Mercury uptake by Paspalum distichum L. in relation to the mercury distribution pattern in rhizosphere soil.
Mercury
Paspalum distichum L
Phytoremediation
Rhizobox
Journal
Environmental science and pollution research international
ISSN: 1614-7499
Titre abrégé: Environ Sci Pollut Res Int
Pays: Germany
ID NLM: 9441769
Informations de publication
Date de publication:
Dec 2021
Dec 2021
Historique:
received:
06
01
2021
accepted:
20
06
2021
pubmed:
11
7
2021
medline:
15
12
2021
entrez:
10
7
2021
Statut:
ppublish
Résumé
Paspalum distichum L. was tested to evaluate their phytoremediation capacity for Hg contaminated soil through analyzing the dissipation of Hg in soil through a greenhouse study by using self-made rhizos box. Original soil samples were collected at Hg mining site with serious Hg contamination and a control site, respectively. Planting of P. distichum. L last for 60 days. Soil and plant samples were collected from four periods (0 d, 20 d, 40 d, and 60 d) and soil samples were collected from five different rhizosphere distance in horizontal direction (0-2 cm, 2-4cm, 4-6cm, 6-8cm, 8-10cm). The results showed that the presence of P. distichum. L significantly accelerated the Hg dissipation in soil compared with control. Hg concentration in the rhizospheric soil was affected by the plant growth period and the distance to the plant roots. The closer of soil to the root of P. distichum. L, the lower mercury concentration in soil. During the 60-day growing period, the concentrations of total Hg (THg) and methylmercury (MeHg) reduced by 45% and 64%, respectively, in the rhizosphere (0-2cm) of Hg contaminated soil. However, MeHg concentration was increased near the roots (0-4 cm) during the initial growing period (0-20 d), which may be attributed to the influence of root exudates. Root is the major part for Hg accumulation in P. distichum. L. The low ratio between Hg concentrations in underground and aboveground tissues indicated that it seemed difficult for Hg translocation from root to shoot. The highest THg (9.71 ± 3.09 μg·g
Identifiants
pubmed: 34244935
doi: 10.1007/s11356-021-15093-w
pii: 10.1007/s11356-021-15093-w
doi:
Substances chimiques
Methylmercury Compounds
0
Soil
0
Soil Pollutants
0
Mercury
FXS1BY2PGL
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
66990-66997Subventions
Organisme : Natural Science Foundation of Zhejiang Province
ID : LY21D030001
Organisme : National Natural Science Foundation of China
ID : 21677131
Informations de copyright
© 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
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