NO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e2016" altimg="si106.svg"><mml:msubsup><mml:mrow/><mml:mrow><mml:mn>3</mml:mn></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msubsup></mml:math>-N removal from water using raw and modified fibrous clay minerals and their potential application as nitrogen fertilizers in hydroponic lettuce cultivations

Lazaratou, Christina Vasiliki; Triantaphyllidou, Irene-Eva; Spyridonos, Iris; Pantelidis, Ioannis; Kakogiannis, George; Vayenas, D.V.; Papoulis, Dimitrios

doi:10.1016/j.eti.2021.102021

Cited by 6 publications

(1 citation statement)

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“…A great advantage of the adsorption method is the usage of low-cost, environmentally friendly, and in many cases natural materials, such as Pal or zeolite as adsorbents. Natural materials, saturated with NH 4 + or other nutrients can potentially be further exploited without causing secondary pollution, such as fertilizers in cultivations, even in hydroponics [ 16 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Thermally Modified Palygorskite Usage as Adsorbent in Fixed-Bed Reactor for High Concentration NH4+-N Removal and Further Application as N—Fertilizer in Hydroponic Cultivation

et al. 2022

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Palygorskite sample (Pal) underwent thermal treatment at 400 °C (T-Pal) to be used as adsorbent for the removal of 200 mg NH4+-N/L from artificial solution. After thermal treatment, the sample was characterized via X-ray diffraction (XRD) and scanning electron microscopy (SEM). For NH4+-N removal, T-Pal was added as a bed matrix in fixed-bed reactor experiments and the effect of flow rate was determined. It was indicated that with the flow rate increase from 10 mL/min to 50 mL/min, fewer liters of the solution were purified, rendering a longer residual time of interactions, which is optimal for NH4+-N removal from T-Pal. The maximum removed amount was calculated at 978 mg NH4+-N (qtotal), suggesting T-Pal is a promising ammonium adsorbent. The data of kinetic experiments were applied to Clark, Yoon–Nelson, and Thomas kinetic models, with Clark having the best fit, highlighting a heterogenous adsorption. At the end of kinetic experiments, T-Pal applied in hydroponic cultivations and presented a sufficient release rate, which was found utilizable for saturated T-Pal usage as N fertilizer that satisfactory results were deemed concerning lettuces characteristics and growth.

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Section: Introductionmentioning

confidence: 99%