Detoxication of zinc and cadmium by the freshwater protozoan Tetrahymena pyriformis: the effect of water hardness

Journal Article · Thu Oct 01 00:00:00 EDT 1981 · Environ. Res.; (United States)

DOI:https://doi.org/10.1016/0013-9351(81)90185-7· OSTI ID:5918731

Chapman, G; Dunlop, S

Estimated 8-hr LC/sub 50/ values of zinc and cadmium were less than 1 ppm in the absence of soluble calcium and magnesium, but were raised, for example, to 24 ppm of zinc and 19 ppm of cadmium by the addition of calcium plus magnesium at a concentration (500 ppm) equivalent to that of very hard water. Experiments with /sup 65/Zn showed that uptake of this element from sublethal concentrations over 8 hr was reduced from approximately 50 X 10/sup -2/ ..mu..g liter/sup -1/ to 10 X 10/sup -2/ ..mu..g liter/sup -1/ per 10/sup 6/ cells by the addition of 500 ppm of calcium and magnesium. Diminished uptake may partly explain the antagonism observed in the toxicity tests.

• Research Organization: Univ. of London, England
• OSTI ID: 5918731
• Journal Information: Environ. Res.; (United States), Vol. 26:1
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
54 ENVIRONMENTAL SCIENCES
CADMIUM
TOXICITY
RESPONSE MODIFYING FACTORS
ZINC
CALCIUM
CATIONS
MAGNESIUM
QUANTITY RATIO
TETRAHYMENA
UPTAKE
WATER CHEMISTRY
ZINC 65
ALKALINE EARTH METALS
ANIMALS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED PARTICLES
CHEMISTRY
CILIATA
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTS
EVEN-ODD NUCLEI
INTERMEDIATE MASS NUCLEI
INVERTEBRATES
IONS
ISOTOPES
METALS
MICROORGANISMS
NUCLEI
PROTOZOA
RADIOISOTOPES
ZINC ISOTOPES
560302* - Chemicals Metabolism & Toxicology- Microorganisms- (-1987)
520200 - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)