Abstract:
:A pot experiment was conducted to investigate the effect of three additives - citric acid (CA), polyaspartic acid (PASP), and FeCl3 - on the phytoextraction efficiency of cadmium (Cd) and lead (Pb) by ryegrass (Lolium perenneL.) from artificially contaminated soils with different heavy metal concentrations. The results showed that as the concentration of pollutants increased, the TI (tolerance index) and BCF (bio-concentration factor) of ryegrass gradually increased only when FeCl3 was applied. FeCl3 also exhibited the most significant biomass enhancement and heavy metal accumulation of ryegrass, as well as the highest phytoextraction efficiency in heavily-polluted soils. The overall orders of the optimal phytoextraction efficiency for the three additives in terms of their MER (metal extraction ratio) were: FeCl3 > PASP > CA. Therefore, FeCl3 can be used to improve the Cd and Pb phytoextraction efficiency of ryegrass in heavily-polluted soils.
journal_name
Bull Environ Contam Toxicoljournal_title
Bulletin of environmental contamination and toxicologyauthors
Zhang Y,Li F,Xu W,Ren J,Chen S,Shen K,Long Zdoi
10.1007/s00128-019-02661-7subject
Has Abstractpub_date
2019-07-01 00:00:00pages
147-154issue
1eissn
0007-4861issn
1432-0800pii
10.1007/s00128-019-02661-7journal_volume
103pub_type
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