TY - JOUR
T1 - Influence of Fe(III) on the filtration characteristics of the calcium alginate gel layer
AU - Chen, Xudi
AU - Liu, Wenjun
AU - Wang, Xiaomao
AU - Yang, Hongwei
AU - Xie, Yuefeng
N1 - Funding Information:
Supported by the National Natural Science Foundation of China (No.51278268) and the National Water Pollution Control and Treatment Science and Technology Major Project (No. 2012ZX07404002).
Publisher Copyright:
© 2015, Science Press. All right reserved.
PY - 2015/11/6
Y1 - 2015/11/6
N2 - In order to understand the influence of Fe(III) on the filtration characteristics of polysaccharide fouling layer on membranes for drinking water treatment, this study selected alginate as a model polysaccharide, analyzed the filterability of the fouling layers formed from calcium alginate w/wo Fe(III), and quantitatively described the characteristics of the gel layers by using the permeability function and compressibility function. The results showed that calcium ions could aid alginate molecules to form a compact gel layer, which had high filtration resistance. Ferric ions and ferric (hydr)oxides (FeOx(OH)3-2x) particles coexisted in the alginate solution after the addition of ferric chloride, as ferric ions could quickly hydrolyze in water. A small amount of Fe(III) did not have significant effect on the filtration of the calcium alginate gel layer while increased amount of Fe(III) could improve the filterability because the gel layer structure had been changed by the ferric (hydr)oxides particles of higher concentration and/or size.
AB - In order to understand the influence of Fe(III) on the filtration characteristics of polysaccharide fouling layer on membranes for drinking water treatment, this study selected alginate as a model polysaccharide, analyzed the filterability of the fouling layers formed from calcium alginate w/wo Fe(III), and quantitatively described the characteristics of the gel layers by using the permeability function and compressibility function. The results showed that calcium ions could aid alginate molecules to form a compact gel layer, which had high filtration resistance. Ferric ions and ferric (hydr)oxides (FeOx(OH)3-2x) particles coexisted in the alginate solution after the addition of ferric chloride, as ferric ions could quickly hydrolyze in water. A small amount of Fe(III) did not have significant effect on the filtration of the calcium alginate gel layer while increased amount of Fe(III) could improve the filterability because the gel layer structure had been changed by the ferric (hydr)oxides particles of higher concentration and/or size.
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U2 - 10.13671/j.hjkxxb.2014.1037
DO - 10.13671/j.hjkxxb.2014.1037
M3 - Article
AN - SCOPUS:85014459813
VL - 35
SP - 3522
EP - 3528
JO - Huanjing Kexue Xuebao / Acta Scientiae Circumstantiae
JF - Huanjing Kexue Xuebao / Acta Scientiae Circumstantiae
SN - 0253-2468
IS - 11
ER -