218
R. Sivaranjanee and P. Senthil Kumar
Table 1
(continued)
Biosorbent
Adsorbate
Adsorption kinetics fit Isothermal
fit
Sorption
capacity
(mg/g)
Dose (g/L)
pH
Time (min)
Initial conc
(mg/L)
Refs.
Peanut shell biochar Methylene
blue
Pseudo-second-order
Langmuir
isotherm
208
–
2–10
–
100–500
[29]
Arjun fruit biochar
Congo red
Pseudo-second-order
Langmuir
isotherm
4.81
12
7
30–480
20–100
[30]
Cassava slag biochar Rhodamine
B
Pseudo-second-order
Freundlich
isotherm
105.3
4
2–12
–
–
[7]
Strychnos potatorum
seeds
Methylene
blue
Pseudo-second-order
Langmuir
isotherm
78.84
3
–
60
50–250
[31]
Orange peel
Methylene
blue
Pseudo-second-order
Freundlich
isotherm
–
4
8
45
50
[32]
Tamarind seeds
Methylene
blue
Pseudo-second-order
Langmuir
isotherm
16.611
34.483
6
8
120
25–125
[33]
Cashew nut shell
Methylene
blue
Pseudo-second-order
Freundlich
isotherm
5.311
5–30
2–10
10–90
20–100
[34]
Corn cob
Methylene
blue
Pseudo-first-order
Freundlich
isotherm
82.71
8
7
90
25
[5]
Saw dust
Methylene
blue
Pseudo-second-order
Freundlich
isotherm
58.14
3
3–9
90
25
[2]