A Precipitation-Adsorption Technique for the Removal of Fluoride and Phosphate in Phosphogypsum: an Economical and Green Method

Zhang, Luo; An, Zibo; Zhang, Hao; Hu, Yong; Chen, Hong; Xue, Junmin

doi:10.1007/s42461-022-00539-7

Cited by 5 publications

(4 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Soluble phosphorus and fluorine from phosphogypsum reservoirs can potentially leak, leading to environmental pollution. 3 For instance, leaks of phosphogypsum plants have caused acidic water to rush into downstream water bodies, killing mangrove and fishes. 4 Such disasters have occurred multiple times in Florida, 5 with one major chronic issue being the eutrophication of nearby water bodies.…”

Section: Introductionmentioning

confidence: 99%

“…It is very acidic and contains significant amount of phosphorus and fluoride, presenting a severe threat to the environment and causing acute and chronic adverse effects on the ecosystem. Soluble phosphorus and fluorine from phosphogypsum reservoirs can potentially leak, leading to environmental pollution . For instance, leaks of phosphogypsum plants have caused acidic water to rush into downstream water bodies, killing mangrove and fishes .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Bioremediation of Modified Phosphogypsum to Cultivable Anthrosol via Peanut Growth

Cao,

Deng,

Hou

et al. 2024

ACS Sustainable Resour. Manage.

View full text Add to dashboard Cite

Phosphogypsum stacks have become a global environmental concern due to their massive annual production. While their primary application lies in construction, the scale of utilization pales in comparison to the production volume, necessitating the exploration of expansive, innovative applications. This study pioneers a simple and efficient strategy for phosphogypsum bioremediation, transforming modified phosphogypsum into a sustainable anthrosol. The strategy involved treating fresh phosphogypsum with calcium oxide at a 100:5 mass ratio, successfully reducing fluoride ion concentrations in the leachate to below 15.0 ppm, while maintaining an ambient pH of around 7.6. Employing peanut growth as our bioremediation model, we cultivated using 100% modified phosphogypsum. The germination rate soared to 96.0%, with a 16-week seedling average height of 19.5 cm, mirroring growth metrics in natural soil. Throughout the cultivation, notable enhancements in the total organic carbon (TOC) and total nitrogen (TN) were observed in the modified phosphogypsum. A thriving microecosystem was gradually established and characterized by the proliferation of microbial species such as gammaproteobacteria, cyanobacteria, and alphaproteobacteria. These results illuminate a transformative pathway to mitigate the challenge of phosphogypsum surplus by converting it into recyclable anthrosol, setting a precedent for potential bioremediation strategies across various industrial solid industrial wastes.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bioremediation of Modified Phosphogypsum to Cultivable Anthrosol via Peanut Growth

Cao,

Deng,

Hou

et al. 2024

ACS Sustainable Resour. Manage.

View full text Add to dashboard Cite

show abstract

“…Therefore, reducing the content of impurity elements in phosphogypsum, increasing the main content of calcium sulfate, and improving the harmless comprehensive utilization rate of phosphogypsum resources are of great significance to the sustainable and healthy development of the phosphorus chemical industry. In recent years, research on the occurrence state of various impurity elements in phosphogypsum and impurity removal technologies has become one of the most popular research topics among scientists and technological workers [ 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 ]. According to the contents of various elements in typical phosphogypsum in China, the scope of this review focuses on major impurity components (wt% > 1%, including silicon and phosphorus) and trace impurity components (wt% 0.01–1%, including iron, aluminum, and carbon) in phosphogypsum, excluding other minor trace and elemental impurity components (wt% < 0.01%, such as heavy metals, rare earth elements, and radioactive elements).…”

Section: Introductionmentioning

confidence: 99%

Review of the State of Impurity Occurrences and Impurity Removal Technology in Phosphogypsum

Liu

2023

Materials

View full text Add to dashboard Cite

A variety of co-existing impurities in phosphogypsum limit its large-scale and high-value utilization. This paper summarizes the common contents of major impurity components (silicon and phosphorus) and trace impurity components (fluorine, iron, aluminum, and carbon) in phosphogypsum and discusses the harm of impurity components to the comprehensive utilization of harmless phosphogypsum chemical resources. The occurrence status of impurity components in phosphogypsum and the research progress of various impurity removal technologies are summarized, and the effects of these impurity removal technologies on different contents of impurity components are evaluated. On this basis, the goal of improving the whiteness of phosphogypsum samples and the development of technology for further removal of impurities in phosphogypsum to improve the purity of the main content of calcium sulfate are speculated.

show abstract

“…Due to the presence of residues of phosphoric acid and other impurities such as fluorine in PG, its use may lead to a higher demand for alkalinity in such matrices [11]. Research has found that rich aluminate calcium silicate hydrate plays a crucial role in the solidification of phosphorus and fluorine, which has certain requirements for the content of silicon, aluminum, and calcium phases in the raw materials [12,13]. The use of alkaline-active materials (AAM) such as cement and geopolymer, is one effective method.…”

Section: Introductionmentioning

confidence: 99%

The Influence Mechanism of Molar Ratio on the Performance of Phosphogypsum-Modified Geopolymer Material

Xu,

Zhang,

et al. 2023

Coatings

View full text Add to dashboard Cite

Comprising a relatively large amount of industrial solid waste, the high-value utilization of phosphogypsum (PG) is closely related to the sustainable development of resource materials and the protection of the ecological environment. PG can improve some of the shortcomings of geopolymers, but there is a lack of systematic research on the specific influencing factors as well as the mechanism of the two in a hydration reaction. In this study, the effects of the Si/Al, Na/Al and Ca/Al ratios on the micropores as well as the hydration products of phosphogypsum-modified geopolymer material (PMGM) are systematically explored via macroscopic and microscopic tests from the molar ratios of the raw material’s target components. By changing the molar ratio, the generation of hydration products is affected, thereby altering the properties of the material. The effects of each molar ratio on paste workability, capillary water absorption, drying shrinkage and self shrinkage are systematically analyzed, while the types, productions, and micropores of hydration products are analyzed via XRD and SEM. This study provides a new idea for the large-scale recycling of PG and makes a systematic investigation of its hydration mechanism, which can provide a reference for the reaction principle of PG with geopolymers.

show abstract

A Precipitation-Adsorption Technique for the Removal of Fluoride and Phosphate in Phosphogypsum: an Economical and Green Method

Cited by 5 publications

References 20 publications

Bioremediation of Modified Phosphogypsum to Cultivable Anthrosol via Peanut Growth

Bioremediation of Modified Phosphogypsum to Cultivable Anthrosol via Peanut Growth

Review of the State of Impurity Occurrences and Impurity Removal Technology in Phosphogypsum

The Influence Mechanism of Molar Ratio on the Performance of Phosphogypsum-Modified Geopolymer Material

Contact Info

Product

Resources

About