盾构泥基陶粒的制备及其吸附性能研究

Study on Dehydration and Comprehensive Utilization of Shield Mud-based Ceramsites

    摘要
  • 摘要: 针对盾构泥含水率高以及综合利用的问题，研究了pH值、助滤剂种类（GPB、粉煤灰、石膏、谷糠）和压力对含水率影响，以及加入添加剂（AlCl3、ZnCl2、Fe2O3、Fe3O4、NH4HCO3）烧制成陶粒对亚甲基蓝溶液COD去除的效果。试验结果表明，4种助滤剂中改性酰胺絮凝剂（GPB）能更有效地降低盾构泥的含水率；在pH值为4且压力值为800 Pa的条件下，加入GPB可以将含水率值从38.89%降至24.40%；添加剂筛选试验表明，通过添加NH4HCO3烧制的陶粒能有效降低亚甲基蓝溶液的COD；添加剂用量试验表明，通过添加10% NH4HCO3焙烧而成的陶粒能够将亚甲基蓝溶液中的COD值从162.75 mg/L降到90.64 mg/L。

     

    Abstract: Aiming at the problems of high water content and comprehensive utilization of shield mud, we studied the effects of pH, type of filter aid(GPB, fly ash, gypsum, chaff) and pressure on the moisture content as well as the removal of COD from methylene blue solution by sintered ceramsites with additives (AlCl3, ZnCl2, Fe2O3, Fe3O4, and NH4HCO3). The results showed that the modified amide flocculant (GPB) could reduce the moisture content of shield mud effectively in the four kinds of filter aid. Under the condition of pH value of 4 and pressure of 800 Pa, adding GPB could reduce the moisture content from 38.89% to 24.40%. Screening test results for additives shown that the sintered ceramsites made by adding NH4HCO3 could reduce COD of methylene blue solution effectively. The additive dosage test showed that the sintered ceramsites made by adding 10% NH4HCO3 could reduce the COD of methylene blue solution from 162.75 mg/L to 90.64 mg/L.

     

    • HTML全文
    • 参考文献(14)
    • 相关文章
    • 施引文献
  • 资源附件(0)

/

返回文章
返回