α-calcium sulfate hemihydrate with a 3D hierarchical straw-sheaf morphology for use as a remove Pb2+ adsorbent

Glucose microenvironment sensitive degradation of arginine modified calcium sulfate reinforced poly(lactide-co-glycolide) composite scaffolds

“…2(b), XRD patterns of CSH and ArgCSH exhibited the same characteristic peaks at 14.71, 25.61, 29.71, 31.81, and 49.41, which corresponded with the standard peaks of (200), (020), (400), (204), and (424) of calcium sulfate hemihydrate (PDF-ICDD 41-0024) without other crystalline phases or phase transformations. 14 Interestingly, the intensities of the peaks (204), (424), and (% 424) dramatically decreased in ArgCSH. As a result, peaks (200) and (020) became the major peaks of the ArgCSH crystal.…”

Insights into the Role of Na+ on the Transformation of Gypsum into α-Hemihydrate Whiskers in Alcohol–Water Systems

“… 3 − 6 Compared to these traditional ways, the synthesis of α-hemihydrate (α-HH) whiskers from the FGD gypsum precursor is a high-value-added alternative because of the excellent physicochemical properties of α-HH whiskers and promising applications in reinforcing agents, water treatment, water-in-oil emulsion purification, and so forth. 7 − 10 …”

“…Wet flue gas desulfurization (FGD) has proven to be an efficient sulfur dioxide (SO 2 ) emission control method. However, approximately 70–80 million tons of byproduct FGD gypsum is produced annually in China, which demands urgent recycling for the prevention of secondary pollution as well as for the conservation of the natural gypsum minerals. , Traditionally, FGD gypsum was utilized as a road sub-base, cement additive, plaster, or soil ameliorant. − Compared to these traditional ways, the synthesis of α-hemihydrate (α-HH) whiskers from the FGD gypsum precursor is a high-value-added alternative because of the excellent physicochemical properties of α-HH whiskers and promising applications in reinforcing agents, water treatment, water-in-oil emulsion purification, and so forth. − …”

Synthesis of robust insoluble anhydrite whiskers from desulphurization gypsum containing organic matter via improved hydrothermal‐calcination process for the removal of lead and zinc ions

“…17 Based on their excellent properties, II-CaSO 4 whiskers can be added to polymers to improve their mechanical and thermal properties, [18][19][20] in addition to being used as an absorbent in water treatment. 21,22 The methods for synthesizing II-CaSO 4 whiskers include the atmospheric pressure acidification method, 23 one-pot hydrothermal method, 24 stepwise calcination method, 25 and hydrothermalcalcination method. 26 The atmospheric pressure acidification method is conducted in a high concentration of acid solution, where the waste liquor is difficult to deal with and the equipment is easy to corrode.…”

“…The II‐CaSO 4 whisker is one of the high value‐added gypsum products that has the advantages of high strength, stable structure, and large specific surface area 17 . Based on their excellent properties, II‐CaSO 4 whiskers can be added to polymers to improve their mechanical and thermal properties, 18‐20 in addition to being used as an absorbent in water treatment 21,22 . The methods for synthesizing II‐CaSO 4 whiskers include the atmospheric pressure acidification method, 23 one‐pot hydrothermal method, 24 stepwise calcination method, 25 and hydrothermal‐calcination method 26 .…”