期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 178, 期 1-3, 页码 988-993出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2010.02.035
关键词
Polymer assisted ultrafiltration; Poly(vinyl alcohol); Poly(acrylic acid); Cobalt; Radioactive wastes; Sulfonation
资金
- EU [MTKD-CT-2004-509226]
- National Centre for Research and Development (NCBiR) [R05 0058 06/2009]
In this study, three sulfonated water-soluble polymers based on poly(vinyl alcohol) of different molecular weights (10,000, 50,000 and 100,000 Da) were prepared and tested against commercially available poly(acrylic acid) for the removal of cobalt using polymer assisted ultrafiltration. High rejection rates were obtained between pH 3 and 6 with sulfonated poly(vinyl alcohol) (PVA 10,000 and 50,000 Da) whereas poly(acrylic acid) (PM) of similar molecular weights performed rather poorly in this pH range. Sulfonation improved significantly sorption capability of PVA. Sulfonated PVA 10,000 was the best complexing agent with rejection rate above 95% between pH 3 and 6. For unmodified PVA the rejection rate was only 30-45% at pH 6 and there was no rejection at pH 3 at all. PAA rejection rate was above 90% at pH 6 and only about 10% at pH 3. Large scale experiment in cross-flow, continuous apparatus conducted by using PVA-SO3H 10,000 Da to remove Co-60 radioisotope from water solutions showed excellent results demonstrating the potential of this polymer to purify acidic radioactive wastes containing cobalt radioisotopes. (C) 2010 Elsevier B.V. All rights reserved.
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