Gypsum Calcination in order to Clear Impurities and to Use Phosphogypsum at its Entire Cycle Microbial Bioremediation
Year: 2025
Type: article
Abstract: The largest by-product of the phosphate industry is phosphogypsum (PG). Out of the 300 million tons of PG disposed of annually, fifty-eight percent are stacked dry. When PG stacks are exposed to water and managed waters, the moisture creates pressure that drives weight and releases acidic PG leachates into nearby aquifer frameworks. The elevated levels of sulfates, phosphorus (P), and metals in the PG water leachate can have a negative impact on the surrounding conditions. This work explores the impact of water action on the PG filtering, anaerobic bioremediation of PG leachate by natural sulfate expulsion movement (BSRA) is followed by the effect of various PG: Water proportions on the filtering handle. This afterward includes utilizing sulfate-reducing microbe’s consortium inside an anaerobic bioreactor, permitting a concurrent observing of the leachate from biochemical changes, debasements evacuation, and microbial community flow. The results show that the most noteworthy sulfates and pollutions filtering from PG with a PG: Water proportion of 1:200 (w: v). In this way, the natural treatment of the leachate shown a productive evacuation of sulfates (79%), P (99%) and chemical oxygen request (93%), with a significant decrease in metal concentrations (Cd, As and Al by 99%, and Zn by 70%) from the leachate. Besides, the causticity of the leachate was too neutralized through the BSRA handle by expanding the pH from 4 to 7.52. Moreover, the community of microbial flow disclosed a noteworthy relationship between the leachate’s biochemical changes and co-existence of particular sulfate-reducing microscopic organisms inside different bacterial phyla, counting Desulfobacterota, Firmicutes, and Proteobacteria, permitting proficient and eco-friendly bioremediation handle of PG leachate. As it discusses the bioremediation of phosphogypsum leachate by removing impurities like sulfates, metals, and improving ph. This aligns with your focus on using microbial bioremediation to treat and purify phosphogypsum for its entire cycle.
Author: Zanyar Othman Omar1, Ivan Kamal Hamasalih2, Ali Mohammed Salih3, Kochar Samad Mohammed4, Solin Jawhar Mohammed Sdiq5, Shazhir Mohammed Ali Rasul6, Roshna Akram Ali7, Kamaran Qader Yaqub8, Abdulrahman Ahmed Mahmood9
Language: English
Subfield: Environmental Chemistry
Field: Environmental Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6912099124
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