Study and Application of a Novel Tap Water Flocculant

Defang  Zeng; Yong  Zhai; Shuisheng  Zhang; Fujun  Ding

doi:10.4236/jep.2012.36062

Defang Zeng, Yong Zhai^*, Shuisheng Zhang, Fujun Ding

Abstract: By using polyaluminum chloride (PAC), chitosan (CTS) and montmorillonite (MM) as the main raw materials, a novel tap water flocculant had been prepared. The optimal mass proportion of this flocculant was 1 g·L^–1 chitosan:50 g·L^–1 PAC:3g·L^–1 MM = 30:11:7. Compared with the traditional polyaluminum chloride (PAC), the concentration of aluminum ion (Al³⁺) and suspended solids (SS) in the exit dropped 66.19% and 5.80% respectively, moreover, the cost was decreased by 9.95%. This flocculant was not only cheaper, but also provided improved flocculating function compared with traditional flocculant. The concentration of Al3+ in exit water was decreased greatly so the drinking water would be much safer.

Keywords: Water Treatment; Composite Flocculant; Flocculant; Aluminum Ion

Cite this paper: D. Zeng, Y. Zhai, S. Zhang and F. Ding, "Study and Application of a Novel Tap Water Flocculant," Journal of Environmental Protection, Vol. 3 No. 6, 2012, pp. 518-522. doi: 10.4236/jep.2012.36062.

References

[1] M. Y. Liu, X. M. Hu, X. J. Zhang and Y. B. Su, “Polymeric Aluminum-Calcium Chloride: A New Flocculant and Its Preparation and Preliminary Application,” Journal of Northeastern University, Vol. 26, No. 5, 2005, pp. 500-503.

[2] P. T. Srinivasan, T. Viraraghavan, B. Kardash and J. Bergman, “Aluminum Speciation during Drinking Water Treatment,” Water Quality Research Journal of Canada, Vol. 33, No. 3, 1998, pp. 377-388.

[3] M. I. Sadawi and R. H. Ismail, “Factors Affecting the Residual Aluminum in Potable Water and Quality Assurance,” Journal of Engineering and Applied Science, Vol. 51, No. 3, 2004, pp. 447-462.

[4] R. D. Letterman and C. T. Driscoll, “Survey of Residual Aluminum in Filtered Water,” American Water Works Association, Vol. 80, No. 4, 1988, pp. 154-158.

[5] S. Vigneswaran, D. S. Chaudhary, H. H. Ngo, W. G. Shim and H. Moon, “Application of A PAC-Membrane Hybrid System for Removal of Organics from Secondary Sewage Effluent: Experiments and Modeling,” Separation Science and Technology, Vol. 38, No. 10, 2003, pp. 2183-2199. doi:10.1081/SS-120021619

[6] T. Maria, M. Sylwia and A. W. Morawski, “Removal of Organic Matter by Coagulation Enhanced with Adsorption on PAC,” Desalination, Vol. 161, No. 1, 2004, pp. 79-87. doi:10.1016/S0011-9164(04)90042-2

[7] S. K. Dentel and J. M. Gossett, “Mechanisms of Coagulation with Aluminum Salts,” American Water Works Association, Vol. 80, No. 4, 1988, pp. 187-198.

[8] D. Zeng, J. Wu and J. F. Kennedy, “Application of a Chitosan Flocculant to Water Treatment,” Carbohydrate Polymers, Vol. 71, No. 1, 2008, pp. 135-139. doi:10.1016/j.carbpol.2007.07.039

[9] Q. W. Deng, J. W. Wang and L. V. Jinsong, “Adsorption of Cadmium by Magnetic Chitosan Microspheres,” 2011 International Conference on Electrical and Control Engineering, Yichang, 16-18 September 2011, pp. 3335-3338.

[10] P. Miretzky and C. A. Fernandez, “Hg(II) Removal from Water by Chitosan and Chitosan Derivatives: A Review,” Journal of Hazardous Materials, Vol. 167, No. 1-3, 2009, pp. 10-23. doi:10.1016/j.jhazmat.2009.01.060

[11] M. Zhang, C. Y. Tan, L. Kong and L. C. Jin, “Preparation of a Novel Chitosan Derivative and Use in Water Treatment,” 2011 International Conference on Multimedia Technology, Hangzhou, 26-28 July 2011, pp. 1160-1162. doi:10.1109/ICMT.2011.6002962

[12] H. Yang, B. Yuan, Y. B. Lu and R. S. Cheng, “Preparation of Magnetic Chitosan Microspheres and Its Applications in Wastewater Treatment,” Science in China, Series B: Chemistry, Vol. 52, No. 3, 2009, pp. 249-256. doi:10.1007/s11426-008-0109-1

[13] Y. L. Tang, J. C. Chen and D. F. Zeng, “Study on the Flocculation Mechanism of Modified Rectorite/Chitosan Composite Flocculant,” Journal of Chemical Industry and Engineering, Vol. 28, No. 3, 2007, pp. 11-14.

[14] D. S. Wang and X. H. Tang, “Quantitative Model of Coagulation with Inorganic Polymer Flocculant PAC: Application of the PCNM,” Journal of Environmental Engineering, Vol. 32, No. 5, 2006, pp. 434-441. doi:10.1061/(ASCE)0733-9372(2006)132:5(434)

[15] J. K. Edzwald, “Coagulation in Drinking Water Treatment: Particles, Organics and Coagulants,” Water Science and Technology, Vol. 27, No. 11, 1993, pp. 21-35.