Phosphogypsum Emissions In My Country
The sponge effect of phosphogypsum-based cemented …
Conversely, aside from the substantial greenhouse gas emissions from the PC calcination process, cement-related materials are significant CO 2 sinks due to their ability to react with atmospheric CO 2 [[58], [27]]. This sponge effect mainly benefits from the carbonation of the calcium-containing phases, such as portlandite and calcium silicate hydrates [[63], [56]].
Preparation of gypsum with high purity and whiteness from phosphogypsum …
Phosphogypsum (PG) is a hazardous industrial solid waste product from the wet phosphate industry 1,2.The widespread deposition of that fine, light- to dark-grey, powder with a slight odor and ...
An efficient methodology for utilization of K-feldspar and
Herein, we propose a novel methodology via coupling the extraction soluble potassium salts from K-feldspar, reduction of phosphogypsum for recovery of sulfur dioxide, and reduction of CO 2 emissions using the formed calcium compounds. Phosphogypsum in this process could be reduced with C to SO 2 and the formed CaO could facilitate the ion …
A review on the environmental impact of phosphogypsum …
Here we provide an overview and evaluation of the geochemical and radiological hazardous risks associated with the different uses of PG. In this review, we show that NPs are important …
Valorization of phosphogypsum in Supersulfated Cement …
Phosphogypsum is a by-product from the production of phosphoric acid. In this process, the raw phosphate is treated by sulfuric acid and, besides the main product which is phosphoric acid (H3PO4), gypsum and a small quantity of hydrofluoric acid are obtained. For every tonne of phosphoric acid made, about three tonnes of phosphogypsum (calcium sulfate dehydrate) are …
Effects of phosphogypsum and superphosphate on …
The addition of phosphogypsum and superphosphate drastically reduced CH4 emissions (by 85.8% and 80.5%, respectively) and decreased NH3 emissions (by 23.5% and 18.9%, respectively).
Phosphogypsum: Sustainable Management and Use
Phosphogypsum: Sustainable Management and Use. This report is addressing rapidly changing scientific, regulatory and policy perspectives concerning phosphogypsum …
Effects of dicyandiamide, phosphogypsum and …
This study investigated the effects of dicyandiamide, phosphogypsum and superphosphate on greenhouse gas emissions and compost maturity during pig manure composting.
Plant-level intensity of energy and CO2 emissions for …
Comparison of (a) decarboxylation-derived CO 2 emissions factor, (b) energy-derived CO 2 emissions factor, and (c) CO 2 emissions factor for cement at plant-level in Guizhou from 2019 to 2022 ...
Impact of High Rates of Phosphogypsum on Radon Emissions …
Impact of High Rates of Phosphogypsum on Radon Emissions and on Radioactivity and Heavy Metals in Soils Groundwater and Bahiagrass Forage. 05-038-141Final. Perspective. The Florida Institute of Phosphate Research, through its "Strategic Research Priorities," currently is stressing six program areas, three that are technology oriented and ...
Investigating effects of phosphogypsum disposal practices …
We propose a comprehensive approach based on emergy analysis and carbon emission accounting to compare the impacts of different phosphogypsum disposal schemes …
Effects of dicyandiamide, phosphogypsum and …
Adding dicyandiamide alone reduced the emissions of ammonia (NH 3), methane ... The combination of dicyandiamide and phosphogypsum exhibited the most pronounced emission reduction effect, simultaneously decreasing the NH 3, CH 4 and N 2 O emissions by 18.28 %, 38.58 % and 36.14 %, respectively. The temperature and C/N content of the compost ...
Performance of phosphogypsum and calcium magnesium phosphate …
According to the same mechanism, phosphogypsum can effectively reduce NH 3 and CH 4 emissions during composting, and the SO 4 2− component of phosphogypsum provides an additional effect for ...
CO₂ emissions
We can compare each country's total contribution to global emissions by looking at cumulative CO 2. We can calculate cumulative emissions by adding up each country's annual CO 2 emissions over time. We did this calculation for each region and the largest CO 2 emitters over the period from 1751 through to 2017. 3
Utilization of phosphogypsum and phosphate in improving …
MOC samples with phosphogypsum and KH 2 PO 4 exhibit lower cost and carbon emissions than pure MOC samples. ... Phosphogypsum (PG) is a byproduct in the productive process of the phosphoric acid and phosphate fertilizer industry [1]. Around 5 tons of PG will be accumulated for each ton of phosphoric acid produced by industrial wet process.
