نتایج جستجو برای: sorption thermodynamic
تعداد نتایج: 51801 فیلتر نتایج به سال:
Investigation of uptake capacity of by nitrated biomass of Cicer arientinum(Bngal gram) is conducted in batch conditions. The effect of different parameters such as contact time, sorbent dose, pH and temperature has been studied. Adsorption kinetic modeling data were found out. The kinetics of biosorption results shows that sorption process is well explained by pseudo–second order model with de...
Sorption kinetic studies of ammonium from aqueous solution on different inorganic and organic media.
In this study, the sorption of ammonium from aqueous solution onto activated carbon, natural zeolite, peat and potting soil was studied by performing batch kinetic sorption experiments. The activated carbon wasn't efficiently removing ammonium at concentrations higher than 50 mg L(-1). Sorption isotherms of ammonium on zeolite, peat and potting soil were determined at 25 degrees C and 200 rpm w...
Arsenic is an example of a heavy metal usually present in different types of industrial effluents. It is also responsible for environmental pollution and toxicity. Temperature and particle size are very crucial parameters in adsorption reactions. The effects of these two parameters on the bioremediation of As (III) from aqueous solution using modified and unmodified coconut fiber was investigat...
Biochars (BC) generated from biomass residues have been recognized as effective sorbents for organic compounds. In this study, biochars as adsorbents for the removal of norfloxacin (NOR) from aqueous solutions were evaluated. Biochars were prepared from cassava dregs at 350 °C, 450 °C, 550 °C, 650 °C, and 750 °C, respectively (labeled as BC350, BC450, BC550, BC650, and BC750). The results showe...
Novel biosorbent 'maize bran' has been successfully utilized for the removal of Cr(VI) from aqueous solution. The effect of different parameters such as contact time, sorbate concentration, pH of the medium and temperature were investigated and maximum uptake of Cr(VI) was 312.52 (mgg(-1)) at pH 2.0, initial Cr(VI) concentration of 200mgL(-1) and temperature of 40 degrees C. Effect of pH showed...
Identifying the parameters that can impact sorption of drugs to polymer materials is critical design medical devices which would prevent drug loss by sorption. We propose a combined approach based on advanced molecular simulations and liquid chromatography experiments investigate adsorption active pharmaceutical ingredients (API) onto plasticized PVC materials. The thermodynamic characterizatio...
The present study describes the adsorption of textile dye on rice hull. The adsorption parameters were obtained from Langmuir and Freundlich isotherms utilizing linear regression plots to fit the data. The results showed that Langmuir equation was more suitable than the Freundlich one to predict the experimental adsorption isotherms, indicating that the adsorption of dye molecules is localized ...
In this work, Cs ion sorption on some clays and zeolite were investigated. Cs was used as a tracer. Activities were measured with a NaI crystal gamma counter. The particle size distribution was determined by a laser sizer. Surface area of the particles were determined by BET (Brunauer, Emmett and Teller method). Structure analysis was made by using X-ray diffraction. The chemical compositions o...
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