Biodegradation of Hydrophobic Polycyclic Aromatic Hydrocarbons
Biodegradation of Hydrophobic Polycyclic Aromatic Hydrocarbons
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DOI：
10.1007/978-981-15-6607-3_6
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
D. C. Ali;Zhilong Wang
中科院分区：
文献类型：
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作者：
D. C. Ali;Zhilong Wang
多环芳烃(PAHs)是一类疏水、有毒、致癌的化合物，分为大分子(HMW)和小分子(LMW)两类，根据芳香环的不同进行分类。美国儿童环境健康中心(CCEH)已报告了PAHs对孕妇持续暴露在污染环境中的负面影响，如早产和儿童发育迟缓。本文简要介绍了多环芳烃的生物降解途径以及有效降解多环芳烃所涉及的酶类。然而，生物降解效率是有限的，因为这些化合物具有高度的亲油性，因此非常不溶于水溶液。适当讨论了微生物生产生物表面活性剂及其对多环芳烃持续降解的贡献。
Polycyclic aromatic hydrocarbons (PAHs) are hydrophobic, toxic, and carcinogenic compounds which comprise of high molecular weight (HMW) and low molecular weight (LMW) compounds and are classified based on different aromatic rings present. PAHs have been reported on its negative implications by the US Center for Children’s Environmental Health (CCEH) on consistent exposure to polluted environment among the pregnant woman such as premature child delivery and delayed in child development. In this review, biodegradation pathway of PAHs (naphthalene, fluoranthene, and pyrene) and its proceeding enzymes involved for effective degradation of PAHs are briefly discussed. However, the biodegradation efficiency is limited because the compounds are highly lipophilic and therefore very insoluble in an aqueous solution. The production of biosurfactants by microorganisms and its contribution to ongoing degradation of PAHs are properly discussed.