**2.10 Other heavy metals in environment**

Thallium is present in insecticides, metal alloys and fire cracker. Phosphorus is found in insecticides such as organophosphate for example: malathion [25].

The environmental factors plays very crucial role in biosorption of heavy metals and these factors are pH, temperature, biomass concentration, metal ion concentration. Algae, fungi and bacteria acts as biosorbents and helps in mechanism of biosorption [26].
