Abstract: This experiment was created to discover how effective Bentonite clay is in the removal of the contaminants known as Polycyclic Aromatic Hydrocarbons (PAHs). The clay was first synthesized, then used in a side-by-side experiment with charcoal, which is known to be successful in the adsorption of PAHs and used as a standard. An absorption spectrum for a red dye with PAHs was used to determine how much of the PAHs the clay and charcoal adsorbed. Although the clay did in fact adsorb PAHs, the charcoal was much more effective. Introduction: Polycyclic Aromatic Hydrocarbons (PAHs) are organic compounds that are suspected to be human carcinogens1.
On the Palette: Antique Gold Apply the Antique Gold diagonally, starting in the bottom left hand corner and take it to roughly 2/3 of the length, ending with a diagonal edge. With the Glaze moistened applicator, pick up a generous amount of Antique Gold and aggressively rub this color into the texture in a circular fashion, reversing and changing directions frequently to ensure the color gets into the lower areas of the texture.
The technique of the red-figure vase painting was the opposite. Red-figure vases remained the color of the clay and the background, filled in with a slip, turned black. When making the pot, the potter first shapes the vessel on a wheel. Most sizeable pots were made in parts. For example, the neck and body were done separately from the foot, which was often added later.
The air, the cake, and the pan are all at 450°F, but only the metal pan will burn your hand. Air has very low heat capacity and also low conductivity, so you can put your hand in the oven long enough to touch the cake and pan. The heat capacity of the cake is a lot higher than air, but since it has low conductivity you can briefly touch it without getting burned. The metal pan has a heat capacity similar to the cake, but high conductivity too. If you touch it, you will get burned.)
Hydraulic fracturing or more commonly known as “fracking” is an extreme water-intensive process. Fracking uses millions of gallons of water that is mixed with sand and harmful chemicals that is injected into the ground at a high pressure to fracture the surrounding rock. This process was started in the 1860s. It was mainly popular in places like Pennsylvania, New York, Wyoming, and Kentucky. They used liquid and solidified nitroglycerin but later applied the same methods with water and gas to achieve a greater outcome.
Analysis: 1. The candle getting smaller and the wax melting are physical changes. Wick turning black, candle having rain drop shaped fire, and the fire having different colored layers are all chemical changes. 2. The candle wax burns as a vapor because when the smoke it’s put into the other flame, the flame gets bigger which means it’s feeding off of the smoke.
With the use of this technique we placed chlorine, bromine, and iodine into solutions containing chloride, bromide, and iodide. In the reaction the free halogen (X2) oxidizes the other halide ion (Y-) and gets reduced by gaining electron(s). In table 3, chlorine was the strongest oxidizing agent and iodine was the weakest oxidizing agent. Since chlorine was the strongest oxidizing agent it will react more and the weak agent will react less. This explanation can be demonstrated in table 3 also because the results of the reactions demonstrates that chloride reacted more by the color of the product compared to the color of chloride in the mineral oil.
NEOLITHIC POTTERY Neolithic bowls and pots were made from coarse clay that was often found near a local riverbank. This clay was also often tempered with other materials to give it the attributes that were wanted for that particular vessel. Although many civilizations started using pottery at around the same time, the style of pottery varied from place to place. This was due to the geological features of the land and therefore affecting the clay. Before the Neolithic Revolution people stored their food in wooden bowls and baskets so the development of moulding clay and cooking it in an open fire was an important one.
Proper shielding and pipe rests are also needed due to the extreme heat of the glory hole and are adjusted by the team for the project at hand. The team ensures that there is large amount of wet paper and moist wood blocks for the
The orange in citrine is due to iron. When all varieties are combined, quartz makes up around 12% of the earth’s crust. Ametrine is a microcrystalline variety of quartz that occurs very rarely in nature. When amethyst is heated, it turns a shade of yellow. Therefore, most ametrine is simulated and not natural, it is just amethyst that has been heated to the point of changing color.