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

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 Fe3O4 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.

Publication name

 Environmental Science And Pollution Research, DOI 10.1007/s11356-022-24900-x, Early Access DEC 2022

Author(s)

 Jiang, Xuelei; Jia, Yuyao; Ren, Dezhang; Zhang, Nahui; Peng, Tao; Huo, Zhibao

Corresponding author(s) 

 Huo, Zhibao
 zbhuo@shou.edu.cn
 Shanghai Ocean Univ, Coll Marine Ecol & Environm, 999 Huchenghuan Rd, Shanghai 201306, Peoples R China

Author(s) from IGCAS   Peng, Tao

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