PTS的温控优化制备及对低温低浊水的处理效果  

Effect of Temperature on Preparation of Polysilicate-titanium and Its Application for Treating Low Temperature and Turbidity Water

作　　者：于兴海 王迅 刘玉灿[1] 李伟[1] 段晋明[1] YU Xing-hai;WANG Xun;LIU Yu-can;LI Wei;DUAN Jin-ming(School of Environmental and Municipal Engineering,Xi＇an University of Architecture and Technology,Xi＇an 710055,China;CBMI Construction Co.Ltd.,Beijing 100176,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]中材建设有限公司,北京100176

出　　处：《中国给水排水》2018年第19期52-56,共5页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51308437);陕西省教育厅专项科研基金资助项目(16JK1447)

摘　　要：为提高低温低浊水的混凝效果,制备了聚硅酸钛(PTS)助凝剂,并分析了活化温度对其性能的影响。当活化温度由15℃增加至40℃时,制备的PTS在水中的分散物粒径由11. 09μm增大至13. 5μm,而Zeta电位由-15 m V降低至-17. 5 m V。同时,在较高的活化温度(40℃)条件下,研究了金属钛对活化硅酸(PS)的影响,通过对粒径、Zeta电位以及红外光谱分析可知,金属钛提高了PS的聚合反应速度,生成PTS的聚合度及Zeta电位均高于PS。将制备的PTS与Al2(SO4)3共同用于处理低温低浊水,结果表明,当Al2(SO4)3投加量为2 mg Al/L时,投加7. 5 mg/L的PTS就能使浊度去除率达到95%以上,残留的浊度小于0. 5 NTU。此外,pH值对PTS的助凝效果有明显影响,当pH值为6、7和8时,PTS对浊度的去除率分别为66. 7%、91. 0%、81. 5%,较使用PS分别提升了3. 1%、7. 6%、6. 6%。因此,PTS是处理低温低浊水的高效无机高分子助凝剂,对浊度的去除效果优于PS。For the poor coagulation effect of low temperature and turbidity water, polysilicate-tita- nium （PTS） was prepared, and the effect of activation temperature on its property was investigated. The results indicated that the dispersed particle size of PTS in solution increased gradually from 11.09 μm to 13.5 μm with the increase of activation temperature （from 15℃ to 40℃ ）, but Zeta potential was decreased from - 15 mV to - 17.5 mV. Meanwhile, the effect of titanium on polymerization of silicate was studied at a higher activation temperature of 40℃. According to analysis of the dispersed particle size, Zeta potential and the infrared spectrum, it was found that the addition of titanium promoted polymerization of silicate and the polymerization degree and Zeta potential of PTS were higher than those of polysilicate （PS）. The prepared PTS and Al2（SO4）3 were together used to treat low temperature and turbidity water. The results showed that the removal rate of turbidity was over 95% with residual turbidity less than 0.5 NTU, when dosages of Al2 （ SO4 ） 3 and IriS were 2 mgAl/L and 7.5 mg/L respectively. It also found that the pH value had a significant effect on coagulation effect of PTS. In the pH range from 6 to 8, the corresponding removal rates of turbidity by PTS were 66.7%, 91.0% and 81.5% respectively, which increased by 3.1% , 7.6% and 6.6% compared with that of PS. Therefore, IriS is a high efficiency inorganic polymer coagulant for treating low temperature and turbidity water, which has better removal effect on turbidity than that of PS.

关 键 词：聚硅酸钛 活化硅酸 低温低浊水 活化温度 

分 类 号：TU991[建筑科学—市政工程]