DEGRADATION OF PHENOLS BY ALGAE
DEGRADATION OF PHENOLS BY ALGAE
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DOI：
10.1080/09593339209385176
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发表时间：
1992-05-01
影响因子：
2.8
通讯作者：
KOSARIC, N
中科院分区：
文献类型：
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作者：
KLEKNER, V;KOSARIC, N
小球藻菌株，对美国环保署列为优先污染物的一些酚类化合物进行了降解试验。将毒素溶解在没有碳源的培养基（pH 7 - 7.2）中（除了测试螺旋藻，在这种情况下，碳酸氢钠是pH 9 - 9.2的培养基的一部分），并加入通过分批培养制备的藻类。苯酚被发现很容易被降解的所有测试的藻类在浓度约1000毫克L-1。发现2，4-二甲基苯酚被小球藻（即使在约1000 mg l-1的浓度下）转化为在某些情况下积累在培养基中的二甲基苯并呋喃的异构体。降解速率随生物量和毒素浓度的变化而变化，可能存在诱导降解的最佳毒素浓度。完全降解可以达到生物质浓度高于4克升-1。2，4-二硝基苯酚在约190毫克L-1的浓度降解栅藻后，迅速适应期为5天。2-浓度为200 mg l-1的氯酚被小球藻降解并部分脱氯。虽然尚未证实2，4-二氯酚的生物降解性，但可以发现藻类在较高浓度的毒素下能够存活的条件，所测试的藻类都具有降解酚类化合物的机制。
Strains of Chlorella sp., Scenedesmus obliquus and Spirulina maxima were tested for degradation of some phenolic compounds listed by U.S. EPA as priority pollutants. Toxins were dissolved in a medium (pH 7 - 7.2) without carbon source (except for testing Spirulina, in which case sodium bicarbonate was part of the medium at pH 9 - 9.2) and algae prepared by batch cultivation were added. Phenol was found to be degraded easily by all tested algae at a concentration about 1000 mg l-1. 2,4-dimethylphenol was found to be converted by Chlorella (even at a concentration of about 1000 mg l-1) to an isomer of dimethylbenzenediol that was in some cases accumulated in the medium. Depending upon biomass and toxin concentration the rate of degradation changed and an optimum of toxin concentration which induces degradation might exist. Complete degradation could be reached with biomass concentrations higher than 4 g l-1. 2,4-dinitrophenol at a concentration of about 190 mg l-1 was degraded by Scenedesmus quickly after an adaptation period of 5 days. 2-chlorophenol at a concentration about 200 mg l-1 was degraded and partly dechlorinated by Chlorella. Biodegradation of 2,4-dichlorophenol was not proven but the condition under which algae can survive a higher concentration of toxin could be found. All algae tested have a mechanism for degradation of phenolic compounds.