Nanohybrid Photocatalysts for Heavy Metal Pollutant Control

In this decade, the environmental problem, especially for the wastewater treatment issue, has become a widespread concern. In the meantime, heavy metal pollutants have also caused great attention owing to their recalcitrance persistence and the large discharge scale into the environment. Heavy metal is defined as the element with the atomic weights between 63.5 and 200.6. In our environment, some hazardous heavy metals such as chromium (Cr), mercury (Hg), arsenic (As), lead (Pb), copper (Cu), nickel (Ni), etc. exist in the surface fresh water. Heavy metals tend to accumulate in the organism via the food chain and caused serious harm to the organism. Therefore, it is urgent for the worldwide researchers to find effective treatment strategies to remove heavy metal from wastewater.