1 Subjects: “...heavy metals pollution...”

2 Subjects: “...metal ions...”

3 Subjects: “...heavy metals...”

4 Subjects: “...metal-oxide catalysts...”

5 Subjects: “...ligand to metal charge transfer (LMCT)...”

6 Subjects: “...transition metal...”

7 Subjects: “...heavy metals...”

8 Subjects: “...heavy metals...”

9 Subjects: “...heavy metals...”

10 Subjects: “...composite heavy metal contamination...”

11 Subjects: “...heavy metals...”

12 Subjects: “...heavy metals...”

13 Subjects: “...heavy metals...”