Capture of phosphates in surface water by TiO2 nanoparticles under UV irradiation--颗粒学报PARTICUOLOGY

Xie, H., Zheng, Q., Wang, S., Ma, C., Gao, G., Bing, N., & Sun, Z. (2014). Capture of phosphates in surface water by TiO2 nanoparticles under UV irradiation. Particuology, 14, 98–102. https://doi.org/10.1016/j.partic.2013.09.003

Capture of phosphates in surface water by TiO₂ nanoparticles under UV irradiation

Hongyong Xie ^a *, Qi Zheng ^b, Shanzhu Wang ^b, Changwen Ma ^a, Guilan Gao ^a, Naici Bing ^a, Zhiguo Sun ^a

a School of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, Shanghai 201209, China
b Shanghai Pudong Hydrology and Water Resource Administration, Shanghai 200129, China

10.1016/j.partic.2013.09.003

Volume 14, June 2014, Pages 98-102

Received 1 January 2013, Revised 9 September 2013, Accepted 27 September 2013, Available online 15 November 2013.

E-mail: hyxie@sspu.edu.cn; hyxie@163.com

Highlights

• Capture of phosphates from surface water by TiO₂ nanoparticles under UV irradiation was studied.

• At 0.1 g/L loading of TiO₂ and 36 mW/cm² UV intensity, 95% capture was achieved within 10 min.

• pH values in the range of 2–10.5 have little effect on the capture of total phosphorus.

Abstract

The capture of orthophosphates and total phosphorus from the Pudong Canal river in the Pudong District of Shanghai by TiO₂ nanoparticles is studied using a rotating photoreactor and the nano-TiO₂ photocatalyst Degussa P25. The effects of UV irradiation intensity in a range of 20–74 mW/cm², the loading of the TiO₂ nanoparticles in a range of 0.05–0.1 g/L, irradiation time up to 4 h, and pH values in a range of 2–10.5 on the capture efficiency are investigated. The results show that the capture of orthophosphates and total P are significantly enhanced by UV irradiation; at a loading of 0.1 g/L and an irradiation intensity above 36 mW/cm², orthophosphates and total phosphorus are rapidly captured by TiO₂ nanoparticles, causing an observed reduction from 0.4 mg/L down to 0.02 mg/L. pH values in a range of 2–10.5 have little effect on the capture efficiency of orthophosphates and total phosphorus.

Graphical abstract

Keywords

Orthophosphates; Total phosphorus; Surface water; TiO₂ nanoparticles; UV irradiation

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