Novel regeneration method for phosphate loaded granular ferric (hydr)oxide – A contribution to phosphorus recycling

Kunaschk, Marco; Schmalz, Viktor; Dietrich, Norman; Dittmar, Thomas; Worch, Eckhard

doi:10.1016/j.watres.2015.01.001

Cited by 62 publications

(46 citation statements)

References 21 publications

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“…Along with the increase of in the lime proportion in the pellet, P absorption rate also increased. Earlier studies have shown the similar results on calcium-based P filter materials (Kunaschk et al, 2015;Spears et al, 2013;Yin and Kong, 2014;Yin et al, 2013). At the same time, the higher lime proportion in the pellet resulted in lesser Cr…”

Section: Discussionsupporting

confidence: 65%

Characterization of fly ash ceramic pellet for phosphorus removal

Cooke

Wang

et al. 2017

Journal of Environmental Management

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Phosphorus has been recognized as a leading pollutant for surface water quality deterioration. In the Midwestern USA, subsurface drainage not only provides a pathway for excess water to leave the field but it also drains out nutrients like nitrogen (N) and phosphorus (P). Fly ash has been identified as one of the viable materials for phosphorus removal from contaminated waters. In this study, a ceramic pellet was manufactured using fly ash for P absorption. Three types of pellet with varying lime and clay proportions by weight (type 1: 10% lime + 30% clay, type 2: 20% lime + 20% clay, and type 3: 30% lime + 10% clay) were characterized and evaluated for absorption efficiency. The result showed that type 3 pellet (60% fly ash with 30% lime and 10% clay) had the highest porosity (14%) and absorption efficiency and saturated absorption capacity (1.98 mg P/g pellet) compared to type 1 and 2 pellets. The heavy metal leaching was the least (30 μg/L of chromium after 5 h) for type 3 pellet compared to other two. The microcosmic structure of pellet from scanning electron microscope showed the type 3 pellet had the better distribution of aluminum and iron oxide on the surface compared other two pellets. This result indicates that addition of lime and clay can improve P absorption capacity of fly ash while reducing the potential to reduce chromium leaching.

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Section: Discussionsupporting

confidence: 65%

Characterization of fly ash ceramic pellet for phosphorus removal

Cooke

Wang

et al. 2017

Journal of Environmental Management

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“…In a similar way, composite adsorbents having active sites immobilized/impregnated on a backbone involve more chemicals/steps to produce or modify the adsorbent; hence these approaches can be associated with more expensive adsorbents (Fang et al., 2017b; Ge et al., 2016; Huang et al., 2015). Synthesized adsorbents comprising chiefly of metal oxides with no additional backbones can be considered in the intermediate cost category and include granular iron oxide based adsorbents (Genz et al., 2004; Kunaschk et al., 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Sulphate can exist as both inner or outersphere complexes on metal oxide surfaces (Wijnja and Schulthess, 2000). Carbonate can bind via electrostatic attraction but can also form calcium carbonate surface precipitates (Chitrakar et al., 2006; Kunaschk et al., 2015). Dissolved organic matter like humic acids and fulvic acids can also compete with phosphate adsorption via direct competition with the active sites as well as steric hindrance (Fu et al., 2013; Antelo et al., 2007, Weng et al., 2012)…”

Section: Introductionmentioning

confidence: 99%

Adsorption as a technology to achieve ultra-low concentrations of phosphate: Research gaps and economic analysis

Korving²,

et al. 2019

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Eutrophication and the resulting formation of harmful algal blooms (HAB) causes huge economic and environmental damages. Phosphorus (P) from sewage effluent and agricultural run-off has been identified as a major cause for eutrophication. Phosphorous concentrations greater than 100 μg P/L are usually considered high enough to cause eutrophication. The strictest regulations however aim to restrict the concentration below 10 μg P/L. Orthophosphate (or phosphate) is the bioavailable form of phosphorus. Adsorption is often suggested as technology to reduce phosphate to concentrations less than 100 and even 10 μg P/L with the advantages of a low-footprint, minimal waste generation and the option to recover the phosphate. Although many studies report on phosphate adsorption, there is insufficient information regarding parameters that are necessary to evaluate its application on a large scale. This review discusses the main parameters that affect the economics of phosphate adsorption and highlights the research gaps. A scenario and sensitivity analysis shows the importance of adsorbent regeneration and reuse. The cost of phosphate adsorption using reusable porous metal oxide is in the range of $ 100 to 200/Kg P for reducing the phosphate to ultra-low concentrations. Future research needs to focus on adsorption capacity at low phosphate concentrations, regeneration and reuse of both the adsorbent and the regeneration liquid.

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“…Phosphorus is considered a fundamental nutrient for industrial and agricultural production, whereas high concentration of phosphorus in wastewater discharge could destroy the ecological balance and bring serious environmental problems . It is well‐recognized that a phosphorus concentration above 0.02 mg L −1 in receiving water could cause eutrophication .…”

Section: Introductionmentioning

confidence: 99%

Adsorption of phosphorus based on Hangjin clay granular ceramic from aqueous solution and sewage: Fixed‐bed column study

Chen

Wang

et al. 2017

Env Prog and Sustain Energy

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The aim of this study was to evaluate the potential use of the Hangjin clay ceramic adsorbent for phosphorus removal from aqueous solution and municipal sewage in column systems. The effect of several factors, including bed depth, initial phosphorus concentration, and flow rate was investigated at room temperature. As a result, the breakthrough time increased with increasing in the bed depth, whereas inverse relationship was observed with the initial phosphorus concentration and flow rate. Moreover, municipal sewage treatment results proved the effectiveness of the adsorbent in practical application and further demonstrated some co-existing ions in sewage had little effect on the continuous adsorption process. Adsorption models, which are the basis for the process design at a real scale, were used to estimate the characteristic parameters of columns. The dynamic adsorption kinetic data well agreed with the Adams-Bohart and Clark models. The Yoon-Nelson and BDST models could be successfully used to predict the breakthrough time. The observed maximum dynamic adsorption capacity of the ceramic adsorbent for phosphorus removal was 19.28 mg g 21 . The Hangjin clay granular ceramic could be used as a high-efficiency phosphorus adsorbent in the aspect of the municipal sewage treatment.

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Novel regeneration method for phosphate loaded granular ferric (hydr)oxide – A contribution to phosphorus recycling

Cited by 62 publications

References 21 publications

Characterization of fly ash ceramic pellet for phosphorus removal

Characterization of fly ash ceramic pellet for phosphorus removal

Adsorption as a technology to achieve ultra-low concentrations of phosphate: Research gaps and economic analysis

Adsorption of phosphorus based on Hangjin clay granular ceramic from aqueous solution and sewage: Fixed‐bed column study

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