Extraction of heavy metals from contaminated soil by Cinnamomum camphora
Journal
Ecotoxicology
Journal Volume
23
Journal Issue
10
Pages
1987-1995
Date Issued
2014
Author(s)
Abstract
83 acres of rice paddy fields in Taoyuan county, Taiwan, were polluted by cadmium (Cd), chromium (Cr) and copper (Cu) through a nearby irrigation channel, and rice plantation was ceased in 1987. Camphor trees (Cinnamomum camphora) have been planted in 2 acre of the above fields since 1991. Heavy metal accumulation of roots, leaves, branches and heartwood of camphor trees were analyzed during 20-year afforestation. Averaged Cd contents of the roots were found larger than the ones of the branches, leaves, sapwood and heartwood of camphor trees growing in three polluted plots. Averaged diameters at breast height (DBH) of the planted camphor trees were 13–15 cm. Cd pollution did not significantly impact the growth of camphor trees, as similar DBH’s were found from both polluted and control sites. Annual growths of DBH were from 0.63 to 0.77 cm year−1. Planting camphor trees sequestered 68.8 ton biomass per acre. During 20-year period, 0.69–1.98 ton C year−1 ha−1 were sequestered on three polluted plots. The above numbers exceeded IPCC LULUCF reference values 0.31–0.53 ton C year−1 ha−1 for activities at forest lands. © 2014, Springer Science+Business Media New York.
Other Subjects
cadmium; chromium; copper; heavy metal; soil; soil pollutant; afforestation; bioremediation; cadmium; evergreen tree; heavy metal; paddy field; soil pollution; soil quality; afforestation; Article; biomass; cation exchange; Cinnamomum camphora; concentration (parameters); controlled study; diameters at breast height; heartwood; metal extraction; metal metabolism; nonhuman; plant growth; plant leaf; plant root; sapwood; sediment; soil acidity; soil pollution; weedland; analysis; bioremediation; chemistry; Cinnamomum camphora; metabolism; physiology; soil; soil pollutant; Taiwan; Taiwan; Taoyuan [Taiwan]; Cinnamomum camphora; Biodegradation, Environmental; Cinnamomum camphora; Metals, Heavy; Soil; Soil Pollutants; Taiwan
Type
journal article