The evaluation of removal of Acid Violet 17 dye from aqueous solution by Single Walled Carbon Nanotubes

A large part of Organic compounds, causing Pollution in natural waters, are Chemical dyes. Acidic dyes have extensive Applications in different Industries. Colored wastewater discharge causes serious environmental problems due to their high toxicity and aggregation in environment. The aim of this study is the investigation of the use of Single Walled Carbon Nanotubes (SWCNTs) as adsorbent at Acid Violet 17 dye adsorption process from aqueous solutions.
This experimental study has been done in batch system in which the effects of Variations such as Acid Violet 17 dye concentration, dose of nanotubes, pH and contact time has been investigated in removal of dye. The dye concentration in the samples was measured using UV/Visible spectrophotometer model SP-3000 Puls-Japan and Construction of calibration curve at a wavelength of 587 nm. adsorption Isotherm has also been analysised using Freundlich, Langmuir theory.
the results show that by decreasing dye initial concentration from 100 to 25 mg/l, removal efficiency is increased from 74.7 to 93.7%. by increasing the adsorbent dose from 0.4 to 0.8 gr, removal efficiency of dye is increased from 93.7 to 98.7%. Maximum surface adsorption of dye was observed to be 18.675 mg/gr. appropriate time for receiving equalization state of Acid Violet 17 dye adsorption is 3 hours.
Due to small size, unique network arrangement, large surface area, very high reactivity and consequently noticeable performance as an adsorbent in removal of organic pollutants from aqueous solutions, Single Walled Carbon Nanotubes could be effective for removal of Acid Violet 17 dye.