Magnetic seeds promoted high-density sulfonic acid-based hydrochar derived from sugar-rich wastewater for removal of methylene blue

Methylene blue (MB) removal from dyeing wastewater using low-cost bio-derived adsorbent is a significant and challenging field. Herein, magnetic sugar hydrochar (MGHC) precursors derived from sugar-rich wastewater with small particle size and rich oxygen-containing functional groups (OCFGs) are prep...

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Bibliographic Details
Published in:Environmental science and pollution research international 2023-03, Vol.30 (13), p.36872-36882
Main Authors: Jiang, Xuelei, Jia, Yuyao, Ren, Dezhang, Zhang, Nahui, Peng, Tao, Huo, Zhibao
Format: Article
Language:English
Subjects:
Adsorption
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Kinetics
Magnetic Phenomena
Methylene Blue - chemistry
Research Article
Sugars
Waste Water Technology
Wastewater
Water Management
Water Pollutants, Chemical - analysis
Water Pollution Control
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Summary:Methylene blue (MB) removal from dyeing wastewater using low-cost bio-derived adsorbent is a significant and challenging field. Herein, magnetic sugar hydrochar (MGHC) precursors derived from sugar-rich wastewater with small particle size and rich oxygen-containing functional groups (OCFGs) are prepared from sugar-rich aqueous solution via Fe salt-modified hydrothermal procedure. The role of Fe 3 O 4 nanoparticles formed during the sugar carbonization is to provide numerous magnetic seeds to generate MGHC with core–shell structure, which reduces the particle size of hydrochar. This increases the amount of OCFGs on the surface of MGHC for bonding the sulfonic acid groups. Therefore, sulfonic acid-modified MGHC-SA shows the rapid MB adsorption rate and excellent adsorption capacity. The highest MB capacity is 869.6 mg/g at pH = 11.0 and 298 K. Additionally, the MGHC-SA can be easily recovery by magnet. And the stability of MGHC-SA was also evaluated, no degradation of adsorption performance was observed, even the adsorbent was regenerated 10 times. This study puts forward a promising way to acquire functional groups rich and easy recovery hydrochar from sugar wastewater for MB removal.
ISSN:1614-7499
1614-7499
DOI:10.1007/s11356-022-24900-x