Restoring phosphorus from water to soil: Using calcined eggshells for P adsorption and subsequent application of the adsorbent as a P fertilizer

Lee, Jae-In; Kim, Jeong-Man; Yoo, Soo-Cheul; Jho, Eun Hea; Lee, Changgu; Park, Seong‐Jik

doi:10.1016/j.chemosphere.2021.132267

Cited by 48 publications

(22 citation statements)

References 81 publications

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“…Eutrophication is a problem that affects around 30–40% of the world’s water resources and poses a major threat to aquatic ecosystems by lowering dissolved oxygen levels and deteriorating water quality, resulting in the death of many fish and other organisms. , One of the main causes is the large amount of phosphate that enters water bodies as a result of its use as fertilizers and detergents. − Hence, it is indispensable to remove the excess phosphate before the wastewater is discharged.…”

Section: Introductionmentioning

confidence: 99%

Adsorption and Removal of Phosphate from Wastewater Using Lignin-Based Adsorbent Modified with Lanthanide: Characterization, Performance, and Mechanisms

Zhang

Mai

Xian

et al. 2022

Ind. Eng. Chem. Res.

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Water eutrophication due to the discharge of wastewater containing phosphate has aroused considerable concern around the world, and adsorption has been identified as one of the viable solutions to solve the problem. It is crucial to develop an eco-friendly and cost-effective adsorbent for preventing eutrophication of water bodies. In this study, we developed a simple coprecipitation approach to prepare a lanthanum-based modified calcium lignosulfonate (La-CL) for treating phosphate wastewater. La-CL exhibited excellent adsorption ability for phosphate due to its high loading of lanthanum (59.29%) and large specific surface area (175.3 m2 g–1). In a wide range of pH values (2–11), the adsorption capacity of phosphate onto La-CL remained stable, and the removal rate was above 90%. The maximum adsorption capacity could reach 107 mg g–1 for phosphate at optimum pH = 7, and the adsorption reached equilibrium within 240 min. After seven consecutive regeneration adsorption experiments, La-CL could still maintain a desorption rate of more than 75%, indicating that La-CL exhibited a certain degree of regenerative performance. Moreover, the adsorption behaviors of phosphate onto the La-CL adsorbents were fitted to the Freundlich isotherm and pseudo-second-order model, suggesting chemical adsorption and a heterogeneous adsorption process. The mechanistic studies revealed that ligand exchange played a significant role in the adsorption of phosphate. This study would provide a strategy of “treating waste with waste” for removing phosphate from wastewater at low concentrations based on La-CL.

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Section: Introductionmentioning

confidence: 99%

Adsorption and Removal of Phosphate from Wastewater Using Lignin-Based Adsorbent Modified with Lanthanide: Characterization, Performance, and Mechanisms

Zhang

Mai

Xian

et al. 2022

Ind. Eng. Chem. Res.

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“…However, the phosphate-sorption capacity of C-ES700 was reduced by 30% compared with that of pure ESs. Panagiotou et al [28] and Lee et al [20] also reported that the phosphate-sorption capacity of C-ESs prepared at 700 °C was lower than that of C-ESs prepared at other pyrolysis temperatures. This is because the CaCO 3 in the ESs was converted into another crystalline form that is poorly soluble in an aqueous solution before the conversion to CaO.…”

Section: Phosphate-sorption Characteristics Of Ess and C-ess Calcinat...mentioning

confidence: 98%

“…In particular, C-ES900 has a higher phosphate sorption capacity than C-ES prepared at other calcination temperatures, because most of its composition is in the form of CaO, which is easily dissolved in water to form Ca-P precipitates. According to a report by Lee et al [20], during the calcination process, the specific surface area of the ESs increases owing to the emission of CO 2 , and the surface exhibits a positive charge, which is further improved as the pyrolysis temperature increases. These factors also contribute to the high sorption of phosphate when using C-ES900.…”

Section: Phosphate-sorption Characteristics Of Ess and C-ess Calcinat...mentioning

confidence: 99%

“…The main component of ES is calcium carbonate (CaCO 3 ), which has been studied extensively as a material capable of effectively adsorbing/precipitating phosphate via ion exchange and complex formation in aqueous solutions [18]. In particular, it has been reported that calcined ESs (C-ESs) prepared at high calcination temperatures have a higher affinity for phosphate than pure ESs owing to the physicochemical changes from the treatment [19,20]. However, most of the studies on the sorption properties of conventional ESs and C-ESs were performed at low phosphate concentrations, indicating that their sorption capacity may have been underestimated.…”

