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|Title:||Development of porous alumina membranes for treatment of textile effluent|
|Author(s):||Silva, Késia Karina O. S.|
Paskocimas, Carlos A.
Oliveira, Fernando R.
Nascimento, José Heriberto Oliveira do
|Publisher:||Taylor & Francis|
|Journal:||Desalination and water treatment|
|Citation:||Késia Karina O.S. Silva, Carlos A. Paskocimas, Fernando R. Oliveira, José H.O. Nascimento & Andrea Zille (2016): Development of porous alumina membranes for treatment of textile effluent, Desalination and Water Treatment, DOI: 10.1080/19443994.2015.1018333|
|Abstract(s):||Ceramic porous membranes sintered at two different temperature using polyvinyl alcohol and ethylene glycol as binders, and composed of two types of α-alumina with different particle sizes were investigated for the microfiltration of a textile effluent containing indigo dye, auxiliaries, heavy metals, oils, and solids. The physicochemical properties of the membranes and effluent were evaluated. X-ray diffraction, energy dispersive X-ray fluorescence spectroscopy, differential scanning calorimetry, and thermogravimetric analysis confirm that the thin membrane is composed of high crystalline and pure α-alumina. Scanning electron microscopy observation indicates that the membranes have smooth porous surface making it suitable for microfiltration applications. The membrane sintered at 1,450˚C exhibited higher water absorption (WA) and apparent porosity than that sintered at 1,475˚C. The apparent specific gravity and flexural strength are in inverse correlation with the WA due to the enhanced densification of the membranes. The filtered effluent was evaluated using a membrane with an average pore size of 0.4 μm and a total porosity of 29.6%. The average values of rejection were 90% for color, 93% for suspended solids, 95% for turbidity, 60% for metals, and 73% for chemical oxygen demand. These results demonstrate that low-cost ceramic alumina membranes are a very promising advanced treatment for textile industrial effluents.|
|Description:||Published online: 27 Feb 2015|
|Appears in Collections:||DET/2C2T - Artigos em revistas internacionais com arbitragem científica|
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