4.4 Article

Adsorptive separation of metallic pollutants onto waste seaweeds, Porphyra yezoensis and Ulva japonica

Journal

SEPARATION SCIENCE AND TECHNOLOGY
Volume 42, Issue 9, Pages 2003-2018

Publisher

TAYLOR & FRANCIS INC
DOI: 10.1080/15363830701313461

Keywords

waste seaweed; ion exchange; adsorption; heavy metals

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From two kinds of seaweeds, Porphyra yezoensis and Ulva japonica, adsorption gels for heavy metal. ions were prepared by enhancing their adsorptive properties and diminishing the aqueous solubility. An environmental benign crosslinking using calcium have shown maximum adsorption capacity of 0.67 mol/kg dry gel for lead(II), which is slightly lower as compared to the adsorbents crosslinked with synthetic crosslinking agent (0.76 mol/kg). Fixed bed column studies for a binary mixture containing lead(II) and zinc(II) revealed that lead(II) can be mutually separated from zinc(II) with a concentration factor of 45.

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