Phosphorus recovery from wastes has become a worldwide concern. The P-bearing steelmaking slag generated from steel plant is considered a potential phosphorus source. In this study, a novel process of selective leaching-precipitation-alkaline wash was proposed to recover high-quality phosphate from steelmaking slag. During leaching, most of the P was dissolved from slag and Fe was almost insoluble. Increasing temperature and solid-liquid ratio significantly suppressed the dissolution of Si due to the formation of silica sols. An excellent selective leaching of P was achieved at pH 3 and 333 K. The dissolution ratio of P reached 83.5% while only 22.6% of Si was dissolved. The residue containing 49.5% FeO and 0.9% PO can be reused as a steelmaking feedstock, achieving the recycling in plant. In the dilute leachate, the precipitation of Si and Ca was significantly suppressed as the pH increased and a precipitate with higher PO content and lower SiO content was extracted. A large amount of SiO was removed from the precipitate by alkaline wash. A precipitate containing 30.1% PO and 45.5% CaO was recovered in this process. This study provided a cost-effective approach to recovering high-quality phosphate.
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http://dx.doi.org/10.1016/j.scitotenv.2022.153125 | DOI Listing |
Front Microbiol
January 2025
Rice Research Institute, Guangdong Academy of Agricultural Sciences/Guangdong Key Laboratory of New Technology in Rice Breeding/Guangdong Rice Engineering Laboratory/Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China (Co-construction by Ministry and Province), Ministry of Agriculture and Rural Affairs, Guangzhou, China.
Low phosphorus (P) use efficiency significantly impacts rice yields. An environmentally friendly approach to increase phosphorus absorption and utilization in rice involves the exploration of phosphorus-solubilizing fungal resources. This study aimed to isolate and characterize fungal strains from the rice rhizosphere and assess their phosphate solubilization capabilities, plant-growth-promoting (PGP) traits, and mechanisms involved.
View Article and Find Full Text PDFAdv Mater
January 2025
Institute of Thin Film Physics and Applications, Shenzhen Key Laboratory of Advanced Thin Films and Applications, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, State Key Laboratory of Radio Frequency Heterogeneous Integration, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China.
Anisotropic carrier transport and deep-level defect of antimony selenosulfide (Sb(S,Se)) absorber are two vital auses restraining the photovoltaic performance of this emerging thin-film solar cell. Herein, chelate engineering is proposed to prepare high-quality Sb(S,Se) film based on hydrothermal deposition approach, which realizes desirable carrier transport and passivated defects by using tetrahedral PO ion in dibasic sodium phosphate (NaHPO, DSP). The PO Lewis structure, on one hand in the form of [(SbO)(PO)] chelate, can adsorb on the polar planes of cadmium sulfide (CdS) layer, promoting the heterogeneous nucleation, and on the other hand, the tetrahedral PO inhibits horizontal growth of (SbS(e)) ribbons due to size effects, thus achieving desirable [hk1] orientation.
View Article and Find Full Text PDFJ Cosmet Dermatol
January 2025
College of Medicine, Department of Dermatology, Imam Mohammad Ibn Saud University, Riyadh, Saudi Arabia.
Background: Acne is a common condition observed in adolescents and in most severe acne the scars develop. There are numerous treatment options for acne scars. However, no standardized guidelines have been established to guide physicians in the optimal treatment of acne scars.
View Article and Find Full Text PDFFront Plant Sci
December 2024
Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China.
Drought, a major consequence of climate change, initiates molecular interactions among genes, proteins, and metabolites. a high-quality perennial grass species, exhibits robust drought resistance. However, the molecular mechanism underlying this resistance remaining largely unexplored.
View Article and Find Full Text PDFBMC Plant Biol
December 2024
College of Forestry, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China.
Background: Pinus thunbergii is an economically important conifer species that plays a fundamental role in forest ecosystems. However, the population has declined dramatically in recent years as a result of the pine wilt disease outbreak. Thus, developing pine wilt-resistant P.
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