Application of Polyaluminum Chloride-Polyacrylamide as New Water Treatment Material for the Removal of Natural Organic Matter

Shuang Zhao; Dan Li; Wei Hua Yang; Zhang Jian Zou

doi:10.4028/www.scientific.net/MSF.1003.109

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HomeMaterials Science ForumMaterials Science Forum Vol. 1003Application of Polyaluminum...

Application of Polyaluminum Chloride-Polyacrylamide as New Water Treatment Material for the Removal of Natural Organic Matter

Abstract:

Natural organic matter (NOM) is easily soluble in surface water and difficult to be removed thoroughly. In this paper, polyaluminum chloride-polyacrylamide (PAC-PAM), as a new water treatment material, was proposed to solve this problem by coagulation treatment. The performance, mechanism and kinetic process of NOM removal were investigated systematically. Results showed that the optimum dosage of PAC and PAM was 10 mg/L and 0.5 mg/L for NOM removal of Yellow River water. In this condition, NOM could be removed effectively due to positively charged PAM addition. The size, growth rate and recovery factor of flocs generated by PAC-PAM reached 419 μm, 34.9 μm/min and 0.48, respectively, while only 355 μm, 27.9 μm/min and 0.31 were obtained by PAC. Moreover, the adsorption and bridging effect of PAM assisted the formation of multi-branched flocs, which brought fast settle velocity and low turbidity of supernatant after coagulation.

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Periodical:

Materials Science Forum (Volume 1003)

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109-114

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.1003.109

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Online since:

July 2020

Authors:

Shuang Zhao*, Dan Li, Wei Hua Yang, Zhang Jian Zou

Keywords:

Coagulation Kinetics, Coagulation Mechanism, Composite Flocculants, Natural Organic Matter, PAC-PAM

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