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Download fileCovalent Triazine Polymer–Fe3O4 Nanocomposite for Strontium Ion Removal from Seawater
journal contribution
posted on 17.04.2017, 00:00 authored by Arunkumar Rengaraj, Yuvaraj Haldorai, Pillaiyar Puthiaraj, Seung Kyu Hwang, Taegong Ryu, Junho Shin, Young-Kyu Han, Wha-Seung Ahn, Yun Suk HuhA microporous covalent triazine polymer
(CTP) is synthesized via
a Friedel–Crafts reaction and used as a solid support to immobilize
magnetite Fe3O4 nanoparticles. Thermogravimetric
analysis shows that approximately 60 wt % Fe3O4 is loaded onto the composite, and transmission electron microscopy
analysis illustrates that the Fe3O4 nanoparticles
are uniformly impregnated into the CTP surface. The CTP–Fe3O4 nanocomposite is an efficient adsorbent for
the removal of strontium ion (Sr2+) from seawater. Response
surface methodology, employed to optimize the removal of Sr2+, confirms that the optimal conditions for this removal are 0.55
mg, pH 7, 40 °C, and 250 min. The experimental results illustrate
that the adsorption process fits well with the Freundlich isotherm,
with a correlation coefficient of 0.976 and a maximum adsorption capacity
of 128 mg g–1. The kinetic study demonstrates that
the adsorption behavior follows pseudo-second-order kinetics. The
adsorbent is easily recovered from seawater using an external magnetic
field, thereby offering facile and economic separation of the adsorbent.
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0.55 mgremovalpseudo-second-order kineticsadsorption capacityCTP surfaceseawaterimmobilize magnetite Fe 3 O 4 nanoparticlesFe 3 O 4 nanoparticles250 minmicroporous covalent triazine polymeradsorption processstrontium ionSrStrontium Ion Removalresponse surface methodologyFreundlich isothermadsorption behaviorcorrelation coefficientadsorbentThermogravimetric analysistransmission electron microscopy analysis