期刊
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
卷 36, 期 2, 页码 489-493出版社
WILEY
DOI: 10.1002/ep.12506
关键词
heavy metals; copper; sodium alginate; capsulation; metal recovery
类别
资金
- National Research Council of Science and Technology [Asia-02-002]
This study introduces the direct application of a sodium alginate solution via a dripping technique to induce effective metal recovery by the formation of crosslinked Cu2+-alginate capsules. The experimental results demonstrated that the performance of Cu2+ removal was highly dependent on the concentration of alginate, dose ratio of alginate to Cu2+ (Al/Cu ratio), and the solution pH condition as these factors immensely affect the mass transfer of Cu2+ into the crosslinking sites in alginate, structural alternations of Cu2+-alginate capsule, and electrostatic relationship among Cu2+ and the functional groups present in alginate. The maximum Cu2+ removal efficiency of 93.1 +/- 1.3% was achieved using 2.0% alginate solution, an Al/Cu ratio of 10: 1, and solution pH of 4.5. Thermal treatment (calcination) for metal recovery indicates that a single-phase monoclinic CuO crystal was the sole product after a simple calcination process. Therefore, it can be concluded that the newly introduced dripping method is a potent alternative technique to provide an abridged and efficient method for heavy metal removal and recovery. (C) 2016 American Institute of Chemical Engineers Environ Prog, 36: 489-493, 2017
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