FigsharePub Date : 2020-11-23DOI: 10.1021/acsearthspacechem.0c00261.s001
Guangci Zeng (9624132), Kai Yu (50223), Junying Li (276498), Wenxian Wu (322095), Han Qiao (4246930), Yanhua Duan (519681), Chongxuan Liu (1482433)
{"title":"Heavy Metal Accumulation and ReleasenRisks in Sediments from Groundwater–River Water InteractionnZones in a Contaminated River under Restoration","authors":"Guangci Zeng (9624132), Kai Yu (50223), Junying Li (276498), Wenxian Wu (322095), Han Qiao (4246930), Yanhua Duan (519681), Chongxuan Liu (1482433)","doi":"10.1021/acsearthspacechem.0c00261.s001","DOIUrl":"https://doi.org/10.1021/acsearthspacechem.0c00261.s001","url":null,"abstract":"Thisnstudyninvestigated the accumulation and release risks of heavy metals As,nCd, Co, Cr, Cu, Ni, Pb, and Zn in representative contaminated river-bednand river-side sediments from a groundwater–river water interactionnzone (GRIZ) currently under restoration. The results revealed differentnaccumulation and release risk behaviors of the heavy metals in thenriver-bed and river-side sediments that are a complex function ofncontamination history, local hydrogeological and chemical properties,nand metal-specific chemistry. In the river-bed sediments, the concentrationsnof all the metals first increased and then decreased with depth, reflectingnthe histories of metal-containing wastewater discharges and sedimentationnof metal-containing particles in river water. In the river-side sediments,nthe concentrations of As, Cd, Co, and Pb were higher in finer grainnmaterials, while those of Cr, Cu, Ni, and Zn were higher in coarsernmaterials, reflecting the combined effects of stronger sorption capacitynin finer materials and preferential water flow in coarser materialsnthat carried metals from contaminated river. Speciation analysis indicatednthat Cd was mainly controlled by surface complexation, Cu was mainlyncontrolled in complexation with organics, and other metals dominantlynassociated with iron-oxide and structural fractions with a highernstructural fraction in the river-side sediments. Risk analysis indicatednthat release potentials were metal-specific, following an order ofnCd > Cu > Ni > Cr > Co > Zn > As > Pb. The resultsnhave a strong implication for understanding heavy-metal distributionnand accumulation in GRIZ sediments and for the management of contaminatednsediments during and after watershed restoration.","PeriodicalId":523790,"journal":{"name":"Figshare","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147921987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}