Adsorption Performance of Dyes Over Zeolite for Textile Wastewater Treatment

Abstract

Removal of textile dyes from wastewater have recently attracted much attention, due to the toxicity, difficult visibility, and thereby the negative consequences on the aqueous environment. Therefore, there have been diverse promising new techniques such as adsorption for dyes removal from industrial wastewater. Compared to the highly cost treatment techniques, removal of dyes using the adsorption process is relatively simple and requires less cost. Synthetic zeolite was used in this research as a high capacity nano-adsorbent for the removal of reactive dyes from coloured wastewater. The impact of main parameters: dose of adsorbent (0.0025 to 0.02 g), pollutant concentration (25 to 200 mg/L), contact time (10 to 120 minutes), degree of agitation (25 and 300 rpm), and solution pH (2 to 8) on adsorption performance of the synthesised zeolite was investigated. The optimum values of these parameters to remove dyes efficiently at 90 % removal were 0.02 g, 200 mg/L, 80 min, 300 rpm, and 6-7 respectively. Also, two models were evaluated, the Langmuir and Freundlich isotherms. Langmuir isotherm was more efficient for representing the data than the Freundlich. The results of the Langmuir isotherm gave KL = 0.08 L/mg, qm = 6.02 mg/g, and R 2 = 0.98, which fitted to the adsorption data of zeolite. Reactive dye adsorption by synthetic zeolite is a vital tool in identifying the fate of dye removal from industrial wastewater treatment plants.

Adsorption of anionic and cationic dyes from aqueous solutions on fly ash-based porous geopolymer

“…Application of activated carbon from bamboo as adsorbent for wastewater from textile industry had showed efficiency of 91.84% (Salleh et al, 2011). Meanwhile, application of zeolite and fly ash adsorbents on textile wastewater had showed efficiency of 90% and 40-90%, respectively (Hammood et al, 2021;Saini, 2017).…”

Preparing Shrimp Shell-Derived Chitosan with Rice Husk-Derived Biochar for Efficient Safranin O Removal from Aqueous Solution

“…A growing interest in adsorption processes for vigorously removing organic dyes has been observed recently, mainly due to their versatility, effectiveness, easy operating and low cost (Alguacil et al 2021). Different adsorbents generally used for dye removal are activated carbon (Kheddo et al 2020), zeolite (Hammood et al 2021), biochar (Sutar et al 2022), clay (Kausar et al 2018), and metal-organic framework (Uddin et al 2021). Various studies have proven that biochar has a great potential for organic dye removal in aquatic systems.…”

“…Various studies have proven that biochar has a great potential for organic dye removal in aquatic systems. Nevertheless, biochar has been found to be an inconsistent adsorbent because of its heterogeneous nature, high pH and negatively charged surface [12]. To address these restraints, new trends in activation and modification of biochar have been developed in recent years.…”

Textural Properties Characterization for NaX and FeX Zeolites by Nitrogen Adsorption-desorption Technique

“…Water and exchangeable cations may fill zeolite's crystal and porous form, which has a particular pore size [4]. Zeolites are widely employed in a wide range of applications; they can be used as adsorbents [5][6][7], sorbents for dyes [8,9], heavy metals [10], and other contaminants in wastewater and natural water [11], molecular filter [12], ion-exchange compounds [13,14], catalyst [15][16][17]. The textural properties of zeolites significantly affect their effectiveness in industrial processes.…”