Study on performance and application of the polysilicate ferric chloride used as flocculant for seawater desalination pretreatment

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  • Tianjin University of the Science and Technology, Tianjin 300222, China

Received date: 2005-09-15

  Revised date: 2005-09-15

  Online published: 2010-10-01

Abstract

The polysilicate ferric chlori de (PFSC)used as flocculant for seawater desalination pretreatment is prepared with pickle liquor and sodium silicate. By investigating the effect of molar ratio of Fe/Si, aging time and agingtemperature on the turbidity removal of seawater, the results showthat when the molar ratio of Fe/Si is 1.5, the value of pH is 0.5, the aging time is 1.5 h and the aging temperature is 40 ℃, the PFSC product has a wider pH range, rapid floccule forming, bulkyand massive floccules and easytodeposit. Based on the research on the seawater pretreatment for the Bohai Sea, it is found that the PFSC has a strong ability to decrease turbidity when the pH value is within 5 to 9 and it is better than PFS and FeCl3 in the market, especially at lowdosage.

Cite this article

Yi Shouzhi, Duan Yingbo, Zhang Lihong . Study on performance and application of the polysilicate ferric chloride used as flocculant for seawater desalination pretreatment[J]. Industrial Water Treatment, 2006 , 26(1) : 17 -20 . DOI: 10.11894/1005-829x.2006年.26(01).17

References

[1] 王世昌. 人类需要海水淡化技术[J]. 国际学术动态, 1997(1):13-14.
[2] Siavash Madaeni Sayed, Mohamamdi Toraj, Kazemi Moghadam. Chemical cleaning of reverse osmosis membranes[J]. Desalination, 2001, 134(1-3): 77-82.
[3] 苏保卫, 王越, 王志, 等. 海水淡化的膜预处理技术研究进展[J]. 中国给水排水, 2003, 19(8) : 30-32.
[4] 栾兆坤. 聚硅酸金属盐絮凝剂的制备和絮凝性能[J]. 环境化学, 1997, 16(6): 535-541.
[5] 俞敦义, 顾本可, 朱波. 由酸洗废液制取新型混凝剂[J]. 水处理 技术, 1996, 22(4) : 233-236.
[6] 席美云, 郭榕. 聚硅酸硫酸铁絮凝剂的制备及应用[J]. 环境科学 与技术, 2000(3) : 12-14.
[7] 林斯清. 海水和苦咸水淡化[J]. 水处理技术, 2001, 27(1) : 57-62.
[8] 胡翔, 周定. 聚硅酸铁处理低温低浊水的研究[J]. 工业水处理, 1997, 17(5): 13-14.
[9] 孙向东, 王云详, 常同胜. 聚硅酸铁的合成及性能研究[J]. 工业 水处理, 2001, 21(1) : 20-21.
[10] 朱文亭. 海水浊度特性和混凝机理的探讨[J]. 城市环境与城市 生态, 1993, 6(4) : 7-10.

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