Research Progress on Remediation of Heavy Metal Pollution in Farmland Soils at Home and Abroad - Based on CiteSpace Knowledge Map Analysis

Based on the literature of China National Knowledge Infrastructure (CNKI) and Web of Science database, CiteSpace bibliometric tool was used to analyze the relevant literature in the field of remediation of heavy metal pollution in farmland soil from the aspects of number of publications, countries, authors and keywords from 2000 to 2021, so as to explore the research status and future development trend in this field at home and abroad. The results showed that the number of literatures on heavy metal pollution remediation in farmland soil increased rapidly. China, the United States and South Korea were the countries with more foreign literatures. Chinese scientific research institutions occupied an important position in the number of foreign literature publications, indicating that China has a strong international academic influence in this research field. According to the frequency analysis of keywords, the accumulation characteristics and remediation of multi-metal compound pollution such as cadmium and lead in soil were the main research contents in this field, and the application of phytoremediation technology in the remediation of heavy metal pollution in farmland soil was a hot topic in this field. The comprehensive remediation system composed of physical and chemical remediation combined with bioremediation technology is the main research direction in the field of soil heavy metal pollution remediation in the future.