Investigation of Phosphate Removal Capability of Blast Furnace Slag in Wastewater Treatment

Yasipourtehrani, Sara; Strezov, Vladimir; Evans, Tim

doi:10.1038/s41598-019-43896-y

Cited by 34 publications

(14 citation statements)

References 34 publications

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“…This adsorbent is particularly promising for wastewater and water since it exerts activity even when the phosphate concentration is low and has tolerance to a wide range of pH values [72]. However, Yasipourtehrani et al [73] reported that samples of blast-furnace slag involved in the process release various concentrations of the toxic metals Al, Cd, Co, and Hg into solutions, a factor that could severely limit the material's application in treatment. Biochar, which is obtained through biomass pyrolysis, is characterised by a loose porous structure that encourages its use as a soil improver.…”

Section: Synthesized and Waste Materials And Their Modificationsmentioning

confidence: 99%

Reactive Materials in the Removal of Phosphorus Compounds from Wastewater—A Review

et al. 2020

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Modern technologies designed to treat wastewater containing phosphorus compounds are based on the processes of adsorption and precipitation. In addition, more environmentally friendly and cheaper materials are being sought to ensure greater conformity with overarching assumptions of green chemistry and sustainable development. Against that background, this paper offers a review and analysis of available information on the considered reactive materials that have the capacity to remove phosphorus from wastewater. These materials are categorised as natural (with a sub-division in line with the dominant sorption groups of Al/Fe or Ca/Mg), waste, or man-made. Notably, most studies on sorbents have been carried out in laboratory systems via experimentation under static conditions. Among the natural materials, opoka has the highest sorption capacity of 181.20 g P/kg, while red mud (in the waste material category) is most efficient at binding phosphorus with a level of 345.02 g P/kg. Finally, among the group of commercial materials, Rockfos® has the highest sorption capacity of 256.40 g P/kg. In addition, this paper recognises the effect of composition, pH, and physical properties on a reactive material’s capacity to absorb phosphorus, as well as the possibility for further potential use in the production of fertilisers.

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Section: Synthesized and Waste Materials And Their Modificationsmentioning

confidence: 99%

Reactive Materials in the Removal of Phosphorus Compounds from Wastewater—A Review

et al. 2020

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“…These materials include low-cost recycled materials such as fruit extracts [112], coconut shells [113], scrap tires [114], fly ash [115][116][117], sawdust [118], peat moss [119], rice husk [120], red mud [121,122], minerals [123], blast furnace slag [124] and sludge [125], black liquor lignin [126], waste slurry [127], chitin [128], chitosan [129], and alginate [130]. The synthetic materials used as sorbents include activated carbon [131], zeolites [132], metal oxides/hydroxides [133], metal sulfides [134], and metal selenides [135].…”

Section: Sorptive Removal Of Contaminantsmentioning

confidence: 99%

Covalent and Non-covalent Functionalized Nanomaterials for Environmental Restoration

et al. 2022

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Nanotechnology has emerged as an extraordinary and rapidly developing discipline of science. It has remolded the fate of the whole world by providing diverse horizons in different fields. Nanomaterials are appealing because of their incredibly small size and large surface area. Apart from the naturally occurring nanomaterials, synthetic nanomaterials are being prepared on large scales with different sizes and properties. Such nanomaterials are being utilized as an innovative and green approach in multiple fields. To expand the applications and enhance the properties of the nanomaterials, their functionalization and engineering are being performed on a massive scale. The functionalization helps to add to the existing useful properties of the nanomaterials, hence broadening the scope of their utilization. A large class of covalent and non-covalent functionalized nanomaterials (FNMs) including carbons, metal oxides, quantum dots, and composites of these materials with other organic or inorganic materials are being synthesized and used for environmental remediation applications including wastewater treatment. This review summarizes recent advances in the synthesis, reporting techniques, and applications of FNMs in adsorptive and photocatalytic removal of pollutants from wastewater. Future prospects are also examined, along with suggestions for attaining massive benefits in the areas of FNMs.

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“…In Figure 10b, the FTIR spectra of unreacted GGBS exhibit a band between wavenumbers 876 cm −1 and 963 cm −1 , representing stretching vibrations of the AlO 4 −1 group along with the related antisymmetric stretching vibrations of (Al)-O, respectively. The weak band at wavenumber 714 cm −1 is ascribed to Si-O-Si(Al) bridges, linked or related to the SiO 4 tetrahedral [75,76]. The transmittance wavenumbers (876 to 963, 714 cm −1 ) observed in the unreacted slag were strongly reduced in the reacted GGBS, which may indicate the role of Al and Si towards effective contaminant removal by slag [76].…”

Section: Characterisation and Ftir Analysismentioning

confidence: 99%

“…The weak band at wavenumber 714 cm −1 is ascribed to Si-O-Si(Al) bridges, linked or related to the SiO 4 tetrahedral [75,76]. The transmittance wavenumbers (876 to 963, 714 cm −1 ) observed in the unreacted slag were strongly reduced in the reacted GGBS, which may indicate the role of Al and Si towards effective contaminant removal by slag [76]. In a study of chromite and slag interactions by Lee and Nassaralla [77], it was reported that a replacement of Al 2 O 3 in slag by SiO 2 , reduced Cr(VI) formation.…”

Section: Characterisation and Ftir Analysismentioning

confidence: 99%

Interactive Relationship between Cementitious Materials and Acid Mine Drainage: Their Effects on Chromium Cr(VI) Removal

Shabalala

Basitere

2020

Minerals

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Elevated hexavalent chromium (Cr(VI)) levels in pervious concrete may undermine its successful application in water treatment. Portland cement CEM I 52.5R (CEM I), coal fly ash (FA), natural zeolite and ground granulated blast-furnace slag (GGBS) were evaluated as adsorbents for removal of Cr(VI) from acid mine drainage (AMD). Adsorption experiments were conducted at dosages of 6, 10, 30 and 60 g of adsorbent in 200 mL of AMD, while the mixing contact time was varied from 15 to 300 min. It was found that the use of CEM1 and FA adsorbents strongly increased the Cr(VI) concentration in AMD. Conversely, zeolite and GGBS removed up to 76% and 100% of Cr(VI) from AMD, respectively, upon their use at dosages of at least 10 g of the adsorbent. Freundlich isotherm was found better fitted with a high correlation coefficient (R2 = 0.998 for zeolite and 0.973 for GGBS) than to the Langmuir model (R2 = 0.965 for zeolite and 0.955 for GGBS). Adsorption and ion exchange seem to be active mechanisms for the Cr(VI) removal. These results suggest that zeolite and GGBS can be considered as partial cement replacement materials for effective reduction or removal of Cr(VI) from the treated water.

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Investigation of Phosphate Removal Capability of Blast Furnace Slag in Wastewater Treatment

Cited by 34 publications

References 34 publications

Reactive Materials in the Removal of Phosphorus Compounds from Wastewater—A Review

Reactive Materials in the Removal of Phosphorus Compounds from Wastewater—A Review

Covalent and Non-covalent Functionalized Nanomaterials for Environmental Restoration

Interactive Relationship between Cementitious Materials and Acid Mine Drainage: Their Effects on Chromium Cr(VI) Removal

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