Study of the uptake by duckweed of aluminum, copper, and lead from aqueous solution

Journal Article · Fri Jan 01 00:00:00 EST 1988 · J. Environ. Sci. Health, Part A; (United States)

DOI:https://doi.org/10.1080/10934528809375399· OSTI ID:7090450

Mo, S C; Choi, D S; Robinson, J W

THE UPTAKE OF AL/sup 3 +/, CU/sup 2 +/, AND PB/sup 2 +/ FROM AQUEOUS SOLUTION BY DUCKWEED HAS BEEN OBSERVED AT PH 4.0, 4.5, AND 5.0. THE RESULTS SHOWED THAT THE UPTAKE OF PB/sup 2 +/ WAS MUCH FASTER THAN AL/sup 3 +/ AND CU/sup 2 +/. THE UPTAKE OF CU/sup 2 +/ WAS SUPPRESSED BY THE PRESENCE OF PB/sup 2 +/ AND AL/sup 3 +/. THE PROPORTION OF METAL UPTAKE (PMUT) BY DUCKWEED WAS DEPENDENT ON THE METAL CONCENTRATION IN THE SOLUTION WHEN ONLY ONE KIND OF METAL ION WAS PRESENT. IT WAS DECREASED BY INCREASING CONCENTRATIONS OF OTHER METALS IN MIXTURES OF SOLUTIONS. THE METAL UPTAKE BY THE DUCKWEED WAS ALWAYS LESS THAN THE LOSS OF METAL CONTENT IN THE RELEVANT SOLUTION. THIS FACT IMPLIED THAT THE PROCESS OF THE UPTAKE OF METAL IONS BY THE DUCKWEED MAY INVOLVE TWO STAGES. IN THE FIRST, THE METAL IS ABSORBED BUT THEN LATER IT IS ADSORBED BY THE DUCKWEED. THE ALUMINUM ION WAS FOUND TO BE MORE TOXIC THAN THE COPPER ION AT LOWER PH AND HIGHER CONCENTRATION, BUT THE SITUATION IS REVERSED AT HIGHER PH. A POSSIBLE EXPLANATION OF TOXICITY OF CU/sup 2 +/ AND AL/sup 3 +/ IN CHLOROPHYLL WAS REPLACED BY THE CU/sup 2 +/ OR AL/sup 3 +/. THIS MAY LEAD THE CHLOROPHYLL TO LOSE ITS NORMAL ACTIVITY AND KILL THE DUCKWEED.

• Research Organization: Louisiana State Univ., Baton Rouge (USA)
• OSTI ID: 7090450
• Journal Information: J. Environ. Sci. Health, Part A; (United States), Vol. A23:2
• 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
ALUMINIUM COMPOUNDS
TOXICITY
UPTAKE
COPPER COMPOUNDS
LEAD COMPOUNDS
PLANTS
INJURIES
AQUATIC ORGANISMS
AQUEOUS SOLUTIONS
BIOLOGICAL INDICATORS
CATIONS
CHLOROPHYLL
DOSE-RESPONSE RELATIONSHIPS
PH VALUE
WATER POLLUTION
CARBOXYLIC ACIDS
CHARGED PARTICLES
DISPERSIONS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
IONS
MIXTURES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHYTOCHROMES
PIGMENTS
POLLUTION
PORPHYRINS
PROTEINS
SOLUTIONS
TRANSITION ELEMENT COMPOUNDS
560300* - Chemicals Metabolism & Toxicology
520200 - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)