Arsenic and Lead removal from water by nano-photocatalytic systems (A review)

Shaghayegh Sadr¹ Amir Ershad Langroudi² Arezoo Nejaei³ Ahmad Rabii⁴ Nabiolah Mansouri⁵

1) Department of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran.
2) Department of Color, Resin and Surface Coatings, Faculty of Processing, Iran Polymer and Petrochemical Institute (IPPI), Tehran, Iran.(Corresponding author)
3) Department of Environment, Tabriz Branch, Islamic Azad University, Tabriz, Iran.
4) Department of Polymer Science, Iran Polymer and Petrochemical Institute (IPPI), Tehran, Iran.
5) Department of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran.

Publication : 2nd International Congress On Engineering, Technology and Innovation(eticong.com/2nd)
Abstract :
Water is an essential component in the world. Presence of heavy metals in water has dramatic effects on health and ecological process in environment. Heavy metal pollution in water bodies is an existing and developing problem in the world. There are several methods for removal these pollutants in water. Photocatalytic degradation is a useful approach to remove a variety of heavy metals from contaminated water. In this study, we summarized different types of methods for removal of heavy metals from water. Each method has some limitation and advantages and based on different research that scientists presented, efficiency of each technique is depended on some conditions such as pH, adsorption time, solvent type and UV light, so we still can’t introduce the best method. Nowadays researchers are trying to find a method with high efficiency, low cost, least risk for environment and without secondary contamination. Hopefully, researchers find many promising methods that can be used with high efficiency in the future by continuing the research.
Keywords : heavy metals photocatalytic water