Phosphorus removal from wastewater using rice husk and subsequent utilization of the waste residue

Use ofPhragmites australisfor controlling phosphorus contamination in anthropogenic wetland ecosystems

“…These authors demonstrate that the adsorption increases when the pH decreases. However, other authors conclude for rice husk that a reduction in pH also reduces the absorption capacity [35]. Furthermore, other research studies reach the final maximum level of absorption capacity around a neutral pH in the case of rice husk and fruit residues [51].…”

“…Furthermore, the research aims to assess the viability of using ashes from other plant materials produced by wetland agriculture (specifically rice straw ash) to complement the obtained reed ash in order to eliminate phosphorus. Finally, following the experiences of other authors with other plant ashes [35,36], the research also analyses the subsequent utilization of reed ash, after phosphorus removal, as natural fertilizer in wetland rice plantations, closing the circular economy system [37].…”

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

“…A wide variety of phosphate adsorbents have been synthesized or studied regularly. These range from using waste materials or byproducts like food residue or slag to using engineered adsorbents based on for instance, metal-organic-frameworks or layered nanosheets (Abbas, 2015; Fang et al., 2015; Sellner et al., 2017; Xie et al., 2017). It is important to note that both waste materials and engineered adsorbents can have inorganic (for e.g.…”

Utilización de residuos vegetales para la eliminación de fósforo en aguas residuales mediante procesos de adsorción

“…Additionally, the bibliography reports the capacity shown by different kinds of ashes to adsorption (Cheung and Venkitachalam, 2000;Lu et al, 2009;Pengthamkeerati et al, 2008 Salman, 1998), but the use of rice straw ash as an adsorbent is not found in bibliography. At the same time, the results corroborate the findings of Abbas (2015) and Karageorgiou (2007), who reported that the product generated after adsorption treatment would have a high fertiliser value in the essential and nonrenewable macronutrient for the plant growth, due to its higher phosphorus content (Cordell et al, 2009…”

“…However, other authors conclude for rice husk that a reduction in pH also reduces the absorption capacity (Abbas, 2015). Furthermore, other research studies reach the final maximum level of absorption capacity around a neutral pH in the case of rice husk and fruit residues (Yadav et al, 2015).…”