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Number of results

Journal

2015 | 13 | 1 |

Article title

Struvite recovery from solution containing phosphate(V) and sulphate(VI) ions

Content

Title variants

Languages of publication

EN

Abstracts

EN
The research results concerning the application of magnesium and ammonium ions for continuous removal of phosphate(V) ions from solution containing 1.0 or 0.20 mass% of PO43– and from 0.10 to 0.50 mass% of SO42– are presented. A continuous struvite MgNH4PO4 × 6H2O reaction crystallization process was carried out both under stoichiometric conditions and using 20% excess of magnesium ions. The research was conducted in a DT MSMPR type crystallizer with internal circulation of suspension driven by a propeller stirrer, in constant temperature 298 K. The pH varied from 9 to 11 and mean residence time of suspension in a crystallizer τ varied from 900 to 3600 s. It was concluded, that sulphate(VI) ions influenced product quality disadvantageously. Depending on process parameter combinations struvite crystals of mean size from ca. 18 to ca. 44 μm and of moderate homogeneity: CV 7–95% were produced. Presence of sulphate(VI) ions favored crystallization of struvite as prismatic crystals, but tubular forms were also identified. The best shaped struvite crystals were produced at relatively low concentration of sulphate(VI) ions, pH 9 and for mean residence time of suspension in a crystallizer elongated up to 3600 s.

Publisher

Journal

Year

Volume

13

Issue

1

Physical description

Dates

accepted
15 - 5 - 2015
received
29 - 1 - 2015
online
6 - 7 - 2015

Contributors

author
  • Faculty of Chemistry,
    Wroclaw University of Technology, 50–370 Wroclaw, Poland
author
  • Faculty of Chemistry,
    Wroclaw University of Technology, 50–370 Wroclaw, Poland
  • Department of Chemical Engineering and Process Design, Silesian University of Technology, 44–101 Gliwice, Poland
  • Faculty of Chemistry,
    Wroclaw University of Technology, 50–370 Wroclaw, Poland

References

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  • [3] Le Corre K.S., Valsami-Jones E., Hobbs P., Parsons S.A., Phosphorus recovery from wastewater by struvite crystallization: a review, Crit. Rev. Environ. Sci. Technol., 2009, 39, 433-477.[WoS][Crossref]
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  • [5] Le Corre K.S., Valsami-Jones E., Hobbs P., Parsons S.A., Impact of reactor operation on success of struvite precipitation from synthetic liquors, Environ. Technol., 2007, 28, 1245-1256.[WoS][Crossref]
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  • [7] Hutnik N., Wierzbowska B., Matynia A., Effect of inorganic impurities on quality of struvite in continuous reaction crystallization at the excess of magnesium ions, Przem. Chem., 2012, 91, 762-766 (in Polish).
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  • [9] Hutnik N., Piotrowski K., Wierzbowska B., Matynia A., Continuous reaction crystallization of struvite from phosphate(V) solutions containing calcium ions, Cryst. Res. Technol., 2011, 46, 443-449.[WoS][Crossref]
  • [10] Hutnik N., Kozik A., Mazienczuk A., Piotrowski K.,Wierzbowska B., Matynia A., Phosphates(V) recovery from phosphorus mineral fertilizers industry wastewater by continuous struvite reaction crystallization process, Wat. Res., 2013, 47 , 3635-3643.[Crossref]
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Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_1515_chem-2015-0120
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