Synthesized cationic starch grafted tannin as a novel flocculant for efficient microalgae harvesting

You, Yaohui; Liu, Yang; Sun, Xubing; Chen, Hong; Wang, Heng; Wang, Nanqiu; Li, Siqin

doi:10.1016/j.jclepro.2022.131042

Cited by 29 publications

(5 citation statements)

References 46 publications

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“…As shown, two diffraction peaks existed near 18 o and 23 o registered for cassava starch. Similar observations on cassava starch diffraction peaks have been reported by You et al 27) .…”

Section: Scanningielectronimicroscopy (Sem)supporting

confidence: 90%

“…To some extent, reducing the -OH group inhibits intra and intermolecular hydrogen bonding 28) . Similar observations on the XRD trend of the grafting product have been reported by You et al 27) and Alharbi et al 16) . This indicates that cassava starch transformed into an amorphous substance, thereby proving the success of polyacrylamide grafting on the cassava starch backbone.…”

Section: Scanningielectronimicroscopy (Sem)supporting

confidence: 89%

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Microwave-assisted Method for Synthesis of Cassava Starch-Grafted Polyacrylamide Hydrogel: Initiator and Irradiation Power Variation

Maudy Pratiwi Novia Matovanni,

Distantina,

Kaavessina

et al. 2023

Evergreen

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This study aimed to synthesize cassavaistarch-grafted polyacrylamide hydrogel (iCSg-PAMi) by the microwave-assisted method based on cassavaistarch as the backbone, acrylamide as the monomer, and potassium peroxodisulfate (KPS) as the initiator. In this paper, the effect of KPS amount as initiator and microwave irradiation power was investigated on the obtained hydrogel properties as a candidate for enhanced oil recovery (EOR) application. Fourier-transformiinfraredi (FTIR), scanningielectron microscopyi(SEM), X-rayi powderi diffractioni (XRD), and thermogravimetricianalysisi(TGA) were used to investigate the effective grafting of polyacrylamide chains onto the backbone of icassava starch. Results show that the preparation of CS-g-PAMi with 0.3 g of KPS and 700 W of irradiation power resulted in the best performance, which was 602.66% of grafting percentage and 81.72% of water solubility. Its viscosity also exceeded 96% after 15 days of aging.

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“…As shown, two diffraction peaks existed near 18 o and 23 o registered for cassava starch. Similar observations on cassava starch diffraction peaks have been reported by You et al 27) .…”

Section: Scanningielectronimicroscopy (Sem)supporting

confidence: 90%

Section: Scanningielectronimicroscopy (Sem)supporting

confidence: 89%

Microwave-assisted Method for Synthesis of Cassava Starch-Grafted Polyacrylamide Hydrogel: Initiator and Irradiation Power Variation

Maudy Pratiwi Novia Matovanni,

Distantina,

Kaavessina

et al. 2023

Evergreen

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“…55 Figure 2d shows the 1 H NMR of St-g-PDMC-PAM-PAC, the peaks at 3.3-4.0 ppm and 5.25 ppm were characteristic peak of glucose in starch. 56 In this work, the peaks at 6.0 and 1.8 ppm were assigned to NH 2 and CH 2 of PAM, and the peaks at 3.1, 3.3 and 4.5 ppm belonged to the CH 3 , CH 2 of PDMC, 57,58,59 which also indicated the PAM and PDMC were successfully grafted on starch.…”

Section: Nmr Analysissupporting

confidence: 49%

Synthesis of starch‐based flocculant by multi‐component grafting copolymerization and its application in oily wastewater treatment

Liu

Guo

Ren

et al. 2022

J of Applied Polymer Sci

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The grafting copolymerization of methacryloxyethyl trimethyl ammonium chloride (DMC), acrylamide (AM) and polyaluminum chloride (PAC) on starch was initiated by KMnO 4 , HIO 4 and H 2 SO 4 composite system. The modification of starch was combined its best attributes with those of inorganic and organic polymers and therefore enhanced the flocculation effect when it was used as flocculants by increasing the charge neutralization, adsorption bridging and aggregation ability. The main influence factors on oil removal ratio were investigated through orthogonal experimental design, and the optimal preparation conditions were obtained. The grafted copolymer was characterized through a series of physicochemical techniques (i.e., SEC-MALS, 13 C MAS NMR, 27 Al NMR, FTIR, SEM, and TGA and XRD), which indicated the PAC, PAM and PDMC were successfully grafted on the starch.

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“…For CS, the DS is defined as the average number of hydroxyl groups in each anhydroglucoside unit (AGU) substituted by quaternary ammonium groups. 35 The DS was calculated as: 36 where 162.15 is the molecular weight of the AGU, 151.5 is the MW of the cationic substituent, N % refers to the content of total nitrogen in a CS sample and it was determined in five replicates per sample using a TNT plus 826 test kit (Hach Method 10208) 37 with a standard deviation <0.5%.…”

Section: Methodsmentioning

confidence: 99%

Section: Flocculant Preparationmentioning

confidence: 99%

Flocculation of livestock wastewater using cationic starch prepared from potato peels

Haleem

Osabutey

Albert

et al. 2023

Environ. Sci.: Water Res. Technol.

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Synthesized cationic starch grafted tannin as a novel flocculant for efficient microalgae harvesting

Cited by 29 publications

References 46 publications

Microwave-assisted Method for Synthesis of Cassava Starch-Grafted Polyacrylamide Hydrogel: Initiator and Irradiation Power Variation

Microwave-assisted Method for Synthesis of Cassava Starch-Grafted Polyacrylamide Hydrogel: Initiator and Irradiation Power Variation

Synthesis of starch‐based flocculant by multi‐component grafting copolymerization and its application in oily wastewater treatment

Flocculation of livestock wastewater using cationic starch prepared from potato peels

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