Investigation of Langmuir and Freundlich Adsorption Isotherm of Co2+ Ion by Micro Powder of Cedar Leaf

Haghdoost, Gholamali; Aghaie, H; Monajjemi, Majid

doi:10.13005/ojc/330363

Cited by 12 publications

(5 citation statements)

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“…From these experimental results, in Table 4 the equilibrium results, from which the fit of the data were done on Langmuir or Freundlich isotherms, was given. The data from this Table best fitted (r 2 = 0.9932) to the Langmuir type-2 isotherm (Haghdoost et al, 2017):…”

Section: Mercury(ii) Uptake Onto Lewatit Sp112 Resinmentioning

confidence: 97%

La eliminación de metales tóxicos presentes en efluentes líquidos mediante resinas de cambio iónico. Parte XII: Mercurio(II)/H+/Lewatit SP112

Escudero

2020

REVMETAL

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El mercurio(II) puede ser eliminado de disoluciones acuosas acidas mediante la resina de intercambio catiónico Lewatit SP112. Se ha investigado la influencia de distintas variables experimentales sobre la carga del mercurio(II) en la resina: velocidad de agitación (275–1000 min−1), temperatura (20–60 °C), valor de pH del medio acuoso (0–4) y dosificación de la resina (0.05–0.4 g·L−1). La carga de mercurio(II) en la resina disminuye con el aumento de la temperatura (reacción exotérmica) en un proceso espontaneo, mientras que el modelo de núcleo recesivo representa al mecanismo de carga del metal en el rango de temperaturas investigado. Los datos experimentales se ajustan al modelo cinético de segundo orden (275 min−1) o al modelo de pseudo segundo orden (500–1000 min−1), aunque la carga máxima del metal en la resina no depende de la velocidad de agitación. Los datos experimentales se ajustan a la isoterma tipo-2 de Langmuir. Se ha comparado la carga de mercurio(II) con distintas resinas y con nanotubos de carbono de pared múltiple. El mercurio(II) puede ser eluido con distintos eluyentes, pudiéndose obtener mercurio en estado de oxidación 0 a partir de las disoluciones de elución conteniendo al Hg(II).

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Section: Mercury(ii) Uptake Onto Lewatit Sp112 Resinmentioning

confidence: 97%

La eliminación de metales tóxicos presentes en efluentes líquidos mediante resinas de cambio iónico. Parte XII: Mercurio(II)/H+/Lewatit SP112

Escudero

2020

REVMETAL

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“…This resulted in a decrease in the total amount of chelating functional groups and a reduction in chelate efficiency [16]. Additionally, a high concentration of H + in the solution might induce electrostatic repulsion between the heavy metal recapters and Ni 2+ cations in complex compounds, thereby diminishing their ability to chelate heavy metals [17]. On the other hand, when the pH of the wastewater was too high, the stability of the complex compounds formed by the heavy metal recapter EDTA and its intermediates with Ni could be enhanced [18,19].…”

Section: Comparison Of the Heavy Metal Recaptersmentioning

confidence: 99%

Efficiency and Cost of the “Fenton+Recapter” Combined Process for Treating the Electroplating Nickel Wastewater

