Effects of redox potential and pH changes on phosphorus retention by melter slag filters treating wastewater.

@article{Pratt2007EffectsOR,
  title={Effects of redox potential and pH changes on phosphorus retention by melter slag filters treating wastewater.},
  author={Chris Pratt and A. Shilton and Steven H Pratt and Richard G Haverkamp and Ibrahim Elmetri},
  journal={Environmental science & technology},
  year={2007},
  volume={41 18},
  pages={6585-90}
}
The release of phosphorus (P) and iron (Fe) from a melter slag filter in solutions of varying Eh and pH was examined. The filter had been removing P from waste stabilization pond effluent for several years. The study revealed that the highest P (95% of total P) and Fe (25% of total Fe) release from the slag occurred in the solution with the lowest Eh (-400 mV, relative to the standard hydrogen electrode, SHE) and lowest pH (4.9). Solutions with high pH (9.1) also proved favorable for P release… CONTINUE READING