Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 186, Issue 2-3, Pages 1415-1424Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2010.12.015
Keywords
Microcystis aeruginosa; PAC; Ultrafiltration (UF); Algogenic organic matter; Cyanotoxins
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Funding
- Important Special Program of Science and Technology for the Control and Treatment of Water Pollution in China [2008ZX07422-005]
- State Key Laboratory of Urban Water Resource and Environment (HIT) [2010DX01]
- National Postdoctoral Science Foundation of China [20100471074]
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The aim of this study was to evaluate the effect of powdered activated carbon (PAC) addition on the treatment of algal-rich water by immersed ultrafiltration (UF), in terms of permeate quality and membrane fouling. Experiments were performed with a hollow-fiber polyvinyl chloride ultrafiltration membrane at a laboratory scale, 20-25 degrees C and 10 L/(m(2) h) constant permeate flux. UF could achieve an absolute removal of Microcystis aeruginosa cells, but a poor removal of algogenic organic matter (AOM) released into water, contaminants responsible for severe membrane fouling. The addition of 4 g/L PAC to the immersed UF reactor significantly alleviated the development of trans-membrane pressure and enhanced the removal of dissovled organic carbon (by 10.9 +/- 1.7%), UV254 (by 27.1 +/- 1.7%), and microcystins (expressed as MC-LReq, by 40.8 +/- 4.2%). However, PAC had little effect on the rejection of hydrophilic high molecular weight AOM such as carbohydrates and proteins. It was also identified that PAC reduced the concentrations of carbohydrates and proteins in the reactor due to decreased light intensity, as well as the MC-LReq concentration by PAC adsorption. (C) 2010 Elsevier B.V. All rights reserved.
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