Treatment with chemical coagulants at different dosing levels changes ecotoxicity of stormwater from the Tahoe basin, California, USA P. A.M. Bachand a , S. M. Bachand a , S. E. Lopus a , A. Heyvaert b & I. Werner c a Bachand & Associates, Davis, California, USA b Desert Research Institute, Reno, Nevada, USA c Univeristy of California, School of Veterinary Medicine, Department of Anatomy, Physi...

naturally occurring radionuclide of terrestrial origin (also called primordial radionuclide) are present in various degrees in all media in the environment, including the human body itself. their concentrations in environment decrease continually by decaying. the main objective of this study is to evaluate the radioactivity levels and health risks due to terrestrial radionuclide in soil of yalo...

In chemical regulation, e.g. the EU Water Framework Directive, REACH, or the Pesticide Directive, standardized ecotoxicological tests are applied to evaluate and rank the hazard of compounds and for deriving environmental quality standards (EQS). Standardized test methods prescribe fixed testing conditions e.g. specific temperature, pH, light intensity etc. However, environmental conditions und...

To assess the potential impacts of agricultural pesticides on tropical freshwater ecosystems, the present study developed temperature-specific, freshwater species protection concentrations (i.e., ecotoxicity threshold values) for 8 pesticides commonly detected in Australia's tropical freshwaters. Because relevant toxicity data for native tropical freshwater species to assess the ecological risk...

Sewage sludge is repeatedly applied as fertilizer on farmland due to its high nutrient content. This may lead to a significant increase of silver nanomaterials (AgNM) in soil over years. Therefore, our aim was to investigate the ecotoxicity and fate of AgNM under environmentally relevant conditions in outdoor lysimeters over 25 months. Two AgNM concentrations (1.7 and 8.0 mg/kg dry matter soil)...

28 Metal immobilization may contribute to the environmental management strategy of 29 dredged sediment landfill sites contaminated by metals. In a field experiment, 30 amendment effects and efficiency were investigated, focusing on plants, springtails and 31 bacteria colonisation, metal extractability and sediment ecotoxicity. Conversely to 32 hydroxylapatite (HA, 3 % DW), the addition of Thoma...

Anneli Kruve and Pilleriin Peets from Stockholm University in Sweden, discuss their latest research machine learning nontargeted liquid chromatography–mass spectrometry (LC–MS) to assess ecotoxicity.

In this study, we performed ecotoxicity tests of sodium arsenite on soil invertebrate Eisenia fetida. Initially, broad range of sodium arsenite (0.1, 1, 10, 100mg/ml) was tested for mortality of E. fetida after 24 hours in filter paper test. The narrow range doses (0-1mg/ml) were further tested to determine the EC50 and LD50. The EC50 dose of sodium arsenite was considered at which 50% of earth...