The Hotspots and Trends of Patented Technologies for Heavy Metal-Contaminated Soil Remediation: A Systematic Review

Wenmin Luo, Guiting Mu, Xianliang Wu, Wei Qin and Yingying Liu ()
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Wenmin Luo: Institute of Biology, Guizhou Academy of Sciences, Guiyang 550009, China
Guiting Mu: Institute of Biology, Guizhou Academy of Sciences, Guiyang 550009, China
Xianliang Wu: Institute of Biology, Guizhou Academy of Sciences, Guiyang 550009, China
Wei Qin: Institute of Biology, Guizhou Academy of Sciences, Guiyang 550009, China
Yingying Liu: Institute of Biology, Guizhou Academy of Sciences, Guiyang 550009, China

Agriculture, 2024, vol. 14, issue 5, 1-17

Abstract: Heavy metal soil pollution severely threatens human health and food safety. This study used PRISMA to systematically review heavy metal-contaminated soil remediation patents in the Derwent Patent Database from 2003 to 2023. A total of 1744 patents were selected. The results of the analysis show that related patent applications are growing around the world. Among them, China has the most significant number of patents, but the layout of transnational patents needs to be revised. Countries have different preferences in transnational patent technology. Technological development is generally balanced, and there is no apparent monopoly. However, the need for continuous in-depth research on inventors is an obstacle to technological development. In addition, the technology in this field is concentrated in chemistry and engineering. Currently, the mainstream technology is soil remediation agents, and thermal desorption technology has also attracted much attention. Future technologies will use new polymer materials and advanced machinery to improve efficiency and control repair costs. In addition, remediation has shifted from the total amount of heavy metals to the control of practical parts. This study summarizes the current status of heavy metal-contaminated soil remediation technology and analyzes future development trends, providing a reference for technology development.

Keywords: soil; heavy metal remediation; patent analysis; research hotspots; research trends (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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