Effect of Arsenic Types in Soil on Growth and Arsenic Accumulation of Pteris multifida

Abstract

Abstract - This study was carried out to analyze the effect of arsenic types on growth and arsenic accumulation ability of Pterismultifida. Among arsenic pollution sources, Sodium arsenate, Calcium arsenate, Sodium arsenite and Potassium arsenitewere treated in horticultural compost contaminated with 500 ㎎·kg-1. P. multifida was cultivated for 12 weeks. The resultsof study, Calcium arsenate treatment showed slightly decreased growth of P. multifida. But, growth of P. multifida cultivatedin the remaining arsenic treatment was similar to untreated control plot. With only short-term cultivation of 4 weeks, aerial partof P. multifida in Sodium arsenate treatment showed high arsenic accumulation of 2,289.5 ㎎·kg-1 DW. The arsenic accumulation(2,956.0 ㎎·kg-1 DW) was the highest at 12 week. On the other hand, underground part showed the highest arsenicaccumulation in Potassium arsenite treatment (2,470.2 ㎎·kg-1 DW) and Calcium arsenate treatment accumulated 1,060.7 ㎎·kg-1DW of arsenic. Regardless of arsenic types, aerial part of P. multifida was absorbed more than 1000 ㎎·kg-1 DW of arsenic. And removal of arsenic in soil was also higher. Therefore, Pteris multida is considered to be suitable phytoremediationmeterial of various arsenic contaminated areas. Key words - Sodium arsenate, Calcium arsenate, Sodium arsenite, Potassium arsenite