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Phosphorus Retention and Regeneration of EAF Steel Slag and a Synthetic Iron Oxyhydroxide

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2017, Master of Science, Ohio State University, Environmental Science.
Artificial drainage is widely used in U.S. Midwest to remove excessive water from soil and ensure crop production. However, the alteration of hydraulic and nutrient cycle caused by the artificial drainage may lead to increased loading of phosphorus in downstream water bodies. An option to remove phosphorus in drainage water is to apply a filter structure filled with phosphorus retention materials. In this research, two phosphorus retention materials, EAF steel slag, and a synthetic iron oxyhydroxide (SIOH), were investigated through batch and flow-through experiments for their phosphorus retention performance, mechanism and regeneration techniques. For the series of experiments from this research, EAF steel slag retains phosphorus through precipitation while SIOH retains phosphorus through adsorption. Both materials can attain high phosphorus retention ratio at low phosphorus concentrations which are common in drainage water but EAF steel slag retain much less phosphorus at higher concentrations than SIOH. The phosphorus retention rate of EAF steel slag is also smaller than SIOH and the efficiency of EAF steel slag is greatly affected by HRT. The results of the experiments also show that HCl can dissolve indigenous material of EAF steel slag and may not be suitable for the regeneration of EAF steel slag. NaOH was shown to desorb phosphorus retained by SIOH, but the regeneration of phosphate retention capacity remains unclear. Further research is still required for the development of regeneration techniques for the two materials.
Larry Brown (Advisor)
Barry Allred (Committee Member)
Norman Fausey (Committee Member)
91 p.

Recommended Citations

Citations

  • Zeng, F. (2017). Phosphorus Retention and Regeneration of EAF Steel Slag and a Synthetic Iron Oxyhydroxide [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1512067344406673

    APA Style (7th edition)

  • Zeng, Fengzhencheng. Phosphorus Retention and Regeneration of EAF Steel Slag and a Synthetic Iron Oxyhydroxide. 2017. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1512067344406673.

    MLA Style (8th edition)

  • Zeng, Fengzhencheng. "Phosphorus Retention and Regeneration of EAF Steel Slag and a Synthetic Iron Oxyhydroxide." Master's thesis, Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1512067344406673

    Chicago Manual of Style (17th edition)