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An Investigation into the growth of lolium perenne L. and soil properties following soil amendment with phosphorus‑saturated bauxite residue
Date
2022
Abstract
Reuse options for bauxite residue include treatment of phosphorus (P)-enriched wastewaters where the P-saturated media offers fertiliser potential. However, few studies have assessed the impact on soil properties. Two types of spent P-saturated bauxite residue were applied to soil and compared to conventional super phosphatefertiliser as well as a control soil. Soil physico-chemical properties, worm Eisenia fetida L. choice tests, and Lolium perenne L. growth and elemental uptake were examined. Comparable biomass and plant content for L. perenne in the P-saturated bauxite residue treatments and those receiving superphosphate, indicated no phytotoxic effects. E. fetida L. showed a signifiant preference for the control soil (58%±2.1%) over the amended soils, indicating some form of salt stress. Overall, P-saturated bauxite residue was comparable to the superphosphate fertiliser in terms of the plant performance and soil properties, indicating the potential recycling of P from waste waters using bauxite residue as a low-cost adsorbent.
Supervisor
Description
Publisher
Springer
Citation
Bulletin of Environmental Contamination and Toxicology 109, pp 13-19