Effective removal of methylene blue from aqueous solution using a new magnetic iron oxide nanosorbent prepared by combustion synthesis

The use of biochar in the horticulture and crop fields is a recent method to improve soil fertility due to its porous features and rich nutrients. In the present study, dairy manure (DM) was used as a biomass precursor in the preparation of highly porous biochar (DM-BC) produced at specific conditions. Based on N2 adsorption-desorption isotherms and scanning electron microscopy (SEM) observations, the resulting biochar featured its microporous/mesoporous textures with a BET surface area of about 300 m2/g and total pore volume of 0.185 cm3/g, which could be a low-cost biosorbent for the effective removal of methylene blue (MB) from the aqueous solution. As observed by the energy dispersive X-ray spectroscopy (EDS), the primary inorganic nutrients on the surface of DM-BC included calcium (Ca), magnesium (Mg), potassium (K), phosphorus (P), silicon (Si), sulfur (S), sodium (Na) and aluminum (Al). Furthermore, the resulting biochar was investigated in duplicate for its biosorption performance of cationic compound (i.e., methylene blue, MB) from the aqueous solution with various initial MB concentrations and DM-BC dosages at 25 °C. The findings showed that the biosorption kinetic parameters fitted by the pseudo-second order rate model with high correlations were consistent with its porous features. These experimental results suggested that the porous DM-based biochar could be reused as a biosorbent, biofertilizer, or soil amendments due to the high porosity and the abundance in nutrient minerals.

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Facile preparation of polyacrylamide/chitosan/Fe3O4 composite hydrogels for effective removal of methylene blue from aqueous solution

Carbohydrate Polymers ◽

10.1016/j.carbpol.2020.115882 ◽

2020 ◽

Vol 234 ◽

pp. 115882 ◽

Cited By ~ 11

Author(s):

Cheng Zhang ◽

Yankai Dai ◽

Yinqiu Wu ◽

Guangwei Lu ◽

Zheng Cao ◽

...

Keyword(s):

Aqueous Solution ◽

Methylene Blue ◽

Composite Hydrogels ◽

Effective Removal ◽

Facile Preparation

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Preparation of Iron-Oxide Coated Porous Ceramics Filter and Adsorption and Degradation on Methylene Blue

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.97-101.1285 ◽

2010 ◽

Vol 97-101 ◽

pp. 1285-1289

Author(s):

Fang Wen Li ◽

Hai Wu Jia ◽

Song Jiang Ma ◽

Mei Ling Wu ◽

Xiang Jiang Wu

Keyword(s):

Aqueous Solution ◽

Methylene Blue ◽

Iron Oxide ◽

Porous Ceramics ◽

Dip Coating ◽

Ferric Nitrate ◽

X Ray Diffraction ◽

Average Pore ◽

Prepared Material ◽

And Performance

The aim of the present work is to obtain iron-oxide coated porous ceramics filter (IOCPCF) via dip-coating and test its adsorption and degradation for methylene blue (MB). Porous ceramics filter (PCF) and ferric nitrate were used as substrate and modifier respectively. IOCPCF was characterized by spectrophotometer, X-ray diffraction, scanning electron microscopy, specific analyzer and Fourier transform infrared spectroscopy. The effect of its structure and performance on adsorption and degradation of MB aqueous solution was investigated. The results indicated that the average pore diameter, specific surface area and porosity of IOCPCF were 11.36 nm, 4.987 m2/g and 58.63% respectively. The major crystalline phase of iron coat was α-Fe2O3 which took on porous framework. Using the prepared material, the decoloration conversion for MB aqueous solution can reach 72.06% in 300min and be increased by 21.59% compared with original PCF.

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