土壤重金属污染具有污染物在土壤中移动性差、滞留时间长、隐蔽、不可逆转等特点,并可通过农作物进入人类食物链,严重影响食品安全并危及人类健康。美国、欧盟、日本和中国等多个国家在土壤重金属污染修复技术研发方面进行了积极部署与研究。该文利用Orbit、Excel等工具,以德温特创新索引Derwent Innovation Index数据库为数据源,对全球土壤重金属污染与修复技术相关专利申请情况进行了统计分析,揭示该领域专利技术的整体发展态势。具体分析专利的年代分布、专利权人、法律状态以及技术领域与技术发展态势等,明确国际上该技术领域的重要专利申请国家和申请机构以及技术分布特征。

Heavy metals in the contaminated soil have poor mobility, long residence time, concealment, irreversibility and other characteristics. Heavy metals can enter the human food chain through crops, and seriously threaten food security and human health. Primary countries or regions such as USA, EU, Japan, and China have deployed actively in the technology research and development. Based on the patents data from the Derwent Innovation Index, the state of the arts of the soil heavy metal pollution and remediation has been obtained by using the statistical tools of the Orbit and Excel. By analyzing the population distributions of the patents as a function of a parameter of International Patent Classification (IPC) such as time, patentee, legal status, and technical field, the technology development trend in the soil heavy metal pollution and remediation has been identified. The results provide a reference for the industry development scheme in this field.