Chitin derived biochar as an alternative adsorbent to treat colored effluents containing methyl violet dye

Zazycki, Maria Amélia; Borba, Priscila A.; Silva, Rafaela N.F.; Peres, Enrique Chaves; Perondi, Daniele; Dotto, Guilherme L.

doi:10.1016/j.apt.2019.04.026

Cited by 44 publications

(18 citation statements)

References 43 publications

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“…Both MBC and Ca/MBC exhibited type IV adsorption-desorption isotherms, showing a wide hysteresis loop, indicating the mesoporous character of materials (Figure 4). This is consistent with the pore sizes (PS) reported in Table S1 for MBC and Ca/MBC, namely 12.684 and 4.677 nm, respectively [29,30].…”

Section: Characterization Of Samplessupporting

confidence: 90%

“…Both MBC and Ca/MBC exhibited type IV adsorptiondesorption isotherms, showing a wide hysteresis loop, indicating the mesoporous character of materials (Figure 4). This is consistent with the pore sizes (PS) reported in Table S1 for MBC and Ca/MBC, namely 12.684 and 4.677 nm, respectively [29,30]. indicating that the initial monolayer-multilayer adsorption occurred in the same path as the corresponding part of the type II isotherm (Figure 4).…”

Section: Characterization Of Samplessupporting

confidence: 88%

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Enhanced Removal of Malachite Green Using Calcium-Functionalized Magnetic Biochar

Wang

Chen

Zhang

et al. 2022

IJERPH

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To efficiently remove malachite green (MG), a novel calcium-functionalized magnetic biochar (Ca/MBC) was fabricated via a two-step pyrolysis method. Iron-containing oxides endowed the target complexes with magnetic properties, especially the chemotactic binding ability with MG, and the addition of calcium significantly changed the morphology of the material and improved its adsorption performance, especially the chemotactic binding ability with MG, which could be confirmed through FTIR, XPS, and adsorption experiments. Electrostatic adsorption, ligand exchange, and hydrogen bonding acted as essential drivers for an enhanced adsorption process, and the maximum theoretical adsorption capacity was up to 12,187.57 mg/g. Ca/MBC maintained a higher adsorption capacity at pH = 4–12, and after five adsorption–desorption cycles, the adsorption capacity and adsorption rate of MG remained at 1424.2 mg/g and 71.21%, highlighting the advantages of Ca/MBC on adsorbing MG. This study suggests that biochar can be modified by a green synthesis approach to produce calcium-functionalized magnetic biochar with excellent MG removal capacity. The synthetic material can not only remove pollutants from water but also provide an efficient way for soil remediation.

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Section: Characterization Of Samplessupporting

confidence: 90%

Section: Characterization Of Samplessupporting

confidence: 88%

Enhanced Removal of Malachite Green Using Calcium-Functionalized Magnetic Biochar

Wang

Chen

Zhang

et al. 2022

IJERPH

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“…The average pore volume is 0.004 cm 3 /g for B500 and 0.012 cm 3 /g for R500. However, it is widely agreed that by conventional IUPAC (1972) classification, pores in diameter were divided into micropores (< 2 nm), mesopores (2-50 nm), and macropores (> 50 nm) [48]. The average pore size of the adsorbents used was 7.71 nm and 9.32 nm, respectively, and are structurally mesoporous [49].…”

Section: Biochar Characterizationmentioning

confidence: 99%

Biochars derived from bamboo and rice straw for sorption of basic red dyes

Sackey

Song

et al. 2021

PLoS ONE

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The primary purpose of this study is to eliminate Basic Red 46 dye from aqueous solutions utilizing batch experiments by adsorption on biochars prepared from bamboo and rice straw biomass. Biochars prepared from bamboo (B), and rice straw (R) was pyrolyzed at 500°C (B500 and R500). Scanning Electron Microscopy (SEM), Fourier Transform Infrared (FTIR) Spectroscopy, X-ray Diffraction (XRD), and surface area and porosity analyzers were used to characterize the B500 and R500 samples. The characterization results indicated that the biochars possessed an amorphous porous structure with many functional groups consisting primarily of silicates. The adsorption rate of BR46 was evaluated using two kinetic models (pseudo-first-order and pseudo-second-order), and the results indicated that the pseudo-second-order model fitted to the experimental data well (R2>0.99). Nearly 24 h was sufficient to achieve equilibrium with the dye adsorption for the two biochars. R500 had a greater adsorption efficiency than B500. As pH levels increased, the dye’s adsorption capability increased as well. The Langmuir and Freundlich isotherm models were used to investigate the equilibrium behavior of BR46 adsorption, and the equilibrium data fitted well with the Langmuir model (R2>0.99) compared to the Freundlich model (R2>0.89). The maximum adsorption capacities of BR46 are 9.06 mg/g for B500 and 22.12 mg/g for R500, respectively. Additionally, adsorption capacity increased as temperature increased, indicating that adsorption is favored at higher temperatures. The electrostatic interaction is shown to be the dominant mechanism of BR46 adsorption, and BR46 acts as an electron-acceptor, contributing to n-π EDA (Electron Donor-Acceptor) interaction. Thermodynamic parameters for the dye-adsorbent system revealed that the adsorption process is spontaneous and feasible. The values of the adsorption coefficient (Kd) were on the order of 102−103. Kd of R500 was greater than that of B500, indicating that R500 had a greater adsorption capacity. The results showed that R500 could be used as a low-cost alternative adsorbent for removing BR46 from effluents.

