Evaluation of Red Marine AlgaKappaphycus alvareziias Biosorbent for Methylene Blue: Isotherm, Kinetic, and Mechanism Studies

Abstract

In this work, non-living red seaweed (Kappaphycus alvarezii) biomass was investigated as a new biosorbent of methylene blue from aqueous solution. The effect of operational parameters such as equilibrium pH, agitation time, initial dye concentrations and biosorbent dosage on the biosorption capacity of Kappaphycus alvarezii was studied. The equilibrium solution pH was found to profoundly affected methylene blue sorption capacity of Kappaphycus alvarezii with pH 8 found to be optimum. Evidence from Fourier-transform infrared spectroscopy and scanning electron microscopy pictures confirmed the dye biosorption mechanism as electrostatic interaction between the negatively charged seaweed surface and positively charged methylene blue. Biosorption isotherms indicated that Kappaphycus alvarezii exhibited methylene blue uptake of 74.4 mg/g, according to the Langmuir model. The equilibrium isotherm data were evaluated using the Freundlich, Langmuir, Redlich-Peterson and Toth models. Kinetic studies revealed that methylene blue uptake was fast with 97% or more of the uptake occurred within 60 Downloaded by [University of Cincinnati Libraries] at 21:26 03 January 2015A c c e p t e d M a n u s c r i p t 2 min of contact time. The pseudo first and second order models were applied to describe kinetic data, of which the pseudo-first order described experimental data better with high correlation coefficient and low percentage of error values.

Degradation of methylene blue using double-chamber dielectric barrier discharge reactor under different carrier gases

“…One particular pollutant, water-soluble organic compounds, has proven difficult to remove from water by traditional methods (Huang, 2010;Singh, 2004;Aboulhassan, 2006;Salmiati, 2007;Vijayaraghavan, 2015). Recently, the advanced oxidation processes (AOPs), based on the in-situ generation of hydroxyl radicals (·OH), have been investigated extensively for the removal of aqueous organics (Nishiyama, 2015;Zeng, 2015).…”

Valorization of Marine Waste: Use of Industrial By-Products and Beach Wrack Towards the Production of High Added-Value Products

“…Biomass from marine macroalgae and seagrasses can be obtained in large quantities at a low price, provided that their harvesting is sustainable and does not affect the ecosystem balance in coastal areas. Different species of marine algae have been used to remove various metal ions, colorants (dyes) and other pollutants from water (Sheng et al, 2007;Bhatnagar et al, 2012;Aytas et al, 2014;Navarro et al, 2014;Rathod et al, 2014;Vijayaraghavan et al, 2015;Jerold and Sivasubramanian, 2016;Ungureanu et al, 2016;Mokhtar et al, 2017;Vigneshpriya et al, 2017;Arumugam et al, 2018;Kishore Kumar et al, 2018;Silva et al, 2019;Bouzikri et al, 2020; Coração et al, 2020;Fabre et al, 2020;Safarik et al, 2020a,b;Shobier et al, 2020; Table 1). Also, waste macroalgae biomass obtained after selected industrial processes can be employed for the same purposes (Safarik et al, 2018;Santos et al, 2018).…”

Exploring the Biosorption of Methylene Blue Dye onto Agricultural Products: A Critical Review

“…Water hyacinth compost was utilized to study biosorption; efficient microorganisms were used to create this compost and to use biosorption to get rid of basic dyes [47]. An evaluation of the red marine alga AlgaKappaphycus alvareziias as a biosorbent for MB biosorption was reported in [48]. A study of the biosorption of MB onto Gracilaria corticata, a red seaweed, can be found in [49].…”