Adsorption kinetics ofdiazo-dyefrom aqueous solutions by using natural origin low-cost biosorbents

Autor:	Ayse Z. Aroguz, Tuba Şişmanoğlu
Rok vydání:	2014
Předmět:	Maple Langmuir Aqueous solution Chemistry Ocean Engineering engineering.material Pollution chemistry.chemical_compound Adsorption Chemical engineering visual_art visual_art.visual_art_medium engineering Organic chemistry Diazo Freundlich equation Sawdust Pyrolysis Water Science and Technology
Zdroj:	Desalination and Water Treatment. 54:736-743
ISSN:	1944-3986 1944-3994
DOI:	10.1080/19443994.2014.887039
Popis:	In the present study, the adsorption of diazo-dye onto natural origin low-cost biosorbents prepared from pyrolyzed petrified sediment (PPS), pyrolyzed sawdust from maple bark and chitin was investigated in aqueous solution. Trypan blue (TrB) was used as diazo-dye during the adsorption process. Effects of the operational parameters as contact time and type of adsorbents for the removal of TrB were studied using a batch process. The intraparticle diffusion model, the pseudo-first-order and the pseudo-second-order models were used to examine the kinetic data. Dynamic data of the dye adsorption were also fitted to the intraparticle diffusion model well. The order of the uptaken capacities of dye on these adsorbents was found as chitin > petrified sediment > maple sawdust. Langmuir, Freundlich, Temkin models were employed for fitting the equilibrium adsorption data of TrB. Langmuir and Temkin isotherms were found to represent the data best for the adsorption of TrB onto these adsorbents. The adsorption...
Databáze:	OpenAIRE
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