Interactions between Phosphoric/Tannic Acid and Different Forms of FeOOH

Table 1

The combinations of tannic acid/phosphoric acid (wt%).

Number	Tannic acid/phosphoric acid	Labeling
1	3% tannic acid + 10% phosphoric acid	3T-10P
2	3% tannic acid + 20% phosphoric acid	3T-20P
3	3% tannic acid + 30% phosphoric acid	3T-30P
4	5% tannic acid + 10% phosphoric acid	5T-10P
5	5% tannic acid + 20% phosphoric acid	5T-20P
6	5% tannic acid + 30% phosphoric acid	5T-30P