Cost-Effective and Eco-Friendly Method for Decolorization of Malachite Green …
285
3.3.3 Initial Malachite Green Concentration
From Fig. 3c it was observed that increasing the dye concentration from 30 to 50 mg
L
−1 at fixed alginate concentration of 3.5% reduces the MG removal from 98.6085
to 98.014%. Similarly MG removal decreased from 98.5543 to 97.9649% at fixed
bed height of 15 cm and is shown in Fig. 3d. Experiments by Kavianinia et al. (2012)
suggested that at higher initial concentration, the bed saturation was faster which led
to earlier breakthrough and exhaustion of column biosorbent.
3.3.4 Bed Height
The effect of bed height on dye removal was studied. From Fig. 3e it was observed that
decreasing the bed height from 15 to 10 cm at fixed flow rate of 0.5 ml min
−1 reduces
the MG removal from 98.2785 to 97.6274%. Similarly in Fig. 3f it was observed that
MG removal decreases from 98.4257 to 98.0654% on decreasing the bed height at
fixed alginate concentration. Shadeera and Nagapadma (2015) reported that when
the bed height was increased the adsorbate had more time to be in contact with the
adsorbent which resulted in increased dye removal. Thus the different parameters
optimized for dye removal are bed height 15 cm, flowrate 0.5 ml min
−1 , alginate
concentration 2.5%, and MG concentration 50 mg l
−1 .
4 Conclusion
The present work was designed to study the removal of Malachite green by K. marina
DAGII. Spectrophotometric analysis study showed that the dye removal did not
undergo degradation process and was controlled by sorption process. Optimization
of different parameters was done by RSM to obtain the maximum MG removal.
ANOVA study of column showed the influence of different parameters and their
interactive effect contributing to MG removal. The quadratic model was found to be
significant and adequate which suggests that the model can be used to study the dye
removal process.
Acknowledgements I express my thanks to National Institute of Technology Durgapur, West
Bengal, India for supporting this work.
References
Adhikari S, Chattopadhyay P, Ray L (2012) Continuous Removal of malathion by immobilised
biomass of Bacillus species S 14 using a packed bed column reactor. Chem Speciat Bioavailab
24:167–175
285
3.3.3 Initial Malachite Green Concentration
From Fig. 3c it was observed that increasing the dye concentration from 30 to 50 mg
L
−1 at fixed alginate concentration of 3.5% reduces the MG removal from 98.6085
to 98.014%. Similarly MG removal decreased from 98.5543 to 97.9649% at fixed
bed height of 15 cm and is shown in Fig. 3d. Experiments by Kavianinia et al. (2012)
suggested that at higher initial concentration, the bed saturation was faster which led
to earlier breakthrough and exhaustion of column biosorbent.
3.3.4 Bed Height
The effect of bed height on dye removal was studied. From Fig. 3e it was observed that
decreasing the bed height from 15 to 10 cm at fixed flow rate of 0.5 ml min
−1 reduces
the MG removal from 98.2785 to 97.6274%. Similarly in Fig. 3f it was observed that
MG removal decreases from 98.4257 to 98.0654% on decreasing the bed height at
fixed alginate concentration. Shadeera and Nagapadma (2015) reported that when
the bed height was increased the adsorbate had more time to be in contact with the
adsorbent which resulted in increased dye removal. Thus the different parameters
optimized for dye removal are bed height 15 cm, flowrate 0.5 ml min
−1 , alginate
concentration 2.5%, and MG concentration 50 mg l
−1 .
4 Conclusion
The present work was designed to study the removal of Malachite green by K. marina
DAGII. Spectrophotometric analysis study showed that the dye removal did not
undergo degradation process and was controlled by sorption process. Optimization
of different parameters was done by RSM to obtain the maximum MG removal.
ANOVA study of column showed the influence of different parameters and their
interactive effect contributing to MG removal. The quadratic model was found to be
significant and adequate which suggests that the model can be used to study the dye
removal process.
Acknowledgements I express my thanks to National Institute of Technology Durgapur, West
Bengal, India for supporting this work.
References
Adhikari S, Chattopadhyay P, Ray L (2012) Continuous Removal of malathion by immobilised
biomass of Bacillus species S 14 using a packed bed column reactor. Chem Speciat Bioavailab
24:167–175