Explain Why Heavy Metals Are Not Removed From The Environment

     Heavy metals, such as copper, lead, mercury, and selenium are another group of toxins that pollute the water as well as the rest of the environment. The source of many of these pollutants are industries, automobile exhaust, mines, and even natural soil.

Most people are surprised to learn that their bodies are contaminated with heavy metals. This is a little-known problem that has grown into a widespread issue. There are many different ways your body becomes contaminated with heavy metals, such as through the type of cookware you use, the tap water you drink and the fillings you have in your teeth. Fortunately, there are natural ways to cleanse your body of these harmful toxins, such as with chlorella. This is an algae found in nature and is oftentimes used in integrative medicine by naturopathic doctors in Arizona.

Chemical elements can cause harmful effects on human health due to the use of plants that are grown in contaminated soil. Through bioaccumulation, over plants that absorb an element from the soil, elements enter into the food chain and shall be deposited in the human body. Root system in plants plays an important role in the distribution of elements from the soil through the plant. Elevated pH values can affect the lack of accessible forms of specific nutritious elements. The value of pH has a decisive influence on the dynamics of all the elements in the soil, especially micro elements and heavy metals. In the acidic environment the solubility of metals increases, they cross to the solution of the soil from which the plant adopted them, which can lead to greater adoption of these elements by plants. The increase in soil acidity reduces the amount of plant available phosphorus, which by binding to iron and aluminum becomes difficult soluble phosphates (Resulović, Čustović 2002) Also, there is a more intensive adoption of manganese and its toxic effects on

abundantly in the air and in humans, they need this element to survive. They also release carbon

Physico-chemical methods such as chemical precipitation, chemical oxidation or reduction, filtration, ion exchange, electrochemical treatment, reverse osmosis, membrane technology and evaporation recovery have been widely used to remove heavy metal ions. These technologies usually produce wastes with high concentrations of metals which are a significant source of environmental pollution. Furthermore, the above methods may be ineffective or expensive, especially when the heavy metal concentrations

Environmental pollutants are becoming increasingly present throughout the world as industrial progress has expanded in countries like China. Among these environmental pollutants, Cadmium has been characterized as the most dangerous heavy metal ion because of its resiliency and numerous negative health effects (Kermani et. Al., 2010). Growing dependence on chemical fertilizer, wastewater irrigation, and uncontrolled discharge of industrial waste from activities, such as mining and smelting, has led to large amounts of Cadmium in soil (Nazar et. Al., 2012).

Ground water is present below the surface in porous rocks and is susceptible to contamination by natural and especially human related activities. Large amounts of chemicals like soap and detergents, fertilizers and pesticides, pharmaceutical by-products are discharged in to fresh water aquifers every day. These contaminants leach in to the soil and dissolve in ground water. Different contaminants have different rates of solubility and degradation once they reach the underground water table either by simple flow or by the downward movement of rain water. The ground water may become contaminated with both organic and inorganic substances especially heavy metals like Cadmium, Chromium and Nickel, etc. (Christensen et al, 2001). Pharmaceutical wastes can cause cancer in human cells. (Krifa et al. 2013). Many pharmaceutically active chemicals reach

Heavy metals are elements that exhibit metallic properties. It mainly includes the transition metals, basic metals, some metalloids, lanthanides, and actinides. Many different definitions have been proposed—some based on density, some on atomic number or atomic weight, and some on chemical properties or toxicity (Duffus, 2002). Example for some heavy metal are iron (Fe), zinc (Zn), copper (Cu), lead (Pb), mercury (Hg), cadmium (Cd) etc.

elements are not necessarily harmful to a person’s health. However, when they are combined in

Chemical Hazards Chemicals are both naturally occurring and man-made. From the environment, exposure to chemical agents in our air, water, food and soil, have shown to be hazardous to human health causing cancer and lung disease, metabolic issues, brain damage, and even birth defects. Essentially, these chemicals act as toxins and poisoning, also playing a role in infectious diseases and causing the body's immune system to break down. The World Health Organization, for instance, believes that billions of people are exposed to chemical hazards on a regular basis (solvents, acids, pesticides, etc.), but at different levels and differing levels of toxicity and over differing periods of time. The exposure rate, especially from heavy metals and agricultural waste and products, seem to be the most serious over time, but even such products as led and arsenic can cause cancers that are serious and attributable to environmental standards (World Research Institute, 2000).

Heavy metals such as arsenic (metalloid), mercury, lead, and cadmium have a rich history throughout the world. From Ancient Rome to the Vietnamese War, heavy metals have been used in many different ways, sometimes leading people to death or illness. This research essay will go through the history of the above-mentioned metals, how they were used, and how they can affect people.

The environment is always facing sudden changes due to natural forces like the eruption of volcanic and earthquakes. However human activities have in the recent times being blamed as the major contributor to the majority of the environmental problems that there are today. Among the numerous environmental issues is pollution. Human activities have been solely responsible for soil, water, and air pollution that has made the entire environment polluted thus becoming a health hazard to all animals, plants, and people living in it. This is because all living things whether plants or animals depends on water, soils and air for survival.

With the fast advancement of enterprises, water asset shortage, populace development, contamination of surface and groundwater by releasing poisonous wastewater and ensuing maladies may raise the need of reusing and treatment of wastewater. The expelling of poisonous overwhelming metal particles from sewage, particularly in modern and mining waste effluents, has been generally examined as of late. Substantial metals wastewaters are specifically or in a roundabout way released into the earth progressively, particularly in creating nations. Dissimilar to natural contaminants, substantial metals are not biodegradable and have a tendency to aggregate in living life forms and numerous overwhelming metal particles are known to be poisonous or

Different industries such as steel manufacturing, fertilizer and pesticide industry, leather tanning, electroplating, metallurgy, mining and smelting of metalliferous, surface finishing industry, energy and fuel production industries, electrolysis, electro-osmosis, photography, electric appliance manufacturing, metal surface treating industries are mainly responsible for releasing heavy metals into the environment , effluents of these industries are mainly loaded with heavy metals ions.

Contamination of surface water is mainly due to discharge of untreated industrial and agricultural effluents that ultimately find their way into the verity water bodies. And this raises a very high probability of heavy metal contamination in surface water that affects all living organisms by entering the food chain. This is particularly problematic