ipl-logo

The Effects Of Chromium On The Environment

609 Words3 Pages

Today, areas in many regions of the world face serious problems caused by the contamina- tion of the environment with heavy metals, frequently caused by industrial activities and sewage sludge application [10].
One of these metals is chromium. It exists in different oxidation states in the environment, with trivalent and hexavalent chromium being the most stable and abundant forms in soils [10]. Because of its widespread use combined with a high human toxicity, Cr(VI) is considered as a major pollutant.
In some cases, the contamination with Cr(VI) can be of natural origin. Starting from the mineral chromite (FeCr2O4 and MgCr2O4), chromium occurs naturally in the environment and can be found in multiple oxidation states, including Cr(VI) [8]. …show more content…

Serpentinites were found to be the rock type with the highest potential to pollute the water in the area [9].
However, anthropogenic release of Cr(VI) is much more frequent. Chromium is used in various industrial processes, including stainless steel plants, preparation of alloys, chrome plating, leather tanning, dye industry, industrial water cooling, paper pulp production, petroleum refining, wood preservation and even nuclear power. As a consequence of the broad use, chromium is present in effluents originated by these activities, polluting sediments, soil, water and air …show more content…

Many of these technologies can be applied for the removal of hexavalent chromium [1]:
1. Ex situ treatment technologies for water mostly use chemical reduction of Cr(VI) to Cr(III) followed by precipitation.
2. In situ treatment approaches often use chemical reduction and fixation for remedia- tion. Newer technologies include enhanced extraction, electrokinetics, phytoremedi- ation and natural attenuation.
Most often, a combination of these methods is used for a more efficient and cost-effective treatment of a contaminated site [1]. Today, the remediation of Cr(VI)-contaminated sites is usually based on physical and chemical approaches, but bioremediation is becoming increasingly significant [10].
Bioremediation of chromium is based on the microbial reduction of Cr(VI) to the much less toxic Cr(III). Moreover, it precipitates as Cr(OH)3 (in the pH range 6-9) and thus immobilizes the chromium in the soil matrix [5].
1.3 Scope and structure of the

Show More
Related
71 Words | 1 Pages

The harm that was caused by Chromium 6 to the Hinkley residents are they were affected by the groundwater contamination got cancer. This happened because the source of water that the residents use in their daily life is from polluted underground water. From year 1996, which the unfortunate incident happened, until year 2008, there were up to 196 cases of cancer were identified and confirmed among all the families in

Read More
592 Words | 3 Pages

Introduction Mercury cycles through the atmosphere, sediment and soil, and water. Volcanic eruptions and industrial pollution and/or malpractice (e.g., improper waste disposal), contribute to atmospheric emission. From the atmosphere, mercury can be deposited onto the soil and water. In water, mercury can be sedimented; methylation and demethylation can occur to mercury in soil, water and sediment. Methylmercury can bioaccumulate in aquatic organisms (Government of Canada, 2013).

Read More
638 Words | 3 Pages

Canada is the largest producer and exporter of potash. In 1943, potash was discovered in Saskatchewan during the process of drilling for oil. Since then potash has benefitted the economy of Canada and Saskatchewan a great deal, but it is harmful for the environment in many ways. Potash causes issue with land and water. Potash Corp is the world’s largest fertilizer company producing three primary crop nutrients, which includes potash.

Read More
753 Words | 4 Pages

Effect of cadmium on human body: Adverse Effect of cadmium on bone: Effect of toxic cadmium on bone became evident when the disease Itai-itai outbreak in Japan, with the consumption of heavily cadmium polluted rice it causes renal and skeletal damage in women (Kjellstrom 1992). It causes great threat to human health due to its long retention in kidneys (Jarup et al.1998). Low amount also effects the skeleton(Alfven et al.2004; Staessen et al.1999). Either it effects kidneys or bones is still unclear (Kjellstrom 1992). In comparision to cadmium, lead deposit in bones in replacement to calcium, and the skeleton consist of almost 90% of lead body (Berglund et al.2008; Nilssol et al.1991).

Read More
432 Words | 2 Pages

Chlorine is manufactured commercially by running an electric current through salt water. As results of this process a free chlorine, hydrogen, and sodium hydroxide are produced. Consequently, the Chlorine is changed to its liquid form by compressing the gas, the resulting liquid is the chlorine, which is usually mixed into drinking water and swimming pools to disinfect bacteria. Unfortunately, the chlorination causes the formation of the Disinfection By-products (DBPs), also known as Trihalomethanes (THMs) as a 90% of the population is drinking water that contain (DBPs). Researches proven that THMs is causing cancer in the laboratory animals.

