High surface area and highly mesoporous activated carbon fibers (ACF) were obtained by physical activation of natural precursors (vetiver roots and bagasse) with steam and chemical activation using phosphoric acid. The textural characteristics of the activated were determined by nitrogen adsorption study and mercury porosimetry and showed that interesting porosity were obtained (SBET up to 1600...

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 adsorbents potential ZnAl-LDH, ZnAl-Hydrochar, and ZnAl-Humic acid were prepared using the coprecipitation method. characterization by XRD, FTIR, BET analysis. XRD peaks of ZnAl-LDH at 10.29°, 20.07°, 29.59°, 32.12°, 34.02°, 48.06°, 60.16°. FTIR absorption peak was observed 3400-3500 cm−1, 1600-1700 1381 1000 500-700 cm−1. All exhibited N2 adsorption-desorption isotherms type IV classified ...

This paper examines the effects of multicycles desorption/adsorption on water isotherms a typical cement–bentonite mixture. These were evaluated over relative humidity (RH) range 90% and 0.3%. study shows that, after first adsorption–desorption cycle, subsequent cycle shifted isotherm curves upward, particularly at RH < 70%, with high degree hysteresis. In contrast, > slightly downward lo...

varieties of st. john’s wort (hypericum perforatum l.) native to iran possess the largest percentage of hypercin in their leaves and flowers. isotherm curves show the relationship between the relative humidity and moisture content of the plant at a constant temperature. it is essential to understand the isotherms curves for successful storage and drying of the plant. this study used adsorption ...

Reaction of Cr(CO)(6) with trimesic acid in DMF affords the metal-organic framework Cr(3)(BTC)(2).nDMF (BTC(3-) = 1,3,5-benzenetricarboxylate), which is isostructural to Cu(3)(BTC)(2).3H(2)O. Exchanging DMF for methanol and heating at 160 degrees C under dynamic vacuum for 48 h results in the desolvated framework Cr(3)(BTC)(2). Nitrogen gas adsorption measurements performed at 77 K revealed a t...

Activated carbon prepared from Tamarindus Indica fruit shells has been used for the removal of two basic dyes, namely, rhodamine B and malachite green from aqueous solutions. Freundlich, Langmuir and Redlich-Peterson isotherm equations were used to fit the equilibrium adsorption data and the isotherm parameters were evaluated. The Langmuir monolayer adsorption capacity was found to be 3.1 mg/g ...

bokbunja seed wastes from a wine manufacturing industry were used to prepare carbon for the purpose of using it as an adsorbent for the removal of reactive blue 4 from aqueous solutions. a part of prepared carbon was treated with n-hexane to remove the seed oil present in large amounts in bokbunja seeds. it was found that the hexane treated carbon was more efficient in removing the dye from aqu...

The development of layered double hydroxide materials into composites with carbon-based in the form CaAl-Biochar and MgAl-Biochar has been successfully carried out. success parameters preparation process include XRD, FT-IR, Adsorption-Desorption N2, SEM, TG-DTA. through XRD is evidenced by appearance typical diffraction peaks double-layer hydroxy around 2???? = 11°(003), 20°(006), 60°(113). In ...