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“…Therefore, in this particular case observed by [93], we see that the decrease in removal efficiency, due to changes in pH, is not as pronounced as in the other cases. In the experiment pertaining to adsorption of methyl violet dye using biochar conducted by [98], for pH values > 6, it was found that the adsorption of dye was favored, and the trend observed was due to the fact that at very low pH, the concentration of H + ions is significant and, hence, they compete along with the cationic dye (methyl violet) for the active adsorption sites on the biochar, thereby decreasing the percentage of removal of the dye. When an anionic dye, such as Congo red, is to be removed, the trend relating to the effect of pH may vary compared to other commonly seen dyes.…”

Section: Effect Of Operational Parameters On the Adsorption Of Dyes Bmentioning

confidence: 99%

“…Methylene blue Langmuir, Freundlich [124] Rice husk biochar Congo red Langmuir, Freundlich [125] Cow dung biochar Congo red Langmuir, Freundlich [125] Magnetic chicken bone biochar Rhodamine B Freundlich [126] Chitin derived biochar Methyl violet Freundlich, Langmuir, Liu [98] Switchgrass biochar Methylene blue Langmuir, Freundlich [90] Switchgrass biochar Orange G Langmuir, Freundlich [90] Switchgrass biochar Congo red Langmuir, Freundlich [90] Banana peel extract and FeSO 4 Methylene blue Langmuir, Freundlich, Dubinin-Radushkevich [127] Chemically modified lychee seed biochar Methylene blue Langmuir, Freundlich, Temkin, Dubinin-Radushkevich [117] Bamboo shoot shell biochar Rhodamine B Langmuir, Freundlich [128] Cetyl trimethyl ammonium bromide modified magnetic biochar from pine nut shells Acid chrome blue K Langmuir, Freundlich [112] Bovine bone biochar Basic Red 9 Langmuir, Freundlich [110] Fish scale biochar Basic Red 9 Langmuir, Freundlich [110]…”

Section: Adsorbate Applicable Isotherm Models Referencementioning

confidence: 99%

Biochar as an Eco-Friendly and Economical Adsorbent for the Removal of Colorants (Dyes) from Aqueous Environment: A Review

Srivatsav¹,

Bhargav²,

Shanmugasundaram³

et al. 2020

Water

146

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Dyes (colorants) are used in many industrial applications, and effluents of several industries contain toxic dyes. Dyes exhibit toxicity to humans, aquatic organisms, and the environment. Therefore, dyes containing wastewater must be properly treated before discharging to the surrounding water bodies. Among several water treatment technologies, adsorption is the most preferred technique to sequester dyes from water bodies. Many studies have reported the removal of dyes from wastewater using biochar produced from different biomass, e.g., algae and plant biomass, forest, and domestic residues, animal waste, sewage sludge, etc. The aim of this review is to provide an overview of the application of biochar as an eco-friendly and economical adsorbent to remove toxic colorants (dyes) from the aqueous environment. This review highlights the routes of biochar production, such as hydrothermal carbonization, pyrolysis, and hydrothermal liquefaction. Biochar as an adsorbent possesses numerous advantages, such as being eco-friendly, low-cost, and easy to use; various precursors are available in abundance to be converted into biochar, it also has recyclability potential and higher adsorption capacity than other conventional adsorbents. From the literature review, it is clear that biochar is a vital candidate for removal of dyes from wastewater with adsorption capacity of above 80%.

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Chitin derived biochar as an alternative adsorbent to treat colored effluents containing methyl violet dye

Cited by 44 publications

References 43 publications

Enhanced Removal of Malachite Green Using Calcium-Functionalized Magnetic Biochar

Enhanced Removal of Malachite Green Using Calcium-Functionalized Magnetic Biochar

Biochars derived from bamboo and rice straw for sorption of basic red dyes

Biochar as an Eco-Friendly and Economical Adsorbent for the Removal of Colorants (Dyes) from Aqueous Environment: A Review

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