Department of Biological Sciences, University of Limerick, Castletroy, Co. Limerick, Ireland.
The Bernal Institute, University of Limerick, Castletroy, Co. Limerick, Ireland.
Bull Environ Contam Toxicol. 2022 Jul;109(1):13-19. doi: 10.1007/s00128-022-03514-6. Epub 2022 Apr 7.
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 superphosphate fertiliser 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 significant 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 wastewaters using bauxite residue as a low-cost adsorbent.
铝土矿残渣的再利用选择包括处理富磷（P）废水，其中磷饱和的介质具有肥料潜力。然而，很少有研究评估其对土壤性质的影响。两种类型的磷饱和铝土矿残渣被应用于土壤，并与传统过磷酸盐肥料和对照土壤进行了比较。研究了土壤理化性质、赤子爱胜蚓（Eisenia fetida L.）选择试验以及黑麦草（Lolium perenne L.）生长和元素吸收情况。在接受磷饱和铝土矿残渣处理和接受过磷酸盐的处理中，黑麦草的生物量和植物含量相当，表明没有植物毒性效应。赤子爱胜蚓（Eisenia fetida L.）对对照土壤（58%±2.1%）表现出明显的偏好，而对改良土壤的偏好程度较低，表明存在某种形式的盐胁迫。总体而言，磷饱和铝土矿残渣在植物性能和土壤性质方面与过磷酸盐肥料相当，表明可以利用铝土矿残渣作为低成本吸附剂从废水中回收磷。
