(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.