Effectiveness of beetroot seeds and H3PO4 activated beetroot seeds for the removal of dyes from aqueous solutions

Raw beetroot seeds (BS) and H3PO4 activated beetroot seeds (H3PO4-BS) were evaluate for their effectiveness in removing methylene blue (MB) and malachite green (MG) from aqueous solution. BS were carbonized at 500°C for 2 h, and then impregnated with phosphoric acid (phosphoric acid to BS ratio of 1...

Full description

Saved in:
Bibliographic Details
Published in:Journal of water reuse and desalination 2018-12, Vol.8 (4), p.522-531
Main Authors: Machrouhi, A., Farnane, M., Elhalil, A., Elmoubarki, R., Abdennouri, M., Qourzal, S., Tounsadi, H., Barka, N.
Format: Article
Language:English
Subjects:
Acids
activated beetroot seeds
Activated carbon
Adsorbents
Adsorption
Aqueous solutions
Batch type furnaces
Chemical engineering
Chemistry
Color removal
Dosage
dye removal
Dyes
Efficiency
Environmental impact
equilibrium
Fourier transforms
Isotherms
Kinetics
Malachite green
Mathematical models
Methylene blue
Organic chemicals
Parameters
pH effects
Phosphoric acid
Removal
Seeds
Solutions
Sorption
Sugar beets
thermodynamics
Uptake
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Raw beetroot seeds (BS) and H3PO4 activated beetroot seeds (H3PO4-BS) were evaluate for their effectiveness in removing methylene blue (MB) and malachite green (MG) from aqueous solution. BS were carbonized at 500°C for 2 h, and then impregnated with phosphoric acid (phosphoric acid to BS ratio of 1.5 g/g). The impregnated BS were activated in a tubular vertical furnace at 450°C for 2 h. Batch sorption experiments were carried out under various parameters, such as solution pH, adsorbent dosage, contact time, initial dyes concentration and temperature. The experimental results show that the dye sorption was influenced by solution pH and it was greater in the basic range. The sorption yield increases with an increase in the adsorbent dosage. The equilibrium uptake was increased with an increase in the initial dye concentration in solution. Adsorption kinetic data conformed more to the pseudo-second-order kinetic model. The experimental isotherm data were evaluated by Langmuir, Freundlich, Toth and Dubinin–Radushkevich isotherm models. The Langmuir maximum monolayer adsorption capacities were 61.11 and 74.37 mg/g for MB, 51.31 and 213.01 mg/g for MG, respectively in the case of BS and H3PO4-BS. The thermodynamic parameters are also evaluated and discussed.
ISSN:2220-1319
2408-9370
DOI:10.2166/wrd.2017.034