Journal
BIORESOURCE TECHNOLOGY
Volume 344, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.126186
Keywords
Biochar; Lignin; Methylene blue; Selective adsorption; Wastewater
Funding
- National Key Research and Development Program of China [2020YFC1808300, 2020YFC1808304]
- Shaanxi Natural Science Fund [2021SF-503, 2020ZDLGY13-08]
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A novel Fe-modified lignin-based biochar (Fe-LB) was successfully fabricated for methylene blue (MB) removal, demonstrating high specific surface area and micropore volume compared to traditional LB. Fe-LB exhibited quick adsorption of MB with a maximum adsorption capacity of 2.7-fold higher than LB, achieving 100% removal efficiency in 15 minutes. Furthermore, Fe-LB showed selective adsorption preference for MB in a wide pH range and high salt environments, making it a promising candidate for dye wastewater treatment.
A novel Fe-modified lignin-based biochar (Fe-LB) was fabricated via a facile one-step carbonization method for methylene blue (MB) removal from wastewater. Fe-LB exhibited a high specific surface area (885.97 m2/g) and micropore volume (0.3203 m3/g), and demonstrated high affinity for MB with the maximum adsorption capacity of 2.7-fold by Fe-LB than LB. It was found that quick adsorption could be achieved in 15 min with the MB removal efficiency of 100% and adsorption capacity reached 200 mg/g. Selective adsorption studies indicated that Fe-LB preferentially adsorbed MB in high salt and multiple dye systems (binary, ternary, and quaternary) over a wide pH range from 2 to 12. The removal efficiency of CR was greatly improved due to the synergistic effect between MB and CR in the binary system. This work demonstrated that Fe-LB can effectively remove dye contaminants and possessed great potential in the treatment of MB polluted dye wastewater.
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