REMOVAL OF HEAVY METAL FROM THE METAL FINISHING INDUSTRY WASTEWATER BY CHEMICAL PRECIPITATION

In recent years with the increase in population, threatening the nature of human life contaminated with the increase in industrial activity it has reached such dimensions.These problems are due to the rapid industrialization and population growth began frequently to appear on the agenda. In particular, heavy metals leaked into the environment from industrial waste pollution are a very important pollutant that is treating wildlife. These pollutants, firstly from the plants through the soil and water, and then reaches through the food chain to animals and humans. Heavy metals pollution is very important, because they are resistant to biodegradation, and also turn into complex structures combine with other molecules such as proteins. Chromium (IV) is located in the most important heavy metals in waste water and chromium quickly transformed into stable structures, which leads to long-term contamination in the environment. There are many methods, including mainly chemical procedures in wastewater treatment plant metal coating industry. In this study, the chromium metal coating plant, aimed nickel and identification of factors affecting the chemical precipitation and precipitation wastewater contains heavy metals. Studies on the costs for all three metal of 99.9% recovery were obtained.