Fabrication of biochar from jarul (Lagerstroemia speciosa) seed hull for ultrasound aided sequestration of ofloxacin from water: Phytotoxic assessments and cost analysis

Das, Subhajit; Paul, Sajal Rudra; Debnath, Animesh

doi:10.1016/j.molliq.2023.122610

Cited by 30 publications

(2 citation statements)

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“…49–51 At higher pH values, the number of positive sites decreased and negative sites increased, which caused electrostatic repulsions between the negative charge surface sites of the nanoadsorbent and anionic azo dye molecules. 17–19,23 The adsorption of the anionic dyes CR and EY by Fe 3 O 4 @DABA can be attributed to the electrostatic interaction between the protonated amine group of Fe 3 O 4 @DABA (–NH 3+ ) and the anionic group of the CR (–SO 3 − ) and EY (–CO 2 − ) molecules, as illustrated in Fig. 5(b).…”

Section: Resultsmentioning

confidence: 99%

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Magnetically recyclable adsorption of anionic pollutants from wastewater using 3,5-diaminobenzoic acid-functionalized magnetic iron oxide nanoparticles

Munsi,

Rahman,

Islam

et al. 2024

New J. Chem.

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Section: Resultsmentioning

confidence: 99%

“…10–12 Some of the adsorbent materials that have already been used for azo dye removal from wastewater are modified alumina, fly ash, biochar, activated carbon, kaolinite dust, tobacco powder, porous and crystalline functional gel, magnetic polymeric beds, some non-magnetic and several magnetic metal oxide composites. 13–20…”

Section: Introductionmentioning

confidence: 99%

Magnetically recyclable adsorption of anionic pollutants from wastewater using 3,5-diaminobenzoic acid-functionalized magnetic iron oxide nanoparticles

Munsi,

Rahman,

Islam

et al. 2024

New J. Chem.

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FeBTC MOF‐Derived Fe₃O₄@C Nanocomposite: Controlled Synthesis and Application as Potential Adsorbent for Rhodamine Dye Elimination From Wastewater

Said,

Abd EL‐Wahab,

Sadek

2024

Applied Organom Chemis

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This study explores the controlled synthesis of a novel Fe3O4@C magnetic nanocomposite derived from FeBTC metal–organic framework (MOF) and its application as an efficient adsorbent for the removal of rhodamine dye from wastewater. The FeBTC MOF was first synthesized and then thermally decomposed in a controlled oxygen atmosphere at 375°C (1 h) to form the Fe3O4@C nanocomposite with a magnetic Fe3O4 core embedded in a porous carbon matrix. A comprehensive characterization of the nanocomposite was performed using x‐ray diffraction (XRD), transmission electron microscopy (TEM), and x‐ray photoelectron spectroscopy (XPS) to confirm the successful formation and to evaluate its structural and morphological properties. The morphological investigation revealed that the particles of Fe3O4 had a spherical shape with diameter of 10–15 nm. The carbon coating appeared as a thin amorphous layer surrounding the Fe3O4 nanoparticles. The adsorption capacity of Fe3O4@C for rhodamine B (RhB) dye was assessed under various conditions, including different pH values, contact times, initial dye concentrations, and temperatures. Complete dye removal was attained in 45 min using 50 mg of the nanocomposite and 50 mL of 5.0 ppm RhB at the optimum pH of 9.1. Under the same experimental conditions, the highest adsorption capacity of 13.0 mg/g was obtained, but using 15.0 mg of the nanocomposite. Fe3O4@C nanocomposite exhibits high adsorption efficiency, with a maximum removal capacity of 100%, which is clearly superior to many conventional adsorbents. This performance can be attributed to the synergistic effects of the magnetic Fe3O4 and the large surface area of the carbon matrix. Kinetic models were employed to understand the adsorption mechanism. The adsorption kinetics followed a pseudo‐second‐order model. The reusability of the adsorbent was tested over multiple cycles and showed a minimal loss of performance (drops to 93.0% after five removal cycles). The study demonstrates that the Fe3O4@C nanocomposite is a promising candidate for the effective removal of organic dyes from wastewater, offering potential benefits for environmental remediation and sustainable water management.

