Application of tubular ceramic nanofiltration membranes for textile waste water desalination için kapak resmi
Application of tubular ceramic nanofiltration membranes for textile waste water desalination
Başlık:
Application of tubular ceramic nanofiltration membranes for textile waste water desalination
Yazar:
Yaldız, Safiye, author.
Yazar Ek Girişi:
Fiziksel Tanımlama:
xiv, 85 leaves: color illustraltions.+ 1 computer laser optical disc.
Özet:
Textile industry generates coloured wastewater containing a significant level of dye/inorganic salts. Environmental concerns and efficient energy use make the recovery of reusable water and salts from textile wastewater vital globally. Ceramic nanofiltration (NF) membranes are becoming increasingly important for the recovery and purification of dyes and salts (e.g., NaCl) in high salinity waste streams. They have superior chemical/mechanical/thermal properties compared to their polymeric counterparts. Desalination performances of the ceramic NF membranes depend on the concentration and chemical structure of the target ions, pH of feed and the wastewater stream along with the chemical/surface/nanostructural properties of the selective NF layer. Metal oxides are generally used as NF layer materials due to their amphoteric behaviour. Repulsive/attractive forces between the ionic species in the solution and the NF layer may make the separation of ionic species possible. In this work, zirconia doped titania based NF layers were designed. Desalination experiments were conducted with 10-3 M Na2SO4 and MgSO4 salts at different pH values. Salt retention capacities of 5 different membranes were determined. Percent retention was calculated using ion concentrations in permeate and retentate streams. The Mg2+ and SO4 -2 ion concentrations were determined by titration with 0.01 M EDTA and by spectrophotometer at 420 nm, respectively. A clear pH dependency of the salt retention was found in filtration tests. The highest SO4 -2 and Mg+2 ion retentions were obtained with using MF+disperel (boehmite)+P2 (600 0C)+TTIP hydrosol+Ti/Zr polymeric (double layer) membrane as 95% and 91%, respectively.
Yazar Ek Girişi:
Tek Biçim Eser Adı:
Thesis(Master)--İzmir Institute of Technology: Chemical Engineering.

İzmir Institute of Technology: Chemical Engineering--Thesis (Master).
Elektronik Erişim:
Access to Electronic Versiyon.
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