Poly l aspartic acid citric acid green copolymers were developed using thermal polymerization of aspartic acid ASP and citric acid CA followed by direct bulk melt condensation technique Antibacterial properties of copolymer of aspartic acid based were investigated as a function of citric acid content This study is focused on the microorganism
Environmental Science Chemistry; Journal of Crystal Growth; View via Publisher The effect of citric acid and 1 2‐dihydroxybenzene 3 5‐disulfonic acid There is a poor understanding of the effect of impurities in phosphate rock on the crystal habit of gypsum during wet process phosphoric acid production The present work studies the
The kinetics of gypsum precipitation the inhibiting effect of citric acid and its use in the differential precipitation of Mg OH 2 from CaSO 4·2H 2
is and the specific surface area of gypsum is 4122 cm2/g the average particle size of gypsum powder is 75 μm Three retarders were used Tartaric acid TA Xilong Scientific Co Ltd sodium tripolyphosphate STPP Xilong Scientific Co Ltd citric acid
Citric acid is used in food pharmaceuticals beverages and agriculture and is a promising value added chemical which can be produced from biomass Dhillon et al 2011; Werpy et al 2004 Most of citric acid production is used as flavor enhancer in food and beverages 70% and the rest is used in buffers as an antioxidant and complexing metals Angumeenal
Pure citric acid is recovered by acidification with sulfuric acid and the resulting gypsum CTG is blue colored due to the absorption of ferric hexacyanoferrate complexes CTG has a purity of % with main components being CaO wt% and SO 3 wt% Table 2 and impurities such as hydrogen sulfide H 2 S and malodorous odors
Alfa Aesar citric acid 99% Alfa Aesar hexamethylenete tramine 99% Alfa Aesar ACS and urea 99% Alfa Aesar ACS A 10 mg/L solution of active telone blue dye was used for photocatalytic degradation For sorption tests the spent machine oil was used Gypsum sample preparation Gypsum was prepared by the structure controlled synthesis
Portland Cement PC has poor resistance against aggressive acidic environment [1] [2] Acid attack is a commonly observed phenomenon in sewer structures and is also referred as biogenic acid attack [3] [4] [5] As a result of acid attack material loss occurs from the surface of a structure leading to section and strength loss [6] A sewer structure is
A greenhouse experiment was conducted to investigate the effect of different soil conditioners gypsum GYP citric acid CA ethylene diamine tetraacetic acid EDTA and polyvinyl
Ettringite based binder from ladle slag and gypsum The effect of citric acid on fresh and hardened state properties H Nguyen P Kinnunen K Gijbels V Carvelli H Sreenivasan AM Kantola Cement and Concrete Research 123 105800 2019
Abstract Plenty of flue gas desulfurization FGD gypsum generated from coal fired power plants for sulfur dioxide sequestration caused many environmental issues Preparing calcium sulfate whisker CSW from FGD gypsum by hydrothermal synthesis is considered to be a promising approach to solve this troublesome problem and utilize calcium sulfate in a high
Collaborative mineralization and simulation study of waste gypsum and CO 2 in citric acid industry HUANG Yan ZHU Zi han ZHOU Zi an SUN Xiao ting DONG Li ming YU Su ping Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry State Environmental Protection Key Lab of Food Chain Pollution
Malic acid has two acid groups and one hydroxyl group Citric acid shows three acid groups and one hydroxyl group In the present pH range 7 the acid functions are ionised since the acid constants are equal to 10 10 and 10 for citric acid 10 and 10 for malic acid [11] The interatomic distances between the
One of the United States Environmental Protection Agency s EPA key tests for assessing the stability of toxic elements in salicylic aspartic and acetic acids Citric acid has shown the highest efficiency in extracting Ca and Al especially from Ca rich plagioclase apparently due to the creation of Al and Ca complexes The dissolution
The industrial byproduct gypsum is a general term for byproducts discharged from industrial production with calcium sulfate as the main ingredient Due to the high number of impurities and production volume the industrial byproduct gypsum is underutilized leading to serious environmental problems At present only desulfurization gypsum and phosphogypsum
DOI / Corpus ID 264452708; Effects of glutaric acid tricarballylic acid and citric acid on the morphology of α hemihydrate gypsum Experimental and DFT simulation studies
Citric acid was a viable substitute to conventional sulphuric acid scrubbing chilled water epsom and gypsum were tested for ammonia recovery from anaerobic digestate in a bench scale stripping scrubbing experimental setup Citric acid was found to give excellent scrubbing performance equivalent to that of sulfuric acid but required double
Gypsum waste classified under code 17 08 02 in the European List of Waste LoW European Commission 2014 is estimated at % of the total CDW Cristobal García et al 2024 In addition there is a growing trend in the demand for gypsum based products which will lead to an increase in gypsum waste in the short and long term
Upon the addition of succinic acid malic acid and L aspartic acid the aspect ratio of α HH crystals decreases and the crystal morphology transitions from a rod like needle structure to a short and stout Malic acid demonstrates the most effective study further demonstrates that the flexural and compressive
Few works studied the gypsum plaster recycling with b hemihydrate This experimental work evaluates the performance of recycled gypsum plaster with citric acid to improve the setting times and workability to building components Recycled gypsum plaster with five admixture contents was used 0%; %; %; % and %
