Arsenic Remediation in Speciation of Arsenite As(III) and Arsenate As(V) in Submerged Soil by Typha angustifolia L.

Abstract

This study aimed to study total arsenic accumulation of Arsenite [As(III)] and Arsenate [As(V)] forms by T. angustifolia in submerged soil and to compare accumulation efficiency by various organs of T. angustifolia with 15, 30, 45 and 60 days. Experimental design is factorial 3 × 4 in CRD plan. According to analysis of variance (Two way ANOVA) found that the factors affected significantly total arsenic accumulation of T. angustifolia were growing period, arsenic speciation, and co-influence of these two factors (P-value < 0.01). The result of multiple comparison by Dunnett's T3 showed that As (III)> As (V)> Control and 45> 60> 30> 15 days, respectively. The accumulation in various organs of T.angustifolia by factorial 3 × 3 × 4 in CRD plan (Three way ANOVA) found that the factors were significant differences (P - value < 0.01) as follow growing period, arsenic speciation, and various organs, as well as co-influence of these two factors including arsenic speciation * growing period, arsenic speciation * various organs, growing period * various organs, and the other had co-influence of these three factors. Multiple comparison result by Dunnett's T3 showed that As (III) > As (V) > control, 45 > 60 > 30 > 15, and rhizome > root > leaf. Arsenic accumulation translocation factors (AFT) of As (III) treatment were 0.14 - 0.28 and As (V) treatment were 0.43 - 0.55, and Bioconcentration factors (BCF) of As(III) treatment were 0.93 - 1.15. Therefore T.angustifolia was a hyperaccumulation plant for As(III), whereas BCF of As(V) treatment was 0.57 - 0.85.