중금속 오염 토양에서 양치식물 12종의 중금속 축적능 탐색

Screening for Heavy Metals Accumulation Ability of Twelve Pteridophyta Species at Soil Contaminated with Heavy Metals

This study was performed to select the effective plant for phytoremediation of heavy metal contaminated areas. After cultivation of twelve Pteridophyta species on soil contaminated with heavy metals for 8 weeks, the growth response and accumulation ability of each parts for heavy metal, such as arsenic(As), cadmium(Cd), copper(Cu), lead(Pb), and zinc(Zn) were analyzed. Except Adiantum capillus-veneris, growth of eleven Pteridophyta species were relatively fine. Arsenic accumulation ability was the highest by Pteris multifida(66.9 mgㆍkg⁻¹ DW) and P. vitata(62.2 mgㆍkg⁻¹ DW) in aerial part, and P. vitata(13.6 mgㆍkg⁻¹ DW) in underground part. On the other hand, cadmium accumulation ability was low in all the twelve species of Pteridophyta. The underground part of P. ensiformis showed the highest copper accumulation(44.4 mgㆍkg⁻¹ DW) and in case of aerial part, Adiantum capillus-veneris(26.8 mgㆍkg⁻¹ DW) was highest in copper content. In lead, 1.2(Athyrium yokoscens) ~ 8.8 mgㆍkg⁻¹ DW(Pteris multifida) were accumulated in aerial part among twelve Pteridophyta species and 1.2(Pteris ensiformis) ~ 10.3 mgㆍkg⁻¹ DW(P. dispar) in the underground part. The aerial part of Thelypteris viridifrons showed the highest zinc accumulation(96.8 mgㆍkg⁻¹ DW) and in case of underground part, Pteris multifida(63.6 mgㆍkg⁻¹ DW) showed the highest ability.