Arsenic as a contaminant of struvite when recovering phosphorus from phosphogypsum wastewater

Recovery of Ammonium Nitrogen and Phosphate from the Piggery Wastewater as Struvite and Its Assessment for the Reduction of Water Pollution Through the Field Test

“…The pH of piggery wastewater was increased to 9.2 when the dose of MgO was raised to 0.8 wt.%. The increase in pH with the addition of MgO is based on the following equation (1).…”

“…However, the livestock manure is particularly recognized as a major obstacle to the continuous development of livestock industry due to the high concentration of nutrients such as nitrogen (N) and phosphorous (P) existing in it. These nutrients can cause eutrophication and dissolved oxygen depletion when they are present in excess in water bodies [1]. Therefore, environmental regulations related with livestock manure have been tightened to decrease the levels of nutrients entering into the water.…”

Struvites with Comparable Nitrogen and Phosphorus Composition Have Similar Agronomic Response But Shape Cherry Tomato Rhizosphere Bacterial Community Structure Differently

“…The chemical properties of recovered struvite can vary depending on the chemical composition of the wastewater, the chemical additives used (e. g. MgSO 4 , MgCl 2 .H 2 O), and the precipitation conditions. As shown by several studies, various minerals and elements (in various chemical forms) such as MgHPO 4 .7H 2 O, KMgPO 4 .6H 2 O, NH 4 MgAsO 4 .6H 2 O, K, Zn, Cu, Al, and Fe can be absent or present in varied concentrations (Kabdasli et al, 2022;Miroslav et al, 2021;Uysal et al, 2014). Regardless of these chemical variances, all struvites are sparingly soluble in water with <3 % of the P water soluble (Jama-Rodzeńska et al, 2022;Wang et al, 2023).…”

“…Struvite fertilisers are made from recovered phosphorus, generally precipitated as magnesium ammonium phosphate (NH 4 MgPO 4 ⋅6H 2 O) from various wastewaters. Struvites with potential agricultural application have been recovered from various P and ammonium containing wastewaters such as semiconductor wastewater (Ryu et al, 2012), phosphogypsum wastewater (Miroslav et al, 2021), yeast industry anaerobic effluent (Uysal et al, 2014), wood based activated carbon wastewater (Wang et al, 2023) and urine (Kabdasli et al, 2022). The chemical properties of recovered struvite can vary depending on the chemical composition of the wastewater, the chemical additives used (e. g. MgSO 4 , MgCl 2 .H 2 O), and the precipitation conditions.…”

The Phosphorus Transport in Groundwater from Phosphogypsum-Based Cemented Paste Backfill in a Phosphate Mine: A Numerical Study

“…The diffusion of pollutants in the groundwater environment has a significant impact on the ecological environment and can even directly affect human life and health. Indeed, researchers in all environmental fields have devoted great attention to this issue and used various methods to assess the diffusion and transport of pollutants in groundwater to protect the groundwater environment and thus human life and health [ 25 , 26 , 27 , 30 , 31 , 32 , 33 , 34 , 35 ]. Zhang et al [ 21 ] studied the spatiotemporal transport and geochemical evolution of heavy metal elements and assessed the human health risk in the contaminated areas of groundwater with heavy metals to provide further insights into the prevention of specific potential negative impacts on human health.…”