Adsorption of Arsenic on Fe-Modified Biochar and Monitoring Using Spectral Induced Polarization

Kirmizakis, Panagiotis; Tawabini, Bassam; Siddiq, Omer Muhammad; Kalderis, Dimitrios; Ntarlagiannis, Dimitrios; Soupios, Pantelis

doi:10.3390/w14040563

Cited by 13 publications

(7 citation statements)

References 83 publications

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“…The authors [ 59 , 60 ] showed in their studies that the Fe-biochar composite has the potential to remove selenium from aqueous solutions. Similar trends were described by [ 61 , 62 ], who showed the ability of iron-modified biochar to adsorb arsenic at the level of 98%. Many researchers have described the use of modified biochars [ 7 ], including those modified with iron [ 63 , 64 ].…”

Section: Introductionsupporting

confidence: 88%

“…BC1 and BC2 composites are characterized by an O/C value ranging from 0.2 to 0.6, and therefore they can be described as moderately stable (half-life from 100 to 1000 years) [ 82 ]. The increasing O/C value indicates the increasing polarity and, at the same time, lower hydrophobicity of biochar [ 62 ]. Therefore, the BC1 composite seems to be the least hydrophobic of the tested samples.…”

Section: Resultsmentioning

confidence: 99%

“…However, the presence of deformation vibrations of the C-H bond was determined in samples B and BC2 in the area with a wavelength of 1393 cm −1 . These may be areas corresponding to the CH methyl bond [ 62 ]. In all samples except BC4, the presence of stretching vibrations of the C-O bond was observed in the region of a wavelength of 1256–1260 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

“…Kirmizakis et al, 2022 [62] indicate that iron modification played a significant role in the adsorption of As (removal rate 77.8%) by biochar. Satyro et al, 2021 [61] studied the The final concentration of the tested metals after sorption using these composites was less than 1% of the initial concentration.…”

Section: Experiments For Removing Metals From Aqueous Solutionmentioning

confidence: 99%

“…The methods for producing biocarbon-based composites include initial processing of biomass with additional raw materials and then pyrolysis, or subjecting the biomass to pyrolysis and then processing with additional raw materials and/or secondary pyrolysis [ 14 , 47 , 51 , 52 , 61 , 62 , 67 ] produced Fe-biochar composites by impregnating biochar samples with iron compounds and post-processing them. The authors [ 68 ] produced an iron oxide-biochar composite using a ferric chloride solution and pomelo peel in a one-step method.…”

Section: Introductionmentioning

confidence: 99%

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Properties and Possibilities of Using Biochar Composites Made on the Basis of Biomass and Waste Residues Ferryferrohydrosol Sorbent

Wystalska,

Kowalczyk,

Kamizela

et al. 2024

Materials

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Biochar enriched with metals has an increased potential for sorption of organic and inorganic pollutants. The aim of the research was to identify the possibility of using biochar composites produced on the basis of waste plant biomass and waste FFH (ferryferrohydrosol) containing iron atoms, after CO2 capture. The composites were produced in a one-stage or two-stage pyrolysis process. Their selected properties were determined as follows: pH, ash content, C, H, N, O, specific surface area, microstructure and the presence of surface functional groups. The produced biochar and composites had different properties resulting from the production method and the additive used. The results of experiments on the removal of methylene blue (MB) from solutions allowed us to rank the adsorbents used according to the maximum dye removal value achieved as follows: BC1 (94.99%), B (84.61%), BC2 (84.09%), BC3 (83.23%) and BC4 (83.23%). In terms of maximum amoxicillin removal efficiency, the ranking is as follows: BC1 (55.49%), BC3 (23.51%), BC2 (18.13%), B (13.50%) and BC4 (5.98%). The maximum efficiency of diclofenac removal was demonstrated by adsorbents BC1 (98.71), BC3 (87.08%), BC4 (74.20%), B (36.70%) and BC2 (30.40%). The most effective removal of metals Zn, Pb and Cd from the solution was demonstrated by BC1 and BC3 composites. The final concentration of the tested metals after sorption using these composites was less than 1% of the initial concentration. The highest increase in biomass on prepared substrates was recorded for the BC5 composite. It was higher by 90% and 54% (for doses of 30 g and 15 g, respectively) in relation to the biomass growth in the soil without additives. The BC1 composite can be used in pollutant sorption processes. However, BC5 has great potential as a soil additive in crop yield and plant growth.

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