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多氯联苯的细菌降解 II. 速率研究

Bacterial degradation of polychlorinated biphenyls II. Rate studies.

作者信息

Wong P T, Kaiser K L

出版信息

Bull Environ Contam Toxicol. 1975 Feb;13(2):249-55. doi: 10.1007/BF01721747.

Abstract

Polychlorinated biphenyls (Aroclor 1221, 1242 and 1254) at concentrations up to 0.1% in glucose did not inhibit the growth of lake water bacteria. The bacteria used Aroclor 1221 and 1242 but not 1254 as sole carbon and energy sources for growth. Less than 1% of lake water bacteria, however, possess this ability. Seven bacterial isolates from Aroclor agar plates were identified; five belonged to Achromobacter sp. and two were Pseudomonas sp. The metabolic breaksown of Aroclor 1221 was followed. THE MIXTURE WAS COMPLETELY DEGRADED INTO SEVERAL LOW MOLECULAR WEIGHT COMPOUNDS AFTER ONE MONTH INCUBATION. Unchlorinated biphenyl was degraded at a faster rate than 2-chlorobiphenyl and 4-chlorobiphenyl isomers.

摘要

葡萄糖中浓度高达0.1%的多氯联苯(Aroclor 1221、1242和1254)并未抑制湖水细菌的生长。这些细菌将Aroclor 1221和1242用作生长的唯一碳源和能源,但不利用1254。然而,只有不到1%的湖水细菌具备这种能力。从Aroclor琼脂平板上分离出7株细菌;其中5株属于无色杆菌属,2株为假单胞菌属。对Aroclor 1221的代谢分解过程进行了跟踪。培养一个月后,该混合物完全降解为几种低分子量化合物。未氯化的联苯比2-氯联苯和4-氯联苯异构体的降解速度更快。

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