In:
Materials Research Express, IOP Publishing, Vol. 10, No. 9 ( 2023-09-01), p. 095504-
Abstract:
Magnetic biochar (MBC) has the advantages including wide source of raw materials and low cost, and has become a potential adsorbent for water treatment, overcoming the shortcomings of biochar (BC) with the hard separation of solid and liquid. Peanut hull-derived magnetic biochar loaded with Fe 3 O 4 (Fe 3 O 4 /BC) was prepared by co-precipitation method. By means of material characterization and batch processing experiments, material properties and environmental factors affecting adsorption performance were investigated. The adsorption mechanism of Fe 3 O 4 /BC on malachite green (MG) was revealed using adsorption isotherms, adsorption kinetics and thermodynamics. The results showed that Fe 3 O 4 particles were uniformly loaded, the total pore volume was increased, surface oxygen-containing functional groups were formed, and the maximum adsorption capacity of the biochar reached 175.4 mg g −1 , 1.6 times of that before modification. In a wide PH range, Fe 3 O 4 /BC showed high adsorption performance for MG, and significant influence from ionic strength wasn’t found. Chemical adsorption was the main adsorption mechanism, including electrostatic interaction, cation exchange, hydrogen bonding and π - π interaction. The study of adsorption mechanism will promote the application of MBC in the removal of organic pollutants from water.
Type of Medium:
Online Resource
ISSN:
2053-1591
DOI:
10.1088/2053-1591/acf756
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2023
detail.hit.zdb_id:
2760382-9
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