Highly efficient phosphate sequestration in aqueous solutions using nanomagnesium hydroxide modified polystyrene materials

Qingrui Zhang, Zhaoxiang Zhang, Jie Teng, Haiming Huang, Qiuming Peng, Tifeng Jiao, Li Hou, Bingbing Li

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

Phosphate removal is important for the control of eutrophication, and adsorption may serve as a powerful supplement to biological phosphate sequestration. Here, we develop a new composite adsorbent (denoted as HMO-PN) by encapsulating active nano-Mg(OH)2 onto macroporous polystyrene beads modified with fixed quaternary ammonium groups [CH2N+(CH2)3Cl]. The N+-tailored groups can accelerate the diffusion of target phosphate through electrostatic attractions. The performance of the as-prepared HMO-PN was found to depend on the pH value of an aqueous medium. HMO-PN also exhibits high sorption selectivity toward the target phosphate. Kinetic equilibrium of phosphate adsorption can be achieved within 100 min, and the calculated maximum adsorption capacity is approximately 1.47 mmol/g (45.6 mg/g). Column experiments further show that the effluent concentration of phosphate can be reduced to below 0.5 mg/L (500 BV), suggesting highly efficient phosphate sequestration. Moreover, the exhausted HMO-PN can be readily regenerated using an alkaline brine solution.

Original languageEnglish
Pages (from-to)2940-2949
Number of pages10
JournalIndustrial and Engineering Chemistry Research
Volume54
Issue number11
DOIs
StatePublished - Mar 25 2015

Fingerprint

Dive into the research topics of 'Highly efficient phosphate sequestration in aqueous solutions using nanomagnesium hydroxide modified polystyrene materials'. Together they form a unique fingerprint.

Cite this