Mitigation measures for chromium-VI contaminated groundwater – The role of endophytic bacteria in rhizofiltration

This item is provided by the institution :
Technical University of Crete   

Repository :
Institutional Repository Technical University of Crete   

see the original item page
in the repository's web site and access all digital files if the item*



Mitigation measures for chromium-VI contaminated groundwater – The role of endophytic bacteria in rhizofiltration (EN)

Συρανιδου Ευδοκια (EL)
Δημητρουλα Ελενη (EL)
Μανουσακη Ελενη (EL)
Νικολαιδης Νικολαος (EL)
Καρατζας Γιωργος (EL)
Καλογερακης Νικος (EL)
Kalogerakis Nikos (EN)
Manousaki Eleni (EN)
Dimitroula Eleni (EN)
Syranidou Evdokia (EN)
Karatzas Giorgos (EN)
Nikolaidis Nikolaos (EN)

Πολυτεχνείο Κρήτης (EL)
Technical University of Crete (EN)

journalArticle

2015


A constructed wetland pilot with Juncus acutus L. plants was investigated for its rhizofiltration efficiency in treating Cr(VI)-contaminated groundwater. Measurements of Cr(VI) and total Cr were performed to estimate the rate of removal. In addition, Cr concentration in plant tissues was measured and the role of endophytic bacteria on plant's tolerance to Cr(VI) toxicity was investigated. The results support that J. acutus is able to rhizofiltrate Cr(VI) from contaminated water with up to 140 μg/L while Cr content analysis in plant tissues revealed that the majority of Cr was accumulated by the plants. Moreover, two leaf (Acidovorax sp. strain U3 and Ralstonia sp. strain U36) isolated endophytic bacteria were found to tolerated 100 mg/L Cr(VI) while nine root isolates showed resistance to 500 mg/L Cr(VI). The endophytic bacteria Pseudomonas sp. strain R16 and Ochrobactrum sp. strain R24 were chosen for Cr(VI) reduction assays. All four strains exhibited a strong potential to reduce Cr(VI) to Cr(III) aerobically. Among them Pseudomonas sp. strain R16 was found able to completely reduced 100 mg/L Cr(VI) after 150 h of incubation. These results suggest that J. acutus is an excellent choice for CWs whose function is the removal of Cr(VI) from contaminated groundwater for subsequent use in crop irrigation. (EN)

Groundwater remediation (EN)
Cr(VI) (EN)
Constructed wetland (EN)
Endophytic bacteria (EN)
J. acutus (EN)

Journal of Hazardous Materials (EN)

English

Elsevier (EN)




*Institutions are responsible for keeping their URLs functional (digital file, item page in repository site)