Removal of Methylene Blue from Aqueous Solutions by Surface Modified Talc

Abstract

In this study, raw talc powder surface modification was conducted, and the powder was modified in two different methods using acid washing and ball milling. Modified talc was characterized by X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). In order to investigate the adsorption capacity of modified talc on dyes, adsorption experiments were carried out with methylene blue (MB) in aqueous solutions as the target contaminant. The findings of the characterization revealed that both modifications increased the adsorption capacity of talc, which was attributed to changes in specific surface area and active groups. The influence of process parameters such as contact time, pH, dye concentration, and adsorbent dosage on the adsorption performance was systematically investigated. Modified talc was able to adsorb MB rapidly, reaching equilibrium within 60 min. Additionally, the adsorption performance was improved as the pH of the dye solution increased. The isotherms for MB adsorption by modified talc fitted well with the Langmuir model. The pseudo-second-order model in the adsorption kinetic model properly described the adsorption behavior. The results show that the modified talc can be used as an inexpensive and abundant candidate material for the adsorption of dyes in industrial wastewater.

Study adsorbents based on bent-Al13-CS-CTA and its application to the removal of CR from wastewater

“…A 722G spectrophotometer was used to measure the absorbance, which records the characteristic absorption peak of CR at 498 nm. 29 The mixture was stirred on a stir plate at 600 rpm for 60 minutes. The study investigated the impact of varying dosages of bent-Al 13 -CS-CTA (0.5–3 g L −1 ), pH levels ranging from 3 to 11, contact durations from 10 to 150 minutes, initial CR concentrations ranging from 200 to 1400 mg L −1 , and temperatures of 25 °C, 35 °C, and 45 °C on the effectiveness of the adsorbent.…”

Adsorption of Rhodamine B in Aqueous Solution by Mg/CS Composite Modified Attapulgite

“…This was calculated as the difference between the initial concentration of the solution of Rh B and the measurements to determine the optimum adsorption capacity q e (mg/g). The most appropriate adsorption factors were discovered through investigation of the effects of pH (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12), adsorbent dosage (0.5-5 g/L), adsorption the period (0-90 min), temperature (25-35 • C), and launching dye concentration (50-90 mg/L) on the method of adsorption in the ensuing batch experiments. When repeating the experiment, 0.2 g of AP with an initial concentration of 300 mg/L Rh B at pH of 4 was added, 25 • C, and stirred for half an hour.…”

“…The dye manufacturing industry's fast expansion has led to an explosion in the discharge of dye effluent, which has gradually increased environmental pollution and posed a major threat to human health. Due to its complex chemical structure, high stability, and poor biodegradability, dyes are difficult to degrade through light, chemical, and biological treatment [1][2][3]. Adsorption is a beneficial remediation process that is used not only for bacterial inactivation but also for removing pollutants from water [4,5].…”