AI Article Synopsis
- Reactive filter materials for phosphorus removal from wastewater can be reused as soil amendments, effectively recycling nutrients for plants.
- Polonite, a material with high pH and calcium, helps improve acid soils and has been tested in mountain meadows, increasing soil pH while reducing acidity and aluminum toxicity.
- The application of Polonite shows similar benefits to traditional liming without negatively affecting plant yield or phosphorus uptake, making it a sustainable alternative for nutrient recycling in agriculture.
Article Abstract
Reactive filter materials used for phosphorus (P) removal from wastewater can be disposed of as soil amendments after treatment, thus recycling P and other macro- and micro-nutrients to plants. In addition, materials with a high pH and Ca content, such as Polonite, are potential soil conditioners, which can be particularly beneficial for acid soils. Polonite previously used for on-site wastewater treatment was applied as a soil amendment to a mountain meadow. The amendment significantly increased soil pH and decreased the hydrolytic acidity, thus reducing Al toxicity risks. The effects were comparable to those of liming. No difference in yield and P uptake by meadow plants was observed. The uptake of metals was lower for amended soils, especially the uptake of Mn. Using Polonite after wastewater treatment as a soil amendment is thus a viable disposal alternative that can replace liming, when necessary, being capable of recycling P and other nutrients to meadow plants.
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| http://dx.doi.org/10.1016/j.envpol.2009.02.007 | DOI Listing |
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