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2014•Advanced materials researchOpen access

New Seawater Flocculants

Jian An Hao, Bo Yang, Xiao Qing Zhang, Ai Jun Zhang, Tian Xiang Jiang, Xiu Zhi Zhang, Jing Wang, Yu Shan Zhang

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Abstract

This paper introduces new seawater flocculants. Ferric sulfate solution and polysilicic acid were mixed. After standing and curing, polymeric ferric silicate sulfate was obtained. The optimum preparation process was explored. When Fe/Si=10:20, curing pH in the range of 1.0 to 3.0, flocculants had best flocculating activity. The polymeric ferric silicate sulfate solution and 200 μg/L chitosan solution were mixed to make composite flocculants. Flocculating activity assessments were studied. When pH in the range of 6.0 to 10.0, temperature in the range of 10 °Cto 40 °C, flocculating activity could be stable. Total phosphorus (TP) and total organic carbon (TOC) removal rates of new flocculants were higher than 80% while algae and bacteria removal rates of new flocculants were all higher than 90%. These flocculants were multi-effect seawater flocculants.

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What this paper is about

This paper introduces new seawater flocculants. Ferric sulfate solution and polysilicic acid were mixed. After standing and curing, polymeric ferric silicate sulfate was obtained. The optimum preparation process was explored. When Fe/Si=10:20, curing pH in the range of 1.0 to 3.0, flocculants had best flocculating activity. The polymeric ferric silicate sulfate solution and 200 μg/L chitosan solution were mixed to make composite flocculants. Flocculating activity assessments were studied. When pH in the range of 6.0 to 10.0, temperature in the range of 10 °Cto 40 °C, flocculating activity could be stable. Total phosphorus (TP) and total organic carbon (TOC) removal rates of new flocculants were higher than 80% while algae and bacteria removal rates of new flocculants were all higher than 90%. These flocculants were multi-effect seawater flocculants.

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Available abstract

This paper introduces new seawater flocculants. Ferric sulfate solution and polysilicic acid were mixed. After standing and curing, polymeric ferric silicate sulfate was obtained. The optimum preparation process was explored. When Fe/Si=10:20, curing pH in the range of 1.0 to 3.0, flocculants had best flocculating activity. The polymeric ferric silicate sulfate solution and 200 μg/L chitosan solution were mixed to make composite flocculants. Flocculating activity assessments were studied. When pH in the range of 6.0 to 10.0, temperature in the range of 10 °Cto 40 °C, flocculating activity could be stable. Total phosphorus (TP) and total organic carbon (TOC) removal rates of new flocculants were higher than 80% while algae and bacteria removal rates of new flocculants were all higher than 90%. These flocculants were multi-effect seawater flocculants.

Key concepts: Flocculation, Sulfate, Seawater, Ferric, Chemistry, Silicate, Chemical engineering, Pulp and paper industry

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