Chromium(VI) resistance and removal by actinomycete strains isolated from sediments

被引：102
作者：
Polti, Marta A.
Amoroso, Maria J.
Abate, Carlos M.
机构：
[1] Consejo Nacl Invest Cient & Tecn, PROIMI, RA-4000 San Miguel De Tucuman, Argentina
[2] Univ Nacl Tucuman, Fac Ciencias Nat, RA-4000 San Miguel De Tucuman, Argentina
[3] Univ Nacl Tucuman, Inst Miguel Lillo, RA-4000 San Miguel De Tucuman, Argentina
[4] Univ Nacl Tucuman, Fac Bioquim Quim & Farm, RA-4000 San Miguel De Tucuman, Argentina
来源：
CHEMOSPHERE | 2007年 / 67卷 / 04期
关键词：
actinomycetes; bioremediation; phylogenetic analysis; heavy metals; chromium(VI); bioremoval; CHROMATE REDUCTION; ENRICHMENT CONSORTIUM; HEXAVALENT CHROMIUM; OXIDATIVE STRESS; CYTOTOXICITY; PURIFICATION; BIOSORPTION; COMMUNITIES; MEMBRANE; BACTERIA;
D O I：
10.1016/j.chemosphere.2006.11.008
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Forty-one isolated actinomycetes were used to study qualitative and semi-quantitative screening of chromium(VI) resistance. Chromate-removing activity was estimated using the Cr(VI) specific colorimetric reagent 1,5-diphenylcarbazide. Twenty percent of the isolates from El Cadillal (EC) and 14% of isolates from a copper filter plant (CFP) were able to grow at 13 mM of Cr(VI). All isolates from sugar cane (SCP) could grow up to Cr(VI) concentration of 17 mM. EC, CFP and SCP strains were able to remove 24%, 30% and more than 40% of Cr(VI), respectively. The highest and lowest Cr(VI) specific removal values were 75.5 mg g(-1) cell by M3 (CFP), and 1.5 mg g(-1) cell by C35 (EC) strains. Eleven Cr(VI) resistant strains were characterized and identified as species of the genera Streptomyces (10) and Amycolatopsis (1). Differences on actinomycete community composition between contaminated and non-contaminated soil were found. This study showed the potential capacity of actinomycetes as tools for Cr(VI) bioremediation. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：660 / 667
页数：8
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