Removal of heavy metal ions by nanofiltration

被引:444
作者
Al-Rashdi, B. A. M. [1 ]
Johnson, D. J. [1 ]
Hilal, N. [1 ,2 ]
机构
[1] Swansea Univ, Ctr Water Adv Technol & Environm Res CWATER, Multidisciplinary Nanotechnol Ctr, Swansea SA2 8PP, W Glam, Wales
[2] Masdar Inst Sci & Technol, Abu Dhabi, U Arab Emirates
关键词
Heavy metals; Nanofiltration membrane; Rejection; Permeate flux; Feed pH; Membrane fouling; Membrane characterisation; Membrane filtration; Water purification; Atomic force microscopy; AFM; FLUX DECLINE; WASTE-WATER; AQUEOUS-SOLUTIONS; NF MEMBRANES; PERFORMANCE; ADSORPTION; REJECTION; RETENTION; CHARGE; COPPER;
D O I
10.1016/j.desal.2012.05.022
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
This study describes the rejection of heavy metal ions using a commercial nanofiltration membrane (NF270). The effect of feed pH, pressure and metal concentration on the metal rejections and permeate flux and in some cases permeate pH was explored. The results showed that with all metals examined (except As (III)), when the feed pH is below the isoelectric point, the rejection increased. NF270 rejected almost 100% of copper ions at low concentrations, but decreased to 58% at the highest concentration examined. Using 1000 mg/L concentration level, pH = 1.5 +/- 0.2 and 4 bar the rejection was 99%, 89% and 74% for cadmium, manganese and lead respectively. However at pH above the isoelectric point the average rejections decreased. NF270 was unable to retain As(III). The metals caused a flux decline due to membrane fouling in the order of severity: Cu2+ >Cd2+ approximate to Mn2+ > Pb2+ approximate to As3+. The correlation between adsorbed amounts of the metals onto NF270 with the normalised flux shows that as the amount increased the normalised flux decreased, except for arsenic that had a higher deposited amount and higher flux. The RMS roughness as obtained by AFM showed that roughness was decreased by membrane fouling. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:2 / 17
页数:16
相关论文
共 49 条
[1]  
Abu Qdais H, 2004, DESALINATION, V164, P105
[2]   Reduction of nanofiltration membrane fouling by UV-initiated graft polymerization technique [J].
Abu Seman, M. N. ;
Khayet, M. ;
Bin Ali, Z. I. ;
Hilal, N. .
JOURNAL OF MEMBRANE SCIENCE, 2010, 355 (1-2) :133-141
[3]   Formation and characterization of polyethersulfone membranes using different concentrations of polyvinylpyrrolidone [J].
Al Malek, S. A. ;
Abu Seman, M. N. ;
Johnson, D. ;
Hilal, N. .
DESALINATION, 2012, 288 :31-39
[4]   Heavy Metals Removal Using Adsorption and Nanofiltration Techniques [J].
Al-Rashdi, Badriya ;
Somerfield, Chris ;
Hilal, Nidal .
SEPARATION AND PURIFICATION REVIEWS, 2011, 40 (03) :209-259
[5]   Rejection and modelling of sulphate and potassium salts by nanofiltration membranes: neural network and Spiegler-Kedem model [J].
Al-Zoubi, H. ;
Hilal, N. ;
Darwish, N. A. ;
Mohammad, A. W. .
DESALINATION, 2007, 206 (1-3) :42-60
[6]  
Badawy S., 2011, AUST J BASIC APPL SC, V5, P236
[7]   Transport coefficients cadmium salt rejection in nanofiltration membrane [J].
Ballet, GT ;
Gzara, L ;
Hafiane, A ;
Dhahbi, M .
DESALINATION, 2004, 167 (1-3) :369-376
[8]   Flux decline in nanoriltration due to adsorption of dissolved organic compounds: Model prediction of time dependency [J].
Braeken, L ;
Van der Bruggen, B ;
Vandecasteele, C .
JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (06) :2957-2962
[9]   Alternative methods for membrane filtration of arsenic from drinking water [J].
Brandhuber, P ;
Amy, G .
DESALINATION, 1998, 117 (1-3) :1-10
[10]   Removal of copper from industrial effluent using a spiral wound module - film theory and hydrodynamic approach [J].
Chaabane, T. ;
Taha, S. ;
Ahmed, M. Taleb ;
Maachi, R. ;
Dorange, G. .
DESALINATION, 2006, 200 (1-3) :403-405