Phosphate removal by anion binding on functionalized nanoporous sorbents

Wilaiwan Chouyyok, Robert J. Wiacek, Kanda Pattamakomsan, Thanapon Sangvanich, Rafal M. Grudzien, Glen E. Fryxell, Wassana Yantasee

Research output: Contribution to journalArticle

115 Citations (Scopus)

Abstract

Phosphate was captured from aqueous solutions by cationic metal?EDA complexes anchored inside mesoporous silica MCM-41 supports (Cu(II)?EDA-SAMMS and Fe(III)?EDA-SAMMS). Fe?EDA-SAMMS was more effective at capturing phosphate than the Cu?EDA-SAMMS and was further studied for matrix effects (e.g., pH, ionic strength, and competing anions) and sorption performance (e.g., capacity and rate). The adsorption of phosphate was highly pH dependent; it increased with increasing pH from 1.0 to 6.5, and decreased above pH 6.5. The adsorption was affected by high ionic strength (0.1 M of NaCl). In the presence of 1000-fold molar excess of chloride and nitrate anions, phosphate removal by Fe?EDA-SAMMS was not affected. Slight, moderate and large impacts were seen with bicarbonate, sulfate, and citrate anions, respectively. The phosphate adsorption data on Fe?EDA-SAMMS agreed well with the Langmuir model with the estimated maximum capacity of 43.3 mg/g. The material displayed rapid sorption rate (99% of phosphate removal within 1 min) and lowering the phosphate content to ?10 μg/L of phosphorus, which is lower than the EPA's established freshwater contaminant level for phosphorus (20 μg/L).

Original languageEnglish (US)
Pages (from-to)3073-3078
Number of pages6
JournalEnvironmental Science and Technology
Volume44
Issue number8
DOIs
StatePublished - Apr 15 2010

Fingerprint

Sorbents
Anions
anion
Phosphates
phosphate
adsorption
sorption
Ionic strength
Adsorption
phosphorus
Phosphorus
Sorption
pH effects
bicarbonate
aqueous solution
silica
Bicarbonates
chloride
phosphate removal
Citric Acid

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

Cite this

Chouyyok, W., Wiacek, R. J., Pattamakomsan, K., Sangvanich, T., Grudzien, R. M., Fryxell, G. E., & Yantasee, W. (2010). Phosphate removal by anion binding on functionalized nanoporous sorbents. Environmental Science and Technology, 44(8), 3073-3078. https://doi.org/10.1021/es100787m

Phosphate removal by anion binding on functionalized nanoporous sorbents. / Chouyyok, Wilaiwan; Wiacek, Robert J.; Pattamakomsan, Kanda; Sangvanich, Thanapon; Grudzien, Rafal M.; Fryxell, Glen E.; Yantasee, Wassana.

In: Environmental Science and Technology, Vol. 44, No. 8, 15.04.2010, p. 3073-3078.

Research output: Contribution to journalArticle

Chouyyok, W, Wiacek, RJ, Pattamakomsan, K, Sangvanich, T, Grudzien, RM, Fryxell, GE & Yantasee, W 2010, 'Phosphate removal by anion binding on functionalized nanoporous sorbents', Environmental Science and Technology, vol. 44, no. 8, pp. 3073-3078. https://doi.org/10.1021/es100787m
Chouyyok W, Wiacek RJ, Pattamakomsan K, Sangvanich T, Grudzien RM, Fryxell GE et al. Phosphate removal by anion binding on functionalized nanoporous sorbents. Environmental Science and Technology. 2010 Apr 15;44(8):3073-3078. https://doi.org/10.1021/es100787m
Chouyyok, Wilaiwan ; Wiacek, Robert J. ; Pattamakomsan, Kanda ; Sangvanich, Thanapon ; Grudzien, Rafal M. ; Fryxell, Glen E. ; Yantasee, Wassana. / Phosphate removal by anion binding on functionalized nanoporous sorbents. In: Environmental Science and Technology. 2010 ; Vol. 44, No. 8. pp. 3073-3078.
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