Kinetic studies on adsorption behavior of methyl orange using modified halloysite, as an eco-friendly adsorbent

Abstract

In this work, modified halloysite was successfully prepared and its adsorptive capacity was studied using methyl orange dye solution. The adsorption behavior was systematically performed as a function of initial dye concentration and time. The halloysite-mineral (Al 2 O 3 •2SiO 2 •4H 2 O) used in this study was an aqueous alumino silicate mineral consisting of layers with similar structural composition and was gathered from the Biga Peninsula, Western Anatolia. Characterization of the prepared material was examined using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and Differential Thermal Analyzer (DTA). The adsorptive capacity of the modified halloysite in methyl orange was increased by increasing the contact time and initial dye concentration. Lagergren pseudo first-order and pseudo second-order kinetics were performed and pseudo second-order model was found to be the best fit model for the adsorption kinetic. Langmuir, Freundlich, Sips and Dubinin-Radushkewich isotherm models were applied to the experimental data to find the suitable model for describing the adsorption equilibrium. Unmodified-clay was also used in the adsorption process of methyl orange to compare the adsorptive property of the modified-clay. It was found that modified halloysite performed better as an adsorbent than untreated clay for the adsorption of methyl orange.

Ni/Zn Layered Double Hydroxide (LDH) Micro/Nanosystems and Their Azorubine Adsorption Performance

“…The adsorption isotherm was used to represent the adsorption capacity at different solution concentrations that helps to have idea on the adsorbent and adsorbate interaction. The experimental results were fitted using Langmuir [33] and Freundlich [34] models. The Langmuir isotherm (Equation (3)) assumes a monolayer adsorption of the adsorbate on the adsorbent surface using a given relation:…”

Use of <i>Eichhornia Crassipes</i> as a Bioadsorbent for the Removal of Methyl Orange and Methylene Blue Present in Residual Solutions

“…This has caused several problems due to toxicity, low biodegradation on the entire ecosystem around this discharge of the dyes due to their direct interference in the photosynthesis process, in addition to causing various diseases to humans in the skin and respiratory system [Panneerselvam et al, 2021;Marquez et al, 2021;Amalraj et al, 2021;Bożęcka et al, 2021]. Dyes are divided into anionic (acid dyes), nonionic (dispersed) and cationic (basic dyes), among them are methyl orange (MO) and methylene blue (MB) which have a similar molecular mass [Kadhom et al, 2020;Lacin et al, 2020;Uddin et al 2021]. MB is a cationic dye used in different products as chemical, medical, and biological applications its chemical structure makes it difficult to remove [Amalraj et al, 2021;Bożęcka et al, 2021;Kadhom et al, 2020] and MO is an anionic dye that is used for dyeing and due to its poor biochemical purification it is very difficult to degrade [Zhang et al, 2019;Amalraj et al, 2021;Bożęcka et al, 2021].…”

“…There are conventional adsorbents such as clays, zeolites, low-cost and high-abundance mesoporous materials, however, the search for new materials that have a similar adsorption capacity and a high removal percentage has been carried out in recent decades [Lacin et al, 2020;Márquez et al, 2021;Amalraj et al, 2021], The agro-industrial waste have a very low cost such as peanut shells, wheat, tamarind, rice, orange, egg, walnut, etc., have been shown to have a removal capacity very similar to conventional adsorbents for the elimination of heavy metals, dyes, etc. [Saini et Within the management of plants for the adsorption process, one that has attracted attention is the Water Lily (Eichhornia crassipes), wich is a freshwater plant that floats freely in rivers, lakes, a lagoon that has high available due to its rapid growth and its great adaptability to many ecosystems, causing it to become an invasive species since it increases the evapotranspiration process and, interferes with human activities causing economic losses [Priya et al, 2017;Tabinda et al, 2019;Panneerselvam et al, 2021].…”

Statistical Optimization and Modeling Approach for Fenton‐like Discoloration of Methyl Orange using Green Zero‐valent Iron Nanoparticle Catalysts

“…Table 1 describes the comparative study for the maximum adsorption of MO using NZVI‐NPs and some other different types of adsorbents used for MO adsorption [9,15,36–48] . Each adsorbent showed a different adsorption performance because the experimental conditions were found to be different for each adsorbent.…”

“…types of adsorbents used for MO adsorption. [9,15,[36][37][38][39][40][41][42][43][44][45][46][47][48] Each adsorbent showed a different adsorption performance because the experimental conditions were found to be different for each adsorbent. It could be analyzed that the selected NZVI-NPs showed excellent adsorption performance for MO and is comparable with a few different types of adsorbents testified in the past studies.…”