Repository of Research and Investigative Information

Repository of Research and Investigative Information

Larestan University of Medical Sciences

Interactions of Cd, Cr, Pb, Ni, and Hg in their effects on activated sludge bacteria by using two analytical methods

(2019) Interactions of Cd, Cr, Pb, Ni, and Hg in their effects on activated sludge bacteria by using two analytical methods. Environ Monit Assess. p. 124. ISSN 1573-2959 (Electronic) 0167-6369 (Linking)

[img]
Preview
Text
Interactions of Cd, Cr, Pb, Ni, and Hg in their effects on activated sludge bacteria by using two analytical methods.pdf

Download (1MB) | Preview

Official URL: https://www.ncbi.nlm.nih.gov/pubmed/30710209

Abstract

Since trace metals rarely appear singly in industrial effluents, it is a major challenge to address combined effects of such toxicants on biological units of wastewater treatment plants. The aim of this study was interaction assessment of Cd, Cr, Pb, Ni, and Hg in their effects on activated sludge bacteria using analytical methods. Two mathematical models were used to determine the effect of binary mixtures of Hg, Cd, Cr, Pb, and Ni on activated sludge bacteria using a dehydrogenase enzyme assay. Calculated EC50 values were compared to experimentally observed values of mixtures. Interactive effects were counted to be antagonistic for Hg and Cd, Cd and Pb, Cd and Ni, and Cr and Pb, synergistic for Cd and Cr and Hg and Cr, and additive for other binary mixtures. Maximum toxicity was related to Hg and Cr, Cd and Cr, and Hg and Cd. Physicochemical monitoring of single metals may underestimate hazards arising from these pollutants in environmental samples. Therefore, any possible interaction between metals in such environments should be considered when establishing environmental safety standards.

Item Type: Article
Keywords: Bacteria/metabolism Cadmium/analysis Environmental Monitoring/*methods Environmental Pollutants/*analysis Lead/analysis Mercury/analysis Metals, Heavy/*analysis Sewage Trace Elements/*analysis Ec50 Modeling Synergistic Toxicity
Divisions: Education Vice-Chancellor Department > Faculty of Health > Department of Public health
Page Range: p. 124
Journal or Publication Title: Environ Monit Assess
Journal Index: Pubmed
Volume: 191
Number: 3
Identification Number: https://doi.org/10.1007/s10661-019-7241-6
ISSN: 1573-2959 (Electronic) 0167-6369 (Linking)
Depositing User: خانم موهبت شیوخی
URI: http://eprints.larums.ac.ir/id/eprint/164

Actions (login required)

View Item View Item