Comparison analysis of linear least-square method and non-linear method of three widely used isotherms (Langmuir, Freundlich, and Redlich-Peterson) were examined to experiment with Remazol Red (C.I. 18221) onto pistachio nut shells at a solution temperature of 293 K. All three isotherm equations showed a better fit to the experimental equilibrium data. The results show that the Langmuir model s...

Activated carbon prepared from Ceiba pentandra hulls, an agricultural solid waste by-product, for the removal of copper and cadmium from aqueous solutions has been studied. Parameters such as equilibrium time, effect of pH and adsorbent dose on removal were studied. The adsorbent exhibited good sorption potential for copper and cadmium at pH 6.0. C=O and S=O functional groups present on the car...

The extraction of chromium(III) from a model waste solution and also from a waste solution of an Indian tannery with Amberlite IR 120 resin is described, and the performance of this resin is compared with other similar resins. The parameters that were optimized include effect of mixing time, pH, loading and elution behaviours of chromium(III) for this resin. Sorption of chromium(III) on Amberli...

Potential adsorption of phenolsmajor pollutants present in various industrial wastewaters onto adsorbent powdered activated mustard cake (PAMC) derived from (mustard cake MC) agriculture waste materials was evaluated. The PAMC had meso porous pore size distribution with surface area (27 m g). The adsorption characteristics of the PAMC primarily attributed to the presence of silica or mixed oxid...

Results of a systematic study on the Ag, Cd and Pb ions sorption characteristics and kinetic properties of an unconventional material produced by introducing sulphydryl functional groups into natural hemp fibers are presented and discussed. The equilibrium data are analyzed using the Langmuir and Freundlich isotherm models. The monolayer sorption capacity of modified hemp is 10.75, 14.05 and 23...

In this study activated carbon prepared from Adathoda vasica stem was used as adsorbent to remove Cu from an industrial waste water. For this purpose, high grade CuSO4.5H2O was used as heavy metal sample. Laboratory experimental investigation was carried out to identify the effect of pH (1.50 – 5.5), agitation time (30-240 min) varying temperature (30-50 ̊C) and varying biomass quantities (2,4,6...

Cobalt silicate precipitation tube (CoSPT), prepared through ‘silica garden’ route was found to be a potential adsorbent for removal of cadmium from aqueous medium. Detail adsorption study of Cd(II) on CoSPT was investigated. Batch adsorption studies were carried out as a function of contact time, adsorbent dose, adsorbate concentration (50-300 mg L-1), temperature (298-323K). Cd(II) loading on...

In this paper, application of sawdust prepared from Narra wood (SD) modified with cationic surfactant of cetyltrimethylammonium bromide (SD/CTAB) was used for removal of two typical acid dyes commercially named as Acid Green 25 (AG25) and Acid Red 14 (AR14) from aqueous solutions. The effects of experimental variables, such as pH, initial dye concentration, adsorbent dose, contact time and temp...

This study aims to investigate the application of two calix[4]arene derivatives named 5,11,17,23-tetra-(t-butyl)-25,26,27,28-tetrahydroxycalix[4]arene (TBCA) and 5,11,17,23-tetra-(t-butyl)-26,27,28-tribenzoyloxycalix[4]arene (TBMTCA) as adsorbents Pb(II) from aqueous solution in a batch system. Adsorption was carried out by varying pH solution, exposure time, concentration. The kinetics evaluat...

Adsorption is considered to be one of the most effective technologies widely used in global environmental protection areas. Modeling of experimental adsorption isotherm data is an essential way for predicting the mechanisms of adsorption, which will lead to an improvement in the area of adsorption science. In this paper, we employed three isotherm models, namely: Langmuir, Freundlich, and Dubin...