Batch Removal of Crystal Violet from Aqueous Solution by H2SO4Modified Sugarcane Bagasse: Equilibrium, Kinetic, and Thermodynamic Profile

2012 ◽  
Vol 47 (13) ◽  
pp. 1898-1905 ◽  
Author(s):  
Sagnik Chakraborty ◽  
Shamik Chowdhury ◽  
Papita Das Saha
2017 ◽  
Vol 494 ◽  
pp. 223-241 ◽  
Author(s):  
Luide Rodrigo Martins ◽  
Josilene Aparecida Vieira Rodrigues ◽  
Oscar Fernando Herrera Adarme ◽  
Tânia Márcia Sacramento Melo ◽  
Leandro Vinícius Alves Gurgel ◽  
...  

2012 ◽  
Vol 2 (1) ◽  
pp. 55-65 ◽  
Author(s):  
Sagnik Chakraborty ◽  
Shamik Chowdhury ◽  
Papita Das Saha

The adsorption of crystal violet (CV) from aqueous solution by sugarcane bagasse (SCB), an agro-industrial residue, was investigated in a batch experimental setup. A two level four factor (24) full factorial central composite design (CCD) with the help of Design Expert Version 7.1.6 (Stat-Ease, USA) was used for adsorption process optimization and evaluation of interaction effects of different operating parameters: agitation speed (80–180 rpm), initial solution pH (4.0–8.0), initial dye concentration (100–200 mg L–1), and adsorbent dose (2–5 g L–1). A multiple coefficient of determination (R2) value of 0.98, model F value of 266.36 and its low P-value (<0.0001) along with lower value of coefficient of variation (2.70%) indicated the fitness of the response surface quadratic model developed during the present study. Numerical optimization applying desirability function was used to identify the optimum conditions for maximum removal of CV. The optimum conditions were found to be agitation speed = 165 rpm, initial solution pH = 8.0, initial dye concentration = 200 mg L–1 and adsorbent dose = 2.0 g L–1. A confirmatory experiment was performed to evaluate the accuracy of the optimization procedure and maximum CV removal of 93.21% was achieved under the optimized conditions.


2015 ◽  
Vol 65 ◽  
pp. 521-534 ◽  
Author(s):  
Bruno Christiano Silva Ferreira ◽  
Filipe Simões Teodoro ◽  
Aparecida Barbosa Mageste ◽  
Laurent Frédéric Gil ◽  
Rossimiriam Pereira de Freitas ◽  
...  

2018 ◽  
Vol 38 ◽  
pp. 29-38
Author(s):  
Puspa Lal Homagai ◽  
Namita Bhandari ◽  
Sahira Joshi

Available with full text.


2020 ◽  
Author(s):  
Alusani Manyatshe ◽  
Mohammed O. Balogun ◽  
Thabo T. I. Nkambule ◽  
Zamani E. D. Cele ◽  
Titus A. M. Msagati

2019 ◽  
Vol 7 (2) ◽  
pp. 240-246
Author(s):  
Kaur Harpreet ◽  
Kaur Harpreet ◽  
Vandana Kamboj ◽  
Vandana Kamboj

Water is the most crucial thing to mankind and so its contamination by various agencies is posing a threat to the natural balance. So, in the present work, the efficiency of various adsorbents derived from plant waste, to remove different dyes from aqueous solution was evaluated. Parameters for study were contact time, concentration and pH. Various combinations of plant ashes were used for the study. It was found that adsorbent prepared from the combination of orange peels, pomegranate and banana peels ashes, exhibited good adsorption capacity for methylene blue, congo red and crystal violet. All these dyes were completely removed from the aqueous solution while methyl orange was not removed. Congo red was removed completely within 40 min of contact with the adsorbent while methyl orange took 3 hrs to be removed to the extent of 48% only. The adsorption coefficient of congo red was found to be 2.33 while value for methylene blue and crystal violet was 1 and 1.66 respectively. The characterization of adsorbent was done by Scanning Electron Microscopy and IR spectroscopy. SEM image revealed the surface of adsorbent to be made of differential pores. From the results it became evident that the low-cost adsorbent could be used as a replacement for costly traditional methods of removing colorants from water.


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