Heavy metal ion adsorbent and preparation method thereof
A technology of heavy metal ions and adsorbents, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of the ability to remove metal ions, affect the chelation of metal ions, etc., and achieve reuse rate High, easy to remove, good adsorption effect
Inactive Publication Date: 2015-04-22
BEIJING NORMAL UNIVERSITY +1
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The invention provides a heavy metal ion adsorbent which contains nucleuses, polyamidoamine dendrimers grafted to the nucleuses through a silane compound and polyanions absorbed to the polyamidoamine dendrimers. The nucleuses are silicon dioxide coated ferroferric oxide. In the heavy metal ion adsorbent, the polyamidoamine dendrimers are absorbed with a layer of polyanions through electrostatic attraction, polyanions and especially the configuration of DNA is not changed, it is ensured that the outermost-layer polyanions can produce strong chelation with heavy metal ions during absorption, and accordingly the heavy metal ions in a water body are effectively removed. The heavy metal ion adsorbent is small in particle size and large in specific surface area. Furthermore, the polyamidoamine dendrimers with spherical structures can be further grafted to the polyamidoamine dendrimers and then the polyanions are absorbed to the polyamidoamine dendrimers, so that the heavy metal ion adsorbent is good in absorption effect and high in repeating utilization rate. In addition, the nucleuses in the heavy metal ion adsorbent are magnetic, so that separation is facilitated.
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