Yazar "Teymur, Yekbun Avsar" seçeneğine göre listele

Listeleniyor 1 - 3 / 3
  • [ X ]
    Öğe
    Red pepper (Capsicum annuum L.) industrial processing pulp-derived nanoporous carbon sorbent for the removal of methylene blue, diclofenac, and copper(II)
    (Springer Heidelberg, 2024) Koyuncu, Filiz; Guzel, Fuat; Teymur, Yekbun Avsar
    The present study relates to the physicochemical investigation of the methylene blue, diclofenac, and copper(II) sorptions from the water of the new activated carbon (RPAC) prepared in single-step KOH-activated pyrolysis from red pepper (Capsicum annuum L.) industrial processing pulp (RP) under optimized conditions. Sorption conditions were optimized according to the maximum effects of key factors (RPAC dosage, sorbate concentration, interaction time, and temperature) affecting sorption processes at their natural pH in water. The kinetic and equilibrium experimental sorption data of the examined sorbates were simulated to widely used models and found to fit well with the pseudo-second-order and Langmuir models, respectively. The maximum sorption capacity for methylene blue, diclofenac, and copper(II) by RPAC was found to be 322.6, 303.0, and 196.1 mg g(-1) at their natural pH and 50 degrees C, respectively. Thermodynamic parameters determined for each sorption system indicated that the sorption processes were endothermic and spontaneous. The outputs of the present study highlight that RPAC can be used as an effective sorbent in removing contaminants from water.
  • [ X ]
    Öğe
    Use of a novel bio-magnetic nanocomposite synthesized from industrial tomato processing waste for methylene blue removal: sorption optimization, kinetic and isotherm studies
    (Springer, 2020) Teymur, Yekbun Avsar; Guzel, Fuat; Koyuncu, Filiz; Saygili, Gulbahar Akkaya
    In the current study, the methylene blue (MB) dye sorption performance of a new biomagnetic composite (MTNC) synthesized by modification with Fe(3)O(4)nanoparticles of industrial tomato processing (Lycopersicon esculentumMill.) processing solid waste (TW) was investigated. The XRD, BET, SEM, FT-IR and VSM analysis techniques were used in the characterization of MTNC. The specific surface area, total pore volume, micropore volume, mesopore volume, and mean pore diameter values of MTNC are 28.21 m(2)/g, 0.082 cm(3)/g, 0.003 cm(3)/g, 0.079 and 11.06 nm, respectively. Also, its saturation magnetization value was determined to be 24.80 emu/g. The maximum MB sorption capacity of the MTNC determined to be 90.09 mg/g under optimized conditions of the solution pH of 7.0, WPC dosage of 50 mg, contact time of 180 min, and solution temperature of 50 degrees C. The kinetics and isotherm data were well fitted to the pseudo-second order kinetic and Langmuir isotherm models, respectively. The thermodynamic parameters calculated for the MTNC-MB sorption system proved that the process was spontaneous and endothermic in nature.
  • [ X ]
    Öğe
    Using of magnetized and non-magnetized tomato industrial processing solid waste in remediation of Reactive Blue 19 dye aqueous solution
    (Taylor & Francis Inc, 2020) Teymur, Yekbun Avsar; Guzel, Fuat
    In this study, the removal performance of the Reactive Blue 19 (RB19) dye of the magnetized and non-magnetized industrial tomato solid waste (TW) from the aqueous medium was investigated. The properties of the prepared TW and magnetically modified TW (MTW) bio-sorbents were illuminated using XRD, BET, SEM, VSM, FT-IR and Boehm titration analysis techniques. The optimal conditions for sorption of RB19 by both sorbents were identified. The kinetics and equilibrium data of RB19 sorption by both sorbents were found to match the pseudo-second-order kinetic and Langmuir isotherm models, respectively, with high correlation coefficients. The maximum RB19 sorption capacity under the optimum conditions determined by TW and MTW was determined as 38.76 and 58.14 mg/g, respectively. Thermodynamic parameters calculated for RB19 sorption by both sorbents showed that the processes were spontaneous and exothermic.