摘要
制备了新型含硼聚硅酸铝锌(B-PSAZ)无机高分子絮凝剂.利用X-射线衍射、红外光谱及扫描电镜等分析方法对絮凝剂进行了表征与分析.分析表明,硼离子的引入改善了絮凝剂的结构形态,增强了絮凝剂的吸附架桥和卷扫网捕作用,阻碍了胶粒的凝聚,从而提高了絮凝剂的稳定性.此外对B-PSAZ最优制备条件进行了研究,确定最优条件为:硅酸钠的浓度0.5 mol·L-1、n(Al)/n(Si)=2.0、n(Zn)/n(Si)=3.0、n(B)/n(Si)=0.24.最后用B-PSAZ对H-酸模拟印染废水进行絮凝处理并确定出最佳絮凝条件.结果表明,在投加量为30 mL·L-1,pH值为11的条件下,B-PSAZ处理后的H-酸模拟印染废水色度去除率达到93.5%,COD去除率达到78.5%.
A new type of inorganic polymer flocculant, boron-containing polysilicate aluminium zinc （ B-PSAZ）, was prepared. X-ray diffraction, infrared spectroscopy and scanning electron microscopy were used to characterize the prepared flocculant. Characterization analysis showed that the introduction of boron ions improved the structure properties of floeculant and enhanced the flocculant adsorption bridging action and sweep flocculation, hindered the coagulation of colloidal particles, and thus improved the stability of flocculant. In addition, the optimal preparation conditions were proposed as follow： the concentration of Na2 SiO3 is 0. 5 mol· L^-1, n （Al）/n （Si）= 2.0, n（Zn）/n（Si）= 3.0, n（B）/n（Si）= 0.24. Finally, H-acid solution and the optimal flocculation conditions pH of H-acid solution was adjusted to 11 and the dosage rate was 93.5% and the COD removal was 78.5%. the prepared B-PSAZ was applied to treat were determined. Results showed that when of B-PSAZ was 30 mL·L^-1 , the degradation rate was 93.5% and the COD removal was 78.5%.
出处
《环境化学》
CAS
CSCD
北大核心
2014年第7期1214-1221,共8页
Environmental Chemistry
基金
榆林市2011年产学研合作项目
陕西省科技厅社发攻关项目(2013K13-01-04)资助
关键词
含硼聚硅酸铝锌
絮凝剂
印染废水
去除率
boron-containing polysilicate aluminium zinc, flocculant, printing and dyeingwastewater, removal rate.
