performed according to standard protocols. Potentially bioavailable concentrations of heavy metals were estimated by quantifying their concentrations in tissues of survival earthworms. The results revealed that soil properties played an important role in the toxicity and bioavailability of heavy metals. In this respect, higher levels of toxicity were detected for the ferralsol. The abundance of 2:1 clay minerals, high fertility and more basic values of pH seem to be very important in the reduction of toxicity levels for earthworms. Organisms exposed to the chernosols were able to uptake higher amount of metals. In that case, higher contents of nutrients in chernosols may have influenced such bioavailability processes. Avoidance responses were the most sensible indicator of toxicity. In the near future, such data can subsidize the establishment of toxic reference concentrations able to reflect the characteristics of important tropical pedological occurrences, supporting the definition of sustainable indicators for using sewage sludge in the tropical agriculture.
Starting Page	2281
Ending Page	2292
Page Count	12
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	66
Issue Number	8
e-ISSN	18666299
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-11-24
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sewage sludge Bioassays Ferralsol Chernosol Earthworms Geology
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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