Adsorption of Cationic Dye (Methylene Blue) from Water Using Polyaniline Nanotubes Base

Abstract

Polyaniline nanotubes (PANI NTs) base has been utilized as an adsorbent for the removal of cationic dyes such as methylene blue (MB) from aqueous solution. This observation was evidenced from the measurements of quartz crystal microbalance (QCM) and UV−visible spectroscopy. Experiments were conducted by varying parameters of initial concentration of MB and contact time. The percentage of color removal decreased with the increase of initial dye concentration. Adsorption equilibrium of the dye was reached after 120 min of contact time. Equilibrium data were fit to Langmuir, Freundlich, and Tempkin isotherms, and their constants were determined. The linear correlations coefficient showed that the Langmuir isotherm best fits the MB adsorption data on PANI NTs. The pseudo-first-order, pseudo-second-order, and the intraparticle diffusion kinetic models were applied to the experimental data. It was observed that the pseudo-second-order kinetic model described the adsorption process better than any other kinetic model. Results obtained indicate that PANI NTs could be employed as an efficient adsorbent much more than the conventional PANI powder for dye removal from water.

Treatment of Wastewater Containing Organic Dyes: Recovery of Dye Adsorbed on Starch-Based Materials Through Conversion of Adsorbent into Alcohol

“…It has been reported that in a particular dyeing process 10-15% of dyestuff is generally lost directly to the effluent [1][2][3] . The discharged dyestuff causes potential danger to bioaccumulation 2 .…”

“…It has been reported that in a particular dyeing process 10-15% of dyestuff is generally lost directly to the effluent [1][2][3] . The discharged dyestuff causes potential danger to bioaccumulation 2 . Therefore, design of an effluent treatment plant that can effectively clean industrial effluents without leaving any fragments of dye species and generating secondary wastes during its operation has been one of the prime challenges to the scientific community.…”

An effective removal of methylene blue dye using polyacrylonitrile yarn waste/graphene oxide nanofibrous composite

“…Synthetic organic dyes have been used in various industries such as textiles, tannery, food, and cosmetics, which lead to the pollution of the environment due to their high toxicity and non-biodegradability (Gupta and Suhas 2009). Among the different types of water pollutants, textile dyes are considered to be the most dangerous for the environment (Ayad and Abo El-Nasr 2010;Wong et al 2003). It is estimated that annually 70,000 metric tons of commercial dyes are discharged into wastewater in the worldwide (Auta and Hameed 2011;Nassar et al 2012).…”

Cobalt-doped ZnS-reduced graphene oxide nanocomposite as an advanced photocatalytic material

“…Dyes and pigments have been a subject of much interest in recent years, since the removal of these compounds from wastewater is of great importance [1]. Many of the dyes and their degradation products are toxic and carcinogenic, posing serious hazards to man and the environment [2][3][4].…”