Adsorption of Lead from Aqueous Solution by Biochar: A Review

Wang, Chuanbin; Wang, Xutong; Li, Ning; Tao, Junyu; Yan, Beibei; Cui, Xiaoqiang; Chen, Guanyi

doi:10.3390/cleantechnol4030039

Cited by 26 publications

(16 citation statements)

References 167 publications

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“…Moreover, the solution loss reaction of coke in the BF may be carried out according to three reaction modes: unreacted core, uniform reaction, and gradient reaction model. [ 10–12 ] Although much research has been carried out on coke in the raceway, there is still a lack of insight about the relevance of coke performance (the reaction characteristics, carbon structure, alkali metal enrichment, etc.) in the different radial location of the lump coke.…”

Section: Introductionmentioning

confidence: 99%

Difference in Radial Direction of Lumpy Coke Sampling from Raceway of Large Blast Furnaces: Microstructure, Alkali Enrichment, and Solution Loss Reaction

She,

Li,

Zou

et al. 2024

steel research int.

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In this article, the morphology, chemical structure, alkali enrichment, and solution loss reactivity in the radial direction of the lumpy feed coke and its corresponding raceway coke from two large blast furnaces are comparatively using multiple characterization methods. The results indicate that the erosion of coke and pore development not only occurs on the surface but also in the center, which can be described as gradient reaction model. The enrichment level of K is higher than Na. K content decreases gradually from the edge to the center of the raceway coke, and the formation of nepheline causes cracks in coke observed by morphology. The crystallite order of the raceway coke is higher than that of the feed coke, with the enrichment of alkali metals, the raceway coke shows variability in the radial direction, and the orderliness gradually decreases from the surface to the interior. With the enrichment of alkali metals, the microcrystalline ordering of the raceway coke decreases from the surface to the interior, and the increase in the concentration of carbon dioxide after the entry into the raceway leads to the preferential reaction of the carbon dioxide with the coke matrix which contains K and many reactive sites.

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Section: Introductionmentioning

confidence: 99%

Difference in Radial Direction of Lumpy Coke Sampling from Raceway of Large Blast Furnaces: Microstructure, Alkali Enrichment, and Solution Loss Reaction

She,

Li,

Zou

et al. 2024

steel research int.

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“…Biochar is a porous carbon-rich solid material that can produced by the heating the biomass in an oxygen-limited environment 40 . Biochar can be prepared by the pyrolysis of agricultural wastes, wood materials, sludge, animal residue, fruit peel, and other wastes 41 . Due to the low-cost, high surface area, and high cation capacity, biochar can be used effectively for the removal of toxic heavy metal ions by adsorption 42 .…”

Section: Introductionmentioning

confidence: 99%

“…Due to the low-cost, high surface area, and high cation capacity, biochar can be used effectively for the removal of toxic heavy metal ions by adsorption 42 . The removal mechanism involves physical adsorption, electrostatic interactions, metal ion-π interactions, and/or complexation 41 , 43 . Biochar is used for the removal of Cr 6+ , As 5+ , Cu 2+ , and Pb 2+ ions 41 .…”

Section: Introductionmentioning

confidence: 99%

A correlation of the adsorption capacity of perovskite/biochar composite with the metal ion characteristics

Ali,

El Mansop,

Galal

et al. 2023

Sci Rep

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LaFeO3/biochar composite is prepared by cellulose-modified microwave-assisted method at 450 °C. The structure is identified by Raman spectrum which, consists of characteristics biochar bands and octahedral perovskite chemical shifts. The morphology is examined by scanning electron microscope (SEM); two phases are observed, rough microporous biochar and orthorhombic perovskite particles. The BET surface area of the composite is 57.63 m2/g. The prepared composite is applied as a sorbent for the removal of Pb2+, Cd2+, and Cu2+ ions from aqueous solutions and wastewater. The adsorption ability reaches a maximum at pH > 6 for Cd2+, and Cu2+ ions, and is pH-independent for Pb2+ ions adsorption. The adsorption follows pseudo 2nd order kinetic model, Langmuir isotherm for Pb2+ ions, and Temkin isotherms for Cd2+, and Cu2+ ions. The maximum adsorption capacities, qm, are 606, 391, and 112 mg/g for Pb2+, Cd2+, and Cu2+ ions, respectively. The electrostatic interaction is responsible for the adsorption of Cd2+, and Cu2+ ions on LaFeO3/biochar composite. In case of Pb2+ ions form a complex with the surface functional groups of the adsorbate. LaFeO3/biochar composite shows high selectivity for the studied metal ions and excellent performance in real samples. The proposed sorbent can be easily regenerated and effectively reused.

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“…Carbon-rich compounds, such as biochar, have lately been employed as alternative and cost-effective adsorbents to remove or inactivate pesticides and other inorganic and organic toxins found in soil and water systems [5][6][7][8][9][10]. The high adsorption of contaminants into biochar is caused by the large surface area [11], micro, meso, and macro pores [12][13][14], and high pH [15]. Many research about biochar as an ameliorant to remove pollutants in water and soil has been investigated based on a characteristic of biochar [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of glyphosate adsorption with biochar from young coconut waste

Herviyanti

Maulana

Prasetyo

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Biochar is a carbon-rich by-product of biomass pyrolysis that can limit glyphosate mobility in soil using amelioration technology. Study of the basic principles of glyphosate adsorption behaviour in biochar from young coconut waste using the Kon-Tiki method at temperature (682°C), moisture content (81.27%), and yield ratio (20.87%) at the size of ≤2 mm. The absorption of glyphosate in biochar increased as glyphosate content rose, whereas pH declined. The capacity and adsorption coefficient of glyphosate by biochar from young coconut waste was 0.85 mg g-1 and 56.25 L Kg-1 at a pH of 8.03 and a concentration of 100 mg L-1 glyphosate. The adsorption isotherm of glyphosate occurs in the Freundlich and Langmuir models (Freundlich > Langmuir), wherein the Freundlich model (y = 1.8373x - 2.3971; R2 = 0.9771) with a value of n (0.54) and KF [0.004 (L mg-1)1/n], and the Langmuir model (y = - 17.066x + 251.58; R2 = 0.7239) with a value of Qm (0.06 mg g-1) and KL (0.07 L mg-1).

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Adsorption of Lead from Aqueous Solution by Biochar: A Review

Cited by 26 publications

References 167 publications

Difference in Radial Direction of Lumpy Coke Sampling from Raceway of Large Blast Furnaces: Microstructure, Alkali Enrichment, and Solution Loss Reaction

Difference in Radial Direction of Lumpy Coke Sampling from Raceway of Large Blast Furnaces: Microstructure, Alkali Enrichment, and Solution Loss Reaction

A correlation of the adsorption capacity of perovskite/biochar composite with the metal ion characteristics

Characteristics of glyphosate adsorption with biochar from young coconut waste

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