The effects of petroleum sulphonate, HPAM and pH value on the zeta potential of Na-montmo-（rrillonite） suspensions were investigated, and orthogonal design of experiment was used to study the effect of these factors...The effects of petroleum sulphonate, HPAM and pH value on the zeta potential of Na-montmo-（rrillonite） suspensions were investigated, and orthogonal design of experiment was used to study the effect of these factors on the zeta potential of montmorillonite suspensions when the three factors existed simultaneously. The results show that the zeta potential of montmorillonite becomes more negative with the increase of the concentration of petroleum sulphonate, that of HPAM, and the pH value. Moreover, FpH=13.3(>F0.01=9.78), FHPAM=7.73(>F0.05=4.76) and Fpetroleum sulfonate=3.05 when the three factors co-exist, thus the effect of pH value on the zeta potential of montmorillonite is the most prominent factor, the HPAM a less prominent factor, and the petroleum sulphonate is least prominent.展开更多
Ferrocene and SOD-ferrocene modified gold electrodes were made by crosslinkage method with fress egg white and glutaraldehyde,and cyclic voltammetry was used to study these electrodes in phosphate buffer solution of d...Ferrocene and SOD-ferrocene modified gold electrodes were made by crosslinkage method with fress egg white and glutaraldehyde,and cyclic voltammetry was used to study these electrodes in phosphate buffer solution of different pH values and different concentrations of H2O2.The results indicated that in alkaline solution the cathodic response of ferroence was inhibited more greatly than the anodic response of ferrocene.The results also indicated that the cathodic peak current of ferrocene decreased rapidly while the anodic peak current decrased slightly with the addition of H2O2.But the ferrocene modified on the electrode was not lost,so we concluded that ferroence（+1）could be catalytic to the decomposition of H2O2.The behavior of SOD-ferrocene modified electrode indicated that SOD could prohibit the decrease of the peak current of ferrocene in the presence of H2O2.But with the increase of concentrations of H2O2 the peak currents of SOD-ferrocene modified electrode began to decrease too;and it could take on the same electrohehavior of ferrocene modified electrode when the concentrations of H2O2 are high enough.展开更多
文摘The effects of petroleum sulphonate, HPAM and pH value on the zeta potential of Na-montmo-（rrillonite） suspensions were investigated, and orthogonal design of experiment was used to study the effect of these factors on the zeta potential of montmorillonite suspensions when the three factors existed simultaneously. The results show that the zeta potential of montmorillonite becomes more negative with the increase of the concentration of petroleum sulphonate, that of HPAM, and the pH value. Moreover, FpH=13.3(>F0.01=9.78), FHPAM=7.73(>F0.05=4.76) and Fpetroleum sulfonate=3.05 when the three factors co-exist, thus the effect of pH value on the zeta potential of montmorillonite is the most prominent factor, the HPAM a less prominent factor, and the petroleum sulphonate is least prominent.
文摘Ferrocene and SOD-ferrocene modified gold electrodes were made by crosslinkage method with fress egg white and glutaraldehyde,and cyclic voltammetry was used to study these electrodes in phosphate buffer solution of different pH values and different concentrations of H2O2.The results indicated that in alkaline solution the cathodic response of ferroence was inhibited more greatly than the anodic response of ferrocene.The results also indicated that the cathodic peak current of ferrocene decreased rapidly while the anodic peak current decrased slightly with the addition of H2O2.But the ferrocene modified on the electrode was not lost,so we concluded that ferroence（+1）could be catalytic to the decomposition of H2O2.The behavior of SOD-ferrocene modified electrode indicated that SOD could prohibit the decrease of the peak current of ferrocene in the presence of H2O2.But with the increase of concentrations of H2O2 the peak currents of SOD-ferrocene modified electrode began to decrease too;and it could take on the same electrohehavior of ferrocene modified electrode when the concentrations of H2O2 are high enough.
