Biogeochemistry of arsenic in natural waters: The importance of methylated species

Journal Article · Fri Mar 01 00:00:00 EST 1991 · Environmental Science and Technology; (USA)

DOI:https://doi.org/10.1021/es00015a007· OSTI ID:5672103

Anderson, L C.D.; Bruland, K W ^[1]

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1. Univ. of California, Santa Cruz (USA)

Water samples from a number of lakes and estuaries, mostly in California, showed measurable concentrations of methylated arsenic (equivalent to 1-59% of total As) with the exception of one highly alkaline lake. Neither depleted phosphate concentrations nor high dissolved salts correlated with the appearance of methylated forms of As. A temporal study of As speciation in Davis Creek Reservoir, a seasonally anoxic lake in northern California, demonstrated that dimethylarsinic acid increased sufficiently to become the dominant form of dissolved As within the surface photic zone during late summer and fall. Methylated forms decreased while arsenate increased when the lake over-turned in early December, which suggested a degradation of dimethylarsinic acid to arsenate.

• OSTI ID: 5672103
• Journal Information: Environmental Science and Technology; (USA), Vol. 25:3; ISSN 0013-936X
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
58 GEOSCIENCES
ARSENIC
BIOGEOCHEMISTRY
DATA ANALYSIS
ESTUARIES
EXPERIMENTAL DATA
LAKES
MEASURING METHODS
CHEMISTRY
DATA
ELEMENTS
GEOCHEMISTRY
INFORMATION
NUMERICAL DATA
SEMIMETALS
SURFACE WATERS
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)
580000 - Geosciences