Hydrated calcareous oil-shale ash as potential filter media for phosphorus removal in constructed wetlands

Kaasik, Ago; Vohla, Christina; Mõtlep, Riho; Mander, Ülo; Kirsimäe, Kalle

doi:10.1016/j.watres.2007.10.002

Cited by 83 publications

(40 citation statements)

References 25 publications

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“…Also, the P content was 2.12%, twice the concentration in the slag. The content of P found on the substrates was not as much as those reported in other studies [44], which might be because of the low P concentration in the secondary effluent. However, it was quite clear that the P removal mechanisms were mostly linked to Ca in the SCW, and to Fe and Al in the GCW.…”

Section: P-removal Mechanismscontrasting

confidence: 76%

Variations in Phosphorus Speciation in Pilot Scale Subsurface Flow Wetlands Constructed with Blast Furnace Slag and Gravel

Shan

Cheng

2009

CLEAN Soil Air Water

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Variations in phosphorus (P) speciation were compared for two types of pilot scale wetlands: a blast furnace slag-based constructed wetland (SCW), and a gravel-based constructed wetland (GCW). Synthetic secondary effluent was used as the influent of the wetlands, which contained 1.1 mg/L P with more than 95% present as soluble reactive P (SRP). However, dissolved organic phosphorus (DOP) and particulate phosphorus (PP) emerged in the water along both wetlands. The levels of these three P species varied between the two wetlands. The GCW was more efficient than SCW at removing SRP, but showed a different trend. SRP decreased continually in the SCW, while it increased at the end of the GCW due to biological release. DOP was constant in SCW and GCW, and the mean value was 0.023 and 0.020 mg/L, respectively. The mean values of PP in the GCW ranged between 0.093 and 0.216 mg/L; much higher than the 0.05 l 0.01 mg/L measured in the SCW. Sequential extractions showed that iron bound PP (Fe-PP), aluminum bound PP (Al-PP), organic PP (Org-PP) and occluded PP (Oc-PP) were the major components of PP at most locations of the GCW. Fe-PP decreased from 0.53 to 0.14 mg/L in the upper layer, with DO steady at about 0.15 mg/L at the bottom. Oc-PP increased at each layer. Al-PP and Org-PP were steady in the first 140 cm of the GCW, but decreased sharply at the end. Considering the variation of SRP, DOP and PP fractionations, it can be seen that PP exchanged intensively with SRP in the GCW, and might act as an intermediate in the P removal process. Part of the SRP was first transformed into PP, and then absorbed by substrates or deposited in the wetlands. P removal was mainly via Ca precipitation in the SCW, but involved multiple mechanisms in the GCW, such as precipitation, adsorption and biological interactions. The multiple P removal mechanisms might be the reason for the low proportion of SRP, and the better P removal efficiency observed in the GCW.

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Section: P-removal Mechanismscontrasting

confidence: 76%

Variations in Phosphorus Speciation in Pilot Scale Subsurface Flow Wetlands Constructed with Blast Furnace Slag and Gravel

Shan

Cheng

2009

CLEAN Soil Air Water

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“…Phosphorus adsorption capacity of slagCSH after 24 h of adsorption was determined to be 53.11 P-mg/g, which was 73 times greater than that of BF slag. This phosphorus adsorption capacity is markedly higher than those previously reported on solid adsorbents derived from minerals and industrial wastes, [9][10][11][12][13][14] demonstrating its excellent adsorption ability toward phosphate ions in water. PureCSH as a reference sample exhibited a higher phosphorus adsorption capacity (86.23 P-mg/g) than slagCSH irrespective of its subpar structural properties (S BET = 154 m 2 /g, V total = 0.62 cm 3 /g).…”

Section: Adsorption Of Phosphatecontrasting

confidence: 54%

“…Adsorption using high-volume industrial wastes has attracted increasing concerns as an alternative phosphorus recovery process, because of simple manipulation, less sludge production and economic competitiveness. To date, various kinds of industrial wastes were examined as low-cost phosphorus adsorbent, including fly ash, 9,10) red mud, 11) oil-shale ash, 12) acid mine drainage sludge, 13) and dolomite; 14) however, the adsorption capacities of these adsorbents were considerably low.…”

Section: )mentioning

confidence: 99%

Phosphate Removal from Aqueous Solutions Using Calcium Silicate Hydrate Prepared from Blast Furnace Slag

Kuwahara

Yamashita

2017

ISIJ International

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“…Verifica-se na Tabela 5 que não houve diferença significativa na remoção de potássio entre os SACs vegetados (SAC 2 e SAC 3 ) e não vegetados (SAC 1 ), diferentemente do que foi observado por Matos et al (2010a) elemento fósforo e substâncias tóxicas das águas residuárias, tanto pela adsorção, quando o material é utilizado como material suporte, quanto pela precipitação de formas químicas estáveis de fosfato (DeBUSK et al, 2004;TANAKA et al, 2007;KAASIK et al, 2008). pode ter ocorrido nos SACs operados neste experimento e contribuído para a formação da estruvita, reduzindo as concentrações de P, magnésio e amônio efluentes dos SACs.…”

Section: Remoção De Potássio Sódio Cálcio E Magnésiounclassified

Efeito da vegetação em sistemas alagados construídos para tratar águas residuárias da suinocultura

Fia

Matos

Fia

et al. 2016

Eng. Sanit. Ambient.

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RESUMONo presente trabalho, objetivou-se avaliar a influência da vegetação em sistemas alagados construídos (SACs) na remoção de poluentes da água residuária da suinocultura (ARS Artigo TécnicoEfeito da vegetação em sistemas alagados construídos para tratar águas residuárias da suinocultura Keywords: pig manure; wetlands; cattail; bermudagrass. Effect of vegetation in constructed wetlands treating swine wastewater INTRODUÇÃOA suinocultura é uma atividade pecuária que se expandiu muito nas últimas décadas, por conta do aumento da demanda de carnes e de derivados suínos, entretanto o desenvolvimento da suinocultura tem como fator de maior preocupação a quantidade de dejetos produzidos, que apresentam alto poder poluente, especialmente quando lançados sem tratamento em corpos hídricos. Entre as soluções simples propostas para o tratamento de águas residuárias ricas em material orgânico, como é o caso das provenientes de granjas suinícolas, distingue-se a sua disposição em sistemas alagados construídos (SACs) (SEZERINO et al., 2003;GONZÁLEZ et al., 2009;BORGES, 2011;WANG et al., 2014), por ser uma forma viável e barata para o tratamento dessas águas.Entre os componentes dos SACs, destacam-se as macrófitas, que formam uma das comunidades mais produtivas no ambiente aquá-tico, desempenhando importante papel na dinâmica dos nutrientes.Além da alta produtividade de sua biomassa, elas favorecem processos microbiológicos e bioquímicos para a decomposição da matéria

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Hydrated calcareous oil-shale ash as potential filter media for phosphorus removal in constructed wetlands

Cited by 83 publications

References 25 publications

Variations in Phosphorus Speciation in Pilot Scale Subsurface Flow Wetlands Constructed with Blast Furnace Slag and Gravel

Variations in Phosphorus Speciation in Pilot Scale Subsurface Flow Wetlands Constructed with Blast Furnace Slag and Gravel

Phosphate Removal from Aqueous Solutions Using Calcium Silicate Hydrate Prepared from Blast Furnace Slag

Efeito da vegetação em sistemas alagados construídos para tratar águas residuárias da suinocultura

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