Valenzuela C, Campos V L, Yañez J, Zaror C A, Mondaca M A
Microbiology Department, University of Concepción, P.O. Box 160-C, Correo 3, Concepción, Chile.
Bull Environ Contam Toxicol. 2009 May;82(5):593-6. doi: 10.1007/s00128-009-9659-y. Epub 2009 Feb 4.
In Northern Chile, high arsenic concentrations are found in natural water, both natural and anthropogenic sources, a significant health risk. Nine bacterial strains were isolated from Camarones river sediments, located in Northern Chile, a river showing arsenic concentrations up to 1,100 microg/L. These strains were identified as Pseudomonas and they can oxidize arsenite (As(III)) to the less mobile arsenate (As(V)). The arsenite oxidase genes were identified in eight out of nine isolates. The arsenite oxidizing ability shown by the nine strains isolated from arsenic enriched sediments open the way to their potential application in biological treatment of effluents contaminated with arsenic.
在智利北部，天然水体中存在高浓度砷，其来源既有天然的也有人类活动造成的，这构成了重大的健康风险。从智利北部的卡马罗内斯河沉积物中分离出九株细菌，该河砷浓度高达1100微克/升。这些菌株被鉴定为假单胞菌，它们能够将亚砷酸盐（As(III)）氧化为移动性较低的砷酸盐（As(V)）。在九株分离菌株中有八株鉴定出了亚砷酸盐氧化酶基因。从富含砷的沉积物中分离出的这九株菌株所表现出的亚砷酸盐氧化能力，为它们在生物处理受砷污染废水方面的潜在应用开辟了道路。
