Characteristics and mechanisms of phosphate adsorption onto basic oxygen furnace slag

Xue, Yongjie; Hou, Haobo; Zhu, Shengli

doi:10.1016/j.jhazmat.2008.05.131

Cited by 237 publications

(76 citation statements)

References 14 publications

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“…The peak at 708.3 eV was attributed to ferrous property of iron-deficient sulfide groups ( Fig. 5c) (Xue et al 2009). The peak at 711-713 eV was attributed to ferric hydroxide (Smart.…”

Section: Results Of the Column Sorption And Regeneration Experimentsmentioning

confidence: 98%

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Phosphorus removal from aqueous solutions containing low concentration of phosphate using pyrite calcinate sorbent

Chen

Wang

Xie

et al. 2014

Int. J. Environ. Sci. Technol.

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Natural pyrite was modified by calcination under nitrogen (N 2 ) atmosphere to produce a novel sorbent for removing phosphorus (P) with low concentration from aqueous solutions. The crystallinity, porous texture, magnetic susceptibility and performance in P removal of pyrite calcinates depended on calcination temperatures. The sorbent obtained at calcination temperature of 500-600°C possessed the most efficient P removal. Solution pH in the range of 3.0-9.0 and anions of chloridion (Cl -), nitrate (NO 3 )-and sulfate (SO 4 2-) had ignorable effect on P removal. The batch adsorption experiment shows that the maximum sorption capacities for P of this novel sorbent (q m ) were up to 1.61-5.36 mg P/g at adsorption temperatures of 15-35°C. Dynamic sorption and regeneration experiments were conducted in an adsorption column filled with pyrite calcined at 600°C. The study found that oxygen was an important control factor responsible for P adsorption because the oxidization of Fe 2? to Fe 3? on the surface of the sorbent followed by P being bound to a ferric hydroxide surface film was the crucial processes. The mechanism was confirmed with surface characterization techniques including field emission scanning electron microscope and X-ray photoelectron spectroscopy. This research potentially provides a cheap, abundant sorbent for P removal from the secondary effluent of municipal wastewater treatment plant.

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“…The peak at 708.3 eV was attributed to ferrous property of iron-deficient sulfide groups ( Fig. 5c) (Xue et al 2009). The peak at 711-713 eV was attributed to ferric hydroxide (Smart.…”

Section: Results Of the Column Sorption And Regeneration Experimentsmentioning

confidence: 98%

“…Competition sorption by anions has been found on furnace slag 40 and orange waste gel loaded with zirconium (Xue et al 2009). For iron sulfide, it was also reported that P removal by raw natural pyrite was more strongly affected by SO 4 2-ion than by NO 3 -or Cl -ions .…”

Section: Structure and Property Of Pyrite Calcinatedmentioning

confidence: 95%

Phosphorus removal from aqueous solutions containing low concentration of phosphate using pyrite calcinate sorbent

Chen

Wang

Xie

et al. 2014

Int. J. Environ. Sci. Technol.

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“…RCOCl + H 2 PO 4 − → (-RCO) 2 HPO 4 + 2Cl − + H +(16)The ionized O-H group of "free" hydroxyl groups and bonded O-H bands of carboxylic acids can also be involved in the ligand exchange process, according to the following reactions:2-ROH + H 2 PO 4 − → -R 2 HPO 4 + H 2 O + OH −(18)2-RCOOH + H 2 PO 4 − → -RCO 2 HPO 4 + H 2 O + OH −(19)Furthermore, the presence of the Si-OH, Al-OH and Fe-OH functional groups could contribute to the adsorption of phosphorus as described by[40]:…”

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confidence: 99%

Adsorption characteristics of phosphorus from aqueous solutions onto phosphate mine wastes

Jellali

Wahab

Hassine³

et al. 2011

Chemical Engineering Journal

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“…The AOM concentrations of S3 and S4 decreased to the minimum values at a steel slag dosage of 0.64 g L −1 ; the values were 4.22 and 11.80 mg L −1 , which are equivalent to removal rates of 59.2 and 35.2 %, respectively. Several authors have shown that steel slag has a strong hydrolysis potential to produce Ca 2+ and Mg 2+ as a result of a mixture of dissolution reactions of CaO and MgO (Jha et al 2008;Xue et al 2009). Barca et al (2012) also indicated that Ca 2+ could be released into the solutions based on Eq.…”

Section: Resultsmentioning

confidence: 99%

Flocculation of Microcystis aeruginosa by steel slag and its safety evaluation

Cao

Zhang

et al. 2015

J Appl Phycol

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This study investigated the flocculation of Microcystis aeruginosa by steel slag and evaluated the safety of treated water. The results showed that algal cells at a steel slag dosage of 0.48 g L −1 were effectively removed from two diluted algal solutions when their algogenic organic matter (AOM) contents were 3.54 and 5.81 mg L −1 (referred to as S1 and S2) with algae removal rates of 93.8 and 92.6 %, respectively. Simultaneously, the concentrations of AOM were reduced in S1 and S2 with removal efficiencies of 72.6 and 70.2 %, respectively. Charge neutralisation and bridging were probably the mechanisms that accelerated the flocculation processes. However, AOM had a priority over the algae in the reaction with the steel slag by producing protein complexation, which adversely affected coagulation and increased coagulant demand. Increased K + and AOM after flocculation indicated that cell damage occurred at a retention time of 36 h. However, acute toxicity test demonstrated that the inhibition rate did not significantly increase until the retention time reached 48 h. Overall, steel slag has a great potential as a low-cost alternative to control algal bloom and restore aquatic ecosystems.

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Characteristics and mechanisms of phosphate adsorption onto basic oxygen furnace slag

Cited by 237 publications

References 14 publications

Phosphorus removal from aqueous solutions containing low concentration of phosphate using pyrite calcinate sorbent

Phosphorus removal from aqueous solutions containing low concentration of phosphate using pyrite calcinate sorbent

Adsorption characteristics of phosphorus from aqueous solutions onto phosphate mine wastes

Flocculation of Microcystis aeruginosa by steel slag and its safety evaluation

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