Polyamide nanofiltration membranes modified with Zn–Al layered double hydroxides for natural organic matter removal

2016 ◽  
Vol 132 ◽  
pp. 84-92 ◽  
Author(s):  
Yu Zhao ◽  
Nana Li ◽  
Shengji Xia
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Layered Double Hydroxides ◽  
Nanofiltration Membranes ◽  
Organic Matter Removal ◽  
Double Hydroxides

Natural organic matter removal and flux decline with charged ultrafiltration and nanofiltration membranes

2011 ◽  
Vol 376 (1-2) ◽  
pp. 179-187 ◽  
Author(s):  
Hongchen Song ◽  
Jiahui Shao ◽  
Yiliang He ◽  
Juan Hou ◽  
Wenpo Chao
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Nanofiltration Membranes ◽  
Organic Matter Removal ◽  
Flux Decline

Removal of guar and humus from water by layered double hydroxides

2009 ◽  
Vol 59 (8) ◽  
pp. 1641-1647 ◽  
Author(s):  
Song Jin ◽  
Kangping Cui ◽  
Paul H. Fallgren ◽  
Michael A. Urynowicz ◽  
Jiazhong Jian
Keyword(s):  
Organic Matter ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
Layered Double Hydroxides ◽  
Water Adsorption ◽  
Guar Gum ◽  
Order Model ◽  
Pseudo Second Order ◽  
Double Hydroxides ◽  
Langmuir And Freundlich Models

Natural organic matter such as guar and humus are recalcitrant to conventional pretreatment technologies and can potentially foul processes such as membranes during water treatment. An innovative method of using synthetic layered double hydroxides (LDH) was investigated for removing common natural organic matter in the form of guar gum (GG) and humic acid (HA) from water. Adsorption isotherms were evaluated with Langmuir and Freundlich models. Results show the affinity of GG and HA to LDH to be 11.31 and 9.33 mg g−1 LDH, respectively. Kinetic isotherms indicate that the sorbing rates of LDH to GG and HA increase with initial GG and HA concentrations, fitting a pseudo-second order model. This study demonstrate that LDH may be an effective material in removing GG and HA from waters and offer an alternative to conventional pretreatment technologies for the mitigation fouling of membrane and other systems in water treatment.

Coagulation assessment and optimisation with a photometric dispersion analyser and organic characterisation for natural organic matter removal performance

2011 ◽  
Vol 168 (2) ◽  
pp. 629-634 ◽  
Author(s):  
Christian Staaks ◽  
Rolando Fabris ◽  
Todd Lowe ◽  
Christopher W.K. Chow ◽  
John A. van Leeuwen ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Organic Matter Removal ◽  
Photometric Dispersion
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