A Simple Approach for Determining the Maximum Sorption Capacity of Chlorpropham from Aqueous Solution onto Granular Activated Charcoal

Alsehli, Bandar R. M. Alsehli

doi:10.3390/pr8040398

Cited by 9 publications

(3 citation statements)

References 37 publications

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“…Konsentrasi merupakan data dasar yang diperlukan untuk menghitung jumlah polimer yang teradsorpsi dan bentuk lapisan yang terbentuk dalam proses adsorpsi. Langkah pertama perhitungan konsentrasi untuk setiap sampel adalah pembuatan kurva standar (kurva kalibrasi), langkah ini sangat penting untuk menentukan hubungan antara konsentrasi dan absorban (Alsehli, 2020;DaCosta, 2017;Fathaddin, 2006). Umumnya, hubungan ini dapat dinyatakan dengan persamaan berikut:…”

Section: Sistem Batchunclassified

Penerapan Model Isotermal untuk Adsorpsi Statik Xanthan pada Batuan Pasir untuk Berbagai Salinitas

Fathaddin

2021

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Salah satu fenomena yang biasa terjadi selama injeksi polimer adalah adsorpsi. Fenomena ini memainkan peran penting, karena mereka mempengaruhi sifat batuan dan fluida. Adanya lapisan polimer teradsorpsi akan diameter pori. Hal ini akan menghambat aliran fluida. Dalam kajian ini dilakukan pengamatan pengaruh konsentrasi dan salinitas terhadap adsorpsi xanthan pada butiran pasir dalam sistem statik (batch). Konsentrasi xanthan divariasikan dari 200 ppm hingga 2,000 ppm sedangkan salinitas divariasikan dari 10,000 ppm hingga 20,000 ppm. Butiran pasir yang digunakan berukuran pasir 100 mesh (0.149 mm). Percobaan dilakukan pada suhu ruang. Pengukuran absorben dilakukan dengan menggunakan spektrophotometer pada panjang gelombang cahaya tampak sebesar 600 nm. Tiga model adsorpsi isothermal digunakan dalam kajian ini yaitu Langmuir, Freundlich, dan Simha-Frish-Eirich untuk membuat korelasi antara konsentrasi partikel teradsorpsi dan konsentrasi larutan xanthan dalam kesetimbangan. Berdasarkan hal pengamatan disimpulkan bahwa tingkat adsorpsi berkurang dengan bertambahnya salinitas. Dalam kajian ini secara umum penerapan model Freundlich memberikan hasil terbaik dalam menggambarkan proses adsorpsi xanthan.

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Section: Sistem Batchunclassified

Penerapan Model Isotermal untuk Adsorpsi Statik Xanthan pada Batuan Pasir untuk Berbagai Salinitas

Fathaddin

2021

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“…where q e is the concentration of IBU on solid surface (µg/cm 2 ), C o is the initial concentration of IBU in aqueous solution (µg/L), C e is the equilibrium concentration of IBU in aqueous solution (µg/L), V is the volume of aqueous solution (L), and A is the surface area of solid surface (cm 2 ). In this work, Langmuir, Freundlich, and Temkin isotherms were utilized to model the adsorption behavior of IBU [51][52][53][54][55][56][57]. Manipulations of q e and C e for R-and S-IBU were plotted in accordance with the Langmuir, Freundlich, or Temkin isotherms to determine the best-fit model for the adsorption system.…”