Han,

Huang,

Wang

et al. 2024

J. Phys.: Conf. Ser.

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The aim of this work was to investigate the “Fenton+Recapter” combined process for treating electroplating nickel wastewater. Firstly, five commonly used dithiocarbamate heavy recapters (DTC types) were compared and selected through trial tests. Then, the optimization of the sole Fenton process was carried out, including the dosing molar ratio of Fe2+/H2O2, the dosage of H2O2 and the reaction time. At last, the optimization and cost analysis of the combination process was carried out to meet the nickel wastewater treatment standards and to determine the optimal fit point. The experimental results showed that DTC-2 was a more suitable heavy recapter, with advantages of wide pH adaptation range (3.0-11.0), strong anti-interference, fast Ni removal rate, and low cost (1.20 ¥/t). The optimal molar ratio of Fe2+/H2O2 in the sole Fenton process was determined to be 0.8, which resulted in the optimum breaking effect and a 98.5% removal rate of Ni. The optimization of the combined process parameters showed that when the dosage of heavy recapter DTC-2 (1%) was 0.08 mg/L, 0.19 mg/L, 0.5 mg/L, 1.25 mg/L, 7.5 mg/L, and 25 mL/L respectively, the residual concentration of Ni in Fenton effluent was 0.2 mg/L, 0.3 mg/L, 0.5 mg/L, 0.7 mg/L, 1.0 mg/L, and 1.5 mg/L, which all could meet the discharge standards (concentration of Ni ≤0.1 mg/L). The best fit for the “Fenton+Recapter” combined process was to first treat nickel wastewater with Fenton until the Ni concentration was about 1.0 mg/L, and then use heavy recapter DTC-2 to capture and treat the wastewater until it meets the standard discharge. Under this condition, the treatment cost of the combined process was the lowest (7.79 ¥/t).

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“…Dapat dilinearisasikan menjadi (Haghdoost et al, 2017): Proses adsorpsi LAS menggunakan ampas kopi sebagai adsorben menghasilkan nilai koefisien korelasi (R 2 ) sebesar 0.8651 pada isoterm Langmuir dan R 2 sebesar 0,8615 pada isoterm Freundlich. Kedua kesetimbangan ini dapat diterapkan, namun jika mengacu pada rentang koefisien korelasi (R 2 ) yang paling mendekati 1, maka proses adsorpsi tersebut cenderung mengarah pada isoterm Langmuir, yang artinya prosesnya terjadi secara monolayer dan bersifat homogen (Wijayanti & Kurniawati, 2019).…”

Section: …………………………………… (5)unclassified

Kajian Isoterm Adsorpsi Linear Alkilbenzena Sulfonate (LAS) dalam Limbah Cair Detergen Menggunakan Biosorben Ampas Kopi dan Ampas Kelapa

Septiani,

Darajat,

Yunus

et al. 2023

Eksergi

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One of the efforts to minimize the impact of detergent waste pollution is by adsorption using coffee dregs and coconut dregs adsorbents. The purpose of this study was to determine the optimum mass of coffee grounds and coconut pulp as adsorbents, to compare the effectiveness of their absorption in decreasing levels of Linear Alkyl Benzene Sulfonate, and to study their adsorption isotherm models. This research was conducted in batches with variations in the mass of each adsorbent, namely 1 gram, 2 grams, 3 grams, 4 grams and 5 grams. This research was conducted in batches with variations in the mass of each adsorbent, namely 1 gram, 2 grams, 3 grams, 4 grams and 5 grams. The detergent waste samples were contacted with the adsorbent for 30 minutes and then the absorption capacity was tested using the Methylene Blue test method. The results showed that the optimum absorption of LAS content from coffee grounds and coconut pulp adsorbents occurred at a mass of 2 grams with the greatest increase in absorption efficiency index Coconut dregs adsorbent is more effective than coffee dregs because it can absorb up to 37%, while coffee dregs are only 10% with the same adsorbent mass of 5 grams. The adsorption isotherm model of the 2 types of adsorbents refers to the Langmuir equilibrium with R2 values for coffee grounds 0.8651 and coconut pulp 0.9868.

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Investigation of Langmuir and Freundlich Adsorption Isotherm of Co2+ Ion by Micro Powder of Cedar Leaf

Cited by 12 publications

References 0 publications

La eliminación de metales tóxicos presentes en efluentes líquidos mediante resinas de cambio iónico. Parte XII: Mercurio(II)/H+/Lewatit SP112

La eliminación de metales tóxicos presentes en efluentes líquidos mediante resinas de cambio iónico. Parte XII: Mercurio(II)/H+/Lewatit SP112

Efficiency and Cost of the “Fenton+Recapter” Combined Process for Treating the Electroplating Nickel Wastewater

Kajian Isoterm Adsorpsi Linear Alkilbenzena Sulfonate (LAS) dalam Limbah Cair Detergen Menggunakan Biosorben Ampas Kopi dan Ampas Kelapa

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