Surface modification of polyethersulfone membranes by catechol and polyethyleimine to removal reactive dyes from textile wastewater
September 11-16, 2016
The application of ionic adsorbent to the microfiltration membrane to remove reactive dyes from industrial wastewaters from cotton dyeing process is an environmentally friendly technique which allows significant reductions in energy consumption as compared with the conventional process required for the removal of these dyes the nanofiltration membranes This work studies the co-deposition of catechol and polyethyleneimine on porous polyethersulfone microfiltration membranes (PMM), and their application to removal of color from textile effluents. The PMM was a commercial product from Sartorious Stedim Biotech, with an average pore size of 0.2 µm, hydrophobic. Catechol (Cc) and Polyethyleneimine (PEI) were dissolved in Tris buffer solution and the concentration of catechol was fixed at 1 mg mL-1. PMM samples were pre-wetted and then immersed into the freshly prepared reaction solutions (1 : 0.2 and 1 : 0.5 ratio of Cc-PEI). This method is adapted already described in literature, and the textile industry wastewater dyeing result from a trichromy of Novacron® reactive dyes. Until now, the characterization/monitoring of the membranes was realized by FT-IR/ATR (wavenumber 600 – 4000 cm-1), hydraulic permeability, hydraulic flux, membrane resistance, UV-VIS. absorption (436, 525 and 620 nm), pH and conductivity. The experiments were carried in a stirred cell (Sterlitech®, model HP 4750). Filtrates were collected until 25 minutes, for each experiment, the filtration was repeated 3 times with the same membrane and during all experiments. The driving force is the height of the water/wastewater column in stirred cell (7 cm) and the pH of industrial wastewater is not adjusted (pH 9,7).
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Maria Teresa Pessoa de Amorim, "Surface modification of polyethersulfone membranes by catechol and polyethyleimine to removal reactive dyes from textile wastewater" in "Advanced Membrane Technology VII", Isabel C. Escobar, Professor, University of Kentucky, USA Jamie Hestekin, Associate Professor, University of Arkansas, USA Eds, ECI Symposium Series, (2016). http://dc.engconfintl.org/membrane_technology_vii/76