Sustainable Production of Porous Activated Carbon from Hydrothermally Carbonized Jamoya Fruit Seeds and Its Potential for Adsorbing the Azo Dye Carmoisine B

Processes, Год журнала: 2025, Номер 13(2), С. 385 - 385

Опубликована: Янв. 31, 2025

Porous carbon materials can serve as effective and versatile adsorbents in water pollution management. This study presents a cost-effective environmentally friendly method to produce porous (JFS-PC) by exploiting Jamoya fruit seeds (JFS) precursor using hydrothermal carbonization (HTC) process. HTC is thermochemical process for the conversion of high moisture content biomass into carbon-rich materials. The performed temperature range 180–250 °C during which submerged heated sealed environment under autogenous pressure. obtained were explored different techniques viz. XRD, FTIR, FE-SEM, surface area analyses evaluate their characteristics that are beneficial adsorption Surface analysis revealed developed activated exhibits appreciable (440.8 m2g−1), with mean pore diameter 3.97 nm. Activated was successfully tested on removal an azo dye, Carmoisine B (CB), from systems. Isothermal kinetic evaluation demonstrated dye agrees well Langmuir (R2 = 0.993) pseudo-second-order 0.998) kinetics models. experiments designed investigate influence adsorbate concentration (1 × 10−4 2 mol L−1), collision time (5–300 min), pH (2–12) solution, (25–45 °C) selected dye. results influences capacity CB showed maximum between 5. Experimentally, isotherms capacities 169.0 mg g−1, at 45 °C. Mechanisms indicate charge adsorbent, structures play key roles adsorption. Thermodynamic parameters endothermic physisorption supported Van’t Hoff calculations. indicates be used It also highlights use inexpensive renewable development

Язык: Английский

Progressive Conversion Model Applied to the Physical Activation of Activated Carbon from Palm Kernel Shells at the Pilot Scale in a Nichols Furnace and at the Industrial Scale in a Rotary Kiln

Molecules, Год журнала: 2025, Номер 30(7), С. 1573 - 1573

Опубликована: Март 31, 2025

Palm kernel shells, an abundant agro-industrial residue in countries like Ecuador, can be valorized through their conversion into activated carbon for industrial applications. This study investigates the physical activation of carbonized palm shells using both a Nichols furnace at pilot scale and rotary kiln scale. The progressive model was used to explain how process works calculate reaction rate constants CO2 (krCO2) H2O (krH2O). experimental results demonstrated that H2O-rich atmosphere significantly enhanced porosity development iodine index compared alone. Additionally, confirmed kinetics are primarily controlled by chemical rather than mass transport limitations, as indicated negligible effect particle size on gasification rates. At 850 °C, were calculated krCO2 = 0.75 (mol·cm−3·s)−1 krH2O 8.91 (mol·cm−3·s)−1. model’s predictions closely matched data, validating its applicability optimization scales. These findings provide valuable insights improving efficiency production from large-scale operations.

Язык: Английский

Bis-Imidazolium-Based Poly(Ionic Liquid)-Functionalized Hydrochar for Efficient Sorption of Methyl Orange and Sodium 2,4-Dichlorophenoxyacetate

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Апрель 2, 2025

Environmentally friendly hydrochar demonstrates excellent performance in the treatment of cationic pollutants, yet its capability to address anions is limited. Cationic imidazolium ionic liquids carry a positive charge, and modification surface can increase thereby improving ability remove anions. Herein, bis-imidazolium-based poly(ionic liquid)-functionalized (BIPIL-HC) was prepared using derived from hydrothermal carbonization bamboo powder N,N'-methylene-bis(1-(3-vinylimidazolium)) chloride via free radical polymerization characterized different instruments. The behavior BIPIL-HC adsorbing methyl orange (MO) sodium 2,4-dichlorophenoxyacetate (2,4-D Na) studied by batch adsorption experiments, including effects initial concentration temperature, solution pH, contact time on adsorption, regeneration experiments. kinetics isotherms conformed pseudo-second-order Langmuir models. capacity for MO 2,4-D Na reached 554.91 565.50 mg·g-1, respectively. also effective removing under diverse pH values highly reusable. Mechanism analysis shows that hydrogen bonding, ion exchange, electrostatic, π-π interactions promote two pollutants BIPIL-HC. Particularly, group decisive capture anionic through anion exchange electrostatic interaction. These results confirm use liquid functionalization as method modifying effectively enhance wastewater, obtained promising value wastewater handling.

Язык: Английский