Modified sorption materials were produced by treating earleaf acacia ( Acacia auriculiformis ) bark with low-concentration (1-3%wt) sulfuric acid solutions. The properties of native and modified for zinc (II) ions studied. Based on the values initial equilibrium concentrations in solution, materials' capacity (A, mmol/g) was found adsorption isotherms plotted. It that are type I according to IU...

This study aims to evaluate the adsorption isotherm of carbon microparticles prepared from pumpkin (Cucurbita maxima) seeds for adsorbing curcumin (as a model dye). The results were derived and compared using kinetics approach based on several standard models, namely Langmuir, Temkin, Freundlich, Dubinin-Radushkevich models. second aim is effects particle size (from 100 1000 mm) characteristics...

This paper presents the results of studies for niobium sorption from chloride solutions with use anion-exchange organic sorbents: Amberlite IRA-67, Purolite A-100, AB-17-8, and AN-2FN. Niobium was performed model niobium-containing solutions. Data on comparative characteristics studied sorbents were obtained, static exchange capacity sorbents, values distribution coefficients, extraction degree...

Acid-activated Nibo clay was applied as an adsorbent in the bleaching of crude palm oil. The collected sample activated with hydrochloric acid solution after it sun-dried and ground. raw (NC) (ANC) samples were characterized using XRF, SEM, FTIR analyses. efficiency process examined by varying dosage, temperature contact time. results analyses on NC ANC showed that clays kaolinites significant ...

abstract background: at present study, acid modified banana leaf ash was used as an adsorbent for the successful removal of reactive black 5 (rb5) dye from aqueous environments. materials and methods: the effect of various operating parameters such as ph of solution, dye concentration, contact time, adsorbent dosage, and the temperature was investigated. results: maximum adsorption capacity of ...

the adsorption characteristics of riboflavin onto silver-deposited iron oxide magnetic nanoparticles (ag/fe3o4) have been described. characterization of the synthesized ag/fe3o4 nanoparticles was achieved by ftir spectra, tem image and xrd pattern. the influence of several experimental parameters such as nanoparticles dosage, ph of the sample solution, different orientations of the riboflavin m...

background : hexavalent chromium ( cr (vi)) is an important contaminant in surface and groundwater and its removal from contaminated water and wastewater has received interest in recent years. this study aimed to explain the removal process of cr (vi) from aqueous solution using nano hydroxyapatite (n-hap) as an adsorbent material. methods: cr (vi) removal experiments with the prepared n-hap we...

The efficient removal of the antibiotic ciprofloxacin (CIP) from aqueous samples using magnetic nanosorbents prepared three sulfated polysaccharides, κ-, ι- and λ-carrageenan an alkoxysilane agent containing a reactive epoxide ring is described. were characterized in detail FTIR spectroscopy, solid-state 29Si 13C NMR spectroscopy elemental microanalysis. synthesis method was more effective for ...

Abstract The present research evaluates the influence of modification smectite clay (BC) on its adsorption capacity anionic dyes from aqueous solutions. Thermal (BC 250), acidic H 2 SO 4 ), and alkaline NaOH) was carried out. clays were characterized by X-ray powder diffraction, energy-dispersive spectroscopy, Fourier transform infrared spectroscopy. Adsorption investigated batch experiments at...