Essay On Heavy Metal Pollution

Words: 1182

Pages: 5

Open Document

Heavy metal pollution of soil is usually related to human activities. Sites near mining activities or heavy industry are often highly contaminated with toxic metals. Besides, application of low-quality fertilizers contaminated with heavy metals, e.g. cadmium, increased metal content in top-soils (Lado et al., 2008). Such highly polluted soils are hardly usable for agricultural purposes, because the pollution can be transferred into the food chain. Heavy metals bounded in the soil are leachable, they can be also spread via ground water. To avoid the danger of contaminant spread, it is possible to use phytoremediation techniques, which can immobilize pollutant, decreasing the soil or water pollution (Salt et al., 1998). Plants are able to immobilize metals in soil by formation of …show more content…
Sorghum plants are multipurpose cereals of potential interest for several non-food uses, especially as energy crops (Barbanti et al., 2006; Meki et al., 2013). The crop is resistant to drought, heat stress, and toxic pollution. It was shown that sorghum plants were able to accumulate large quantities of Cd, Cu, Pb, and Zn in the shoots and their biomass production was higher than that of sunflower or corn (Epelde et al., 2009; Zhuang et al., 2009). Moreover, other studies demonstrated that sorghum plants were highly tolerant to metal pollution and able to reach high biomass, even in the presence of heavy metals (Pinto et al., 2004; Hernández-Allica et al., 2008; Angelova et al., 2011). Only few studies have dealt with practical applications. A field trial with sorghum plants was located near the lead and zinc mining site in China (Zhuang et al., 2009). Another field trial was in Bulgaria near non-ferrous-metal works. All plants accumulated heavy metals primarily in roots, however, relatively high amount of Cd was found in stems of Sudan grass (Angelova et al., 2011). Experiments were also focused on heavy metal polluted marginal

Essay on Pollution: Environmentalism and Heavy Metal Pollution

the possible fluctuations in the amount of pollution produced by the facilities. The pollution being produced by these facilities is rising and falling all of the time. A probabilistic risk assessment framework was developed based on a detrended fluctuation analysis to predict future respiratory virus and air pollutant associated with asthma. To study the magnitude of heavy metal pollution in the North Atlantic Refining Company, seven heavy metals including Zn, Cu, Pb, Cd, Mn, Fe, and Ni were…

Words 497 - Pages 2

Essay on Global warming

forest, and by taking part in other activities that release certain heat trapping gases into the air. For this exploratory essay, I want to look more deeply and figure out some significant causes of this worldwide issue, global warming. I set for myself this question: What are the main causes of global warming created by human beings? My exploratory began with an article: “Pollution in Overdrive” from The Washington Post by Sholnn Freeman, a Washington post staff writer. In this article, the author uses…

Words 1635 - Pages 7

Essay on 18 Withgott 2ce Tif

Discarded electronic waste can leach heavy metals including lead. The light-coloured bar shows the percentage of electronic devices leaching. The U.S. EPA's regulatory threshold for lead leachate is 5 mg/L. The graph shows the percentage of devices that exceed the threshold, as well as the average concentration of lead leachate from each waste category. Use Figure 18.1 to answer the following questions. 1) Refer to Figure 18.1. You want to reduce lead pollution from a landfill. The recycling of which…

Words 6100 - Pages 25

Essay on Environmental Ethics

and concentrations of pesticides in food crops, started to be seen as an environmental crisis in the 1960’s, which acted as the stepping-stone for environmental awareness. In 1967, historian Lynn White published an essay on the historical roots of the environmental crisis. Whites essay created many academic debates over the Judeo-Christian mode of thinking, which encouraged the exploitation of nature for human consumption. The ethical dilemma arises from the concern of whether or not it was morally…

Words 3430 - Pages 14

Mountaintop Removal Essay

The Appalachian region is filled with hills and hollows –these steep landmasses followed by little narrow valleys. These are among the world’s most ancient inclines. They are filled with huge dense and diverse hardwood forest with several streams and wildlife winding across these ancient landmasses. Every time of year that you venture here you can see new glories and different treasures. In early to mid October you began to see all these glorious colors, reds, yellows, and oranges sprinkle over the…

Words 4602 - Pages 19

Essay on Whatever: World War Ii and Stanza

crowd of people wearing sandals, a cock that crows, a cloak to dissect, a sponge, some vinegar and one man to hammer the nails home.Or you can take a length of steel, shaped and chased in a traditional way, and attempt to pierce the metal cage he wears. But for this you need white horses, English trees, men with bows and arrows, at least two flags, a prince, and a castle to hold your banquet in.Dispensing with nobility, you may, if the wind allows, blow gas at him. But…

Words 3943 - Pages 16

technology and ethics Essay

surroundings in a number of ways. In many societies, technology has helped develop more advanced economies (including today's global economy) and has allowed the rise of a leisure class. Many technological processes produce unwanted by-products, known as pollution, and deplete natural resources, to the detriment of Earth's environment. Various implementations of technology influence the values of a society and new technology often raises new ethical questions. Examples include the rise of the notion of efficiency…

Words 6502 - Pages 27

Climate Change: Too Hot To Handle

For many negative effects about climate change, people may develop diversity perspectives based on their own situations. Three typical perspectives which are Australian government, developing country and economist will be discussed in the following essay, and their correlations with common good and human flourishing will be analyses as well. As we considered climate change, we need consider the common good for all the humans on the earth. The common good refers to the total living conditions which…

Words 2545 - Pages 11

Want To Change Course

facilities along the roads will be better in use, by then people could further improve their working efficiency, etc.. As I know, the second opinion is more reasonable and feasible, because it has two advantages: Firstly, the government could reduce heavy burdens, simplify and make clear the usage of money; Secondly, tax-payers are clear about the usage of money they turn over, thus improve the transparency. Therefore, it is a good measure for both sides to allocate money from the tax paid by people…

Words 7864 - Pages 32

British Petroleum (Bp) Case Study Essay

Deepwater Horizon drilling rig in the Gulf of Mexico led to the largest accidental release of oil into marine waters in history. As a result, a huge loss of money and life was caused and affected serious environmental damage to wild animals and water pollution. BP was accused of their irresponsibility that it took 87 days before the well was closed and sealed. BP’s shares…

Words 5552 - Pages 23