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EDTA functionalized pine needle biochar (EDTA@BC); a valorized bio‐material for removal of Ni(II) from aqueous solution

Rasheed,

Kayani

et al. 2024

Microscopy Res & Technique

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The preparation of ethylenediaminetetraacetic acid (EDTA) functionalized pine needles biochar (EDTA@BC) as a low‐cost active adsorbent and its effectiveness in removing Ni(II) from aqueous solution at various conditions is reported in this paper. First, alkali activation was selected to render the pine needle biochar with an excellent porous structure and increased concentration of hydroxyl groups to facilitate grafting. Subsequently, a simple method was utilized to graft EDTA onto the biochar. The prepared EDTA@BC was characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and energy dispersive x‐ray spectrometry (EDX). Batch adsorption studies were conducted to assess the impact of various parameters such as solution pH, adsorbent dosage, adsorbate volume, and shaking time on the removal efficiency of Ni(II). At pH 6, 100 mg dosage, 4 mL of adsorbate volume, and 10 min of shaking time, the maximum removal efficiency of Ni(II) was observed to be 89%. EDTA@BC showed reasonable sorption performance still after the third cycle of regeneration. The effect of interfering ions such as Pb, Cr, Cu, and Hg was evaluated, resulting a decrease of 69%, 78%, 76%, and 68%, respectively, in its sorption capacity. The Langmuir model provided a better fit for Ni(II) in the concentration range of 0.1–2000 ppm under optimized conditions, with qmax of 46.69 ± 1.031 mg/g and KL of 0.001, compared with the Freundlich isotherm, which yielded n = 0.234 and χ2 = 2.7899, Temkin isotherm (R2 = 0.9520), and Redlich‐Peterson isotherm (R2 = 0.9725). The removal of Ni(II) by EDTA@BC was found to be the pseudo‐second‐order kinetics. Thermodynamic studies indicated adsorption process to be endothermic and nonspontaneous. Hence, a sustainable valorized bio‐material (EDTA@BC) is prepared having better sorption efficiency of Ni(II) from aqueous solution with possible wide applicability.Research Highlights New EDTA functionalized indigenous pine needles biochar (EDTA@BC) was prepared. This low‐cost active adsorbent found effective in removing Ni(II) from aqueous solution. FTIR, SEM, and EDX proved synthesis and uptake of Ni(II) from aqueous solution. Ni(II) removal, regeneration, interfering and adsorption studies were performed by UV–Vis spectroscopy.

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Fabrication of biochar from jarul (Lagerstroemia speciosa) seed hull for ultrasound aided sequestration of ofloxacin from water: Phytotoxic assessments and cost analysis

Cited by 30 publications

References 51 publications

Magnetically recyclable adsorption of anionic pollutants from wastewater using 3,5-diaminobenzoic acid-functionalized magnetic iron oxide nanoparticles

Magnetically recyclable adsorption of anionic pollutants from wastewater using 3,5-diaminobenzoic acid-functionalized magnetic iron oxide nanoparticles

FeBTC MOF‐Derived Fe₃O₄@C Nanocomposite: Controlled Synthesis and Application as Potential Adsorbent for Rhodamine Dye Elimination From Wastewater

EDTA functionalized pine needle biochar (EDTA@BC); a valorized bio‐material for removal of Ni(II) from aqueous solution

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Fabrication of biochar from jarul (Lagerstroemia speciosa) seed hull for ultrasound aided sequestration of ofloxacin from water: Phytotoxic assessments and cost analysis

Cited by 30 publications

References 51 publications

Magnetically recyclable adsorption of anionic pollutants from wastewater using 3,5-diaminobenzoic acid-functionalized magnetic iron oxide nanoparticles

Magnetically recyclable adsorption of anionic pollutants from wastewater using 3,5-diaminobenzoic acid-functionalized magnetic iron oxide nanoparticles

FeBTC MOF‐Derived Fe3O4@C Nanocomposite: Controlled Synthesis and Application as Potential Adsorbent for Rhodamine Dye Elimination From Wastewater

EDTA functionalized pine needle biochar (EDTA@BC); a valorized bio‐material for removal of Ni(II) from aqueous solution

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Product

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FeBTC MOF‐Derived Fe₃O₄@C Nanocomposite: Controlled Synthesis and Application as Potential Adsorbent for Rhodamine Dye Elimination From Wastewater