Lead is one of the non-essential heavy metals which is toxic to environment. If accumulated beyond the threshold value, this metal ions may cause problems for the survival of organisms and the environment. One effort ...

Manganes oxide has structures such as layered, tunnel, and amorphous. Birnessite is a mangane oxide with layered structure. Birnessite has never been found in a pure form in nature. The pure birnessite can be obtained by ...