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Biosorption of metal contaminants using immobilized biomass - a laboratory study.

Authors
Jeffers-TH; Ferguson-CR; Bennett-PG
Source
Salt Lake City, UT: U.S. Department of the Interior, Bureau of Mines, RI 9340, 1991 Jan; :1-9
Link
NIOSHTIC No.
10008550
Abstract
The U.S. Bureau of Mines has developed porous beads containing immobilized biological materials for removing metal contaminants from waste waters. The beads, designated as bio-fix beads, are prepared by blending biomass, such as sphagnum peat moss or algae, into a polymer solution and spraying the mixture into water. Laboratory studies were conducted to determine bead sorption and elution characteristics. Batch and continuous tests demonstrated that bio-fix beads sorbed arsenic, cadmium, lead, and other toxic metals from acid mine drainage waters collected from several sites. Selectivity for heavy and toxic metal ions over calcium and magnesium was demonstrated. The beads exhibited excellent metal sorption and handling characteristics in stirred tanks, column contactors, and a low-maintenance passive system. The sorption process was reversible, and metal ions were eluted from the beads using dilute mineral acids. Cyclic tests indicated that the beads continued to extract metal ions after repeated loading-elution cycles.
Keywords
Metallurgy; Laboratory-testing; Water-sampling; Waste-treatment; Environmental-contamination; Sorption; Biomass; Performance-evaluation; Kinetics; Elution; Immobilization; Ground-water; Process-charting; Metals; Water-pollution-control; Acid-mine-drainage; Biological-treatment; Polysulfones; BIO-FIX-beads; Biosorption
Publication Date
19910101
Document Type
IH; Report of Investigations
Fiscal Year
1991
NTIS Accession No.
PB92-177385
NTIS Price
A03
Identifying No.
RI-9340
NIOSH Division
SLRC
Source Name
Salt Lake City, UT: U.S. Department of the Interior, Bureau of Mines, RI 9340
State
UT
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