Contamination of water by toxic heavy metals Environmental science essay
Water pollutants come from point sources or dispersed sources. A point source is a pipe or channel, such as those used for drainage from an industrial facility or a city sewer system.A, Urbanization and industrialization have contributed to the rapid spread of harmful compounds and heavy metals into nature, which are destructive to nature. resources, such as water ecosystems, soil and air due to their overuse and misuse Ahmad et al. 2021. A serious global environmental problem is caused by heavy, 1. Introduction. The supply of safe drinking water is crucial to human life, and safe drinking water should not pose a significant risk to humans WHO, 2011. Although low levels of heavy metals are essential to human health, excessive amounts of these metals can have negative effects USEPA, 2015 The heavy metals end up in the environment. The standard for soil, as laid down in the Indian Heavy Metal Standards, -6, 135-270, 75-150, 250-500,-kg for Cd, Cu, Ni, Pb. , respectively Zn, 5 Heavy metal pollution is currently a major environmental problem because metal ions remain in the environment due to their non-degradable nature. The. Concentrations of the heavy metals Cu, Ni, Pb, Zn, Cd and Cr were investigated in surface water and sediment of the Luan River in China. With a decrease in Cu and Ni concentrations in surface water at downstream stations. This finding suggests that water flows are an important explanatory factor in heavy metal pollution. Editors' Choice: Heavy Metal Pollution. As a result, heavy metals, metal elements with a relatively high density and high toxicity, are increasingly entering the environment. 1 Introduction. Nowadays, heavy metal pollution is a serious problem. They are the leading cause of soil pollution due to their toxicity and persistence in the environment. 1. Rapid industrialization, air deposition, farmyard manure, sewage sludge and extensive use of synthetic fertilizers are all contributing factors to the presence of anthropogenic activities. , which mainly come from the agricultural, industrial and urbanization sides, currently cause pollution of the rhizosphere or atmosphere, including the accumulation of heavy metals and other toxic fumigation chemicals that pose a threat to the environment. metal contamination,