(Mean ± S.D.) Arsenic con. mg/L               Days   3 9 15                           Shoot (mg/kg) 0.010 1.42 ± 0.04 1.61 ± 0.03 1.74 ± 0.12 0.025 3.05 ± 0.08 4.47 ± 0.11 5.47 ± 0.06 0.050 9.58 ± 0.13 10.21 ± 0.06 13.21 ± 0.22 0.10 19.53 ± 0.24 21.3 ± 0.28 32.1 ± 0.05                             Root (mg/kg) 0.010 0.43 ± 0.02 0.46 ± 0.01 0.52 ± 0.03 0.025 1.11± 0.05 1.25 ± 0.08 1.32 ± 0.05 0.05 1.82 ± 0.11 2.52 ± 0.04 3.18 ± 0.14 0.10 4.21 ± 0.15 5.62 ± 0.02 7.20 ± 0.12 S.D. = Standard deviation The standard deviation has been obtained for n=3

Table 3: The accumulation of total arsenic (As) at pH 6.8 in shoots and roots stems E. crassipes at different arsenic ions concentrations and exposure times.