Results 1 to 10 of about 8,834 (191)

Langmuir and Freundlich Equation Test on Methylene Blue Adsorption by Using Coconut Fiber Biosorbent

Walisongo Journal of Chemistry, 2021
Methylene blue is a cationic dye often used for various industries. Methylene blue waste harms aquatic biota. Most ways have been done to reduce the methylene blue pollution that includes photocatalytic, electrochemical, and adsorption.
Anselmus Boy Baunsele, Hildegardis - Missa   +1 more
doaj   +4 more sources

Reconsideration of theoretical basis of Freundlich adsorption isotherm equation [PDF]

Soil Science and Plant Nutrition, 1996
Abstract I constructed a modified surface complexation model that leads to the Freundlich isotherm approximately. The derivation of the Freundlich isotherm equation is based on the assumption that cations and anions are adsorbed onto the same surface simultaneously.
Osamu Nakahara
  +5 more sources

Predicting sulphate adsorption/desorption in forest soils: Evaluation of an extended Freundlich equation

Chemosphere, 2015
Sulphate adsorption and desorption can delay the response in soil acidity against changes in acid input. Here we evaluate the use of an extended Freundlich equation for predictions of pH-dependent SO4 adsorption and desorption in low-ionic strength soil systems. Five B horizons from Spodosols were subjected to batch equilibrations at low ionic strength
Gustafsson (forward), Jon Petter, Akram, Muhammad, Tiberg, Charlotta   +2 more
openaire   +6 more sources

Langmuir and Freundlich isotherm equation test on the adsorption process of Cu (II) metal ions by cassava peel waste (Manihot esculenta crantz) [PDF]

Journal of Physics: Conference Series, 2021
Abstract This Study aims to determine the adsorption process of Cu (II) metal by cassava peel waste (Manihot esculenta crantz) meeting the Langmuir equation and Freundlich. Research method cassava peel made into activated carbon, then determine the mass, pH and optimum contact time.
S Nuryanti, null Suherman, S Rahmawati, M Amalia, T Santoso, H Muhtar   +5 more
openaire   +2 more sources

Attachment of Acidithiobacillus ferrooxidans onto different solid substrates and fitting through Langmuir and Freundlich equations

Biotechnology Letters, 2013
Attachments of Acidithiobacillus ferrooxidans ATCC 23270 onto elemental sulfur, quartz and complex chalcopyrite were investigated by analysis of its extracellular polymeric substances as well as applying Langmuir and Freundlich equations. The two equations fitted the adsorption equilibrium data with significant correlation coefficient over 0.9.
Xia, Le Xian, Shen, Zhen, Vargas Valero, Tomás, Sun, Wen Juan, Ruan, Ren Man, Xie, Zhen Da, Qiu, Guan Zhou   +6 more
openaire   +4 more sources

Review : Equation Study of Langmuir and Freundlich Isotherms on Adsorption of Heavy Metal Fe (II) with Zeolite and Activated Carbon from Biomass

Jurnal Kimia dan Rekayasa, 2022
Zeolite and activated carbon can be used as adsorbent of metal ion Fe(II). The activation of zeolite and activated carbon was carried out with various acid and alkaline solutions. The purpose of this literature review is to determine the equation of the Langmuir isotherm and the Freundlich isotherm on the absorption of an adsorbate, namely metal ion Fe
Noviana Sariana Sarana Miri, null Narimo
openaire   +3 more sources

A Unified Sorption Variable for Environmental Applications of the Freundlich Equation [PDF]

Journal of Environmental Quality, 1999
AbstractThe Freundlich equation (x/m = Kf C1/ne) has been used widely in sorption studies in chemistry and environmental research. Two problems arise in comparing sorbate‐sorbent systems if Ce ≠ 1 or if 1/n values differ. First, it is often not possible to compare Kf values from the literature if they were derived from different units of x/m and Ce ...
Z. Chen, B. Xing, W. B. McGill
openaire   +2 more sources

Role of Precipitating Solute Curvature on Microdrops and Nanodrops during Concentrating Processes: The Nonideal Ostwald–Freundlich Equation [PDF]

The Journal of Physical Chemistry B, 2014
The microdrop concentrating process, which is one of the manipulations in the microdrop platform of microfluidic technologies, is a useful technique, especially in biological applications. This process may encounter a solute precipitation within the droplet if the solute reaches its solubility limit.
Fatemeh, Eslami, Janet A W, Elliott
openaire   +3 more sources

Application for fitting of Langmuir and Freundlich equations Studies on the experminatl data of adsorption of Methylene Blue Dye by Cobalt Oxide Surface

Samarra Journal of Pure and Applied Science, 2023
This study is based on the investigation of the adsorption property of Methylene blue  onto Co3O4  as a surface. the optimum conditions of this study were determind and it was found that the dose of Co3O4  was 50 mg, the pH of adsorption dye was 10, the initial concentration of dye was 15 mg/L, and temperature found to be 45 C°.
Neda Ibrahim Mahdi
openaire   +3 more sources

Data for experimental and calculated values of the adsorption of Pb(II) and Cr(VI) on APTES functionalized magnetite biochar using Langmuir, Freundlich and Temkin equations

Data in Brief, 2020
Adsorption isotherms are indispensable tools for the description of sorption processes of pollutants on adsorbents. The closeness of the equilibrium concentration (qe) to the calculated solid phase concentration (qecal) of the adsorbate, together with the co-efficient of determination (R2) and associated errors are important in determining the best ...
Ebenezer C. Nnadozie, Peter A. Ajibade
openaire   +4 more sources