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Title: Algal growth effects on arsenic transport in a mining-impacted stream

Increased periphyton abundance in Whitewood Creek, South Dakota during the summer months suggests that chemical interactions involving arsenic (As) between biota and the overlying waters may significantly affect As transport and distribution in this mining-impacted stream. Arsenic transport parameters (e.g., uptake rate constants, standing crop and accumulation factors) for algae collected in the creek from upstream of a mine discharge through a 25 mile impacted reach are being determined. Cultures of Stichococcus spp Nageli (chlorophyceae) were isolated from four sites along a dissolved As concentration gradient within the study reach and then maintained at ambient dissolved As concentrations. Arsenic uptake and release rate constants for these isolates as a function of dissolved arsenate and orthophosphate have been determined. All isolates appeared to have some As exculsion mechanism involving an interaction with dissolved phosphate. Results from transport parameter measurements indicate that periphyton represent a significant As pool interacting with the surrounding solution and solid phases.
Authors:
; ;  [1]
  1. (Geological Survey, Menlo Park, CA (USA))
Publication Date:
OSTI Identifier:
5444216
Report Number(s):
CONF-8708345--
Journal ID: ISSN 0022-3646; CODEN: JPYLA
Resource Type:
Conference
Resource Relation:
Journal Name: Journal of Phycology; (USA); Journal Volume: 23; Conference: Annual meeting of the Phycological Society of America, Columbus, OH (USA), 9-13 Aug 1987
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; ALGAE; GROWTH; ARSENIC; BIOLOGICAL ACCUMULATION; ENVIRONMENTAL TRANSPORT; STREAMS; CONTAMINATION; SOUTH DAKOTA; TOXICITY; WATER POLLUTION; ELEMENTS; FEDERAL REGION VIII; MASS TRANSFER; NORTH AMERICA; PLANTS; POLLUTION; SEMIMETALS; SURFACE WATERS; USA 540320* -- Environment, Aquatic-- Chemicals Monitoring & Transport-- (1990-); 560300 -- Chemicals Metabolism & Toxicology