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A sustainable adsorbent for phosphate removal: modifying multi-walled carbon nanotubes with chitosan TEXT SIZE: A A A
Phosphorus, a major culprit for eutrophication of aquatic environments, is dissolved in water primarily in the form of phosphate; hence, it is difficult to remove, and different materials are being investigated, aiming at high removal capabilities. Meanwhile, recovery capability must also be considered, since phosphorus present in wastewater may serve as a potential alternative resource for the mineral phosphorus. Carbon nanotubes are promising for the treatment of phosphate pollution; however, studies about their removal potential are limited. Herein, multi-walled carbon nanotubes were modified with chitosan through simply cross-linking to obtain a novel adsorbent for phosphate removal. Our data show that a maximum adsorption as high as 36.1 +/- 0.3 mg P g(-1) was achieved in 30 min at pH 3 and 293 K. The adsorption capacity of the composite (chitosan/multi-walled carbon nanotubes) could be maintained at 94-98% even after 5 adsorption-desorption cycles. An exothermic process was obtained, according to the Freundlich isotherm model. Based on the reported performance, the composite has a great advantage compared with other novel adsorbents for phosphate removal, indicating that the composite is a highly potential material to treat phosphorus-induced eutrophication of water bodies.

Publication name

 JOURNAL OF MATERIALS SCIENCE, 53 (17):12641-12649; 10.1007/s10853-018-2494-y SEP 2018


 Huang, Yimin; Lee, Xinqing; Grattieri, Matteo; Macazo, Florika C.; Cai, Rong; Minteer, Shelley D

Corresponding author(s) 

 LEE Xinqing
 Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China. 


 Minteer, Shelley D
 Univ Utah, Dept Chem, 315 S 1400 E, Salt Lake City, UT 84112 USA
 Univ Utah, Dept Mat Sci & Engn, 315 S 1400 E, Salt Lake City, UT 84112 USA


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