Treatment of Effluents from the Textile Industry through Polyethersulfone Membranes

Rodholfo Da Silva Barbosa Ferreira,Vanessa Da Nóbrega Medeiros,Hélio De Lucena Lira,Sandriely Sonaly Lima Oliveira,Edcleide Maria Araújo,Aline Florindo Salviano

doi:10.3390/w11122540

Rodholfo Da Silva Barbosa Ferreira, Vanessa Da Nóbrega Medeiros + Show 4 more

Open Access

https://doi.org/10.3390/w11122540

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Journal: Water	Publication Date: Dec 1, 2019
Citations: 7	License type: CC BY 4.0

Affiliation: Universidade Federal de Campina Grande

Abstract

Membranes have been widely used in the treatment of industrial effluents. However, there are still some limitations in the separation and permeability with respect to these effluents. Therefore, this study investigated the addition of 1% and 5% of an inorganic filler (clay) in polyethersulfone polymer membranes. By contact angle analysis, it was observed that the clay influenced the hydrophilicity of the membrane. The presence of the clay had an important role in the morphology of the membrane, modifying and favoring a greater quantity of pores and macropores for the porous support. For the tensile test, it was seen that the high clay content decreased the membranes properties. The flow tests, having a flow stabilized around 300 L/h·m2 for membranes containing clay, evidenced the efficiency of the membrane for the treatment of indigo blue, representing a 200% increase in relation to polyethersulfone membrane. The membrane containing 1% of clay presented the highest level of rejection to the effluent, around 94.0%. Thus, it was evident that the addition of montmorillonite clay modified the membrane structure contributing to a higher selectivity and permeability.

Highlights

The world has turned to the process of membrane separation due to its benefits to industrial processes
Membranes have played an important role in the textile industry systems, especially in the treatment of effluents from the dyeing process where the amount of dye is present in a high percentage [4]
Several polymers have been prominent in the manufacture of membranes, such as polyethersulfone (PES), polysulfone (PSU), and polyamide, polyvinylidene fluoride (PVDF) [7]

Summary

Introduction

The world has turned to the process of membrane separation due to its benefits to industrial processes. The advantages of membrane separation include its low energy consumption, high efficiency in separation with its selective permeation, and non-thermal processing of sensitive composite products [1,2]. In this context, membranes play an extremely important role, especially in the field of water and sewage treatment [3]. Membranes have played an important role in the textile industry systems, especially in the treatment of effluents from the dyeing process where the amount of dye is present in a high percentage [4]. Several polymers have been prominent in the manufacture of membranes, such as polyethersulfone (PES), polysulfone (PSU), and polyamide, polyvinylidene fluoride (PVDF) [7]

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