Effects Of Phosphorus On Arsenic Adsorption In Solis And As-accumulating In Hyperaccumulator Fern

This study consists of two experiments. Adsorption of arsenate(As) and phosphorus (P) were determined in three soils (red soil, yellow soil, drab soil). Accumulation of As and P in hyperaccumulated-As fern were determined under differing concentration P and As in the drab. These results indicate:1.P and As were adsorbed by yellow soil more than red soil. Capacity of adsorbed As and P in drab soil was less than that in the red soil. The adsorbed As increase with increasing content of the clay. As would be less strongly adsorbed at high pH.2.Capacity of adsorbed As decreased with increasing P concentration under different As and P concentration in yellow soil and drab soil. Capacity of adsorbed P decreased with increasing As concentration under differ As and P concentration in the yellow soil and drab soil. Capacity of adsorbed As were greatly affected by P concentration in red soil. Capacity of adsorbed As were enhanced at P:As=l :1.3.Accumulation of As and P were determined in the fern under different content of P and As in the drab soil. Increasing levels of As and P in the soil caused a significant Increasing As and P in the fronds. The effects of As in soil on As concentration in the fronds were statistically significant. The fern could take up large amounts of As into its fronds in 4 months. As concentration in the fern fronds growing in soil spiked with 800mg/kg soil As increased from 675.89mg/kgDW to 4370mg/kgDW...