From Waste to Biosorbent: Removal of Congo Red from Water by Waste Wood Biomass
1
Faculty of Food Technology Osijek, University of Osijek, F. Kuhača 20, 31000 Osijek, Croatia
2
Croatian Forest Research Institute, Cvjetno Naselje 41, 10450 Jastrebarsko, Croatia
*
Author to whom correspondence should be addressed.
Academic Editor: Hans Brix
Water 2021, 13(3), 279; https://doi.org/10.3390/w13030279
Received: 22 December 2020
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Revised: 11 January 2021
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Accepted: 21 January 2021
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Published: 24 January 2021
(This article belongs to the Section Wastewater Treatment and Reuse)
The aim of the study was to screen the waste wood biomass of 10 wood species as biosorbents for synthetic dye Congo Red (CR) removal from water and to single out the most efficient species for further batch biosorption experiments. Euroamerican poplar (EP), the most efficient species achieving 71.8% CR removal and biosorption capacity of 3.3 mg g−1, was characterized by field emission scanning electron microscopy (FE-SEM) and Fourier transform infrared spectroscopy (FTIR). Different factors affecting the biosorption process were investigated: initial biosorbent concentration (1–10 g dm−3), contact time (5–360 min), initial CR concentration (10–100 mg dm−3), and the initial pH (pH = 4–9). The results showed that CR removal efficiency increased with the increase of biosorbent concentration and contact time. Increase of initial CR concentration led to an increase of the biosorption capacity, but also a decrease of CR removal efficiency. The highest CR removal efficiency was achieved at pH = 4, while at pH = 9 a significant decrease was noticed. The percentage of CR removal from synthetic wastewater was 18.6% higher than from model CR solution. The Langmuir model fitted well the biosorption data, with the maximum biosorption capacity of 8 mg g−1. The kinetics data were found to conform to the pseudo-second-order kinetics model.
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Keywords:
biosorption; biosorbent; Congo Red; waste wood biomass; wastewater
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MDPI and ACS Style
Stjepanović, M.; Velić, N.; Galić, A.; Kosović, I.; Jakovljević, T.; Habuda-Stanić, M. From Waste to Biosorbent: Removal of Congo Red from Water by Waste Wood Biomass. Water 2021, 13, 279. https://doi.org/10.3390/w13030279
AMA Style
Stjepanović M, Velić N, Galić A, Kosović I, Jakovljević T, Habuda-Stanić M. From Waste to Biosorbent: Removal of Congo Red from Water by Waste Wood Biomass. Water. 2021; 13(3):279. https://doi.org/10.3390/w13030279
Chicago/Turabian StyleStjepanović, Marija, Natalija Velić, Antonela Galić, Indira Kosović, Tamara Jakovljević, and Mirna Habuda-Stanić. 2021. "From Waste to Biosorbent: Removal of Congo Red from Water by Waste Wood Biomass" Water 13, no. 3: 279. https://doi.org/10.3390/w13030279
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