Synthesis, flocculation and adsorption performance of amphoteric starch

Lin, Qintie; Qian, S.; Li, Congjian; Pan, Hanping; Wu, Ziyang; Liu, Guoguang

doi:10.1016/j.carbpol.2012.05.035

Cited by 70 publications

(44 citation statements)

References 37 publications

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“…CS was prepared by reacting corn starch (Unilever Co. Ltd., China) with cationic monomer, 2,3-epoxypropyl trimethyl ammonium chloride (GTA), using the microwave-assisted method (Lin et al, 2012). The details of the synthesis are as follows: 0.5 g GTA was dissolved in 100 mL of 5.0 g/L NaOH solution with constant stirring for 10 min.…”

Section: Cationic Starch Modified Soilsmentioning

confidence: 99%

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Effect of algal flocculation on dissolved organic matters using cationic starch modified soils

Shi

Pan

2016

Journal of Environmental Sciences

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Modified soils (MSs) are being increasingly used as geo-engineering materials for the sedimentation removal of cyanobacterial blooms. Cationic starch (CS) has been tested as an effective soil modifier, but little is known about its potential impacts on the treated water.This study investigated dissolved organic matters in the bloom water after algal removal using cationic starch modified soils (CS-MSs). Results showed that the dissolved organic carbon (DOC) could be decreased by CS-MS flocculation and the use of higher charge density CS yielded a greater DOC reduction. When CS with the charge density of 0.052, 0.102 and 0.293 meq/g were used, DOC was decreased from 3.4 to 3.0, 2.3 and 1.7 mg/L, respectively.The excitation-emission matrix fluorescence spectroscopy and UV 254 analysis indicated that CS-MS exhibits an ability to remove some soluble organics, which contributed to the DOC reduction. However, the use of low charge density CS posed a potential risk of DOC increase due to the high CS loading for effective algal removal. When CS with the charge density of 0.044 meq/g was used, DOC was increased from 3.4 to 3.9 mg/L. This study suggested, when CS-MS is used for cyanobacterial bloom removal, the content of dissolved organic matters in the treated water can be controlled by optimizing the charge density of CS. For the settled organic matters, other measures (e.g., capping treatments using oxygen loaded materials) should be jointly applied after algal flocculation.

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Section: Cationic Starch Modified Soilsmentioning

confidence: 99%

“…b Determined using one point method (Ahmad et al, 1999). c Determined using element analysis method (Lin et al, 2012). …”

Section: Cationic Starch Modified Soilsmentioning

confidence: 99%

Effect of algal flocculation on dissolved organic matters using cationic starch modified soils

Shi

Pan

2016

Journal of Environmental Sciences

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“…The S-ETAC was rinsed three times with ethanol before dried in an oven at 50 o C. This S-ETAC was pulverized and sieved (600 μm pore size). This method has been reported by Lin et al [6] with slight modifications.…”

Section: Synthesis Of Cationic Starch-based Surfactantmentioning

confidence: 99%

“…where N is the percentage of the nitrogen determined by elemental analysis, the 162.15 is the molar mass of anhydrous glucose units (AGU) in the starch, the molar mass of 151.64 is hydroxypropyltrimethylammonium chloride, 1401 is 100 times the mass of the nitrogen atom, W1 and W2 are the masses of ETAC and starch used [6,7].…”

Section: Degree Of Substitution and Reaction Efficiencymentioning

confidence: 99%

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SYNTHESIS AND PHYSICOCHEMICAL CHARACTERIZATION OF CATIONIC POLYMERIC SURFACTANT FROM Dioscorea pyrifolia STARCH

Suhaimi

Ahmad²,

Lazim³

2016

MJAS

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Cationic starch-based polymeric surfactant, 2-hydroxy-3-(N,N,N-trimethylammonium)propyloxy starch (S-ETAC) from Dioscorea pyrifolia tubers, was synthesized by etherification using 2,3-epoxytrimethylammonium chloride (ETAC) in the mass ratio of ETAC/starch (St) of 0.15:1, 0.25:1, 0.5:1, 1:1, 2:1 g/g and sodium hydroxide as a catalyst in aqueous medium. The degree of substitution (DS) and reaction efficiency (RE) were calculated using the percentage of nitrogen derived from the elemental analysis. The study found that the more the ETAC used, the higher the DS (0:11 to 0.76), but the RE decreased (69% to 35%). This S-ETAC was characterized by using the solubility and swelling power tests as well as attenuated total reflectanceFourier transform infra-red (ATR -FTIR) spectroscopy, differential scanning calorimetry (DSC) and X-ray diffraction (XRD) to prove the reaction occurs at the starch structure.Keywords: cationic starch, etherification, Dioscorea pyrifolia Abstrak Surfaktan polimer berasaskan kanji kationik, kanji 2-hidroksi-3-(N,N,N-trimetilammonium)propiloksi (S-ETAC) dari ubi Dioscorea pyrifolia, telah disintesis melalui tindak balas pengeteran menggunakan 2,3-epoksitrimetilammonium klorida (ETAC) dalam nisbah jisim ETAC/kanji (St) 0.15: 1, 0.25: 1, 0.5: 1, 1: 1, 2: 1 g/g dan natrium hidroksida sebagai pemangkin dalam medium akueus. Darjah penukargantian (DS) dan kecekapan tindak balas (RE) telah dikira menggunakan peratusan nitrogen yang diperolehi daripada penganalisis unsur. Kajian ini mendapati bahawa lebih banyak ETAC yang digunakan, semakin tinggi DS (0.11 kepada 0.76), tetapi RE menurun (69% kepada 35%). S-ETAC dicirikan dengan menggunakan ujian keterlarutan dan kuasa pembengkakkan serta spektroskopi transformasi Fourier inframerah -jumlah pantulan teratenuat (FTIR -ATR), kalorimetri pengimbas pembezaan (DSC) dan pembelauan sinar-X (XRD) untuk membuktikan bahawa tindak balas berlaku pada struktur kanji.

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Preparation of polyacrylamide grafted collagen extracted from leather wastes and their application in kaolin flocculation

Xue

Ding

2014

J of Applied Polymer Sci

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This is probably the first report on the synthesis of a series of novel collagen-based flocculants (CP11, CP12, and CP13) by grafting polyacrylamide (PAM) chains onto the collagen backbone, which was directly extracted from leather shavings via alkali hydrolysis. The results from FTIR, XRD, 1 H NMR, and TGA well supported that PAM chains had been successfully grafted onto collagen backbone. In addition, the micrographs of SEM revealed that the PAM grafted collagen possessed much more porous and looser surface structures in comparison with virgin collagen. Zeta potential measurement showed that the introduction of branched PAM chains helped to improve the positively charge density. Furthermore, CP12 performed the best in the kaolin flocculation with the highest flocculation rate about 24%Ámin 21 and could induce the generation of much larger and denser floccs for the fast settling of kaolin particles. The corresponding flocculation mechanism was also presented by analyzing the collected flocs.

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Synthesis, flocculation and adsorption performance of amphoteric starch

Cited by 70 publications

References 37 publications

Effect of algal flocculation on dissolved organic matters using cationic starch modified soils

Effect of algal flocculation on dissolved organic matters using cationic starch modified soils

SYNTHESIS AND PHYSICOCHEMICAL CHARACTERIZATION OF CATIONIC POLYMERIC SURFACTANT FROM Dioscorea pyrifolia STARCH

Preparation of polyacrylamide grafted collagen extracted from leather wastes and their application in kaolin flocculation

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