The citric acid (CA) is an organic acid with a global market value of USD 3.6 billion. Due to its non-toxic and biodegradable nature, it is widely used in the food industry and various other industries such as pharmaceutical, biomedical, textile, and leather industries. ... is the most traditionally used one but it generates a large amount of ...
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DOI: 10.1016/j.jiec.2023.10.037 Corpus ID: 264452708; Effects of glutaric acid, tricarballylic acid and citric acid on the morphology of α-hemihydrate gypsum: Experimental and DFT simulation studies
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An aspect ratio (AR) close to 1 is essential to improve the quality and performance of α-HH gypsum. To solve this problem, the morphological modification of α-HH gypsum by modifiers such as glutaric acid (GA), tricarballylic acid …
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School of Metallurgy and Environment, Central South University, Changsha 410083, China; 2. Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, ... From the SEM examination, citric acid and gypsum treatments contributed to the reduction in IEP and redistribution of —OH groups on particle surfaces ...
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This study summarized industrial by-product gypsum into eight types (flue gas desulphurization gypsum (FGDG), phosphogypsum (PG), titanium gypsum (TG), salt gypsum (SG), fluorgypsum (FG), nitro gypsum (NG), citric acid gypsum (CAG) and borogypsum (BG)). Subsequently, the chemical, physical properties and annual productivity associated with ...
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The main effect of citric acid is to hinder the growth of gypsum, by binding onto gypsum crystal faces [25]. Citric acid binding depends on the crystalline faces, which results in the same time in ...
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The liquid citric acid stream branches into a complex range of processes that reconnect, interconnect and influence one another at different stages. In the course of the separation, purification, crystallization, and drying processes, we produce potassium calcium salt, citrates, vinasse and gypsum materials.
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This study aims to obtain insights into the retardation mechanism of citric acid in an ettringite-based binder from ladle slag and gypsum. The hydration kinetics and phase assemblage of the binder ...
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Titanium gypsum (TG) is a light alkaline waste residue produced by adding limestone or calcium carbide slag to treat acidic wastewater during the production of titanium dioxide (TiO 2) from ilmenite (FeTiO 3) using the sulphuric acid method [1].The main ingredient of TG is calcium sulfate dihydrate (CaSO 4 ·2H 2 O), which contains a large amount of …
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Citric acid monomer with presence of three active functional groups present overs its molecule can readily react with amines to form amides even in absence of any catalyst [17]. The mixture of aspartic and citric acid was thoroughly mixed and finely powdered using pestle and mortar before transferring it into a crucible bowl (Ceramic) [17 ...
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Effects of citric acid on crystalline habit and crystal morphology of gypsum dihydrate were analyzed in great detail. The retarding mechanism of citric acid was also discussed from the standpoint of crystal growth by use of Scanning Electric Microscope and X-ray Photo Technology. The results shows that due to the complexion between citric acid and Ca2+, the initial …
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We go way back. To 1919, to be exact. Upon the solid foundation of the past, we build for the future as a trusted citric acid producer, mycelium supplier, and manufacturer of trisodium citrate and monosodium citrate. We balance …
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With the improvement of living standards, people's requirements for living environment are getting higher and higher. ... Fig. 4 (b) and (c) show that the gypsum crystals with citric acid are changed from the original needle-like to the short column and plate-like, and the size of crystals becomes smaller obviously, some crystals almost become ...
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Ultimately, the choice between phosphoric acid and citric acid depends on the specific application, safety requirements, and environmental considerations. For industrial and heavy-duty uses, phosphoric acid is often preferred, while citric acid remains the acid of choice for food, beverage, and applications.
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Desulfurized building gypsum (DBG) has great application potential and can be used to produce lightweight plastering gypsum (LPG). In this work, DBG was modified by …
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Environmental impacts of citric acid production in three scenarios are assessed using the life cycle assessment approach. Citric acid production with ion exchange recovery method is the most environment-friendly scenario. ... When 80% flue gas desulfurization gypsum and phosphogypsum (weight of magnesium oxide) were incorporated into MOCP, the ...
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Construction is among the most energy-consuming human activities, and energy is a problem on a finite planet. There is a search for new technologies that bring improvements and solutions in the optimization of low energy incorporated materials and
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Regulating the phase structure of Cr(VI)-host minerals could be considered as an effective approach to separate Cr(VI) from the minerals. For example, Liu et al. used hydrothermal mineralization to modulate the phase transition from CaSO 4 ·2 H 2 O to CaSO 4 in gypsum slag, resulting in a significant difference in the adsorption properties of Cr(VI) and SO 4 2-on …
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The invention belongs to the technical field of mortar, and particularly relates to light plastering citric acid gypsum mortar. A light plastering citric acid gypsum mortar is prepared by mixing citric acid gypsum powder, heavy calcium carbonate powder, river sand and vitrified micro-beads as an aggregate; the light plastering citric acid gypsum mortar is prepared by mixing the redispersible ...
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The method of utilizing citric acid industrial waste residue to produce gypsum series product of the present invention, it is characterized in that this method comprises following process...
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The retardant effects of citric acid on the properties of ettringite binders are not yet fully understood. This investigation provides insights into the effects of citric acid on both the fresh and hardened state properties of the binder produced from …
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The simulations show that only in an alkaline environment is the crystal morphology of gypsum changed by retardation agents. The simulations provide a detailed description of retardation, for example, the specific mechanisms by which tartaric and citric acid retard setting of gypsum and how they differ. At high pH meso, D(-), and L(+) tartaric ...
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Plaster or gypsum (CaSO4·2H2O) is obtained from a suspension of β calcium hemihydrate (CaSO4·1/2H2O). The effect of two additives, known to retard setting, namely citric and malic acids, on the electrical conductivity and on the acoustic emission (AE) has been studied. This work presents the correlation obtained between these two techniques and their …
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The comprehension of the mechanisms of nucleation and growth that regulate the gypsum (calcium sulfate dihydrate) precipitation is fundamental to prevent scaling problems. The present paper reports measurements of the induction period for gypsum nucleation when citric acid is added in solution as an additive to retard scale formation. The supersaturation ratio was varied …
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Industrial soil is susceptible to acid or alkali pollution, but studies focused on the remediation of such soil are still limited. This manuscript investigated the neutralization effect of five agents (hydrochloric acid, citric acid, ferrous sulfate, calcium superphosphate and raw gypsum) to alkali polluted soil. The results showed that regarding the initial pH after the …
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Effects of citric acid on crystalline habit and crystal morphology of gypsum dihydrate were analyzed in great detail. The retarding mechanism of citric acid was also discussed from …
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The cycle of citric acid production with the formation of gypsum-containing waste was considered and options for processing and utilization of citrogypsum were proposed.
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This investigation provides insights into the effects of citric acid on both the fresh and hardened state properties of the binder produced from the hydration between ladle slag and …
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Attack of sulfuric acid and citric acid on PC and CSA-based binders was evaluated with respect to mass loss, dimensional change, cumulative H⁺ ion neutralisation, strength loss, and changes in ...
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Citric acid can be used to retard the ettringite-forming reaction between Al-rich phases and gypsum. As reported in [3], citric acid added at 0.5 wt% to the mortar prolonged the initial setting time along with the presence of gypsum.In addition, in [2], the concentration of citric acid solution was 0.8 wt% in order to obtain an initial setting time of around 1 h.
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