Effects of Dicyandiamide, Phosphogypsum, and …
The addition of phosphogypsum and superphosphate drastically reduced CH4 emissions (by 85.8% and 80.5%, respectively) and decreased NH3 emissions (by 23.5% and 18.9%, respectively).
Study on the Phosphogypsum Proportion in ed …
as well as the carbon dioxide emissions with the increasing phosphogypsum content in concrete, different trends were found. As the strength and emissions vary, a suggested range of content for ... accounting for more than 14% of the country's total carbon dioxide emissions [4]. For comparison, the global cement production and CO 2
Phosphogypsum in Agriculture: A Review
Phosphogypsum is the term used for the gypsum by-product of wet-acid production of phosphoric acid from rock phosphate. It is essentially hydrated CaSO 4, with small proportions of P, F, Si, Fe, Al, several minor elements, heavy metals, and radionuclides as impurities.Phosphogypsum appears to be good source of S and Ca for crops.
Phosphogypsum: potential uses and problems – a …
Phosphogypsum (PG: CaSO 4 ·2H 2 O) is a waste product generated by the phosphate industry. World production of this waste exceeds 200 million tonnes per year.
Effects of phosphogypsum and superphosphate on …
Phosphogypsum and superphosphate had no negative effects on compost maturity, although superphosphate inhibited the temperature rise in the first few days. The addition of phosphogypsum and superphosphate drastically reduced CH{sub 4} emissions (by 85.8% and 80.5%, respectively) and decreased NH{sub 3} emissions (by 23.5% and 18.9%, …
Rare Earth Luminescence in Phosphogypsum Waste …
literature data, Sm3+ and Ce3+ emissions in the phosphogypsum were identified. Sm3+ lines were obtained at 567 nm and 602 nm after a selective excitation at the 4G 5/2-6H 7/2
Effects and microbial mechanisms of phosphogypsum and …
The degradation of organic matter (OM) and CH 4 emissions during composting greatly influence the composting efficiency and greenhouse effect. This study evaluated the effects of adding phosphogypsum (PPG) and medical stone (MS) on OM breakdown, CH 4 emissions, and their underlying mechanisms. MS accelerated the breakdown of OM in the …
A review on the environmental impact of phosphogypsum …
The highest number of PG stacks occur in Florida, China and Northern Africa (specially Morrocco), but PG piles can be also found in many countries around the world. The …
Phosphogypsum | Encyclopedia MDPI
Overview of Studies on the Environmental Impact of Phosphogypsum Accumulation and Storage. ... A.M.; de la Rosa, J.D. Hydrogen fluoride concentrations in ambient air of an urban area based on the emissions of a major phosphogypsum deposit (SW, Europe). Sci. Total Environ. 2020, 714, 136891.
Altmetric – [Impact of Phosphogypsum Wastes on the …
Phosphogypsum is a phosphorus chemical waste which has not been managed and reused well, resultantly, causing environmental pollution and land-occupation. Phosphogypsum wastes were used as a soil amendment to assess the effect on wheat growth, yield and CO2 emissions from winter wheat fields.
Phosphogypsum | US EPA
Phosphogypsum is a solid waste byproduct from processing phosphate ore to make phosphoric acid that is later used in fertilizer. The phosphate ore and the resulting phosphogypsum contain radium, which decays to form radon gas. Both radium and radon are …
Phosphogypsum in the Circular Economy
• ^Phosphogypsum is a radioactive waste product _ • ^EPA requires that phosphogypsum be managed in above-ground stacks, which are designed to keep emissions of radon and other …
The Effect of Phosphogypsum on Greenhouse Gas …
Phosphogypsum (PG), a by-product of the phosphate fertilizer in- out the PG addition. This was attributed to a decrease dustry, reduces N losses whenadded to compostinglivestock manure, in compost pH.
Application of phosphogypsum in soilization: a review
Phosphogypsum is the most significant industrial solid waste in the world. Phosphogypsum has a complex composition and its traditional storage methods occupy large areas of land and also damage the environment. Currently, phosphogypsum is mainly used for the direct preparation of construction materials and chemical auxiliary materials, but the amount of …