Experimental Study on the Phytoremediation of Manganese Contaminated Soil Using Phytolacca acinosa Roxb
Phytoalcca acinosa Roxb, a perennial and herb, was reported to be a Mn-hyperaccumulator. In this study, P. acinosa was investigated for its potential to remove Mn from the soil in a series of pot experiments. The results showed that P. acinosa had a high extraction capacity for manganese in soil and extracted manganese from soil to the leaves and stems quickly. The average concentration of Mn in leaves was 17,043 mg/kg dry weight (DW) with a maximum of 28,202mg/kg DW. While the average Mn concentration in stems and roots were 3,138 mg / kg DW and 2,189 mg / kg DW respectively, and were less than those in leaves. Amount of Mn extracted by a plant was the highest (13.000 mg/plant) when Mn concentration was 500mg/kg DW in soil. Dynamic experiment indicated the best harvest time for P. acinosa was 60d. The sequential harvests did not significantly affect Mn accumulation and shoot biomass (p > 0.05), however, the stem and leave biomass were changed (p<0.05), indicating that sequential harvest might be an available and convenient way to achieve the decontamination of Mn-contaminated soils by P. acinosa. These results showed that P. acinosa with a high capacity to remove manganese from soil might be a good candidate for remediation of Mn-contaminated soils.
Hexing Li, Qunjie Xu and Daquan Zhang
S. H. You et al., "Experimental Study on the Phytoremediation of Manganese Contaminated Soil Using Phytolacca acinosa Roxb", Advanced Materials Research, Vols. 356-360, pp. 1122-1125, 2012