Wednesday, 06 May 2015.
Heavy metals are metal chemical elements with high density and high concentrations of toxic or toxic substances at low concentrations (Azal et al, 2013). Cadmium, arsenic, thallium, lead and stones are some of the metals included in the list of heavy metals, and they are usually part of the human body through drinking water, food and air. Some of the heavy metals are useful for maintaining metabolism in humans and include selenium, copper and zinc. However, these metals can become poisonous at high concentrations. For example, it is possible to develop poisoning from drinking water, which is transmitted through lead pipes, food chain or high ambient air concentrations. This essay is thus aimed at discussing both natural and artificial heavy metals sources, as well as the impact of heavy metals on health and the environment. It will also consider road traffic accidents involving heavy metals and water-related accidents
Heavy metals can occur naturally as a result of the physical and chemical effects of metamorphic and non-foil soils and rocks that also transport metals to water. Heavy metals can also be derived from atmospheric particle decomposition and atmospheric deposition from wind erosion, volcanic activity, plant fibres, ocean spray and forest fires. Heavy metals found in geological structures can penetrate and exist in water through natural processes. For example, the flow of water or heavy rain usually leads to the loss of heavy metals from geological formations (Ardau et al, 2006). Such processes are deteriorating when geology is upset by economic transactions, such as mining, as these are mined areas, resulting in adverse effects such as acid drainage (Wyk, 2012)
Heavy metals found in water resources can also be artificial, resulting in water penetrating into the water
Heavy metals can have a negative impact on the environment, thereby destroying aquatic organisms. According to RAI (2008) such destruction may be caused by poisoning caused by metal composition of metal and water chemistry in the water system. High concentrations of metals in water influence aquatic organisms in the sense that they turn their morphological fabrics, suppress their development and growth, change their chemistry and lead to low efficiency. Water plants are also affected because they cannot successfully control the uptake of metal
Ingling heavy metals through contaminated water can also pose a great risk to human health. For example, lead can also act as a substitute for calcium, especially for children, given that they require high levels of calcium to develop their skeletal systems. Although the levels of lead contained in the bones are not harmful, high concentrations can cause neurotoxicity, nephrotoxicity and hypertension (Afzal et al., 2013). Mercury is also a serious threat to human health since, when it comes into contact with water, it is generally in microorganisms, resulting in a form of methyl mercury poisoning. Symptoms of acute intoxication caused by heavy metals may be caused by vomiting or other symptoms, and chronic poisoning may cause damage, liver damage or tertogenenistic. In particular, arsenic can induce vomiting, heart anomaly and diarrhoea, and chromium is associated with adverse health effects, such as respiratory and dermatological problems (Afzal et al, 2013)
Many regions suffered heavy metal related to metal, and one of the main examples was the 2005 negative environmental disaster on the Songhua River after the chemical plant explosion in Jilin city, and thus contaminated the river with some 110 tonnes of heavy metals (Gleick, 2009). As a result, the pollution flows through the flow and forces the authorities to temporarily suspend the supply of water to about 4 million people living in Harbin. Another example relates to the chemical “Sandoz” in November 1986 “in SchweizerhalleSwitzerland”. The accident resulted in the release of toxic agricultural chemicals, which contained heavy metals (e.g., mercury), while mass tons of pollutants were simultaneously released on the Rhine, turning it into red. The pollution resulted in the mass deaths of wild animals, which subsequently destroyed most of the population of European elites in the Rhine River (Halfon & Buggermann, 2006)
This essay discussed the various sources of heavy metals in water resources and demonstrated that such metals could pose serious risks to human health and the environment. He also cited examples of accidents involving water pollution through heavy metals
Azal, S., Sarar, K., Hamed, S., Bwarwana, S., Shkoor, M., Ali, S., Fatima, S., & Tauqeer, H. (2013). Heavy metals, as well as effects on living organisms. Ridge
Ardau C., Concas A., Cristini A., Zuddas P., & Cao, G. (2006). Mobility of Heavy Metals from Tailings to Stream Waters in a Mining Activity Contaminated Site.
Gleick, P. (2009). China and water.
Halfon, E., & Buggermann, R. (2006). Environmental chemicals Ran o f Chemicals Spilled in the Rhine River in November 1986.
Paradis, K. (2008). Pollution of heavy metals in aquatic ecosystems and its Phytoremedition with the use of water tablets: Environmentally sustainable approach.