Kinetics of phosphorus removal and struvite formation by the utilization of by-product of magnesium oxide production

Quintana, M.; Sánchez, E.; Colmenarejo, M.F.; Barrera, J.; García, Gema Alejandra Botana; Borja, R.

doi:10.1016/j.cej.2005.05.005

Cited by 77 publications

(47 citation statements)

References 16 publications

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“…Employing comparatively inexpensive magnesium sources was thought to be an effective approach to lower the treatment cost. Many researchers have investigated various low-cost materials containing magnesium, such as by-products generated in the production of magnesium oxide (Chimenos et al 2003;Quintana et al 2005), bittern (Lee et al 2003), and magnesite (MgCO 3 ) mineral (Gunay et al 2008;Chen et al 2009). It was reported that using above-mentioned materials as magnesium sources in struvite precipitation could achieve a high removal of ammonium.…”

Section: Introductionmentioning

confidence: 99%

Removal of ammonium from rare-earth wastewater using natural brucite as a magnesium source of struvite precipitation

Huang

Xiao

Yang

et al. 2011

Water Science and Technology

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This paper presents a study regarding ammonium removal from rare-earth wastewater by struvite precipitation with natural brucite mineral as a source of magnesium. Experimental results indicated that a pH ranging from 8.5 to 9.5 was the optimum for the removal of ammonium using the soluble form of brucite as a magnesium source. Additionally, when solid brucite was used as a magnesium source as well as an alkali reagent, the initial ammonium concentration of 4,535 mg/L decreased to 239-317 mg/L after an reaction time of 12 h in wastewater treated with the S/L (solid brucite/liquid wastewater) ratios ranging from 31.2 to 63.2 g/L. Furthermore, as some non-reacted brucite still remained in the precipitates obtained at the end of reaction, the precipitates were subjected to reuse. The reuse results demonstrated that the reuse of the precipitates obtained with 63.2 g/L was feasible, and almost half of the brucite dose could be saved.Key words 9 9 9 9 ammonium, brucite mineral, phosphorus, rare-earth, struvite precipitation

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Section: Introductionmentioning

confidence: 99%

Removal of ammonium from rare-earth wastewater using natural brucite as a magnesium source of struvite precipitation

Huang

Xiao

Yang

et al. 2011

Water Science and Technology

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“…The phosphorus is removed in the form of struvite (i.e., ammonium magnesium phosphate hydrate, NH 4 MgPO 4 ·6H 2 O) precipitate [7,26,27], which is a slow-release complex fertilizer. To date, many inexpensive Mg sources have been sought as the key material to improve the economic feasibility of struvite precipitation [28][29][30][31][32]. Here, we identified another good candidate for Mg: the iron ore produced at the Shinyemi mine in Gangwon-do, South Korea.…”

Section: Discussionmentioning

confidence: 97%

Production of High-purity Magnetite Nanoparticles from a Low-grade Iron Ore via Solvent Extraction

Suh¹,

May²,

Kil³

et al. 2015

Korean Chemical Engineering Research

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− We produced magnetite nanoparticles (MNPs) and a Mg-rich solution as a nano-adsorbent and a coagulant for water treatment, respectively, using a low-grade iron ore. The ore was leached with aqueous hydrochloric acid and its impurities were removed by solvent extraction of the leachate using tri-n-butyl phosphate as an extractant. The content of Si and Mg, which inhibit the formation of MNPs, was reduced from 10.3 wt% and 15.5 wt% to 28.1 mg/L and < 1.4 mg/L, respectively. Consequently, the Fe content increased from 68.6 wt% to 99.8 wt%. The high-purity Fe 3+ solution recovered was used to prepare 5-15-nm MNPs by coprecipitation. The wastewater produced contained a large amount of Mg 2+ and can be used to precipitate struvite in sewage treatment. This process helps reduce the cost of both sewage and iron-orewastewater treatments, as well as in the economic production of the nano-adsorbent.

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“…Several authors have evaluated the utilisation of alternative magnesium sources such as bittern [127], sea water and brine [128], magnesite [129], magnesite pyrolysate [130], struvite pyrolysate recycling [131] and electrochemical magnesium dosage [132]. [117,133,134]. In this topic, Quintana et al (2008) observed that the origin and the pre-treatment of the by-products have a considerable influence over the reaction time as well as on the quantity and quality of the struvite obtained.…”

Section: Membrane Separationmentioning

confidence: 99%

Nutrient recovery technologies for anaerobic digestion systems: An overview

Romero-Güiza

Mata‐Alvarez

Rivera

et al. 2016

rev.ion

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Kinetics of phosphorus removal and struvite formation by the utilization of by-product of magnesium oxide production

Cited by 77 publications

References 16 publications

Removal of ammonium from rare-earth wastewater using natural brucite as a magnesium source of struvite precipitation

Removal of ammonium from rare-earth wastewater using natural brucite as a magnesium source of struvite precipitation

Production of High-purity Magnetite Nanoparticles from a Low-grade Iron Ore via Solvent Extraction

Nutrient recovery technologies for anaerobic digestion systems: An overview

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