Cadmium accumulation and tolerance of mahogany (Swietenia macrophylla) seedlings for phytoextraction applications

in Sciences Citation Index(SCI), 科學引文索引資料庫(SCI)
標題Cadmium accumulation and tolerance of mahogany (Swietenia macrophylla) seedlings for phytoextraction applications
出版類型SCI(Sciences Citation Index)
出版年度2011
AuthorsK. C. Fan, 范貴珠, H.C. Hsi 席行正, Chun-Wei Chen 陳駿瑋, Hong-Lin Lee 李鴻麟, & Hseu 許正一
開始頁2818
頁數4
出版日期2011 / 10
其他編號0000
中文摘要

Mahogany, a high biomass fast-growing tropical tree, has recently garnered considerable interest for
potential use in heavy metal phytoremediation. This study performed hydroponic experiments with Cd
concentration gradients at concentrations of 0, 7.5, 15, and 30 mg L1 to identify Cd accumulation and
tolerance of mahogany (Swietenia macrophylla) seedlings as well as their potential for phytoextraction.
Experimental results indicate that Cd inhibited mahogany seedling growth at the highest Cd exposure
concentration (30 mg L1). Nevertheless, this woody species demonstrated great potential for phytoextraction
at Cd concentrations of 7.5 and 15 mg L1. The roots, twigs, and leaves had extremely large
bioaccumulation factors at 10.3e65.1, indicating that the plant extracted large amounts of Cd from
hydroponic solutions. Mahogany seedlings accumulated up to 154 mg kg1 Cd in twigs at a Cd
concentration of 15 mg L1. Although Cd concentrations in leaves were <100 mg kg1, these concentrations
markedly exceed the normal ranges for other plants. Due to the high biomass production and Cd
uptake capacity of mahogany shoots, this plant is a potential candidate for remediating Cd-contaminated
sites in tropical regions.

期刊名稱Journal of Environmental Management
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