Your browser doesn't support javascript.
loading
Assess long-term As, Pb and Cr contamination and uptake by Eriocaulon decangulare in the Apalachicola National Forest.
Wu, Yudi; Qi, Lin; Wang, Boya; Medley, Paul; Drake, Jason; Vernon, Jordan; Ibeanusi, Victor; Chen, Gang.
Afiliação
  • Wu Y; College of Engineering and Applied Sciences, University at Albany, State University of New York, Albany, NY 12222, United States of America. Electronic address: ywu21@albany.edu.
  • Qi L; Department of Civil and Environmental Engineering, FAMU-FSU College of Engineering, Tallahassee, FL 32310, United States of America.
  • Wang B; Department of Civil and Environmental Engineering, FAMU-FSU College of Engineering, Tallahassee, FL 32310, United States of America.
  • Medley P; Center for Spatial Ecology and Restoration, Florida A&M University, Tallahassee, FL 32306, United States of America.
  • Drake J; Center for Spatial Ecology and Restoration, Florida A&M University, Tallahassee, FL 32306, United States of America.
  • Vernon J; Center for Spatial Ecology and Restoration, Florida A&M University, Tallahassee, FL 32306, United States of America.
  • Ibeanusi V; Center for Spatial Ecology and Restoration, Florida A&M University, Tallahassee, FL 32306, United States of America.
  • Chen G; Department of Civil and Environmental Engineering, FAMU-FSU College of Engineering, Tallahassee, FL 32310, United States of America.
Sci Total Environ ; 838(Pt 1): 156040, 2022 Sep 10.
Article em En | MEDLINE | ID: mdl-35597343
ABSTRACT
Phytoremediation is an effective remediation process for heavy metal contamination. The primary zone of phytoremediation is the rhizosphere where the plants uptake the heavy metals from the soil matrix. The bioavailability of the contaminants in the rhizosphere is affected by the physical, chemical, and biological conditions of the rhizosphere. In the study area of the Apalachicola National Forest, the concentrations of As, Pb and Cr in the bulk soil (n = 20) were 515.81, 220.77, and 2.02 mg/kg soil, respectively. Using a sequential extraction method, the bioavailability of heavy metals in the bulk soil (S-NR) and rhizosphere soil (S-R) was characterized. The results showed that the bioavailability of the three heavy metals had the order of Cr > Pb > As for S-NR and Pb > As > Cr for S-R. The bioavailability of these metals was affected by the nature of the heavy metals and the soil physicochemical properties. Native plant Eriocaulon decangulare could uptake a large number of heavy metals from the natural soil, demonstrating great phytoremediation potential for metal contamination. Energy Dispersive Spectroscopy (EDS) mapping successfully located the dominant accumulation of heavy metals in aerial parts of E. decangulare. E. decangulare was also found to be highly selective and Pb and As were both extensively accumulated in the shoots and roots. Cr was significantly immobilized in the rhizosphere soil, and also accumulated in the root of E. decangulare. This study not only correlated the phytoremediation potential with heavy metal bioavailability and soil physicochemical properties, but also demonstrated the important role of the nature of heavy metals played during the phytoremediation.
Assuntos
Palavras-chave

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Poluentes do Solo / Metais Pesados Idioma: En Revista: Sci Total Environ Ano de publicação: 2022 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Poluentes do Solo / Metais Pesados Idioma: En Revista: Sci Total Environ Ano de publicação: 2022 Tipo de documento: Article