The impact of atmospheric aerosols on trace metal chemistry in open ocean surface seawater 3. Lead

Journal Article · Sun Apr 15 04:00:00 EDT 1990 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/JC095iC04p05341· OSTI ID:5041374

Maring, H B; Duce, R A ^[1]

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1. Univ. of Rhode Island, Narragansett (United States)

Atmospheric aerosols collected at Enewetak Atoll in the tropical North Pacific were exposed to seawater in laboratory experiments to assess the impact of atmospheric aerosols on lead chemistry in surface seawater. The net atmospheric flux of soluble lead to the ocean is between 16 and 32 pmol cm{sup {minus}2}/yr at Enewetak. The stable lead isotopic composition of soluble aerosol lead indicates that it is of anthropogenic origin. Anthropogenic aerosol lead from Central and North America appears to be less soluble and/or to dissolve less rapidly than that from Asia. Dissolved organic matter and possibly lower pH appear to increase the nonaluminosilicate aerosol lead solubility and/or dissolution rate. The isotopic composition of lead in air, seawater and dry deposition suggests that after deposition in the ocean, nonaluminosilicate particulate lead can be reinjected into the atmosphere during sea salt aerosol production.

• OSTI ID: 5041374
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 95:C4; ISSN 0148-0227; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AEROSOLS
AIR
AIR POLLUTION
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
ASIA
BENCH-SCALE EXPERIMENTS
CHEMISTRY
COLLOIDS
DEPOSITION
DISPERSIONS
DISSOLUTION
ELEMENTS
ENIWETOK
ENVIRONMENTAL TRANSPORT
FLUIDS
GASES
HYDROGEN COMPOUNDS
ISLANDS
ISOTOPES
LEAD
LEAD ISOTOPES
MARSHALL ISLANDS
MASS TRANSFER
MATTER
METALS
MICRONESIA
OCEANIA
ORGANIC MATTER
OXYGEN COMPOUNDS
PACIFIC OCEAN
PARTICLES
PARTICULATES
PH VALUE
POLLUTION
POLLUTION SOURCES
SALTS
SEAS
SEAWATER
SILICATES
SILICON COMPOUNDS
SOLS
SOLUBILITY
SURFACE WATERS
SYNTHESIS
WATER
WATER CHEMISTRY