Facile preparation of magnetic nano-Fe3O4 modified powdered coconut shell biochar for COD deep removal in oil field produced water

被引：1
作者：
Li, Tao [1 ,2 ]
Gao, Chen [1 ]
Yang, Tianlei [1 ]
Guan, Yueping [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
[2] Sichuan Adv Mat Ind Investment Grp Co LTD, Chengdu 610095, Sichuan, Peoples R China
来源：
CHEMICAL PHYSICS LETTERS | 2024年 / 856卷
关键词：
Magnetic coconut shell biochar; Magnetic separation; Oil field produced water; COD removal; Magnetic Fe3O4; MECHANISM; BEHAVIOR;
D O I：
10.1016/j.cplett.2024.141612
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The oilfield produced water (PW) treated by traditional process difficult to reduce the chemical oxygen demand COD value to below 50 mg/L. In this work, magnetic nano-Fe3O4 modified powdered coconut shell biochar was successfully prepared. The COD value of the PW was reduced from an initial value of 387 mg/L to 37 mg/L in 10 min of low speed mixing using magnetic nano-Fe3O4 modified powdered coconut shell biochar. In addition, the spent magnetic nano-Fe3O4 modified powdered coconut shell biochar can be regenerated by heating at 240 degrees C for 20 min. The regenerated magnetic nano-Fe3O4 modified powdered coconut shell biochar showed excellent adsorption properties, and the COD value of the PW was reduced to about 35 mg/L in all six recycles.
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页数：8
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