河口沉积物芘降解菌的筛选鉴定及芘降解能力研究

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文章编号：1674-6139（2026）04-0105-05

中图分类号：X53文献标志码：B

Isolation，Identification，andPyrene Degradation Ability ofPyrene-Degrading Bacteria from Estuarine Sediments

Chen Rui1，2

（1.Shanghai Construction Environmental Technology Co.，Ltd.，Shanghai 2OOo63，China： 2.Shanghai Shenhuan Environmental Engineering Co.，Ltd.，Shanghai 2Ooo92，China）

Abstract：Polycyclicaromatichydrocarbons（PAHs）arecommonpersistentorganicpolutants insoilenvironments.Pyrene，samodelcompoudofAHs，isidelydistributedinstuarinesdimentsoils.Thissudytargeedpyreneplltionbysolatingandg64 bacterialstrainsfromsdimentsamplesoftePearlRiverEstuaryrimarilyelongingtotepylaFmicutesandProteobacteria，ich exhibitedpyrendegrdingapabili.Basedonylenetictreconstuctionightpylgeneticallyistantstrainseeselectedfor single-strainpyrenedegradationexperimentsTheresultsshowedthatRhodococcstrainsPrR184andPrROOlhadthebestdegradation abilitieswihain84utpefoingrROsefdingsofiteotentialofodoocstrainstogades，dic tingtheirapplicabilityinthe bioremediationof pyreneand otherPAHcontaminants in estuarine sedimentsand soils.

Keywords：pyrene；biodegradation；rhodococcus；polycyclic aromatic hydrocarbons

前言

多环芳烃（PAHs）是一类由两个或多个苯环以线状、角状或簇状排列组成的持久性有机污染物（POPs），在土壤具有潜在的生态和环境毒理效应，研究发现珠江口表层沉积物中PAHs含量范围在56.6～1297ng/g ，处于中等水平并具有一定的生态风险[1；中国表层土壤中PAHs含量范围为313.10～1 070.45ng/g ，处于中度污染水平并呈现省域浓度差异[2]。（剩余5899字）