Ultrasonic treatment of textile dye effluent utilizing microwave‐assisted activated carbon

Abstract

Porous microwave irradiated activated carbon has been developed and its application for time efficient ultrasonic treatment of Congo‐red (CR) dye. The maximum removal efficiency of 97.73% was obtained using developed adsorbent with ultrasound treatment. The optimum parameters for maximum dye removal were obtained that is, contact time of 2 hr, adsorbent dose of 0.2 g, neutral pH, room temperature, and initial CR‐effluent concentration of 10 mg/l. Adsorption isotherms models, kinetics of the process, and thermodynamic analysis have been evaluated to investigate the adsorption performance. The pseudo second order rate kinetics (R2 = 0.99) and Langmuir equilibrium isotherm (R2 = 0.99) were well fitted to the experimental data. It has been found that microwave synthesized method was better technique in terms of energy savings, and ultrasonic treatment approach was efficient technique in terms of operational time. The combination of microwave‐ultrasonic reported to have an adsorptive capacity of 75.75 mg/g with least energy‐cost consuming approach.

High efficiency removal of ibuprofen in water using activated carbon derived from Radix Angelica Dahurica residue

“…Additionally, the adsorption was controlled by the available heterogeneous sites and chemisorption was the rate‐limiting step. It is consistent with reported results that IBP was removed using the metal–organic framework‐derived porous carbon 4,49,50 …”

“…M-RAR-AC was used to investigate the effects of various parameters on IBP removal due to the excellent adsorption efficiency. The effects of the initial IBP concentration (0.05, 0.075, 0.1, 0.2, 0.3, and 0.4 mM), dosage of M-RAR-AC (1.25, 2.5, 5, 7.5, and 10 g/L), temperature (20,30,40,50, and 60 C), pH (7, 8, 8.5, 9, 10, and 11, adjusted by 5% NaOH solution), and rotating speed (0, 50, 100, 150, and 200 rpm) were investigated experimentally.…”

Application of hybrid oxidative processes based on cavitation for the treatment of commercial dye industry effluents

“…Kiran et al [43] studied the use of nickel nanoparticles (Ni-NPs) for the decolorization of reactive yellow 160 dye containing effluent and reported around 91.4% of decolorization at an optimum dye concentration of 0.02%, Ni-NPs dose of 9 mg/L, pH of 7 and temperature of 40 °C. The approach implemented by Maheshwari et al [44] for the treatment of congo-red (CR) dye effluent involved using a combination of US, microwave and activated carbon (AC). The maximum degradation efficiency of 97.73% was demonstrated at a dye concentration of 10 mg/L, AC dose of 200 mg, pH of 7, and room temperature within 2 h of contact time.…”

Adsorptive Elimination of a Cationic Dye and a Hg (II)-Containing Antiseptic from Simulated Wastewater Using a Metal Organic Framework

“…Industrial development is a major contributor to water pollution. Since the very beginning of the industrial revolution, as the industrial sectors have expanded every year, the amount of various hazardous chemicals contaminating groundwater has increased rapidly [ 1 , 2 ]. Different types of dyes are pollutants that add up to a serious issue of water pollution [ 3 ].…”