Section: Introductionmentioning

confidence: 99%

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Removal of phosphates using eggshells and calcined eggshells in high phosphate solutions

et al. 2022

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This study was conducted to evaluate the phosphate sorption properties of eggshell (ES) and calcined ESs (C-ESs) in a high-concentration phosphate solution. The C-ESs yield decreased rapidly at 900 °C, indicating that the CaCO3 constituting the ES was converted to CaO by the high calcination temperature. The optimum calcination temperature for phosphate removal using C-ES was 900 °C. The actual sorption amount of phosphate by ES and C-ES900 was in agreement with the Langmuir isothermal sorption equation, and the maximum sorption capacities derived from this equation were 178.6 and 270.3 mg/g, respectively. The sorption rate of phosphate by ES and C-ES900 was divided into two stages: an initial fast sorption stage, followed by a slow sorption stage. The sorption of phosphate by ES was dominantly influenced by the initial pH and salt concentration, whereas C-ES900 exhibited a constant sorption capacity regardless of environmental changes. The SEM–EDS and XRD results demonstrated that phosphate was successfully adsorbed on the ES and C-SE900 surfaces. In this study, it was found that the sorption of phosphate by ES occurred via ion exchange and precipitation reactions and that the sorption of phosphate by C-ES900 was dominantly affected by precipitation. Above all, C-ES can be applied as an effective adsorbent for removing high concentrations of phosphate under a wide range of environmental conditions.

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“…Hu et al [ 23 ] prepared a hierarchical CuAl/biomass carbon fiber LDH for phosphate removal, and the removal rate reached up to 99.6% within 50 min. However, most of the materials used for adsorption are expensive, so the development of low-cost materials that can be used for the removal of phosphate via adsorption has attracted intensive interest [ 24 , 25 ]. Li et al [ 26 ] found that the maximum capacity of the drinking-water treatment residuals (DWTRs) to adsorb phosphate reached 19.6 mg/g, which is mainly due to the great amounts of amorphous iron or aluminum in DWTRs.…”

Section: Introductionmentioning

confidence: 99%

Using Iron Tailings for Phosphate Removal in Cemented Phosphogypsum (PG) Backfill

et al. 2022

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Compared with the post-treatment of pollutants, such as the removal of phosphate from wastewater, it is more important to develop effective emission control strategies to reduce phosphate pollution. Phosphogypsum (PG) is a typical solid waste byproduct of phosphate production and contains high amounts of residual phosphate. In order to control the phosphate emissions during the recycling of PG aggregates for cemented backfill, another solid waste product—iron tailings (ITs)—was added during the preparation of backfill slurry. The results showed that the ITs effectively accelerated the phosphate removal in cemented PG backfill, enabling the quick reduction in the phosphate concentration to the discharge standard (<0.5 mg/L) within 15 min. This means that the emissions of phosphate to bleeding water were effectively controlled. The adsorption experiment showed that phosphate was adsorbed by the ITs, and the adsorption data fitted well with the Langmuir adsorption model (R2 = 0.98) and pseudo-second-order kinetic model (R2 = 0.99), indicating that the phosphate adsorption of ITs was a monolayer chemical adsorption. Furthermore, an unconfined compressive strength (UCS) test was performed on the backfill with the addition of ITs. Compared to the control group (without ITs), the UCS of backfill with 20% ITs increased from 1.08 MPa to 1.33 MPa, indicating that the addition of solid waste could be beneficial to the strength development of the backfill by mitigating the interference of phosphate with the hydration process. The backfill cured for 28 d was selected for the toxic leaching test, and the phosphate concentration in the leachates was always below 0.02 mg/L, indicating that ITs can effectively immobilize phosphate in backfill for a long time.

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Restoring phosphorus from water to soil: Using calcined eggshells for P adsorption and subsequent application of the adsorbent as a P fertilizer

Cited by 48 publications

References 81 publications

Adsorption and Removal of Phosphate from Wastewater Using Lignin-Based Adsorbent Modified with Lanthanide: Characterization, Performance, and Mechanisms

Adsorption and Removal of Phosphate from Wastewater Using Lignin-Based Adsorbent Modified with Lanthanide: Characterization, Performance, and Mechanisms

Removal of phosphates using eggshells and calcined eggshells in high phosphate solutions

Using Iron Tailings for Phosphate Removal in Cemented Phosphogypsum (PG) Backfill

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