基于文献计量的铬污染土壤修复领域研究进展与前沿分析

为明确铬污染土壤修复领域的发展历程和研究前沿，本研究以Web of Science(WoS)核心数据库的相关文献为研究对象，运用文献共被引、关键词共现和突现探测的文献计量分析法，从发文量、参考文献和关键词3个角度分别对该领域的受关注程度、知识基础和研究前沿进行分析与讨论。结果表明：铬污染土壤修复领域共发表论文1 972篇，发文量总体呈逐年上升趋势，表明该领域受到越来越广泛的关注。通过文献共被引分析得出该领域的知识基础主要包括以下几个方面：自然条件土壤中铬的生化反应(环境生化)、含铁物质还原(铁化合物和纳米零价铁)、有机物质还原(官能团和生物炭)、铬胁迫(抗铬细菌、植物毒性和铬胁迫)和生物修复，同时微生物修复、植物毒性和纳米零价铁也是目前该领域的研究前沿，应该受到重点关注。本研究结果有望为土壤污染修复和农业安全生产提供理论依据。

Research and frontier analysis on remediation of chromium-contaminated soil based on bibliometric analysis

Based on the core collection database of the Web of Science(WoS), this study conducted a bibliometric analysis(number of publications, references and keywords)to explore the research progress(degree of attention, knowledge base and research frontiers)on remediation of chromium-contaminated soil by literature co-citation, keyword co-occurrence and burst detection. The results show that a total of 1 972 papers in this research filed are published and the annual publication is on the rise overall, indicating that this field is receiving more and more attention. Literature co-citation analysis showed that the knowledge base in this field mainly includes the following aspects: Biochemical reaction of chromium in soil under natural conditions(environmental biochemistry); Reduction of iron-containing substances(iron compound and nanoscale zero-valent iron); Reduction of organic substances(functional group and biochar); Chromium stress(chromium-resistant bacteria, phytotoxicity and Cr stress); Bioremediation. At the same time, microbial remediation, phytotoxicity and nanoscale zero-valent iron are also the research frontiers in this field and should be focused on. This study provide reliable theoretical basis for further research and practical application in this field.