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Chemical oxygen demand 1

Coagulation-flocculation mechanism 1

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Secondary coagulation-flocculation process 1

agar 1

flocculant 1

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poly(HEMA) grafted agar 1

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Flocculation behaviors of a novel papermaking sludge-based flocculant in practical printing and dyeing

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-021-1390-x

Abstract:

•PSBF performed better than PAC and PAM in CODCr removals.

Keywords： Practical wastewater treatment Commercial coagulant/flocculant Secondary coagulation-flocculation process

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synthesis of poly(2-hydroxyethylmethacrylate) grafted agar (Ag-g-P(HEMA)) and its application as a flocculant

Gautam SEN, G. Usha RANI, Sumit MISHRA

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 3, Pages 312-321 doi: 10.1007/s11705-013-1344-3

Abstract: Poly(2-hydroxyethylmethacrylate) chains were grafted onto the backbone of agar using a microwave assisted method involving a combination of microwave irradiation and ceric ammonium nitrate to initiate the grafting reaction. The synthesized graft copolymers were characterized by intrinsic viscosity measurements, Fourier transform infrared spectroscopy, elemental analysis (C, H, N, O and S) and scanning electron microscopy. Ag-g-P(HEMA)-2 showed a much higher flocculation efficacy than agar. The optimized dosage of flocculation for Ag-g-P(HEMA)-2 in the wastewater was found to be 0.75 ppm. Compared to agar, Ag-g-P(HEMA)-2 was found to considerably reduce the pollutant load in the wastewater.

Keywords： agar flocculant microwave assisted synthesis jar test protocol poly(HEMA) grafted agar wastewater treatment