Soil Chemical Properties, Enzyme Activity and Soybean and Corn Yields in a Tropical Soil Under No-till Amended with Lime and Phosphogypsum

Costa, Rodolfo Fagundes; Firmano, Ruan Francisco; Bossolani, João William; Alleoni, Luís Reynaldo Ferracciú

doi:10.1007/s42106-023-00233-8

Cited by 4 publications

(4 citation statements)

References 80 publications

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“…Given this, harmless, reduced disposal, and cyclic utilization of phosphogypsum is urgently needed in the phosphorus chemical industry . Currently, phosphogypsum derived from phosphoric acid plant is extensively explored and utilized in construction materials, − chemical industry, − and agriculture. , …”

Section: Introductionmentioning

confidence: 99%

“…6 Currently, phosphogypsum derived from phosphoric acid plant is extensively explored and utilized in construction materials, 7−11 chemical industry, 12−14 and agriculture. 15,16 SO 2 flue gas and cement clinker can be acquired from the process for sulfuric acid and cement based on phosphogypsum by adding lay, bauxite, and coke to the phosphogypsum, followed by calcination in a rotary kiln. The process not only consumes plenty of phosphogypsum waste but also achieves the circulating utilization of sulfur and calcium resources, 17−21 which retains practical significance and economic benefits considering the serious sulfur shortage in China.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Process Optimization and Mechanism Study for Sulfur Recovery from High-Silica Phosphogypsum via Carbothermal Reduction Smelting

Wang,

Hou,

et al. 2024

ACS Omega

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Phosphogypsum produced from wet-processed phosphoric acid mainly consists of calcium sulfate dihydrate, which is an important sulfur resource. The traditional sulfuric acid and cement process based on phosphogypsum suffers from unstable cement quality owing to impurities such as phosphorus and fluorine and kiln ringing caused by the low-melting phase. This study investigated sulfur recovery and value-added utilization of liquid slag from high-silica phosphogypsum via carbothermal reduction smelting. A phosphogypsum ingredient (PGI) system was constructed by adding appropriate amounts of silica, alumina, magnesium oxides, and iron oxides to meet the production requirements of slag wool. Carbothermal reduction smelting experiments suggested that the temperature and C/S molar ratio significantly affected the desulfurization rate and phase structure of the slag. More than 97.44 wt % of sulfur could be recovered with a C/S molar ratio of 0.5−0.8 at 1300 °C or above in the molten state, and the molten slag was an amorphous magnesium−calcium−aluminosilicate. The PGI desulfurization mechanism is discussed based on the phase transformation and slag microstructure evolution.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Process Optimization and Mechanism Study for Sulfur Recovery from High-Silica Phosphogypsum via Carbothermal Reduction Smelting

Wang,

Hou,

et al. 2024

ACS Omega

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“…Phosphogypsum contains nutrients such as phosphorus, sulfur, calcium, and silicon required for plant growth. Some experimenters have, therefore, applied phosphogypsum as a soil amendment in agricultural production and achieved some valuable results [8][9][10]. Due to the low porosity of phosphogypsum, soil consolidation may occur after application.…”

Section: Introductionmentioning

confidence: 99%

Influence of EMR–Phosphogypsum–Biochar Mixtures on Sudan Grass: Growth Dynamics and Heavy Metal Immobilization

Luo,

Liu,

Luo

et al. 2024

Agronomy

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This study investigates the growth dynamics and heavy metal immobilization in Sudan grass cultivated on substrates composed of electrolytic manganese residue (EMR), phosphogypsum, and chili straw biochar. Pot experiments revealed that a substrate with phosphogypsum constituting 75% of the mix hinders Sudan grass seed germination. Compared with sole EMR utilization, the composite substrates notably enhanced plant growth, evidenced by increases in plant height and fresh weight. The integration of these substrates led to a significant elevation in total chlorophyll content (up to 54.39%) and a reduction in malondialdehyde (MDA) levels (up to 21.66%), indicating improved photosynthetic activity and lower oxidative stress. The addition of biochar reduced the content of Zn, Cd, and Mn in the roots of Sudan grass by up to 25.92%, 20.00%, and 43.17%, respectively; and reduced the content of Pb, Mn, and Cr in the shoot by up to 33.72%, 17.53%, and 26.32%, respectively. Fuzzy membership function analysis identified the optimal substrate composition as 75% EMR and 25% phosphogypsum, with 5% chili straw biochar, based on overall performance metrics. This study adopts the concept of “to treat waste with waste”. The approach is to fully consider the fertility characteristics of EMR, phosphogypsum, and biochar, underscoring the potential for utilizing waste-derived materials in cultivating Sudan grass and offering a sustainable approach to plant growth and heavy metal management.

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Mitigating life-cycle environmental impacts and increasing net ecosystem economic benefits via optimized fertilization combined with lime in pomelo production in Southeast China

Yan,

Ma,

Kong

et al. 2024

Science of The Total Environment

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Soil Chemical Properties, Enzyme Activity and Soybean and Corn Yields in a Tropical Soil Under No-till Amended with Lime and Phosphogypsum

Cited by 4 publications

References 80 publications

Process Optimization and Mechanism Study for Sulfur Recovery from High-Silica Phosphogypsum via Carbothermal Reduction Smelting

Process Optimization and Mechanism Study for Sulfur Recovery from High-Silica Phosphogypsum via Carbothermal Reduction Smelting

Influence of EMR–Phosphogypsum–Biochar Mixtures on Sudan Grass: Growth Dynamics and Heavy Metal Immobilization

Mitigating life-cycle environmental impacts and increasing net ecosystem economic benefits via optimized fertilization combined with lime in pomelo production in Southeast China

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