Scaled-up development of magnetically recyclable Fe3O4/La(OH)3 composite for river water phosphate removal: From bench-scale to pilot-scale study.

The Science of the Total Environment
Saeed AhmedIrene M C Lo

Abstract

The use of magnetic lanthanum-based materials for phosphate removal from river water has gained increasing attention. However, challenges to produce and use lanthanum-based materials in large-scale or pilot-scale studies remain. In this work, a kilogram-scale Fe3O4/La(OH)3 magnetically recyclable composite for removing phosphate from river water was developed through a low-temperature precipitation route. The composite was used to remove phosphate from river water at both bench- and pilot-scales. Based on the bench-scale tests, the developed Fe3O4/La(OH)3 composite was found to have excellent magnetic particle separation efficiency (>98%) and a sorption capacity of 11.77 mg/g for phosphate. A 1.0 g/L dosage of the composite in the river water sample was able to selectively reduce the phosphate level from 0.089 to 0.005 mg/L in 60 min over five consecutive adsorption cycles. At the pilot-scale, the Fe3O4/La(OH)3 composite only achieved 36.0% phosphate removal efficiency, which is considerably different from the bench-scale results over an operational time of five months and a total treatment volume of 300 m3. This significantly reduced removal efficiency is mainly attributable to turbidity, suspended solids, and organic matter i...Continue Reading

References

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Feb 24, 2010·Environmental Management·C LeB Yin
Oct 12, 2010·Journal of Hazardous Materials·Paul DelaneyMichael A Morris
Mar 22, 2013·Water Research·Samuel C N Tang, Irene M C Lo
Jul 18, 2018·Journal of Colloid and Interface Science·Haoyang FuHongping He
Mar 9, 2019·Recent Patents on Nanotechnology·Saeed AhmedYongjun Feng
Nov 16, 2019·Chemosphere·Geert J BehetsPatrick C D'Haese
Aug 14, 2020·Environmental Science & Technology·Kaushik VenkiteshwaranBrooke K Mayer
Sep 28, 2020·Environmental Research·Facundo BarraquéJose L Marco-Brown

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