Physical, chemical, and biological consequences of episodic aluminum additions to a stream

Journal Article · Tue Jan 01 04:00:00 EST 1985 · Limnol. Oceanogr.; (United States)

DOI:https://doi.org/10.4319/lo.1985.30.1.0212· OSTI ID:5523500

Hall, R J; Driscoll, C T; Likens, G E; Pratt, J M

AlCl/sub 3/ was added to a second-order stream to simulate episodic increases in Al concentration during acidic snowmelt. Significant decreases in pH and DOC and accumulation of foam at the surface (visible evidence of reduced surface tension) accompanied a stepwise increase in Al in the water. Laboratory experiments corroborated field results, added Al producing a 20% reduction in surface tension. The authors suggest that added Al may have associated with organic functional groups, rendering DOC more hydrophobic and less soluble. Terrestrial and aquatic invertebrate drift was also altered with elevated Al. The authors attribute drift to responses to chemical changes in the stream such as Al and H/sup +/ toxicity or to a physical change in surface film.

• Research Organization: Cornell Univ., Ithaca, NY
• OSTI ID: 5523500
• Journal Information: Limnol. Oceanogr.; (United States), Journal Name: Limnol. Oceanogr.; (United States) Vol. 30:1; ISSN LIOCA
• Country of Publication: United States
• Language: English

Related Subjects

520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACID RAIN
ALUMINIUM CHLORIDES
ALUMINIUM COMPOUNDS
ANIMALS
ARTHROPODS
ATMOSPHERIC PRECIPITATIONS
CHEMISTRY
CHLORIDES
CHLORINE COMPOUNDS
ENVIRONMENTAL EFFECTS
FEDERAL REGION I
HALIDES
HALOGEN COMPOUNDS
INSECTS
INVERTEBRATES
NEW HAMPSHIRE
NORTH AMERICA
PH VALUE
RAIN
SNOW
STREAMS
SURFACE PROPERTIES
SURFACE TENSION
SURFACE WATERS
THAWING
USA
WATER CHEMISTRY