abstract = "Recycling phosphogypsum PG for cemented paste backfill CPB has been widely used at phosphate mines in China However the impurities in PG prolong the setting time and reduce the uniaxial compressive strength UCS limiting the engineering application of PG
phosphogypsum contains approximately 3% of potassium phosphate sodium aluminum and ferrum as well as phosphoric acid and salts of heavy metal Today in Russia phosphogypsum is formed at 12 plants [1 4] Annual waste release is equal to more than 10 million tons Phosphogypsum stacks cover large territories of plowing lands facilitating
Reuse of phosphogypsum pretreated with water washing as aggregate for cemented backll Yanan Zhou1 washing PG were determined at a stirring time of 5 min and a solid liquid ratio of 1
If the phosphogypsum utilized is more than hundred thousand tones per year the washing technology is recommended otherwise the technology of neutralizing with quick lime and grinding should be
The phosphate industry is commonly associated with a large amount of waste phosphogypsum in its solid form The vast majority of phosphogypsum is usually discharged into the environment without any treatment and reuse In this work we investigate the valorization of the Moroccan phosphogypsum for manufacturing valuable products such as Ca OH 2 CaCO3
Mineral processing tailings powered rock dust and phosphogypsum PG control the budget of NPs on a global scale and thus affect physical and biogeochemical processes in terrestrial and marine environments Dalmora et al 2016; Lütke et al 2020 and the atmosphere including the nucleation of clouds Retallack 2011 2012; Marshall et al 2016
Phosphogypsum PG is a massive industrial solid waste generated by the wet process of phosphoric acid preparation which typically produces 5 tons of PG for every 1 ton of phosphoric acid produced
The UCS test results showed that 3% phosphogypsum was optimal for uncontaminated soil which was used to treat the contaminated soils An increase in strength was observed in uncontaminated soil with lower phosphogypsum content at all curing periods 3 7 14 and 28 days soil flushing soil washing electro kinetic extraction
Phosphogypsum PG CaSO4·2H2O is a waste product or by product from the production of phosphoric acid the main component in the production of concentrated simple and complex fertilizers The world production of phosphogypsum exceeds 200 million tons per year PG discharged into water bodies seas rivers or disposed of in land dumps may contain
Utilisation of Water Washing Pre Treated Phosphogypsum for Cemented Paste Backfill Yikai Liu 1 Qinli Zhang 1 Qiusong Chen 1 Chongchong Qi 2 Zhu Su 1 and Zhaodong Huang 1 Phosphogypsum PG is the main solid waste from
In general the processing of phosphogypsum by washing and drying gave better performance in all the media View Show abstract Phosphogypsum and vinasse application Soil chemical properties and
to phosp·hogypsum companies that need 200 mL/h of water washing to process 100 g Phosphogypsum PG is an inevitable solid waste produced from the wet process of phosphoric acid Chen et al
The accumulation of original phosphogypsum OPG has occupied considerable land resources which have induced significant environmental problems worldwide The OPG based cemented paste backfill OCPB has been introduced as a promising solution In this study a water washing pre treatment was used
Phosphogypsum PG is an industrial byproduct primarily composed of calcium sulfate dihydrate DH CaSO 4 ·2H 2 O generated from the wet process production of phosphoric acid Currently the
Phosphogypsum PG waste is a by product generated from wet process phosphoric acid H3PO4 manufacturing during phosphate rock decomposition Water washing and neutralization The removal of
Phosphogypsum PG is industrial waste during wet process phosphoric acid with increasing emissions by tens of millions of tons annually Presently the disposal mode of PG stockpiling causes the combined pollution of water soil and air Current impurity removal techniques include water washing acid leaching lime neutralization
abstract = "Recycling phosphogypsum PG for cemented paste backfill CPB has been widely used at phosphate mines in China However the impurities in PG prolong the setting time and reduce the uniaxial compressive strength UCS limiting the engineering application of PG
Phosphogypsum PG is the major by product of the wet phosphoric acid industry Li et al 2023 which is primarily composed of calcium sulfate dihydrate along with some impurities including soluble phosphorus fluorine and heavy metals Ou et al 2023 Approximately 4 5 tons of PG are generated from the production of phosphoric acid per
Chinese cabbage Brassica pekinensis Lour Rupr is rich in many vitamins and many minerals and is an important green vegetable in people s daily diet Soil heavy metal Cd content exceeding safe values has a toxic effect on the growth of vegetables which seriously affects human health Biochar can effectively stabilize heavy metals in polluted soil and
If the phosphogypsum utilized is more than hundred thousand tones per year the washing technology is recommended otherwise the technology of neutralizing with quick lime and grinding should be
The storage of phosphogypsum could bring huge burden to the environment while the traditional method of washing and purifying phosphogypsum produced a large amount of waste water and colossal energy consumption The novel colloidal mechanical method as a new treatment technology of purifying phosphogypsum was benefit for the large scale
The most commonly used pretreatment methods of phosphogypsum are lime water washing or neutralization The water soluble P and F impurities can be converted into insoluble Ca 3 PO 4 2 and CaF 2 to improve the quality of phosphogypsum Chen et al 2019; Singh and Garg 2000 Singh 2002 pretreated phosphogypsum with a citric acid solution
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