A Rhamnolipid Biosurfactant Reduces Cadmium Toxicity during Naphthalene Biodegradation

Applied and Environmental Microbiology - Tập 66 Số 10 - Trang 4585-4588 - 2000
Todd R. Sandrin1, Andrea M. Chech1, Raina M. Maier1
1Department of Soil, Water, and Environmental Science, University of Arizona, Tucson, Arizona, 85721

Tóm tắt

ABSTRACT A model cocontaminated system was developed to determine whether a metal-complexing biosurfactant, rhamnolipid, could reduce metal toxicity to allow enhanced organic biodegradation by a Burkholderia sp. isolated from soil. Rhamnolipid eliminated cadmium toxicity when added at a 10-fold greater concentration than cadmium (890 μM), reduced toxicity when added at an equimolar concentration (89 μM), and had no effect at a 10-fold smaller concentration (8.9 μM). The mechanism by which rhamnolipid reduces metal toxicity may involve a combination of rhamnolipid complexation of cadmium and rhamnolipid interaction with the cell surface to alter cadmium uptake.

Từ khóa


Tài liệu tham khảo

10.1128/AEM.66.8.3262-3268.2000

10.1128/aem.33.3.696-705.1977

Babich H. Stotzky G. Effect of cadmium on microbes in vitro and in vivo : influence of clay minerals Microbial ecology. Babich H. Stotzky G. 1978 412 415 Springer-Verlag Berlin Germany

Enger E. D. Smith B. F. Hazardous and toxic wastes. Environmental science: the study of interrelationships. Enger E. D. Smith B. F. 1992 Wm. C. Brown Publishers Dubuque Iowa

10.1128/jb.113.1.417-432.1973

10.1016/S0020-7519(83)80062-9

Gray G. W. Wilkinson G. The action of ethylenediaminetetraacetic acid on Pseudomonas aeruginosa. J. Appl. Bacteriol. 28 1965 153 164

10.1021/es00009a019

10.1128/aem.63.9.3622-3627.1997

10.1128/jb.154.1.269-277.1983

10.1007/BF02374221

10.1016/0006-291X(65)90191-9

10.1016/S0021-9258(19)52451-6

10.1128/AEM.64.11.4610-4613.1998

Maslin P. M. and R. M. Maier. Rhamnolipid-enhanced mineralization of phenanthrene in organic-metal co-contaminated soils. Biorem. J. in press.

10.1128/aem.54.5.1182-1187.1988

Ochoa F. J. J. F. Artiola and R. M. Maier. Stability constants for the complexation of various metals with a rhamnolipid biosurfactant. J. Environ. Qual. in press.

Remacle J. The cell wall and metal binding Biosorption of heavy metals. Volesky B. 1990 83 92 CRC Press Inc. Boca Raton Fla

Roane T. M. Pepper I. L. Microbial remediation of soils co-contaminated with 2 4-dichlorophenoxy acetic acid and cadmium Proceedings of the 12th Annual Conference on Hazardous Waste Research: Building Partnership for Innovative Technologies 1997 343 356Kansas City Mo.

10.1128/aem.57.5.1498-1503.1991

10.1021/es00062a027

10.1021/es970285o

10.1128/JB.173.2.697-703.1991

10.1021/es960687g

10.1128/aem.58.10.3276-3282.1992

10.1128/aem.60.6.2101-2106.1994

10.1128/aem.61.6.2247-2251.1995

Thông tin
Thông tin xuất bản

Applied and Environmental Microbiology

Tập 66 Số 10

4585-4588

Thông tin tác giả