Hazardous heavy metals such as cadmium (Cd), chromium (Cr), copper (Cu), manganese (Mn), nickel (Ni), lead (Pb), and zinc (Zn) are the most dangerous contaminants, accumulate in the environment and cause serious damages to ecosystems and human health. Generally, heavy metals are released in to environment through different natural and anthropogenic process and could contaminate the available atmosphere, hydrosphere, upper exosphere (soil) and even biosphere of the earth. Therefore, keeping in view the sources (i.e., natural and anthropogenic) this book was designed to investigate the...