Novel Carbon-Based Nanoadsorbents for Removal of Synthetic Textile Dyes from Wastewaters - Green Chemistry for Dyes Removal from Wastewater - page 62

Table 2.3 ( Cont .)

Adsorbent Target dye Conc. pH Temp.

(K)

Contact
time (h)

Adsorption
capacity

Isotherm Kinetic

model

hermodynamics Ref.

Graphene/
Magnetite

Methylene
Blue

10-25 mg L -1 — 298 — 43.82 mg g -1 Langmuir Pseudo-

second-
order

Endothermic [126]

Magnetite@
Graphene

Congo Red — — 298 ± 052 — 33.66 mg g -1 Langmuir Pseudo-

second-
order

— [127]

Magnetite@
Graphene

Methylene
Blue

— — 298 ± 0.5 — 45.27 mg g -1 Langmuir Pseudo-

second-
order

— [127]

Graphene/
Fe 3 O 4

Pararosaniline 20-60 mg L -1 6.6 ± 0.2 298 1 198.23 mg g -1 Langmuir,

Freundlich

Pseudo-
second-
order

— [128]

Graphene-
SO 3 H/Fe 3 O 4

Safranine T 20-250 mg L -1 6.0 Room

temp.

— 199.3 mg g -1 Langmuir Pseudo-

second-
order

— [129]

Graphene-
SO 3 H/Fe 3 O 4

Neutral Red 20-250 mg L -1 6.0 Room temp. — 216.8 mg g -1 Langmuir Pseudo-

second-
order

— [129]

Graphene-
SO 3 H/Fe 3 O 4

Victoria Blue 20-250 mg L -1 6.0 Room temp. — 200.6 mg g -1 Langmuir Pseudo-

second-
order

— [129]

CoFe 2 O 4 -
Functionalized
graphene

Methyl
Orange

10 mg L -1 — — — 71.54 mg g -1 — Pseudo-

second-
order

— [130]