底泥中多环芳烃微生物修复研究现状和趋势的文献计量分析

s a common green remediation method, bioremediation has a broad application prospect in the remediation of organic pollution in sediment. Based on the core database of Web of Science, the research hotspots and trends of bioremediation of polycyclic aromatic hydrocarbons (PAHs) in sediment from 1998 to 2020 were analyzed by CiteSpace. The results showed that ①The number of published papers on the bioremediation of PAHs in sediment presents a rapid upward trend and the research directions are mainly environmental science, engineering and marine and freshwater biology. The top two countries with the number of published papers are China and the United States, and the contribution of the Chinese Academy of Sciences is greatest among the research institutions in the world. ②The analysis of keywords shows that the research hotspots are focused on the types of PAH compounds (mainly naphthalene, phenanthrene and pyrene), bioavailability of PAHs, combined pollution of PAHs and other organic pollutants. ③The analysis of research trend shows that the research frontiers are bioremediation of PAHs and variation of microbial diversity in sediment, and the impact of heavy metals on bioremediation of PAHs. Based on the comprehensive analysis of the previous studies, in the future, the main challenge of bioremediation of PAHs in sediment is under the circumstances with coexistence of heavy metals and/or other organic pollutants.