Development of hybrid alginate/ceramic membranes for Cd2+ removal

被引:18
作者
Athanasekou, C. P. [1 ]
Papageorgiou, S. K. [1 ]
Kaelouri, V. [2 ]
Katsaros, F. K. [1 ]
Kakizis, N. K. [1 ]
Sapalidis, A. A. [1 ]
Kanellopoulos, N. K. [1 ]
机构
[1] NCSR Demokritos, Inst Phys Chem, Aghia Paraskevi 15310, Greece
[2] NTU Athens, Dept Chem Engn, Athens 15773, Greece
关键词
Hybrid membranes; Alginates; Retention efficiency; Cd2+ retention; Alginic acid; PHYSICOCHEMICAL TREATMENT; METAL-IONS; BEADS; WATER; CHITOSAN; BEHAVIOR; POLYSACCHARIDES; BIOSORPTION; ADSORPTION; STABILITY;
D O I
10.1016/j.micromeso.2008.07.048
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Multi-layer silica, zirconia and alumina tubular nanofiltration membranes were modified using alginic acid, a natural organic polymer. Polymers of two different molecular weights (MW) were used. The hybrid membranes exhibited a drop of the permeability value of about three and one orders of magnitude for the membranes modified by high 'MW' and low 'MW', respectively, whereas the improvement of Cd2+ retention efficiency was about one order of magnitude in both cases. The modified silica membranes exhibited higher retention factors R%, which was more than 99% for 200 ml yield of clean water from a feeding solution of 100 ppm in Cd2+. The metal binding capacity of both deposited alginic acid co-polymers was proportional to the binding capacity of the alginate beads produced by the same batch of alginic acid. Mercury intrusion measurements revealed that the high MW alginates had deposited mainly into larger pores of the alpha-alumina support (2.5-3 mu m), while the low MW alginate could penetrate into all the succeeding intermediate layers. EDAX analysis revealed the existence of significant carbon content in both succeeding gamma-alumina layers, probably because of the wide MW distribution of the high MW alginate. The retention efficiency of the membrane decreased only by 8% after the first regeneration run and remained constant for 100 ml of cleaned water effluent. (C) 2008 Elsevier Inc. All rights reserved.
引用
收藏
页码:154 / 164
页数:11
相关论文
共 26 条
[1]  
Adamson AW, 1990, Physical chemistry of surfaces, V5th
[2]   Biosorption of Hg2+, Cd2+, and Zn2+ by Ca-alginate and immobilized wood-rotting fungus Funalia trogii [J].
Arica, MY ;
Bayramoglu, G ;
Yilmaz, M ;
Bektas, S ;
Genç, Ö .
JOURNAL OF HAZARDOUS MATERIALS, 2004, 109 (1-3) :191-199
[3]   Investigation of water uptake behavior and stability of calcium alginate/chitosan bi-polymeric beads: Part-1 [J].
Bajpai, S. K. ;
Tankhiwale, Rasika .
REACTIVE & FUNCTIONAL POLYMERS, 2006, 66 (06) :645-658
[4]   Investigation of swelling/degradation behaviour of alginate beads crosslinked with Ca2+ and Ba2+ ions [J].
Bajpai, SK ;
Sharma, S .
REACTIVE & FUNCTIONAL POLYMERS, 2004, 59 (02) :129-140
[5]   Disulfide disproportionation and CdS formation upon cadmium sorption on FeS2 [J].
Bostick, BC ;
Fendorf, S ;
Fendorf, M .
GEOCHIMICA ET COSMOCHIMICA ACTA, 2000, 64 (02) :247-255
[6]   Enhanced retention of neutral solute and charged solute with NF inorganic membrane by chemical grafting and physico-chemical treatment [J].
Bouguen, A ;
Chaufer, B ;
Rabiller-Baudry, M ;
Michel, F .
SEPARATION AND PURIFICATION TECHNOLOGY, 2001, 25 (1-3) :513-521
[7]   A review of the biochemistry of heavy metal biosorption by brown algae [J].
Davis, TA ;
Volesky, B ;
Mucci, A .
WATER RESEARCH, 2003, 37 (18) :4311-4330
[8]   Use of porosity to estimate hydraulic properties of volcanic tuffs [J].
Flint, LE ;
Selker, JS .
ADVANCES IN WATER RESOURCES, 2003, 26 (05) :561-571
[9]  
FRANCIS AL, 1975, AICHE J, V21, P307
[10]   Preparation of alginate-chitosan hybrid gel beads and adsorption of divalent metal ions [J].
Gotoh, T ;
Matsushima, K ;
Kikuchi, KI .
CHEMOSPHERE, 2004, 55 (01) :135-140