Literature Review On Coagulation

When these components are mixed with the water, this causes the tiny particles of soil to stick together or coagulate. These particles are now bigger and heavier, they are known as flocs which makes it easier to remove by settings of filtration.

Goal: Total Words in this Document: Title: 1. EC and Me: Why Electrocoagulation Matters 2. Water Treatment 101: What You Need to Know 3. What to do with Construction Wash Water?

The basis of this experiment was to test how different contaminates effect ground water when absorbed. The results were surprising as that I felt any additives would immediately change the entire break up and color of the water. What was most surprising to me was that filtering vinegar through ground water it came out relatively clean. I also believed that when filtered all of the water would have large traces of dirt, but that was not the case with the vinegar. This means that there are still viable ways to filter and purify water.

To ensure that the Animas River returns to its original state and the drainage from the Gold King Mine is cleaned up, we believe that a high density sludge process should be used. We believe the most effective high density sludge process is the health steele process. This process works by first mixing the sludge with lime in a tank so that the water can return to it’s original ph. Once the water reaches a safe ph for drinking, it reaches the lime reactor where air is added to ensure the water doesn’t change when exposed to air. Once the water leaves the lime reactor it is transported to the floc tank, where the remaining contaminated particles are removed from the drinking water. The final step is when the water reaches the clarifier and is sent back out to the river, as a healthy drinking water.

The first stage involves the removal of solid and liquid particles through filtration. Sydney Water mainly uses ferric chloride to prevent the recurrence of murky water. They also use small amounts of long chain polymers (polyelectrolyte) as a secondary coagulant. It is then followed by the inactivation of microorganisms; to which all monitored filtering plants uses a strong oxidant for disinfection (in Sydney Water, chlorine is used). The last stage involves the addition of fluoride to the water to fulfil the requirements of the Fluoridation of Public Water Supplies Act 1957. This, along with the added lime and carbon dioxide, reduces the corrosivity of

Another common remediation technique is stabilization or solidification which aims to alter the contaminants into a less soluble or mobile form (Wuana and Okieimen, 2011; Mulligan, Yong, and Gibbs, 2001; United States Environmental Protection Agency, 1991). In both methods water and a site-specific chemical solution is mixed into the soil to either alter its physical - make it less soluble - or chemical - reduce mobility - properties to make it less likely that the contaminants will move into other locations or be inhaled (Wuana and Okieimen, 2011; Mulligan, Yong, and Gibbs, 2001). Chemical treatment can also fall under the umbrella term of stabilization. Chemical treatment is add chemical solutions to the soil to detoxify the soil and can be used as a pre-treatment for other techniques such as solidification (Wuana and Okieimen, 2011; Mulligan, Yong, and Gibbs, 2001). These techniques are typically preferred due to lower costs but other physical elements of the soil, such as boulders, can make mixing the soil difficult and the process can volatilize and release volatile compounds (Mulligan, Yong, and Gibbs, 2001; United States Environmental Protection Agency, 1991). Mobility of contaminants can also be reduced by using the technique of vitrification through the process of heating up the soil (Wuana and Okieimen, 2011; United States Environmental Protection Agency, 1991). This method results

Chemical interactions can often lead to the production of environmentally unsafe byproducts. If the byproducts have no use, they are disposed as waste. Waste disposal companies make profit by collecting and disposing large amounts of these unused byproducts. These companies often concentrate the byproduct solutions so that they are easier to dispose of. One particular chemical waste disposal company wishes to utilize these concentrated byproduct solutions to create potentially useful solids (Bauer 45). It was the lab group’s goal to design procedures for creating

clotting in vessels. This makes the person more vulnerable if when cut for the blood flow to cease in

The objective of this lab was to separate a mixture that consisted of elements and compounds. There are seven ways to separate a mixture which included paper chromatography, filtration, evaporation, simple distillation, fractional distillation, magnetism, and separating funnel. The only methods used in this lab were filtration, evaporation, magnetism, and separating funnel. The method of magnetism was used when the magnet was moved under the mixture to separate the iron. The process of filtration involved the use of a filter paper placed in a filter funnel. The funnel was placed in a beaker and the mixture of water, sand, and sodium chloride was poured into the funnel. The liquid part drained through the filter paper into the beaker, leaving the solid sand particles trapped on the filter. After the water and sodium chloride were in a beaker, the process of evaporation was used. The compound was boiled on a hot plate, which led to the water

Immobility during long journeys or during disease struck period leads to many different complications. My interest in the problems faced by patients after surgeries and the elderly with less mobility, leading to deep vein thrombosis. Being able to recognize someone affected by Deep Vein Thrombosis, and diagnosing it before there are other complications that are formed due to this blockage between the veins. In the circulatory systems, the method of transport of blood from the heart and to the heart, operate on different mechanisms. Arteries have elastic muscle lining, which can withstand the pressure when the blood is pumped from the heart. Veins are transporting de-oxygenated blood back to the heart, and they lack muscle lining.

Instead of drawing small particles together, pool floc drags them down to the bottom, where it needs to be vacuumed out. Pool floc works quickly but you’ll lose a significant amount of water in the process.

Water plays a vital role in nearly all key processes of human life. From merely sustaining it in less developed countries, all the way up to being the cornerstone of many technological and industrial processes in modern America. The average consumption ranges from 5.4 liters in Madagascar to over 500 hundred liters in America1. This large consumption in the developed world can largely be attributed to the many technological advances and industrial processes that sustain our way of life today. However this water is rarely ever pure, usually it contains numerous minerals such as Mg2+ and Ca2+ that can contribute to scale build up in industrial processes that cause inefficiency and structural damage. This experiment serves to evaluate several filtration processes to see which is most efficient at removing minerals that contribute to water hardness and thus scale formation. First however we will gain a better understanding of water hardness.

The resultant factor XIIa causes thrombin activation, which in turn cleaves circulating soluble fibrinogen to generate an insoluble fibrin. Factor Xa an intermediate in the clotting cascade, causes increase in vascular permeability and leukocyte emigration. Thrombin participates in inflammation by enhancing leukocyte adhesion to endothelium and by generating fibrinopeptides that increase vascular permeability and are chemotactic for leukocytes. While activated Hageman factor is inducing clotting, it is concurrently activating the fibrinolytic system. The resulting product, plasmin also cleaves the complement C3 to component C3a, causes vasodilation and increase vascular permeability.47

Thrombin is a naturally occurring protein that is present in the blood of humans and animals. The main function of thrombin is as an intermediate step during hemostasis, which slows bleeding by forming blood clots. Thrombin acts as an enzyme during an injury, converting fibrinogen to fibrin, which then causes blood clots to form. Due to its properties, thrombin’s application to the medical field includes topical surgery in the case of minor injuries as well as various other medical procedures such as neurosurgical operations. Apart from applications in the medical field, thrombin also plays significant roles by directly interacting with endothelial cells throughout the body.

The second step of water treatment process is aeration. At the aerator, raw water is mixed with air. The aeration process helps to provide oxygen to the raw water which is needed for the oxidation process of dissolved iron and manganese in order for it to precipitate and therefore enables its removal through filtration (SAJ Holdings Sdn Bhd., n.d.). Wormleaton and Tsang (2000) stated that for water treatment process and also natural streams, it is essential to maintain a high amount of dissolved oxygen. Aeration also provides the escape of dissolved gases, such as carbon dioxide and hydrogen sulphide to reduce the corrosiveness of water, thus controls the tastes and odors of the water (Shun, 2007). Groundwater with high dissolved carbon dioxide levels or high concentrations of iron and manganese commonly require aeration as well as water drawn from reservoirs that is low in dissolved oxygen.