1
st
order
2
nd
order
R
2
a
k
l
a
R
2
a
k
2
a
h
0.9878
2.34x10
-2
0.3578
3.055
0.64
R
2
b
k
l
b
R
2
b
k
2
b
h
0.9979
8.22x10
-2
0.3204
1.37x10
-3
2.88
Table 2:
R
2
values and rate constants for 500 mg L
-1
Cr(III) concentration.
