Trace metal interactions with microbial biofilms in natural and engineered systems
Journal Article
·
· CRC Critical Reviews in Environmental Control; (USA)
- Cornell Univ., Ithaca, NY (USA)
Trace metal adsorption and desorption are important processes in natural aquatic systems and in designed treatment systems. Adsorption of metals onto particulate matter and humic substances has been documented in fresh water and marine systems. Although biofilms coating surfaces are well documented, the chemical mechanisms concerning metal removal have not been investigated thoroughly. Biofilms consist predominantly of bacterial cells enmeshed in a network of negatively charged extracellular polymers. The biofilms are assumed to contain ferromanganese deposits which can play an important role in trace metal absorption. Microorganisms have developed resistance to metal toxicity, especially since the Industrial Revolution. Detoxification mechanisms include biomethylation, biosynthesis of intracellular traps, cellular efflux, synthesis of chelating agents, and surface precipitation. Mathematical models have been developed to describe various aspects of trace metal interaction with surfaces: (1) cellular growth, attachment, and polymer production; (2) metal binding to inorganic surfaces; (3) metal binding to cellular surfaces; and (4) biofilm model integrated with a metal-binding model.
- OSTI ID:
- 7189931
- Journal Information:
- CRC Critical Reviews in Environmental Control; (USA), Journal Name: CRC Critical Reviews in Environmental Control; (USA) Vol. 17:4; ISSN CCECA; ISSN 0007-8999
- Country of Publication:
- United States
- Language:
- English
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Thu Nov 30 23:00:00 EST 1995
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OSTI ID:126546
Related Subjects
560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ADSORPTION
BACTERIA
BIODEGRADATION
CHELATING AGENTS
CHEMICAL REACTIONS
DECOMPOSITION
DESORPTION
DETOXIFICATION
ELEMENTS
GROWTH
MASS TRANSFER
MATHEMATICAL MODELS
METALS
MICROORGANISMS
PARTICLES
PARTICULATES
POLLUTION
REMOVAL
SENSITIVITY
SORPTION
TRACE AMOUNTS
WATER POLLUTION
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ADSORPTION
BACTERIA
BIODEGRADATION
CHELATING AGENTS
CHEMICAL REACTIONS
DECOMPOSITION
DESORPTION
DETOXIFICATION
ELEMENTS
GROWTH
MASS TRANSFER
MATHEMATICAL MODELS
METALS
MICROORGANISMS
PARTICLES
PARTICULATES
POLLUTION
REMOVAL
SENSITIVITY
SORPTION
TRACE AMOUNTS
WATER POLLUTION