3 years ago

Fabrication and Characterization of Magnetic Hydroxyapatite Entrapped Agarose Composite Beads with High Adsorption Capacity for Heavy Metal Removal

Fabrication and Characterization of Magnetic Hydroxyapatite Entrapped Agarose Composite Beads with High Adsorption Capacity for Heavy Metal Removal
Shunmin Dan, Kaifeng Du, Qi Zhang
Magnetic hydroxyapatite entrapped agarose composite beads (M-HAP/Agar composite beads) have been successfully synthesized by emulsification of magnetic HAP nanoparticles with agarose suspension. In the process, the magnetic HAP nanoparticles served as the main resource for high adsorption performance, which were constructed by surface modification of Fe3O4 with N-(phosphonomethyl)iminodiacetic acid (PM-IDA) and followed by coating with HAP. This strategy integrates the distinct advantages of large-size beads and magnetic response for easy recovery as well as nanoparticles for high adsorption capacity. The resulting M-HAP/Agar composite beads display large specific surface area (90 m2 g–1) and uniform spherical shape (150 μm). These magnetic hydroxyapatite nanoparticles in beads can provide more adsorption sites due to their suitable porous structure. As a result, the adsorbent exhibits excellent performance in adsorption of Pb2+, Co2+, and Cu2+, showing maximum binding capacities as high as 842.6, 105.1, and 71.6 mg g–1, respectively. All these results suggest that these magnetic nanoparticles entrapped in beads have a positive effect on improving the adsorption capacity. Moreover, the beads possess superparamagnetism and large size, allowing them to be easily recovered from solution. Therefore, this work provides a promising approach for the design and synthesis of multifunctional hydroxyapatite composite beads for highly efficient removal of heavy metals in the field of wastewater treatment.

Publisher URL: http://dx.doi.org/10.1021/acs.iecr.7b01635

DOI: 10.1021/acs.iecr.7b01635

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.