✦ LIBER ✦

Utilization of some starch derivatives in heavy metal ions removal

✍ Scribed by M. I. Khalil; S. Farag

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 181 KB
Volume: 69
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(19980705)69:1<45::aid-app6>3.0.co;2-m

No coin nor oath required. For personal study only.

✦ Synopsis

Three types of starch derivatives containing amide groups were used in removal of heavy metal ions from their solutions. These starch derivatives were poly-(acrylamide) -starch graft copolymer, carbamoylethylated starch, and starch carbamate. The different factors affecting metal ion adsorption on these substrates, such as pH, metal ion concentration, type of starch derivatives, treatment time, and temperature, were studied. Results obtained indicate that the poly(acrylamide) -starch graft copolymer was a selective adsorbant for Hg 2/ at pH 0.5-1. The adsorption values of different metal ions on these starch derivatives follow the order of Hg 2/ ú Cu 2/ ú Zn 2/ ú Ni 2/ ú Co 2/ ú Cd 2/ ú Pb 2/ . The adsorption values depend upon pH, type of starch derivative, treatment duration, and temperature. The adsorption efficiency percentage of metal ions on the three substrates follows the order of carbamoylethylated starch ú poly(acrylamide) 0 starch graft copolymer ú starch carbamate.

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