Section: Adsorption Isotherm Modelingmentioning

confidence: 99%

Removal of Enantiomeric Ibuprofen in a Nanofiltration Membrane Process

Higgins

Duranceau

2020

Membranes

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A study of the behavior of R- and S-enantiomers of ibuprofen (R-IBU and S-IBU) in aqueous solution by nanofiltration (NF) membranes revealed that up to 23% of the pharmaceutical was adsorbed onto the stainless steel equipment of a flat-sheet experimental unit. Mass balances disclosed that IBU’s S-enantiomer was primarily responsible for the adsorption onto the equipment. Additional IBU adsorption was also experienced on the NF membrane coupons, verified by increased contact angle measurements on the surfaces. The IBU-equipment adsorptive relationship with and without the membrane coupon were best described by Freundlich and Langmuir isotherms, respectively. At a feed water pH of 4.0 units and racemic µg/L IBU concentrations, NF removal ranged from 34.5% to 49.5%. The rejection of S-IBU was consistently greater than the R-enantiomer. Adsorption onto the surfaces influenced NF rejection by 18.9% to 27.3%. The removal of IBU displayed a direct relationship with an increase in feed water pH. Conversely, the adsorption of IBU exhibited an indirect relationship with an increase in feed water pH.

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“…In the recent past, researchers conducted some analysis inside potato stores and they noticed that traces of 3-chloroaniline (3CA) compound was found on the air [4][5][6][7][8][9]. The researchers argued that the presence of 3CA could be because of thermal degradation of chlorpropham (CIPC) that takes place during the fogging process.…”

Section: Introductionmentioning

confidence: 99%

Removal of 3-Chloroaniline from aqueous solution by Treated Coffee Waste: Isotherm Modelling and Thermodynamic Studies

Alsehli

2021

Preprint

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Background: Chloroaniline is a crucial organic additive commonly applied in medicine, chemical industries, plastics and pesticides. Besides, it is also a widespread pollutant, which has a high degree of persistence, toxicity, accumulation and it is hard to be naturally degraded. Result: 3-chloroaniline (3CA) concentrations were measured in aqueous solution by UV/Vis spectrophotometer. Validation of the calibration curve's linearity, instrumental precision (RSD%), limits of detection and quantification were accomplished. The coefficient of calibration curve (1.0–10.0 mgL-1 3CA) had a high correlation (R² = 0.9997) and the instrumental precision was in the range (RSD% = 0.50–0.74%, n=10). The LOD and LOQ from the regression analysis were 0.20 mgL-1 and 0.61 mgL-1, respectively. A treated coffee waste adsorbent was utilized for 3-chloroaniline removal by process of sorption from aqueous solution. The major components of the coffee waste are the hemicellulose, cellulose, and lignin. The temperature effect (25°C, 35°C and 45°C) on sorption was evaluated, with sorption decreasing by increasing of temperature. Isotherms type L were found and associated with monolayer sorption. The parameters of sorption were examined by employing Langmuir, Freundlich and Dubinin-Radushkevich sorption models. The isotherm models of Langmuir and Dubinin-Radushkevich had acceptable correlation coefficients (R2). The Langmuir and Dubinin-Radushkevich sorption capacities of 3-chloroaniline were found to be 44 to 50 mgg−1. The values of separation factor (RL) were ranging from (0-1) which indicated a favourable sorption. In thermodynamic study the physical sorption process was confirmed by van’t Hoff equation. In addition, the free energy ∆G° and enthalpy ∆H° had negative values which suggested that the sorption was spontaneous, and the process was exothermic. Conclusion: Since the adsorbent used in this study is abundant and available, it is considered a potential adsorbent material for 3CA removal from aqueous fluids and suitable for the wastewater treatment.

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A Simple Approach for Determining the Maximum Sorption Capacity of Chlorpropham from Aqueous Solution onto Granular Activated Charcoal

Cited by 9 publications

References 37 publications

Penerapan Model Isotermal untuk Adsorpsi Statik Xanthan pada Batuan Pasir untuk Berbagai Salinitas

Penerapan Model Isotermal untuk Adsorpsi Statik Xanthan pada Batuan Pasir untuk Berbagai Salinitas

Removal of Enantiomeric Ibuprofen in a Nanofiltration Membrane Process

Removal of 3-Chloroaniline from aqueous solution by Treated Coffee Waste: Isotherm Modelling and Thermodynamic Studies

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