Read More
841 Words | 4 Pages

Pollution in Honduras is something that is affecting Hondurans lately. Sadly in recent years pollution had increased due to hazardous activity on Honduras. To tell the truth Hondurans must begin to become aware of the country. Honduras 30 years ago was a very beautiful country, but lamentably it is being destroyed slowly as cancer destroys a body. Due to misunderstanding of people towards the environment, the country is getting worse.

Read More
582 Words | 3 Pages

Amy Seamon Period 2 12-21-16 Final Copy The copper, chromium and arsenic, CCA-treated wood, has been linked to certain types of cancer. The issue is that they need to remove that wood so no one gets hurt. The arsenic can come of on your deck when it rains so it ends up on your surface. It also can come off if your sanding.

Read More
1125 Words | 5 Pages

The technique heterogeneous photocatalysis belonging to advanced oxidation process have proved to be one of the most effective treatment methods for the removal of pollutants from wastewater. In this process strong oxidizing agent hydroxyl radicals are produced which oxidizes a wide variety of organic pollutants into innocuous end products such as carbon dioxide, water and mineral acids………

Read More
297 Words | 2 Pages

They are being accumulated and later on consumed by us. The dangerous chemicals are fluoride, arsenic and nitrates. Even the healthy minerals like calcium salts can

Read More
1306 Words | 6 Pages

There are high absorptions of sulfur and chlorine in Martian soil. This entails that both the soil and airborne dust might be acidic, which could pose a peril if they are introduced into an astronaut haven. It will constitute a major health risk to astronauts operating on the surface of Mars if even a small portion of the chromium contained in the Martian soil and airborne dust is hexavalent chromium. The human community would not be able to bear it, due to the toxic Martian soil and hazardous airborne dust found over a large extent of the planet’s surface. NASA planetary scientist Joel S. Levine reveals that “Airborne dust and soil on Mars contains trace amounts of hazardous chemicals, including compounds of toxic metals that are known to cause cancer over the long term if inhaled in sufficient quantities.”

Read More
1083 Words | 5 Pages

In a variation to this method, termed carbon-in-leach (CIL), leaching and adsorption are done in the same series of tanks. Today, cyanide leaching is the method ofchoice for the recovery ofmost ofthe world 's gold production. It all started with the reaIization by MacArthur and the Forrest Brothers in the 1890 's that gold and silver dissolved in

Read More
2736 Words | 11 Pages

Materials such as these are not only toxic and harmful, but accumulate in the environment, also these materials are not biodegradable (ibid). Thus, increasing the rates of deadly diseases such as, cancers, physical birth defects, and now other health problems are being observed (ibid). The accumulation of these atrocious materials causes a worrisome in the biodiversity of the environment. There are many more contributions to ocean pollution that many people don 't know

Read More
940 Words | 4 Pages

Speaking of water, our bodies consist of almost two third of water therefore it should not take a lot of imagination to figure out that water is one of the most important ingredients and nutrients we supply our bodies with on regular and plentiful basis. Our body depends on water and good quality water is absolutely crucial for our good health. Modern water treatment plants add many chemicals, particularly chlorine and fluorine that makes tap water unsafe and even harmful to drink.

Read More
1525 Words | 7 Pages

Sewage is a blend of squanders, both residential and modern as arrangement or suspension. It is additionally called city water or wastewater. It comprises of almost 99% water alongside pathogenic microbes, suspended solids and particles. It is discharged in water bodies like lakes or streams and there is a need to guarantee the best possible treatment of these squanders so as to avert water contamination and related infections. Sewage is derieved from the latin word "exaquare" signifying 'to deplete out(water or other fluid substances) '

Read More
1658 Words | 7 Pages

Review of Literature Environmental issues began to be discussed and debated only towards the end of the 20th century. Since then significant amount of literature has been penned down raising awareness about issues of pollution, deforestation, animal rights and several others however it has failed to result in major changes, ideas or even actions to save the environment. Several species of animals have become extinct; pollution level is at an all-time high, global warming is leading to severe climate changes all across the globe but these problems do not seem to alarm the decision makers. Leydier & Martin (2013) also states that, “despite the increasing expression of concern in political and media debates about issues such as climate change, pollution and threats to biodiversity, “political ecology” (operating at the confluence of scientific developments, political engagement and ethical debates) is still trying to find its bearings” (p.7). It is quite evident that environmental issues are not treated in equivalence to political, economic, social or even religious issues.

Read More

More about The Effects Of Chromium On The Environment

Related Topics

Open Document