Practical assesment biology determine water potential pota

Describe the relationship between the change in mass and the molarity of the sucrose in the dialysis tube. Based on scientific principles, did you observe what you expected?

Practical assesment biology determine water potential pota

Treatment of this wastewater results in the generation of a number of bottom sediment sludges that must be removed for ultimate disposal. The Administrator has determined that wastewater from these wood preserving processes and the resulting bottom sediment sludges from waste- water treatment are solid wastes that may pose a substantial present or potential hazard to human health or the environment when improperly treated, stored, disposed of or otherwise managed, and therefore should be subject to appropriate.

Waste streams from wood preserving processes using waterborne inorganic pre- servatives are not Included in the listings of this document. However, the Agency plans to study the sludges generated from these wood preserving processes i. Wastes From Usage of Halogenated Hydrocarbon 2 Solvents in Degreasing Operations - The spent halogenated solvents used in degreasing, tetrachloroethylene, nethylene chloride, trichloroethylene, 1,1,1-tri- chloroethane, carbon tetrachloride, and the chlorinated fluorocarbons; and sludges resulting from the recovery of these sol- vents in degreasing operations T 2.

Wastes From Usage of Organic Solvents 30 The spent halogenated solvents, tetrachloro- ethylene, methylene chloride, trichlo. Electroplating and Metal Finishing Operations 82 Wastevater treatment sludges from electroplating operations 4.

Acetaldehyde Production Distillation bottoms from the production of acetaldehyde from ethylene T Distillation side-cuts from the production of acetaldehy Page Nitrobenzene Production - Distillation bottoms front the production of nitrobenzene by the nitration of benzene T Methyl Ethyl Pyridlne Production - Stripping still tails from the production of methyl ethyl pyridine T Toluene Dlisocyanate Production - Centrifuge residues from toluene dilsocya- nate production R,T Trichloroethylene and Perchloroethylene Production Chlordane Production - Wastewater and scrub water from the chlori- nation of cyclopentadiene in the production of chlordane T -x- Page Methomyl Production - Wastewater from the production of methomyl proposed T Petroleum Refining Dissolved air flotation DAF float from the petroleum refining industry T - Slop oil emulsion solids from the petroleum refining industry T Heat exchanger bundle cleaning sludge from the petroleum refining industry T API separator sludge from the petroleum re- fining industry T Tank bottoms leaded from the petroleum re- fining industry T -xii- Pa; Uastewater treatment sludges from the following subcategory of the leather tanning and finishing Industry: Coking - Ammonia still lime sludge T Steel Finishing - Spent pickle liquor from steel finishing operations C,T - Sludge from lime treatment of spent pickle liquor from steel finishing operations T Primary Lead Smelting Surface impoundent solids contained in and dredged from surface impoundments at pri- mary lead smelting facilities T The wastewater from wood preserving processes that use creosote and the sludges generated from the treatment of this waste- water will contain significant concentrations of polynuclear aromatic components of creosote.

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Wastewater and the resulting sludges from wood preserving operations that use both creosote and pentachlorophenol as preservatives will generate waste streams which contain all or most of the above contaminants. Phenollcs are toxic and, In some cases, bioaccumu- lative and carcinogenic.

About 90 percent of this wastewater Is treated by treatment methods which generate a bottom sediment sludge. The large quantity of waste generated increases the opportunity for exposure if waste mismanagement occurs.

Evaporation of wastewater In ponds, lagoons or by other treatment methods such as spray Irrigation, if mismanaged, could also lead to the release of hazardous constituents Into the atmosphere and result in substantial hazard via an air exposure pa thway.

If Improperly managed, incineration could result In the release of hazardous vapors to the atmosphere, presenting a substantial hazard via an air exposure pathway. This presents the possibility of the toxic components in the sludge migrating to nearby underground drinking water sources if the landfill is improperly designed or operated.

Industry Profile and Manufacturing Process There are more than wood preserving plants operated by about companies in the United States. The plants are concentrated in two areas, the Southeast from east Texas to Maryland, and along the North Pacific coast.

Practical assesment biology determine water potential pota

These areas correspond to the natural ranges of the southern pine and Douglas fir-western red cedar, respectively 2. Approximately million cubic feet of wood are treated each year 1principally for railroad ties, utility poles, and lumber for construction materials. It is estimated that approximately 85 percent is treated with creosote or penta- chlorophenol based preservatives as shown in Table 1 4.

The total quantity of preservative consumed in during these treatment cycles is shown in Table 2. Components may not add to totals due to rounding.

Briefly, the treatment consists of debarking, forming, drying, Impregnation of preservative, and storage 3. The two major wood preserving processes, producing large quantities of wastewater and sediment sludge, are called steaming and boultonlzlng.

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Figures la-le present flow diagrams for the major wood preserving processes Source: Steaming Is used principally on southern pines. After steaming, the preservative Is added to the same retort. Condensate removed from the retort after steaming Is contaminated with entrained oils, organic compounds, and wood carbohydrates.

The vapor removed Is composed of water, oils, organic compounds and carbohydrates from the wood. Industry Generation of Waste Based on the quantity of wood treated with creosote or pentachlorophenol preservatives inand assuming that about one gallon of wastewater is generated per cubic foot of wood treated, over million gallons of wastewater will be generated annually.

Almost all of this wastewater is treated by treatment methods that generate a bottom sediment sludge.Consider a potato cell is placed in pure water.

Initially the water potential outside the cell is 0 and is higher than the water potential inside the cell. Determine the mass of all 4 potato cylinders together and record. this line crosses the x axis represents the molar concentration of sucrose with a water potential that is equal to.

Understanding the osmotic potential of plant cells is a key part of understanding cellular processes.

Practical assesment biology determine water potential pota

Here we present two methods of determining osmotic potential of plant tissues using potatoes. Method one, the standard protocol for measuring weight change of tissues in varying osmotic solutions, is reliable but does not demonstrate the changing solute . Table 10 summarizes the concentrations of these substances in ambient water which have been found toxic to aquatic life or necessary to protect human health by the Agency's Office of Water Regulation and Standards.C3*) Comparison of these ambient water criteria with the concentrations of the pollutants found in the wood preserving industry's.

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New Student? Retrieve your Username and Password. Users must comply with the University Use of Computer Systems Policy. Diffusion lab report 1. Luke WangOctober 27, Mr. FergusonBiology 9 3B Diffusion Lab ReportQuestion How will the temperature of the water affect the rate of diffusion?Hypothesis If the water temperature is higher, then the rate of diffusion will increase, and vice leslutinsduphoenix.comles Independent Variable Water Temperature Dependent Variable Rate of Diffusion Controlled Variables Amount of water.

Investigation: Osmosis and Water Potential