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<strong>Biosorption potential of Gracillaria corticata in the sequestration of malachite green from aqueous solutions</strong>

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Title Statement <strong>Biosorption potential of Gracillaria corticata in the sequestration of malachite green from aqueous solutions</strong>
 
Added Entry - Uncontrolled Name V, SIVASUBRAMANIAN ; NIT CALICUT
 
Uncontrolled Index Term Biosorption; Algae; Dye; Malachite Green; Biomass; Wastewater; Modeling
 
Summary, etc. <em>Gracillaria corticata</em>, a red alga, has been tested for its ability to remove malachite green (MG) from aqueous phase. The surface morphology of <em>G. corticata</em> is studied using Scanning Electron Microscopy (SEM). The analytical evidence from FTIR spectra confirms the involvement of amine group in the biosorption of malachite green. The effects of biosorbent concentration, initial <em>p</em>H, temperature, adsorption time and initial dye concentration are studied for the biosorption of MG using <em>G. corticata</em>. At various initial MG concentrations (20 - 100 mg/L), batch sorption equilibriumhave been attained within 1 h. However the equilibrium is slow as the time progresses. Kinetics of MG biosorptionhas beenanalyzed using pseudo second order model. The experimental data is also analyzed using Langmuir, Freundlich and Temkin isotherm models. Out of which, Langmuir model describes the isotherm data with high coefficient of determination (R<sup>2</sup> = 0.996). So, based on Langmuir model the maximum dye uptake of 76.92 mg/g is reported at <em>p</em>H 10.0 and temperature 303K. Different thermodynamic parameters such as ΔH<sup> °</sup>, ΔG<sup>°</sup>, ΔS<sup>°</sup> are evaluated and it is found that the present system is spontaneous, endothermic and increased randomness in nature. Thus, the investigation has proved <em>Gracillaria</em> biomass to be an effective low cost, eco-friendly biosorbent for the treatment of dye-bearing wastewater.
 
Publication, Distribution, Etc. Indian Journal of Chemical Technology (IJCT)
2018-07-05 10:41:26
 
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http://op.niscair.res.in/index.php/IJCT/article/view/11747
 
Data Source Entry Indian Journal of Chemical Technology (IJCT); ##issue.vol## 24, ##issue.no## 5 (2017): Indian Journal of Chemical Technology
 
Language Note en