scholarly journals Synchronous-scan fluorescence of algal cells for toxicity assessment of heavy metals and herbicides

2009 ◽  
Vol 72 (2) ◽  
pp. 316-320 ◽  
Author(s):  
Hanh Nguyen-Ngoc ◽  
Claude Durrieu ◽  
Canh Tran-Minh
Keyword(s):  
Heavy Metals ◽  
Toxicity Assessment ◽  
Synchronous Scan

scholarly journals Toxicity Effects of Selected Heavy Metals on Lactuca sativa and Hydra viridissima used for Sustainable Crop Production

2018 ◽  
Vol 7 (3) ◽  
pp. 82
Author(s):  
Lina Maria Caceres Diaz ◽  
Claudia Campos ◽  
Gideon Oron
Keyword(s):  
Heavy Metals ◽  
Acute Toxicity ◽  
Lactuca Sativa ◽  
Toxicity Test ◽  
Crop Production ◽  
Arid Regions ◽  
Toxicity Assessment ◽  
Agricultural Irrigation ◽  
Lactuca Sativa L ◽  
Toxicity Effects

This study examines the prospects for using Hydra viridissima toxicity test 96-h LC50, served as a model invertebrate, Lactuca sativa L. was applied for seeds toxicity test (120-h IC50) and a model plant for an acute toxicity assessment of heavy metals content in water. The heavy metals used to assess the acute toxicity of the water utilized for agricultural irrigation in arid regions includes cadmium (CdCl2.2H2O), chromium (K2Cr2O7), zinc (ZnSO4. 7H2O), and boron (H3BO3). A grading of the substances was conducted, and it was found that the toxicity levels for H. viridissima and L. sativa were, with the least harmful first: B < Cr < Zn < Cd and Zn < B < Cr < Cd, respectively. Results indicate that H. viridissima was a more sensitive indicator of toxicity for all of the evaluated substances. However, L. sativa could also be used successfully to rank toxicants in order of their potential hazards.

scholarly journals Toxicity Assessment of Sediments with Natural Anomalous Concentrations in Heavy Metals by the Use of Bioassay

2010 ◽  
Vol 2010 ◽  
pp. 1-6 ◽  
Author(s):  
Francisco Martín ◽  
Marlon Escoto ◽  
Juan Fernández ◽  
Emilia Fernández ◽  
Elena Arco ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Vibrio Fischeri ◽  
Toxicity Assessment ◽  
Water Soluble ◽  
Ultramafic Rocks ◽  
Moderate Degree ◽  
Toxicity Bioassay ◽  
Potential Toxicity ◽  
Riverbed Sediments ◽  
Low Degree

The potential toxicity in riverbed sediments was assessed with a bioassay using the bioluminescent bacteriaVibrio fischeri. The selected area was characterized by the presence of ultramafic rocks (peridotites), and the sediments had high values in Ni, Cr, and Co. For the toxicity bioassay withVibrio fischeri, water-soluble forms were used. The results indicated that most of the samples had a very low degree of toxicity, with 10% of reduction in luminescence in relation to the control; meanwhile 25% of the samples had a moderate degree of toxicity with a reduction in luminescence between 13 and 21% in relation to the control. The toxicity index correlated significantly with the concentrations of Ni and Cr in the water extracts. This toxicity bioassay was proved to be a sensitive and useful tool to detect potential toxicity in solutions, even with anomalous concentrations in heavy metals of natural origin.

Sign in / Sign up

Export Citation Format

Share Document