Organic dye removal by combined adsorption—membrane separation process

Abstract

ab s t r ac tWastewater reuse is one of the principal tasks of modern industry. For this purpose several physical, chemical and combined methods have been used. This contribution deals with the study of combined adsorption-membrane separation process in water treatment. The hollow fiber membrane microfiltration dead-end process combined with adsorption on powdered activated carbon (PAC) was used to separate organic dye from water solutions. Adsorption characteristics of organic dye Egacid Red G200 on PAC were studied in batch experiments. From the experimental data the parameters of Langmuir, Freundlich and Sips adsorption isotherms were evaluated. The Langmuir type kinetic model was investigated to find the best-fitted model for the experimental data obtained. During the submerged hollow fibre membrane microfiltration operated in dead-end mode it was found that the membrane was effective for removal of PAC particles from water suspensions. Only limited membrane fouling was observed in the range of variables tested. From this study it is evident that the combined membrane process has a potential application for organic dye removal.

Application of Wasted Oolong Tea as a Biosorbent for the Adsorption of Methylene Blue

“…erefore, the removal of dyeing wastewater from aqueous solution is of great importance and crucial. Many techniques have been developed to treat dyeing wastewater including biological treatment, chemical degradation, membrane separation, and catalytic oxidation [5][6][7][8]. Among these treatments, adsorption has been considered as one of the effective and lowcost processes for dyeing removing from wastewater.…”

Removing Cationic Dye from Aqueous Solutions Using as-grown and Modified Multi-Walled Carbon Nanotubes

“…Various methods such as coagulation/flocculation [2], biodegradation [3], adsorption [4][5][6], membrane separation [7], photocatalysis [8][9][10], and ozonation [11] have been used for removal of synthetic dyes from waters and wastewaters. Among all these methods, adsorption has been found to be one of the most common techniques for dye removal because of its easy operation and effectiveness.…”

Microwaves initiated synthesis of activated carbon-based composite hydrogel for simultaneous removal of copper(II) ions and direct red 80 dye: A multi-component adsorption system

“…Diverse approaches have been employed for the treatment of wastewaters contaminated by heavy metals and dyes [10][11][12][13][14]. However, the treatment of these pollutants (i.e., heavy metalsdyes) in multi-component system is complex and required effective purification processes [15][16][17].…”