In total,9,552 documents were extracted from the Web of Science Core Collection and subjected to knowledge mapping and visualization analysis for the field of phytoremediation of HM-contaminated soil(PHMCS)with CiteSpace 5.7 R3 software.The results showed that(1)the number of publications increased linearly over the studied period.The top 10 countries/regions,institutions and authors contributing to this field were exhibited.(2)Keyword co-occurrence cluster analysis revealed a total of 8 clusters,including"Bioremediation,""Arsenic,""Biochar,""Oxidative stress,""Hyperaccumula-tion,""EDTA,""Arbuscular mycorrhizal fungi,"and"Environmental pollution"clusters(3)In total,334 keyword bursts were obtained,and the 25 strongest,longest duration,and newest keyboard bursts were analyzed in depth.The strongest keyword burst test showed that the hottest keywords could be divided into 7 groups,i.e.,"Plant bioremediation materials,""HM types,""Chelating amendments,""Other improved strategies,""Technical terminology,""Risk assessment,"and"Other."Almost half of the newest topics had emerged in the past 3 years,including"biochar,""drought,""health risk assessment,""electrokinetic remediation,""nanoparticle,"and"intercropping."(4)In total,9 knowledge base clusters were obtained in this study.The studies of Ali et al.(2013),Blaylock et al.(1997),Huang et al.(1997),van der Ent et al.(2013),Salt et al.(1995),and Salt(1998),which had both high frequencies and the strongest burst scores,have had the most profound effects on PHMCS research.Finally,future research directions were proposed.

Kehui Liu;Xiaojin Guan;Chunming Li;Keyi Zhao;Xiaohua Yang;Rongxin Fu;Yi Li;Fangming Yu

Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection(Ministry of Education),Guangxi Normal University,Guilin 541004,China;School of Life Sciences,Fudan University,Shanghai 200438,China;Guangxi Normal University Library,Guangxi Normal University,Guilin 541004,China

环境科学与工程前沿

[1]Kehui Liu;Xiaojin Guan;Chunming Li;Keyi Zhao;Xiaohua Yang;Rongxin Fu;Yi Li;Fangming Yu-.Global perspectives and future research directions for the phytoremediation of heavy metal-contaminated soil:A knowledge mapping analysis from 2001 to 2020)[J].环境科学与工程前沿,2022(06):71-90

PHMCS,Bioremediation,Hyperaccumula,keyboard,Chelating,Blaylock

Global,perspectives,future,research,directions,phytoremediation,heavy,metal,contaminated,soil,knowledge,mapping,analysis,from,In,total,documents,were,extracted,Core,Collection,subjected,visualization,field,R3,software,results,showed,that,number,publications,increased,linearly,over,studied,period,countries,regions,institutions,authors,contributing,this,exhibited,Keyword,occurrence,revealed,clusters,including,Arsenic,Biochar,Oxidative,stress,EDTA,Arbuscular,mycorrhizal,fungi,Environmental,pollution,bursts,obtained,strongest,longest,duration,newest,analyzed,depth,hottest,keywords,could,divided,into,groups,Plant,bioremediation,materials,types,amendments,Other,improved,strategies,Technical,terminology,Risk,assessment,Almost,half,topics,had,emerged,past,years,biochar,drought,health,risk,electrokinetic,nanoparticle,intercropping,base,study,studies,Ali,Huang,van,der,Ent,Salt,which,both,high,frequencies,scores,have,profound,effects,Finally,proposed

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