DOI: 10.1016/j.ecoenv.2019.109897
论文题名: Comparative study of the effects of different chelating ligands on the absorption and transport of mercury in maize (Zea mays L.)
作者: Li Y. ; Guan J. ; Zhao J. ; Li B. ; Li Y.-F. ; Gao Y.
刊名: Ecotoxicology and Environmental Safety
ISSN: 1476513
出版年: 2020
卷: 188 语种: 英语
英文关键词: Absorption
; Chelating ligands
; Maize
; Mercury
; Transport
Scopus关键词: ammonia
; edetic acid
; iodide
; mercury
; thiocyanate
; thiosulfate
; thiourea
; absorption
; bioaccumulation
; bioavailability
; chelating agent
; comparative study
; concentration (composition)
; immobilization
; ligand
; maize
; mercury (element)
; phytoremediation
; pollutant transport
; absorption
; aerial plant part
; Article
; bioaccumulation
; biomass
; comparative study
; controlled study
; maize
; nonhuman
; phytoremediation
; phytotoxicity
; plant parameters
; pollution transport
; root length
; seedling
; shoot
; soil pollution
; translocation factor
; Zea mays
英文摘要: Mercury (Hg) pollution seriously threatens food safety and has attracted global attention. Phytoextraction, due to its low cost, applicability, and environmental friendliness, is considered a new technology for clean-up of heavy metal contamination in the environment. However, the low bioavailability of Hg in polluted areas greatly limits the applicability of phytoextraction. Here, we compared the effects of six common chelating ligands on the absorption and transport of Hg in maize (Zea mays L.), which has a high biomass and short growth cycle. The results showed that the root length and biomass of maize seedlings of the groups treated with the six chelating ligands (EDTA, iodide, ammonium, thiosulfate, thiocyanate, and thiocarbamide) did not change compared with those of the non-treated groups. Co-exposure to Hg and each chelating ligand markedly alleviated the inhibitory effect induced by Hg. Iodide treatment resulted in the lowest root Hg content and highest translocation factor (TF) value, while ammonium treatment gave rise to the highest shoot Hg concentration and lowest TF. Compared with other chelating ligands, thiosulfate exhibited the maximum alleviation of Hg toxicity and achieved the highest concentration of Hg in the roots and aerial parts. Moreover, the TF and Hg accumulation in the thiosulfate and Hg co-exposed group were much higher than those in the group exposed to Hg alone. This finding suggests that, among these common chelating ligands, thiosulfate compounds have great potential for Hg phytoextraction, while the others can immobilize Hg in polluted areas. © 2019 Elsevier Inc. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159993
Appears in Collections: 气候变化与战略
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作者单位: College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
Recommended Citation:
Li Y.,Guan J.,Zhao J.,et al. Comparative study of the effects of different chelating ligands on the absorption and transport of mercury in maize (Zea mays L.)[J]. Ecotoxicology and Environmental Safety,2020-01-01,188