其2种可能原因如下：一是由于高分子聚合明显物链对所加入的无机盐离子有静

The two possible reasons are as follows: one is that the polymer chains have electrostatic attraction to the added inorganic salt ions. The electrical neutralization is affected, the repulsive force inside the polymer chain is reduced, and the decolorization effect is significantly reduced. Second, the anion in the inorganic salt will compete with the anionic dye for the adsorption site of the cationic adsorbent, thereby affecting the decolorization performance. From the decolorization effect, it can be seen that the adsorption process is the synergistic result of several effects, such as electric neutralization, bridge adsorption and roll sweep net capture. The effect of inorganic salts on the decolorization performance of SG-APT-DDF adsorbent is PO43->CO32->SO42->NO32->Cl- in descending order. reduce.

Two possible reasons are as follows: first, the polymer chain obviously has electrostatic attraction to the added inorganic salt ions. With the continuous increase of inorganic salt concentration, the charged amount of adsorbent as cationic polymer continues to decrease, resulting in the influence of electric neutralization and the reduction of repulsive force inside the polymer chain, The second reason is that the anions in inorganic salts will compete with anionic dyes for the adsorption site of cationic adsorbent, which will affect the decolorization performance. From the decolorization effect, it can be seen that the adsorption process is the synergistic result of several effects, such as electric neutralization, bridging adsorption and roll sweeping net capture. The influence of inorganic salts on the decolorization performance of sg-apt-ddf adsorbent is PO43 - > CO32 - > SO42 - > No32 - > Cl -. With the increase of inorganic salt concentration, the decolorization efficiency of the adsorbent decreases.

The two possible reasons are as follows: firstly, because the obvious polymer chain has electrostatic attraction to the added inorganic salt ions, with the increase of inorganic salt concentration, the charge of adsorbent as cationic polymer decreases continuously, which leads to the influence of electric neutralization, the decrease of repulsion force inside the polymer chain and the obvious decrease of decolorization effect; secondly, because anions in inorganic salts compete with anionic dyes for the adsorption position of cationic adsorbent, thus affecting the decolorization performance. From the decolorization effect, it can be seen that the adsorption process is the synergistic result of several functions, such as electric neutralization, bridging adsorption and sweeping net catching. The influence of inorganic salt SG-APT-DDF adsorbent on decolorization performance is PO43-> CO32-> SO42-> NO32- >Cl-, and the decolorization efficiency of adsorbent decreases with the increase of inorganic salt concentration.