Removal of Textile Dyes by Chemically Treated Sawdust of Acacia: Kinetic and Equilibrium Studies

Hanane Tounsadi,Mustapha Taleb,Noureddine Barka,Yousra Metarfi,Zakia Rais

doi:10.1155/2020/7234218

Hanane Tounsadi, Mustapha Taleb + Show 3 more

Open Access

https://doi.org/10.1155/2020/7234218

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Abstract

Sawdust of acacia tree has been successfully used to remove textile dyes from wastewater due to its good sorption properties and its good chemical stability. Two materials are prepared by chemical treatment, including acidic and basic sawdust of acacia. The biosorption tests were carried out on two synthetic dyes of textile which are methylene blue (MB) and brilliant blue (BB). Efficient removal of the both dyes has been achieved by the basic treated sawdust acacia. The modeling of biosorption kinetic shows that the biosorption of MB and that of BB are well described by the pseudo-first-order model for both the chemically treated biosorbents. Equilibrium data have also established using Langmuir and Freundlich isotherm models. Langmuir biosorption capacities are 8.13 and 267.04 mg/g onto basic sawdust acacia and 6.19 and 230.76 mg/g onto acidic sawdust acacia, respectively, for BB and MB sorption. A real final effluent of a textile industry was treated by sorption on both biosorbent basis of sawdust acacia. In fact, the kinetic sorption was rapid with a mass ratio of 1 g/L. However, the biosorption process combined with a biological treatment provides a better result through the physicochemical characteristics of the studied effluent.

Highlights

Sawdust of acacia tree has been successfully used to remove textile dyes from wastewater due to its good sorption properties and its good chemical stability
Two materials are prepared by chemical treatment, including acidic and basic sawdust of acacia. e biosorption tests were carried out on two synthetic dyes of textile which are methylene blue (MB) and brilliant blue (BB)
Efficient removal of the both dyes has been achieved by the basic treated sawdust acacia. e modeling of biosorption kinetic shows that the biosorption of MB and that of BB are well described by the pseudo-first-order model for both the chemically treated biosorbents

Summary

Introduction

Sawdust of acacia tree has been successfully used to remove textile dyes from wastewater due to its good sorption properties and its good chemical stability. Numerous technologies have been developed to treat the dyeing aqueous media, including chemical precipitation [8], ultrafiltration [9], aerobic and anaerobic microbial degradation [10], electrocoagulation/flotation [11], advanced oxidation processes [12], electrochemical treatments [13], reverse osmosis [14], and adsorption [15] whereas most of these methods have proven their effectiveness in the removal of dyes They have limited industrial applications because they are expensive, required high energy consumption and operation time, and in some cases can generate large quantities of secondary sludge, which must be properly treated in order to prevent the environmental contamination [16]. L [18], pectin-Chlorella vulgaris [19], grape pomace [20], banana peel [21], Salvia hispanica [22], peach gum [23], Phragmites australis [24], Pseudomonas aeruginosa [25], Spirulina maxima, and Chlorella pyrenoidosa algae [26]

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