Mesoporous silica SBA-3 was used to remove 8, Orange G, and brilliant red X-3B,
and adsorption results were compared with calcined and uncalcined silica and later
showed higher absorption capacity for dyes following Freundlich adsorption isotherm model and pseudo-second-order kinetics (Anbia et al. 2010). Mesoporous
SiO 2 nanoparticles modified with SnO 2 quantum dots provided 100% adsorption of
1 in 5 min conforming to Langmuir adsorption isotherm model and pseudo-secondorder kinetics. The q max value of the nanocomposite was reported to be
73.15 mg g
À1 .
The adsorbent was regenerated after being washed with Milli-Q water,
maintaining the adsorption capacity. The environment-friendly nature and reusability established quantum dots/mesoporous silica nanocomposite as potential adsorbent for dyes form wastewater (Dutta et al. 2015). Another study used modified silica
nanoparticles to remove anionic dyes (Patra et al. 2016). Silica fume waste material
modified with laccase from Russulaceae was employed against 10 in a batch process
at an optimal pH 9.0. The adsorption process was following the Langmuir adsorption
isotherm model and showed q max value of 323.0 mg g
À1 with spontaneous and
endothermic system (Kalkan et al. 2014). Quaternary ammonium polyethylenimine
was modified using silica nanoparticle to remove 8. Adsorption kinetics correlated
well to the Langmuir adsorption isotherm model with q max value of 105.4 mg g
À1
(Liu et al. 2013a).
The peat was also used for adsorptive removal of 9 from aqueous solutions
(Chieng et al. 2015). A study on the peat obtained from Panaga, Brunei Darussalam,
to remove 6 from aqueous solution was validated by Redlich-Peterson isotherm
model and kinetics followed pseudo-second-order equation (Chieng et al. 2014).
Similar findings have been confirmed for the adsorption of 7 using yeast peat
following the abovementioned kinetics (Zehra et al. 2016; Chieng et al. 2013).
Chemically modified fabric peat removed 17 A with q max value of 31.40 mg g
À1
and pseudo-second-order kinetics, while Freundlich adsorption isotherm model best
explained the experimental data (Zhou et al. 2011).
The brown peat was tested against Astrazone blue dye, and removal efficiency of
93.0% was achieved by fitting adsorption data to Langmuir adsorption isotherm
model with q max value of 24.0 mg g
À1 , and adsorption followed pseudo-secondorder kinetics (Rusu et al. 2014). The Sphagnum peat moss was employed to adsorb
2 at pH 6.5. Experimental outcomes suited extremely well to the Langmuir adsorption isotherm model, and q max value of 122.0 mg g
À1 at 20
C was reported with
pseud-second-order kinetics with the spontaneous and exothermic system (Hemmati
et al. 2016). Peat was employed to remove p-nitrophenol from aqueous solutions
using batch adsorption experiment. Langmuir adsorption isotherm provided q max
value of 23.4 mg g
À1 and followed pseudo-second-order kinetics (Jaerger et al.
2015).
Surface modifications of alumina were carried out using sodium dodecyl sulfate
for the removal of phenol and showed 90% removal efficiency as was determined
from Langmuir adsorption isotherm model with pseudo-second-order kinetics (Adak
and Pal 2009). In another study, surface modifications of alumina were carried using
sodium dodecyl sulfate and employed to remove 1, 2, and 7 from aqueous solution.
17 Methods for the Treatment of Wastewaters Containing Dyes and Pigments
611
and adsorption results were compared with calcined and uncalcined silica and later
showed higher absorption capacity for dyes following Freundlich adsorption isotherm model and pseudo-second-order kinetics (Anbia et al. 2010). Mesoporous
SiO 2 nanoparticles modified with SnO 2 quantum dots provided 100% adsorption of
1 in 5 min conforming to Langmuir adsorption isotherm model and pseudo-secondorder kinetics. The q max value of the nanocomposite was reported to be
73.15 mg g
À1 .
The adsorbent was regenerated after being washed with Milli-Q water,
maintaining the adsorption capacity. The environment-friendly nature and reusability established quantum dots/mesoporous silica nanocomposite as potential adsorbent for dyes form wastewater (Dutta et al. 2015). Another study used modified silica
nanoparticles to remove anionic dyes (Patra et al. 2016). Silica fume waste material
modified with laccase from Russulaceae was employed against 10 in a batch process
at an optimal pH 9.0. The adsorption process was following the Langmuir adsorption
isotherm model and showed q max value of 323.0 mg g
À1 with spontaneous and
endothermic system (Kalkan et al. 2014). Quaternary ammonium polyethylenimine
was modified using silica nanoparticle to remove 8. Adsorption kinetics correlated
well to the Langmuir adsorption isotherm model with q max value of 105.4 mg g
À1
(Liu et al. 2013a).
The peat was also used for adsorptive removal of 9 from aqueous solutions
(Chieng et al. 2015). A study on the peat obtained from Panaga, Brunei Darussalam,
to remove 6 from aqueous solution was validated by Redlich-Peterson isotherm
model and kinetics followed pseudo-second-order equation (Chieng et al. 2014).
Similar findings have been confirmed for the adsorption of 7 using yeast peat
following the abovementioned kinetics (Zehra et al. 2016; Chieng et al. 2013).
Chemically modified fabric peat removed 17 A with q max value of 31.40 mg g
À1
and pseudo-second-order kinetics, while Freundlich adsorption isotherm model best
explained the experimental data (Zhou et al. 2011).
The brown peat was tested against Astrazone blue dye, and removal efficiency of
93.0% was achieved by fitting adsorption data to Langmuir adsorption isotherm
model with q max value of 24.0 mg g
À1 , and adsorption followed pseudo-secondorder kinetics (Rusu et al. 2014). The Sphagnum peat moss was employed to adsorb
2 at pH 6.5. Experimental outcomes suited extremely well to the Langmuir adsorption isotherm model, and q max value of 122.0 mg g
À1 at 20
C was reported with
pseud-second-order kinetics with the spontaneous and exothermic system (Hemmati
et al. 2016). Peat was employed to remove p-nitrophenol from aqueous solutions
using batch adsorption experiment. Langmuir adsorption isotherm provided q max
value of 23.4 mg g
À1 and followed pseudo-second-order kinetics (Jaerger et al.
2015).
Surface modifications of alumina were carried out using sodium dodecyl sulfate
for the removal of phenol and showed 90% removal efficiency as was determined
from Langmuir adsorption isotherm model with pseudo-second-order kinetics (Adak
and Pal 2009). In another study, surface modifications of alumina were carried using
sodium dodecyl sulfate and employed to remove 1, 2, and 7 from aqueous solution.
17 Methods for the Treatment of Wastewaters Containing Dyes and Pigments
611