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Flocculation is one of the most important steps in water processing,because it affects the performance of following flows,the treated water quality and the cost.So it has becoming the most important field of application in environmental engineering.The urgent task is to research and develop a new-type inorganic macromolecular flocculants of high-efficient, nonpoisonous and low-price,and this is an important subject being paid most attention in the worldwide water treatment an present.In this article,at the same time introducing polysilicate in iron,zinc,aluminium three metal ions,good control of process conditions,and include boron as a stabilizing agent,the development of new types of water treatment chemicals-boron-containing iron and zinc-aluminum（PSFZBA）.PSFZBA Preparation:preparation of a certain concentration of sodium silicate solution polymerization in acidic conditions after a period of time by adding ferric sulfate,zinc sulfate and aluminum sulfate,static aging 24 hours,the reaction to the effective degree of polymerization.PSFZBA in the preparation process,the inspection of the solution pH,sodium concentration,Fe3+、Zn2+、Al3+ concentration,the dosage of PSFZBA performance of flocculation,PSFZBA be the best formula and Preparation of conditions: Silicate polymerization time of 45 min,sodium concentration of 0.5 mol/L,sodium silicate solution pH of 3.5,Fe/Si mole ratio=1:2,Fe/Zn ratio=1:8,Fe/Al Moore=1:4,Fe/B ratio =5:4,as a way of increasing aging time to 24 hours.By comparison PSFZBA and polysilicic acid sulfate（PFSS）,poly acid zinc sulfate（PZSS）, the Pharmacy flocculation effect,bleaching effect and PSFZBA simulated wastewater treatment experiment,except that the cloud PSFZBA,bleaching and performance are superior to PFSS PZSS,is a highly efficient new flocculantThis article also PSFZBA role mechanism was discussed,the results show that not only has PSFZBA bridge and electrostatic adsorption and in the role,while also playing iron,zinc, aluminum flocculant advantages.
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