Abstract
Adsorption of methyl orange (MO) using an c montmorillonite has been investigated. Which was used for the first time like an adsorbent for removing anionic dye from aqueous solution, the influences of several parameters such as contact time, adsorbent dose, pH and temperature on the adsorption of methyl orange have been tested. The results showed that nearly 40 min of contact time are found to be sufficient for the adsorption to reach equilibrium. The residual concentration of the dye is determined using UV/Vis Spectrophotometer at wavelength 464 nm. Langmuir and Freundlich isotherm models were used to describe adsorption data. Adsorption kinetics was best described by the pseudo-second order model.
Highlights
The use of synthetic chemical dyes in various industrial processes, such as food, paper, plastic, textile, etc. are one of the most problematic water pollution causes [1]
Several methods are used for eliminating the excess of colored organic pollutants from process or wastes effluents including biological treatments, unsatisfactory results were achieved by these techniques, such as coagulation-flocculation based on the addition of coagulant and flocculants [3], but coagulation generates chemical sludge and doesn’t remove acid and reactive dyes of low molecular weight Biological treatment may involve aerobic and anaerobic degradation by microorganisms [4], Adsorption using activated carbon or ion exchange resins is the most popular technique for dyes removal due to its efficiency but the activated carbon cannot adsorb dispersed and pigmented, dyes these methods are not satisfying because of the weak colorant biodegradability [5,6]
We propose to evaluate the removal efficiency of methyl orange in aqueous solution by adsorption using raw Algerian MMT clay
Summary
The use of synthetic chemical dyes in various industrial processes, such as food, paper, plastic, textile, etc. are one of the most problematic water pollution causes [1]. The different applications of the clay depend on their specific adsorption properties, the ion exchange and the surface nature [8] Due to these qualities, clay is used in different field, like in medical and pharmaceutical industries, organic molecule polymerization [9,10], and pollutant retention such as pesticides, organic, inorganic compounds, heavy metals [11]. The equilibrium of adsorption was modelled by using the Langmuir and Freundlich isotherm models, the kinetic parameters and intra-particle diffusion were determined for the methyl orange – Algerian MMTsystem
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