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对凹凸棒石黏土(ATP)进行了湿法提纯,对提纯后的ATP进行了NaOH处理和浓度分别为1mol/L、2mol/L和3mol/L的HCl处理。用透射电子显微镜(TEM)和X射线衍射仪(XRD)对经不同方式处理的样品进行形貌和物相分析,并测定样品的比表面积、孔结构和Zeta电位。结果表明,湿法提纯可以除去SiO2、Al2O3杂质,提纯过程未对ATP的纤维结构和物相造成改变。3mol/L的酸处理溶出ATP结构中物质SiO2,ATP的纤维结构被破坏,使其断裂形成碎片并形成SiO2。研究了原土、提纯土和各种活化土对浓度为0.01mol/LFe3+、Ni2+和Cr2O27-的吸附效果,分析了不同处理方法对离子吸附率的影响。结果表明,ATP对阳离子的吸附率大于阴离子,吸附率的大小与ATP表面Zeta电位密切相关。
Wet purification of attapulgite clay (ATP) was carried out. The purified ATP was treated with NaOH and HCl concentrations of 1 mol / L, 2 mol / L and 3 mol / L, respectively. Morphology and phase analysis were performed on the differently treated samples by transmission electron microscopy (TEM) and X-ray diffractometer (XRD), and the specific surface area, pore structure and Zeta potential of the samples were determined. The results showed that SiO2 and Al2O3 were removed by wet purification, and the structure and phase of ATP were not changed during purification. 3mol / L acid treatment eluted ATP structure material SiO2, ATP fiber structure is destroyed, making it broken fragments and the formation of SiO2. The adsorption effect of original soil, purified soil and various activated soil on the concentrations of 0.01 mol / L Fe3 +, Ni2 + and Cr2O27- was studied. The effects of different treatment methods on the ion adsorption rate were analyzed. The results showed that the adsorption rate of ATP to cation was larger than that of anion, and the adsorption rate was closely related to the Zeta potential of ATP surface.